Electric power cold contraction sealing pipe

Abstract

The utility model discloses an electric power cold contraction sealing tube, which comprises a cold contraction sleeve and a supporting tube arranged in the cold contraction sleeve, the two ends of the inner wall of the cold shrink sleeve are provided with annular recessed spaces. The supporting tube is of a tubular structure formed by continuously winding a wire rod in the spiral direction and is provided with a plurality of circles of spiral structures connected with one another. A glue injection groove is formed in the outer surface of each circle of spiral structure; and all the glue injection grooves are communicated with one another to form a glue injection channel communicated with the annular concave space. According to the utility model, the sealant can be injected into the inner wall of the cold shrink sleeve from the outside, and the cold shrink sleeve and the sealant act together to form a sealing effect, so that the sealing effect is effectively improved, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of cold-shrinkable tubes, and particularly to a power cold-shrinkable sealing tube. Background Art

[0002] In the power industry, cold-shrinkable tubes are often used to seal and protect the exposed cable connection joints. A cold-shrinkable tube generally refers to a cold-shrinkable cable accessory, which is injection-molded and vulcanized from an elastomer material in a factory, and then expanded in diameter and lined with a plastic spiral support. When in use, the plastic spiral support is pulled out, and the cold-shrinkable tube automatically shrinks to achieve fitting and sealing with the cable. In actual use, the sealing tube with the above structure has insufficient sealing performance. Affected by thermal expansion and contraction, when the temperature changes, the fitting degree between the cold-shrinkable tube and the cable decreases, resulting in a reduction in the sealing performance of the cold-shrinkable tube. And affected by the irregular outer diameter of the cable, the fitting degree between the cold-shrinkable tube and the cable also decreases, resulting in a reduction in the sealing performance of the cold-shrinkable tube. Summary of the Utility Model

[0003] In view of the above technical problems, the object of the present utility model is to propose a power cold-shrinkable sealing tube that can inject sealant into the inner wall of the cold-shrinkable sleeve from the outside. The combined action of the cold-shrinkable sleeve and the sealant forms a sealing effect, effectively improving the sealing effect and having strong practicability.

[0004] The technical solution of the present utility model is realized as follows: A power cold-shrinkable sealing tube includes a cold-shrinkable sleeve and a support tube disposed inside the cold-shrinkable sleeve;

[0005] Both ends of the inner wall of the cold-shrinkable sleeve are provided with annular recessed spaces;

[0006] The support tube is a tubular structure formed by continuously winding a wire along a spiral direction, and it has several interconnected spiral structures; injection grooves are provided on the outer surface of each spiral structure; the injection grooves communicate with each other to form an injection channel communicating with the annular recessed space.

[0007] Further, the wire has a pulling extension section extending from the first side to the second side of the support tube; the pulling extension section penetrates through the inside of the support tube.

[0008] Further, the spiral structures of the support tube are bonded together with glue.

[0009] Further, the injection grooves extend along the axial direction of the support tube.

[0010] Furthermore, the power cold-shrinkable sealing tube includes a reinforcing bracket disposed inside the support tube; the reinforcing bracket has an assembled state of axially inserting and mating with the support tube; the reinforcing bracket includes an abutting portion and an elastic telescopic portion; the two abutting portions are relatively spaced apart and abut against the inner wall of the support tube; the elastic telescopic portion is connected between the two abutting portions and has a state of elastically telescoping between the two abutting portions; the abutting portion extends along the length direction of the support tube.

[0011] Furthermore, raised structures extending along the axial direction of the support tube are provided on the inner surface of each turn of the spiral structure; the two raised structures are arranged on both sides in the radial direction of the support tube; the raised structures at corresponding positions on each turn of the spiral structure abut against each other end to end to form a guiding structure; a guiding groove extending along the axial direction of the support tube is provided on the abutting portion corresponding to the guiding structure; the guiding groove and the guiding structure are movably inserted and mated along the axial direction of the support tube.

[0012] Furthermore, the elastic telescopic portion has two ends and a plurality of bending structures provided between the two ends.

[0013] Due to the application of the above technical solutions, the present utility model has the following advantages compared with the prior art:

[0014] 1. By arranging glue injection grooves on each turn of the spiral structure of the support tube, the glue injection grooves on each turn of the bolt structure are connected to form a glue injection channel communicating with the annular concave space. Through this glue injection channel, sealant can be injected into the annular concave space from the outside of the cold-shrinkable sleeve. In this way, the on-site glue injection process is convenient and fast, and the combined action of the cold-shrinkable sleeve and the sealant forms a sealing effect with the cable, reducing the influence of temperature and irregular cable outer diameter on the sealing effect, effectively improving the sealing effect, and having strong practicability.

