A cable insulation tape

Abstract

This invention relates to the field of cable wrapping tape technology and discloses a cable insulation tape, including a wrapping insulation tape. One side of the tape is folded and bonded to form a strip-shaped cavity and filled with a support component. The other side is fixed with an embedding component. The top surface of the wrapping insulation tape is provided with a locking strip and a pressing protrusion. The bottom of the embedding component is provided with an insertion component. The support component and the embedding component provide rigid support for the wrapping insulation tape to prevent curling. During wrapping, the embedding component is inserted into the embedding groove formed by the front support component. When sliding down, it pushes the support component so that the vertical edge of the support component is tightly fitted with the edge of the front embedding component. The insertion component is inserted into the locking strip hole. The pressing protrusion presses the locking strip to lock the insertion component and prevent the embedding component from slipping. This invention aims to solve the problem that the interlayer connection of existing cable tapes is not tight enough during wrapping, which damages the integrity of the wrapping layer and affects the insulation performance. This solution eliminates interlayer gaps and air gaps, improves the stability of insulation performance and the structural strength of the wrapping layer.

Description

Technical Field

[0001] This invention relates to the field of cable wrapping tape technology, and more particularly to an insulating tape for cables. Background Technology

[0002] Cable insulation tape is a strip-shaped functional material used for the outer insulation protection of the core conductive parts of the cable, such as copper cores and aluminum cores. It is usually based on high molecular polymers, such as polyethylene, polyvinyl chloride, polypropylene, and cross-linked polyethylene. Some types are supplemented with reinforcing fibers, flame retardants, anti-aging agents and other modified components. It is made into a strip structure of specific width and thickness through processes such as extrusion, calendering and slitting. Its core function is to isolate the conductive core from the external environment during cable operation, prevent current leakage and avoid short circuit accidents. At the same time, it must have properties such as voltage resistance, temperature resistance, chemical corrosion resistance, mechanical wear resistance and a certain degree of flexibility to adapt to the cable laying environment, such as underground, high-altitude, humid or high-temperature scenarios and usage requirements. It is commonly used in the insulation layer wrapping of medium and low voltage cables, or in the insulation shielding layer, buffer layer and other auxiliary insulation structures of high voltage cables.

[0003] Chinese Patent CN207367649U discloses a fire-resistant insulating double-sided mica tape for wires and cables, relating to the field of cable accessory technology. This fire-resistant insulating double-sided mica tape for wires and cables includes a mica tape body, which comprises a phlogopite paper base layer and a fiberglass cloth layer. The fiberglass cloth layer is bonded to one side of the phlogopite paper base layer with a silicone resin adhesive. A carbon-free thin film layer is bonded to the other side of the phlogopite paper base layer with a silicone resin adhesive. This fire-resistant insulating double-sided mica tape for wires and cables, with the fiberglass cloth layer bonded to one side of the phlogopite paper base layer with a silicone resin adhesive, and the carbon-free thin film layer bonded to the other side of the phlogopite paper base layer with a silicone resin adhesive, provides excellent fire resistance and insulation, making it suitable for widespread use. This solves the problem that existing mica tapes used for wires and cables have poor fire resistance and insulation performance, hindering their widespread adoption.

[0004] Regarding the aforementioned and existing related technologies, the inventors believe that the following defects often exist: Existing cable tapes are generally designed as thin, flat structures. In actual wrapping operations, because the sides of the flat tape are straight and lack special adaptable structures, when the tape is wrapped around the surface of the cable core, the sides of the subsequent layer of tape can only form a simple overlap or butt joint with the sides of the previous layer, making it difficult to achieve a tight and stable connection. This connection method is prone to upward or downward curling of the tape sides due to factors such as wrapping tension fluctuations and insufficient rigidity of the tape itself. Curling not only damages the integrity of the wrapping layer but may also cause damage to the wrapping layer during subsequent cable laying or use, affecting the overall protective performance of the cable. Furthermore, loose side connections create gaps between adjacent layers of tape. These gaps easily trap air after wrapping, forming air gaps. The presence of air gaps affects the insulation performance of the cable wrapping tape. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the existing technology is usually a thin, flat cable tape. Because there is no special fitting structure on the side, the back layer and the front layer can only be simply overlapped or butted during wrapping. It is easy to curl the edges due to the fluctuation of wrapping tension and insufficient rigidity of the tape. It is also easy to form air gaps that retain air, which will damage the integrity of the wrapping layer and affect the insulation performance of the cable wrapping tape. Therefore, we propose an insulating tape for cables.

