Flame-retardant double-wall heat shrink tube

Abstract

The utility model discloses a flame-retardant double-wall heat-shrinkable tube, which comprises a flame-retardant insulating sleeve, a heat-shrinkable sleeve and an external sleeve, wherein the heat-shrinkable sleeve is nested and attached outside the flame-retardant insulating sleeve; the external sleeve is adhered and fixedly connected to the right side of the flame-retardant insulating sleeve; connection limiting structures are arranged at the left end and the right end of the flame-retardant insulating sleeve and the heat-shrinkable sleeve, and each connection limiting structure comprises a left limiting hole, a right limiting hole, a left fixing block, a right fixing block and bonding glue; a locking anti-falling structure is arranged on the inner side of the heat-shrinkable sleeve and the outer connecting sleeve; the locking anti-falling structure comprises a bearing block, a connecting strip, a groove, a tooth block, a limiting hole and a limiting block; and the left limiting hole and the right limiting hole are respectively formed in the left end and the right end of the heat-shrinkable sleeve in a central symmetry manner. According to the flame-retardant double-wall heat shrink tube, the flame-retardant insulating sleeve is arranged, so that the stable flame-retardant performance of the heat shrink tube is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of cold and heat shrinkable products, in particular to a flame-retardant double-wall heat shrinkable tube. Background Technique

[0002] The heat shrinkable tube is a cold and heat shrinkable product made of several different thermoplastics, with excellent flame-retardant and insulating properties, low shrinkage temperature, and fast shrinkage. It is widely used in wire connection, wire end treatment, solder joint protection, wire harness identification, insulation protection of resistors and capacitors, etc.

[0003] For example, the Chinese utility model patent with the authorization announcement number CN209895855U discloses a flame-retardant double-wall heat shrinkable tube, which includes an inner sleeve, an outer sleeve, a clamping block, a clamping groove, a flame-retardant layer, a fixing plate, a fixing shaft, a sliding rod, a pressing plate, a connecting shaft and a sleeve shaft. The structure of the flame-retardant double-wall heat shrinkable tube is simple and easy to operate. The flame-retardant layer arranged between the heat shrinkable tubes is beneficial to improving the fire resistance of the heat shrinkable tube, and the design of the clamping block and the clamping groove is beneficial to the connection between the heat shrinkable tubes, which is beneficial to fixation and avoids the problem of falling off; the flame-retardant double-wall heat shrinkable tube facilitates the fixation between the connecting shaft and the fixing plate through the rotation of the sleeve, facilitates the fixation after connection, improves the convenience of operation, avoids the problem of the heat shrinkable tube falling off caused by long-term use, and improves the service life.

[0004] However, for the existing flame-retardant double-wall heat shrinkable tubes, during use, the flame-retardant insulating sleeve and the heat shrinkable sleeve are prone to shift, affecting the use, and it is difficult to quickly tighten the flame-retardant insulating sleeve to lock and prevent the wires nested in the flame-retardant insulating sleeve from falling off. Therefore, we propose a flame-retardant double-wall heat shrinkable tube to solve the problems raised above. Content of the Utility Model

[0005] The purpose of the utility model is to provide a flame-retardant double-wall heat shrinkable tube to solve the problems in the above-mentioned background technique that for the existing flame-retardant double-wall heat shrinkable tubes, during use, the flame-retardant insulating sleeve and the heat shrinkable sleeve are prone to shift, affecting the use, and it is difficult to quickly tighten the flame-retardant insulating sleeve to lock and prevent the wires nested in the flame-retardant insulating sleeve from falling off.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A flame-retardant double-wall heat shrinkable tube, comprising: a flame-retardant insulating sleeve, a heat shrinkable sleeve nested and attached to the outside of the flame-retardant insulating sleeve, and an external sleeve adhesively fixed and connected to the right side of the flame-retardant insulating sleeve;

[0007] It further includes:

[0008] Connection limiting structures are arranged at the left and right ends of the flame-retardant insulating sleeve and the heat shrinkable sleeve. The connection limiting structure includes a left limiting hole, a right limiting hole, a left fixing block, a right fixing block and an adhesive;

[0009] The inner sides of the heat-shrinkable sleeve and the external sleeve are provided with a locking and anti-detaching structure, which includes a receiving block, a connecting strip, a groove, a tooth block, a limiting hole and a limiting block.

[0010] Preferably, the left limiting hole and the right limiting hole are symmetrically centered and opened inside the left and right ends of the heat-shrinkable sleeve respectively, and the left limiting hole and the right limiting hole are arranged staggeredly.

[0011] Preferably, the inner sides of the left limiting hole and the right limiting hole are respectively nested with a left fixing block and a right fixing block, and the left fixing block and the right fixing block are respectively fixedly connected to the outer sides of the left and right ends of the flame-retardant insulating sleeve, and adhesive for adhesive connection is provided on the inner sides of the left limiting hole and the left fixing block and the right limiting hole and the right fixing block.