[0015] 2. By the cooperative use of the reinforcing bracket, the reinforcing bracket is arranged inside the support tube and elastically supports the support tube, so as to improve the support effect of the support tube, effectively prevent the support tube from being deformed under pressure, and the assembly of the reinforcing bracket is convenient and fast, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following further illustrates the technical solutions of the present utility model with reference to the drawings:

[0017] Figure 1 is a three-dimensional structure schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is Figure 1 a sectional view structure schematic diagram of

[0019] Figure 3 is Figure 1 an exploded view of

[0020] Figure 4 This is a three-dimensional structural schematic diagram of the support tube of the present utility model;

[0021] Figure 5 This is a three-dimensional structural schematic diagram of the reinforcing bracket of the present utility model;

[0022] Figure 6 This is an assembly schematic diagram of the reinforcing bracket of the present utility model inside the support tube;

[0023] Wherein: 1, cold shrinkable sleeve; 11, annular recessed space; 2, support tube; 21, glue injection groove; 22, pulling extension section; 23, convex structure; 3, reinforcing bracket; 31, abutting portion; 311, guiding groove; 32, elastic telescopic portion. Detailed implementation mode

[0024] The following combines the accompanying drawings to elaborate on the preferred embodiments of the present utility model, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model.

[0025] As Figures 1-6 Shown is a power cold shrinkable sealing tube described in this embodiment. Through this power cold shrinkable sealing tube, the exposed cable connection joint can be sealed. The power cold shrinkable sealing tube includes a cold shrinkable sleeve 1, a support tube 2 and a reinforcing bracket 3. Among them, the cold shrinkable sleeve 1 is made of conventional materials in the prior art. The cold shrinkable sleeve 1 is a cylindrical structure, and annular recessed spaces 11 are formed at both ends on the inner wall of the cold shrinkable sleeve 1. The annular recessed space 11 can accommodate sealant. The support tube 2 is arranged to penetrate inside the cold shrinkable sleeve 1 to support the expanded cold shrinkable sleeve 1. After the support tube 2 is assembled into the inside of the cold shrinkable sleeve 1, a receiving space for accommodating sealant is formed between the outer wall of the support tube 2 and the annular recessed space 11.

[0026] In this embodiment, the aforementioned support tube 2 is a cylindrical tubular structure formed by continuously winding a wire along a spiral direction. The wire is made of a plastic wire in the prior art and has a designed thickness. The support tube 2 has several interconnected spiral structures. During specific production, the spiral structures of the support tube 2 are bonded together with glue, and when subjected to an external force, the spiral structures can be torn apart from each other. A glue injection groove 21 is processed on the outer surface of each spiral structure. The glue injection groove 21 is an arc-shaped groove and extends along the axial direction of the support tube 2. The glue injection grooves 21 of each spiral structure are connected end to end to form a continuous glue injection channel. Among them, several spiral structures correspond to the annular recessed space 11 so that the formed glue injection channel can communicate with the annular recessed space 11. Through the glue injection channel, sealant can be injected into the annular recessed space 11 from the outside.

[0027] In this embodiment, two groups of glue injection grooves 21 are distributed and processed on the outer surface of each turn of the spiral structure, thereby forming two groups of glue injection channels. Through these two groups of glue injection channels, the sealant can be evenly distributed in the annular recessed space 11.

[0028] The aforementioned wire has a pulling extension section 22 extending from the first side to the second side of the self-supporting tube 2. The pulling extension section 22 is inserted into the interior of the support tube 2. By pulling one end of the pulling extension section 22, each turn of the spiral structure can be sequentially separated from the first side to the second side of the support tube 2, so as to be able to contact the support of the support tube 2 for the cold shrinkable sleeve 1.

[0029] In this embodiment, the aforementioned strengthening bracket 3 is made of plastic. The aforementioned strengthening bracket 3 is arranged inside the support tube 2. The strengthening bracket 3 can be inserted into the support tube 2 along the axial direction of the support tube 2 to have an assembled state of axially inserting and mating with the support tube 2. The strengthening bracket 3 includes an abutting portion 31 and an elastic telescopic portion 32. The two groups of abutting portions 31 are arranged relatively spaced apart. The abutting portion 31 extends along the length direction of the support tube 2 and abuts against the inner wall of the support tube 2. The elastic telescopic portion 32 is connected between the two groups of abutting portions 31 and has a state of elastically telescoping between the two groups of abutting portions 31. The elastic telescopic portion 32 provides an elastic supporting force to enable the abutting portions 31 on both sides to abut against the support tube 2 to support between the support tubes 2. By the contraction of the elastic telescopic portion 32, the relative distance between the abutting portions 31 on both sides can be reduced to facilitate the smooth insertion of the strengthening bracket 3 into the support tube 2. The aforementioned elastic telescopic portion 32 has two ends and a plurality of bending structures formed between the two ends. The abutting portion 31 is fixed at both ends of the elastic telescopic portion. The bending structure is preferably a U-shaped structure, which can extend outward and contract inward under its own structure to form a state of elastic telescoping.