[0006] To achieve the above objectives, this application adopts the following technical solution: an insulating tape for cables, comprising: a wrapped insulating tape, one side of which is folded upward along its length, the folded side being bonded to the top surface of the wrapped insulating tape to form a strip-shaped cavity, the inside of which is filled with a support component, an embedding component being fixedly connected to the side of the wrapped insulating tape away from the strip-shaped cavity, an insertion component being fixedly connected to the bottom of the embedding component, a locking strip being fixedly connected to the top surface of the wrapped insulating tape, the locking strip being disposed on the side of the strip-shaped cavity, and an extrusion protrusion being fixedly connected to the top surface of the wrapped insulating tape, the extrusion protrusion being disposed on the side of the locking strip away from the strip-shaped cavity.

[0007] Preferably, the support component includes a support bar, one side of which has a vertical edge, and the other side of which has an inclined edge, with a bent edge connecting to the bottom of the inclined edge.

[0008] Preferably, when the support component is in the wrapping state, a certain gap is reserved between adjacent support components to form an embedding groove.

[0009] Preferably, the embedding component includes an embedding strip, which, when in a wrapped state, is inserted into the previous embedding groove.

[0010] Preferably, one side of the embedding strip is provided with a pressing edge, and the inclination angle of the pressing edge is consistent with the inclination angle of the inclination edge; the other side of the embedding strip is provided with a fitting edge.

[0011] Preferably, the top surface of the locking strip is provided with a plurality of stretchable or compressible holes, and the locking strip is aligned with the embedded groove.

[0012] Preferably, the cross-sectional shape of the extrusion protrusion is set to semi-circular, and the extrusion protrusion is used to compress the hole on the top surface of the locking strip.

[0013] Preferably, the insertion component is provided with several groups at equal intervals about the bottom of the embedded component, and in the wrapping state, the insertion component is inserted into the hole at the top of the previous locking strip.

[0014] Preferably, the insertion component includes an insertion post, which is fixedly connected to the bottom of the embedding strip.

[0015] Preferably, the bottom end of the insertion post is fixedly connected to a locking end, and the locking end is shaped as an inverted cone.

[0016] The technical effects and advantages of this invention are as follows: This invention uses a structure where one side of the wrapped insulating tape is folded and bonded to form a strip-shaped cavity and filled with a support component, while the other side is fixed with an embedded component. This structure allows the support component and the embedded component to provide rigid support for the wrapped insulating tape from both sides, effectively resisting the stress generated by the tension fluctuations of the wrapping tape, completely avoiding edge curling of the wrapped insulating tape, ensuring the integrity of the wrapping layer, and solving the problem of reduced protective performance caused by edge curling of traditional tapes. Furthermore, during wrapping, the embedded component is precisely inserted into the embedded groove formed by the previous set of support components. Through the interlocking method, the stability of the connection between the tape layers during wrapping is effectively improved. At the same time, when the embedded component slides down, it generates a forward pushing force on the support component. The locking cooperation between the bottom insertion component of the embedded component and the locking strip and extrusion protrusion on the top surface of the wrapped insulating tape prevents the embedded component from sliding upward, promoting a tight fit between the vertical edge and the previous edge, eliminating tiny gaps between layers, further improving the tightness of the connection, eliminating air gaps, ensuring that the pushing force acts stably on the edge bonding area, and significantly improving the stability of insulation performance. Attached Figure Description

[0017] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts:

[0018] Figure 1 This is an exploded structural diagram of the cross-section of the two-ring strip wrapped state of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention in the wrapped state; Figure 3 This is a schematic diagram of the external structure of the present invention in its wrapped state; Figure 4 This is a cross-sectional structural diagram of the present invention; Figure 5 This is a three-dimensional structural diagram of the present invention; Figure 6 This is a three-dimensional structural diagram of the embedded component and locking strip portion of the present invention; Figure 7 This is a three-dimensional structural diagram of the support component of the present invention; Figure 8 for Figure 4 Enlarged structural diagram at point A; Figure 9 for Figure 5 Enlarged structural diagram at point B; Figure 10 for Figure 6 A magnified structural diagram at point C.