[0012] Preferably, the outer end diameter of the external sleeve is larger than the outer diameter of the flame-retardant insulating sleeve and the inner diameter of the heat-shrinkable sleeve, and the receiving block is fitted to the lower side of the right end of the flame-retardant insulating sleeve, and a connecting strip is fixedly connected to the front side of the upper end of the receiving block.

[0013] Preferably, the connecting strip is wound and fitted around the flame-retardant insulating sleeve, a groove is formed inside the connecting strip, and tooth blocks are fixedly connected at equal intervals inside the groove.

[0014] Preferably, a limiting hole is formed inside the receiving block, a limiting block is arranged inside the limiting hole and is fixed thereto, the connecting strip is clamped and penetrates through the limiting hole, and the limiting block and the tooth block are snap-fitted and connected.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: The flame-retardant double-wall heat-shrinkable tube facilitates the limitation of the flame-retardant insulating sleeve and the heat-shrinkable sleeve to prevent them from shifting, and facilitates the quick tightening of the flame-retardant insulating sleeve to lock and prevent the wires nested inside the flame-retardant insulating sleeve from falling off;

[0016] 1. There are provided a flame-retardant insulating sleeve, a heat-shrinkable sleeve, a left limiting hole and a right limiting hole. Since the heat-shrinkable sleeve is nested and fitted on the outer side of the flame-retardant insulating sleeve, the left limiting hole and the right limiting hole which are staggered are symmetrically centered and opened inside the left and right ends of the heat-shrinkable sleeve, and the left fixing block and the right fixing block fixedly connected to the flame-retardant insulating sleeve are nested inside the left limiting hole and the right limiting hole, and adhesive is fixedly pasted on the inner sides of the left limiting hole and the left fixing block and the right limiting hole and the right fixing block. Therefore, it is convenient to limit the flame-retardant insulating sleeve and the heat-shrinkable sleeve to prevent them from shifting;

[0017] 2. A flame-retardant insulating sleeve, an external sleeve, a receiving block, and a connecting strip are provided. Since the external sleeve is fixedly adhered to the right side of the flame-retardant insulating sleeve, the outer diameter dimension of the external sleeve is larger than the inner diameter dimension of the flame-retardant insulating sleeve, and the receiving block and the connecting strip which are fixedly connected are fitted to the outer side of the flame-retardant insulating sleeve. A limiting hole and a groove are respectively formed inside the receiving block and the connecting strip, and the connecting strip passes through the inside of the limiting hole. The tooth blocks fixedly connected at equal intervals inside the groove and the limiting block fixed inside the connecting strip are in snap connection. Therefore, it is convenient to quickly tighten the flame-retardant insulating sleeve and lock the wires nested inside the flame-retardant insulating sleeve to prevent them from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a front view structural schematic diagram of the present utility model;

[0019] Figure 2 is a front view sectional structural schematic diagram of the present utility model;

[0020] Figure 3 is a right side view sectional structural schematic diagram of the connection between the fixing block and the flame-retardant insulating sleeve of the present utility model;

[0021] Figure 4 is a right side view sectional structural schematic diagram of the connection between the connecting strip and the flame-retardant insulating sleeve of the present utility model.

[0022] In the figure: 1, flame-retardant insulating sleeve; 2, heat-shrinkable sleeve; 3, left limiting hole; 4, right limiting hole; 5, left fixing block; 6, right fixing block; 7, adhesive; 8, external sleeve; 9, receiving block; 10, connecting strip; 11, groove; 12, tooth block; 13, limiting hole; 14, limiting block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Please refer to Figures 1-4, the present utility model provides a technical solution: a flame-retardant double-wall heat-shrinkable tube, which includes a flame-retardant insulating sleeve 1, a heat-shrinkable tube 2, a left limiting hole 3, a right limiting hole 4, a left fixing block 5, a right fixing block 6, an adhesive 7, an external sleeve 8, a receiving block 9, a connecting strip 10, a groove 11, a tooth block 12, a limiting hole 13 and a limiting block 14. The heat-shrinkable tube 2 is nested and fitted outside the flame-retardant insulating sleeve 1, and the external sleeve 8 is fixedly connected by adhesion on the right side of the flame-retardant insulating sleeve 1. Connecting and limiting structures are provided at the left and right ends of the flame-retardant insulating sleeve 1 and the heat-shrinkable tube 2. The connecting and limiting structures include a left limiting hole 3, a right limiting hole 4, a left fixing block 5, a right fixing block 6 and an adhesive 7. A locking and anti-detachment structure is provided inside the heat-shrinkable tube 2 and the external sleeve 8. The locking and anti-detachment structure includes a receiving block 9, a connecting strip 10, a groove 11, a tooth block 12, a limiting hole 13 and a limiting block 14;