[0030] In the specific structural design, a convex structure 23 extending along the axial direction of the support tube 2 is formed on the inner surface of each turn of the spiral structure of the support tube 2 described above. In this embodiment, the convex structure 23 is arranged corresponding to the glue injection groove 21 described above, and the outer convex surface of the convex structure 23 is the outer bottom surface of the glue injection groove 21. The two groups of convex structures 23 are arranged on both sides in the radial direction of the support tube 2. The convex structures 23 at corresponding positions on each turn of the spiral structure abut against each other end to end to form a continuous guiding structure. A guiding groove 311 extending along the axial direction of the support tube 2 is machined on the abutting portion 31 corresponding to the guiding structure. When the strengthening bracket 3 is inserted into the interior of the support tube 2, the guiding groove 311 is inserted into the guiding structure in a sliding fit along the axial direction of the support tube 2 synchronously. Through the cooperation of the guiding groove 311 and the guiding structure, the rotation of the strengthening bracket 3 inside the support tube 2 can be restricted, and at the same time, it is beneficial for the strengthening bracket 3 to enter and exit the interior of the support tube 2. The strengthening bracket 3 is arranged inside the support tube 2 and elastically supports the support tube 2, so as to improve the support effect of the support tube 2, effectively prevent the support tube 2 from being deformed under pressure, and the assembly of the strengthening bracket 3 is convenient, fast, time-saving and labor-saving.

[0031] During specific assembly, the support tube 2 is inserted into the expanded cold-shrinkable sleeve 1 to support the cold-shrinkable sleeve 1, and then the strengthening bracket 3 is inserted into the cold-shrinkable sleeve 1. The abutting portion 31 of the strengthening bracket 3 abuts against the inner wall of the support tube 2 to elastically support the support tube 2.

[0032] During on-site use, the strengthening bracket 3 is withdrawn, the cable to be sealed is inserted into the support tube 2, and the glue outlet steel needle of the rubber tube storing the sealant is inserted into the glue injection channel to inject the sealant into the annular recessed space 11 through the glue injection channel. According to the overflow situation of the sealant or the amount of glue injection, it is judged whether the sealant meets the injection requirements. After the glue injection is completed, the on-site pulling and extending section 22 is pulled from one end, so that each turn of the spiral structure of the support tube 2 is separated in turn, and then the cold-shrinkable sleeve 1 contracts and fits on the outer wall of the cable. Through the above method, the sealant can be injected into the annular recessed space 11 from the outside of the cold-shrinkable sleeve 1. The on-site glue injection process is convenient and fast. The combined action of the cold-shrinkable sleeve 1 and the sealant forms a sealing effect with the cable, reduces the influence of temperature and irregular cable outer diameter on the sealing effect, effectively improves the sealing effect, and has strong practicability.

[0033] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural or equivalent process transformations made by using the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, are equally included in the patent protection scope of the present invention.

Claims

1. A power cold-shrinkable sealing tube, comprising a cold-shrinkable sleeve and a support tube arranged inside the cold-shrinkable sleeve; characterized in that: Annular recessed spaces are provided at both ends on the inner wall of the cold-shrinkable sleeve; The support tube is a tubular structure formed by continuously winding a wire along a spiral direction, and it has a plurality of interconnected spiral structures; glue injection grooves are provided on the outer surface of each spiral structure; the glue injection grooves communicate with each other to form a glue injection channel communicating with the annular recessed space.

2. The power cold-shrinkable sealing tube according to claim 1, characterized in that: The wire has a pulling and extending section extending from the first side to the second side of the support tube; the pulling and extending section is inserted inside the support tube.

3. The power cold-shrinkable sealing tube according to claim 1, wherein: The spiral structures of each turn of the support tube are bonded together by glue.

4. A power cold-shrink sealing tube according to claim 1, characterized in that: The glue injection grooves extend along the axial direction of the support tube.

5. A power cold-shrink sealing tube according to claim 1, characterized in that: The power cold-shrinkable sealing tube includes a reinforcing bracket arranged inside the support tube; the reinforcing bracket has an assembled state of axially inserting and mating with the support tube; the reinforcing bracket includes an abutting portion and an elastic telescopic portion; two groups of the abutting portions are arranged relatively spaced apart and abut against the inner wall of the support tube; the elastic telescopic portion is connected between the two groups of abutting portions and has a state of elastically telescoping between the two groups of abutting portions; the abutting portion extends along the length direction of the support tube.

6. The electric cold-shrinkable sealing tube according to claim 5, wherein: Protrusion structures extending along the axial direction of the support tube are provided on the inner surface of each spiral structure; two groups of the protrusion structures are arranged on both sides in the radial direction of the support tube; the protrusion structures at corresponding positions on each spiral structure abut against each other end to end to form a guiding structure; guiding grooves extending along the axial direction of the support tube are provided on the abutting portion corresponding to the guiding structure; the guiding grooves are movably inserted and mated with the guiding structure along the axial direction of the support tube.

7. The power cold-shrinkable sealing tube according to claim 5, characterized in that: The elastic telescopic portion has two ends and a plurality of bending structures arranged between the two ends.

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