[0019] Legend: 1. Wrapped insulating tape; 2. Support assembly; 3. Embedded assembly; 4. Locking strip; 5. Extruded protrusion; 6. Insertion assembly; 7. Embedded groove; 201. Supporting strip; 202. Inclined edge; 203. Bending edge; 204. Vertical edge; 301. Embedded strip; 302. Pressing edge; 303. Adhesive edge; 601. Insertion post; 602. Locking end. Detailed Implementation

[0020] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0021] In the cable manufacturing industry, to achieve insulation, shielding, or protection functions for the cable core, it is often necessary to use strip-shaped cable tape to wrap the cable core. Currently, existing cable tapes are generally designed as thin, flat structures. While this structure is convenient to process and easy to achieve continuous wrapping, it has significant technical defects in actual wrapping operations. Specifically, because the sides of the flat tape are straight and lack special fitting structures, when the tape is wrapped around the surface of the cable core, the sides of the subsequent layers of tape can only form a simple overlap or butt joint with the sides of the previous layers, making it difficult to achieve a tight and stable connection. This connection method is prone to upward or downward curling of the tape sides due to factors such as wrapping tension fluctuations and insufficient rigidity of the tape itself. Curling not only damages the integrity of the wrapping layer but may also cause damage to the wrapping layer during subsequent cable laying or use, affecting the overall protective performance of the cable. To solve this technical problem, this application makes the following improvements: Refer to Figure 1 , Figure 2 and Figure 3As shown, the present invention provides a technical solution: an insulating tape for cables, comprising: a wrapped insulating tape 1, one side of the wrapped insulating tape 1 being folded upward along its length, the folded side being bonded to the top surface of the wrapped insulating tape 1 to form a strip-shaped cavity, the inside of the strip-shaped cavity being filled with a support component 2, and an embedding component 3 being fixedly connected to the side of the wrapped insulating tape 1 away from the strip-shaped cavity, the support component 2 comprising a support bar 201, one side of the support bar 201 being provided with a vertical edge 204, the other side of the support bar 201 being provided with an inclined edge 202, and the bottom of the inclined edge 202 being connected with a bent edge 203, when the support component 2 is in the wrapped state, a certain gap is reserved between adjacent support components 2 to form an embedding groove 7, the embedding component 3 comprising an embedding bar 301, when it is in the wrapped state, the embedding component 3 is inserted into the previous embedding groove 7.

[0022] Please see Figure 5 and Figure 6 As shown, a support component 2 is provided on one side of the thin-sheet wrapped insulation tape 1, and an embedding component 3 is provided on the other side. The support component 2 and the embedding component 3 provide structural support for the wrapped insulation tape 1 from both sides, enhance the rigidity of the side, effectively resist the stress caused by tension fluctuations during the wrapping process, prevent the side of the wrapped insulation tape 1 from curling up or down, and ensure the flatness and integrity of the edge of the wrapping layer. When the tape is wrapped, the embedding component 3 can be pressed into the embedding groove 7 formed by the previous set of support components 2. This adapter structure can achieve precise fitting of the sides of adjacent tapes, replacing the traditional simple overlapping, greatly improving the tightness and stability of the connection of the cable tape sides, thereby reducing or even eliminating side gaps, avoiding air retention and forming air gaps, effectively improving the sealing of the insulation wrapping, and thus improving the stability of its insulation performance.

[0023] Please see Figure 7 and Figure 8As shown, one side of the embedding strip 301 is provided with a pressing edge 302, and the inclination angle of the pressing edge 302 is consistent with the inclination angle of the inclined edge 202. The other side of the embedding strip 301 is provided with a fitting edge 303. When the embedding component 3 is inserted into the pre-reserved embedding groove 7 of the previous ring, the pressing edge 302 slides down along the inclined edge 202 and generates a forward pushing force on the inclined edge 202, pushing the support component 2 forward, so that its other vertical edge 204 is tightly fitted with the fitting edge 303 in the previous ring of the embedding component 3. The pushing force formed by the embedding component 3 pressing into the embedding groove 7 on the previous ring of the support component 2 can have This effectively eliminates any remaining minute gaps between the previous support component 2 and the previous embedded component 3, achieving a secondary tight fit between adjacent strip layers. This prevents loosening caused by insufficient initial wrapping tension or strip rebound, eliminates the hidden danger of air gaps, and enhances the stability of cable wrapping insulation performance. At the same time, the tight compression between the support component 2 and the embedded component 3 forms a continuous and stable interlayer connection structure, improving the overall structural strength and tensile and displacement resistance of the wrapping layer. This reduces deformation and damage to the wrapping layer caused by external forces during cable laying or use, further extending the cable's service life and ensuring its long-term operational reliability.