[0025] Before using this flame-retardant double-wall heat-shrinkable tube, such as Figure 1 , Figure 2 and Figure 3 , first, the heat-shrinkable tube 2 can be nested outside the flame-retardant insulating sleeve 1, so that the left limiting hole 3 and the right limiting hole 4 symmetrically opened at the centers of the left and right ends of the heat-shrinkable tube 2 correspond to the left fixing block 5 and the right fixing block 6 symmetrically fixed on the outer sides of the left and right ends of the flame-retardant insulating sleeve 1. Then, the heat-shrinkable tube 2 can be operated by a hair dryer, so that the heat-shrinkable tube 2 shrinks, achieving the purpose of nesting the left fixing block 5 and the right fixing block 6 in the left limiting hole 3 and the right limiting hole 4 respectively. Then, the adhesive 7 can be arranged inside the left limiting hole 3 and the left fixing block 5 and the right limiting hole 4 and the right fixing block 6, so as to paste and fix the heat-shrinkable tube 2 through the adhesive 7 via the left fixing block 5 and the right fixing block 6, thereby facilitating the limitation of the flame-retardant insulating sleeve 1 and the heat-shrinkable tube 2 and preventing them from shifting;

[0026] Such as Figure 1 , Figure 2 and Figure 4, during the use of the flame-retardant double-wall heat-shrinkable tube, the flame-retardant double-wall heat-shrinkable tube can be first nested outside the wire to be protected. Then, the receiving block 9 can be fitted on the lower right side of the flame-retardant insulating sleeve 1, so that the left and right sides of the receiving block 9 are respectively fitted with the heat-shrinkable tube 2 and the external sleeve 8. Next, the connecting strip 10 fixedly connected to the front side of the upper end of the receiving block 9 can be pulled to wind around the outside of the flame-retardant insulating sleeve 1. Then, the outer end of the connecting strip 10 can be passed through the limiting hole 13 opened inside the receiving block 9. Since a groove 11 is opened inside the connecting strip 10, and tooth blocks 12 fixedly connected to the connecting strip 10 are arranged at equal intervals in the groove 11, and a limiting block 14 fixedly connected to the receiving block 9 is arranged on the inner side of the limiting hole 13, after the connecting strip 10 is nested in the limiting hole 13, the limiting block 14 and the tooth block 12 are snap-locked, achieving the purpose of limiting the connecting strip 10 through the tooth block 12 and the limiting block 14, and by pulling down the connecting strip 10 inside the receiving block 9, it is convenient to quickly tighten the flame-retardant insulating sleeve 1 and lock the wires nested inside the flame-retardant insulating sleeve 1 to prevent them from falling off.

[0027] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art. Coupled with the circuit connection adopting the conventional connection method in the prior art, it will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Flame-retardant double-wall heat-shrinkable tube, comprising: flame retardant Insulating sleeve (1), heat-shrinkable sleeve (2) nested and fitted outside the flame-retardant insulating sleeve (1), and external sleeve (8) adhesively fixed and connected to the right side of the flame-retardant insulating sleeve (1); It is characterized in that it further includes: Connection limiting structures are arranged at the left and right ends of the flame-retardant insulating sleeve (1) and the heat-shrinkable sleeve (2). The connection limiting structures include left limiting holes (3), right limiting holes (4), left fixing blocks (5), right fixing blocks (6) and adhesive (7); Locking and anti-detachment structures are arranged inside the heat-shrinkable sleeve (2) and the external sleeve (8). The locking and anti-detachment structures include receiving blocks (9), connecting strips (10), grooves (11), tooth blocks (12), limiting holes (13) and limiting blocks (14).

2. The flame-retardant double-wall heat-shrinkable tube according to claim 1, wherein: The left limiting hole (3) and the right limiting hole (4) are symmetrically arranged at the centers of the left and right ends inside the heat-shrinkable sleeve (2), and the left limiting hole (3) and the right limiting hole (4) are arranged in a staggered manner.

3. The flame-retardant double-wall heat-shrinkable tube according to claim 1, wherein: The left fixing block (5) and the right fixing block (6) are respectively nested inside the left limiting hole (3) and the right limiting hole (4), and the left fixing block (5) and the right fixing block (6) are respectively fixedly connected to the outer sides of the left and right ends of the flame-retardant insulating sleeve (1). Moreover, adhesive (7) for adhesive connection is arranged inside the left limiting hole (3) and the left fixing block (5) and inside the right limiting hole (4) and the right fixing block (6).

4. The flame-retardant double-wall heat-shrinkable tube according to claim 1, characterized in that: The outer diameter of the outer sleeve (8) is larger than the outer diameter of the flame-retardant insulating sleeve (1) and the inner diameter of the heat-shrinkable sleeve (2). The receiving block (9) is fitted to the lower side of the right end of the flame-retardant insulating sleeve (1), and a connecting strip (10) is fixedly connected to the front side of the upper end of the receiving block (9).

5. The flame-retardant double-wall heat-shrinkable tube according to claim 1, wherein: The connecting strip (10) is wound and fitted around the flame-retardant insulating sleeve (1), a groove (11) is formed inside the connecting strip (10), and tooth blocks (12) are fixedly connected at equal intervals inside the groove (11).

6. The flame-retardant double-wall heat-shrinkable tube according to claim 1, wherein: A limiting hole (13) is formed inside the receiving block (9), a limiting block (14) is arranged and fixed inside the limiting hole (13), the connecting strip (10) is snap-fitted through the limiting hole (13), and the limiting block (14) and the tooth block (12) are snap-fitted and connected.

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