[0024] To ensure that the forward pushing force generated by the support component 2 on the embedded component 3 during wrapping is sufficient to ensure a tight fit between the support component 2 and the embedded component 3, and to prevent the embedded component 3 from sliding upward along the previous inclined edge 202, this application makes the following improvements:

[0025] Please see Figure 4 , Figure 5 , Figure 8 , Figure 9 and Figure 10 As shown, the bottom of the embedded component 3 is fixedly connected to the insertion component 6, and the top surface of the wrapped insulating tape 1 is fixedly connected to the locking strip 4. The locking strip 4 is located on the side of the strip-shaped cavity. The top surface of the wrapped insulating tape 1 is also fixedly connected to the extrusion protrusion 5. The extrusion protrusion 5 is located on the side of the locking strip 4 away from the strip-shaped cavity. The top surface of the locking strip 4 is provided with several stretchable or compressible holes. The locking strip 4 is aligned with the embedded groove 7. The cross-sectional shape of the extrusion protrusion 5 is set as a semi-circle. The extrusion protrusion 5 is used to compress the holes on the top surface of the locking strip 4. The insertion component 6 is provided with several sets at equal intervals about the bottom of the embedded component 3. In the wrapped state, the insertion component 6 is inserted into the hole at the top of the previous locking strip 4. The insertion component 6 includes an insertion post 601. The insertion post 601 is fixedly connected to the bottom of the embedded strip 301. The bottom end of the insertion post 601 is fixedly connected to a locking end 602, and the locking end 602 is set as an inverted cone shape.

[0026] The inverted conical locking end 602 is easy to insert into the opening of the top surface of the locking strip 4. As the inserting component 3 presses the locking strip 4 into the bottom of the inserting groove 7, the extrusion convex strip 5 rotates and folds in the direction of the locking strip 4, extruding the locking strip 4. The opening on the top surface of the locking strip 4 can deform in coordination with the extrusion action, further enhancing the wrapping and fixing effect on the inserting component 6, thereby limiting and locking the inserting component 6 that has been inserted into the locking strip 4. In addition, the flat surface at the top of the inverted conical locking end 602 is easy to hook into the opening of the locking strip 4, further improving the stability of the locking and fixing.

[0027] The bottom surface of the embedded component 3, through the locking engagement between the insert component 6 and the locking strip 4, can achieve precise positioning and connection between the embedded component 3 and the corresponding embedded groove 7 of the wrapping insulation tape 1 in the initial stage of fitting, laying the foundation for a tight connection. On the other hand, as the wrapping is pressed down, the semi-circular extrusion protrusion 5 folds and presses against the locking strip 4 at the connection point, which can form a mechanical lock between the bottom surface of the embedded component 3 and the locking strip 4 through the insert component 6, so that the embedded component 3 and the embedded groove 7 form a stable fixed structure at the connection point. This avoids the displacement of the embedded component 3 caused by the pushing force generated by the support component 2 on the embedded component 3, and allows the forward pushing force generated by the support component 2 on the embedded component 3 to be transmitted more directly to the side contact area, so that the support component 2 and the side of the embedded component 3 are continuously pressed tightly, effectively avoiding the generation of air gaps, and greatly improving the sealing and stability of the tape side connection, providing key support for the optimization of cable insulation and protection performance.

[0028] Working principle: The insulating tape is wrapped around the outside of the cable filling layer at a certain angle. After removing the folded strip cavity part of the wrapped insulating tape 1, the remaining part is still a strip sheet. When wrapping, the strip sheet part of the wrapped insulating tape 1 covers the strip cavity outside the previous ring of support component 2. A certain gap is reserved between the next ring of support component 2 and the previous ring of support component 2. The width of the reserved gap is consistent with the width of the locking strip 4, forming an embedded groove 7. The locking strip 4 and the extrusion protrusion 5 are aligned with the embedded groove 7. Since the extrusion protrusion 5 and the locking strip 4 are adjacent and fixedly connected above the wrapped insulating tape 1, the extrusion protrusion 5 can rotate around the side adjacent to the locking strip 4.

[0029] During the next wrapping, the embedded component 3 aligns with the embedded groove 7 formed between the support components 2 of the previous two wraps. When it is wrapped tightly, the embedded strip 301 presses down on the locking strip 4, and at the same time pulls the wrapping insulation tape 1 below the locking strip 4 to adhere to the inner wall of the embedded groove 7. At this time, the hole on the top surface of the locking strip 4 is in a stretched and open state, and the insertion component 6 on the bottom surface of the embedded strip 301 is inserted into its hole. After the embedded strip 301 is gradually pressed into the embedded groove 7, the extrusion protrusion 5 is squeezed and guided by the bending edge 203 at the bottom of the embedded groove 7, and moves along the locking strip. The adjacent edges of the strip 4 rotate toward the locking strip 4. When the extrusion protrusion 5 and the locking strip 4 are completely inserted into the bottom of the embedding groove 7, the extrusion protrusion 5 has a squeezing effect on the locking strip 4, thereby compressing and closing the hole on the top surface of the locking strip 4, and fixing the insertion component 6 inside the locking strip 4. While the embedding strip 301 is gradually pressed down and inserted into the embedding groove 7 along the inclined edge 202, it also provides a forward pushing force to the support component 2 in front of it, thereby making the vertical edge 204 in the support component 2 closely fit the contact edge 303 in the previous embedding strip 301.

[0030] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. An insulating tape for electric cables, characterized by, The utility model provides a kind of winding insulation belt, the side of the winding insulation belt is folded upwards along its length direction, the side folded upwards is bonded together with the top surface of winding insulation belt, form strip cavity, the inside of the strip cavity is filled with support component, the side of the winding insulation belt away from strip cavity is fixedly connected with embedded component, the bottom of the embedded component is fixedly connected with insertion component, the top surface of the winding insulation belt is fixedly connected with locking strip, the locking strip is arranged in the side of strip cavity, the top surface of the winding insulation belt is also fixedly connected with extrusion convex strip, the extrusion convex strip is arranged in the side of locking strip away from strip cavity, and since extrusion convex strip is adjacent with locking strip and is fixedly connected on the top of winding insulation belt, extrusion convex strip can rotate around the side adjacent with locking strip;When winding, embedded component slides down to generate forward pushing force to support component, and the bottom insertion component of embedded component is locked with the locking of locking strip and extrusion convex strip on the top of winding insulation belt.

2. The insulated tape for electrical cables according to claim 1, characterized in that: The support component includes a support strip, one side of the support strip is provided with a vertical edge, and the other side of the support strip is provided with an inclined edge, and the bottom of the inclined edge is connected with a bent edge.

3. The insulated tape for electrical cables according to claim 1, characterized in that: When the support component is in a winding state, a certain gap is reserved between adjacent support components to form an embedded slot.

4. The insulated electrical cable of claim 1, wherein: The embedded component includes an embedded strip, and when it is in a winding state, the embedded component is inserted into the inside of the previous embedded slot.

5. The insulated electrical cable of claim 4, wherein: One side of the embedded strip is provided with a pressing edge, and the inclination angle of the pressing edge is consistent with the inclination angle of the inclined edge, and the other side of the embedded strip is provided with a fitting edge.

6. The insulated electrical cable of claim 1, wherein: The top surface of the locking strip is provided with a plurality of stretchable or compressible holes, and the locking strip is aligned with the embedded slot.

7. The insulated electrical cable of claim 1 wherein: The cross-sectional shape of the extrusion convex strip is semicircular, and the extrusion convex strip is used to compress the holes on the top surface of the locking strip.

8. The insulated electrical cable of claim 1, wherein: A plurality of groups of insertion components are equidistantly arranged with respect to the bottom of the embedded component, and when in a winding state, the insertion components are inserted into the inside of the holes on the top of the previous locking strip.

9. The insulated electrical cable of claim 1 wherein: The insertion component includes an insertion column, and the insertion column is fixedly connected to the bottom of the embedded strip.

10. The insulated electrical cable of claim 9, wherein: The bottom end of the insertion column is fixedly connected with a locking end, and the shape of the locking end is inverted conical.

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