Sheath shrinking and fixing device for cable

Abstract

The utility model belongs to the technical field of cables, and particularly discloses a sheath shrinking and fixing device for a cable. The cable sheath contraction fixing device comprises a fixing rod and a fixing clamp, the fixing clamp is provided with a first fixing piece and at least one second fixing piece, the first fixing piece is provided with a first fixing hole, and the second fixing piece is provided with a connecting structure. A cable can be fixedly arranged in the first fixing hole in a penetrating mode, and the fixing rod can be fixedly connected with the fixing clamp through a connecting structure. According to the sheath shrinking and fixing device for the cable, the anti-shrinking force which is in the axis direction of the cable and is opposite to the shrinking trend direction of the polyethylene sheath can be applied to the polyethylene sheath through the fixing rod and the fixing clamp, so that the effect of relieving and avoiding the shrinking phenomenon is achieved, the cable accessory is prevented from being separated from the cable, and the service life of the cable is prolonged. The waterproof performance of the terminal joint or the intermediate joint of the cable is prevented from being damaged, and the metal shielding layer or the armor layer of the cable can be prevented from being disconnected, thereby greatly improving the electrical safety.

Description

Technical Field

[0001] The utility model relates to the technical field of cable protection, in particular to a sheath shrinking and fixing device for a cable. Background Art

[0002] PE (polyethylene) is a widely used polymer material. In the wire and cable industry, PE is mainly used as a sheath material. During the sheath production process, the extruder relies on the high temperature of the furnace and the shearing of the screw to melt and plasticize the PE particles, and generates pressure through the rotation of the screw to extrude the molten PE out of the mold and coat the cable core. It is then cooled and solidified to form a PE sheath that protects the internal cable core.

[0003] However, there is still a certain amount of shrinkage stress in the polyethylene sheath of the finished cable, so that after a period of installation by the user, the polyethylene sheath will shrink. This shrinkage phenomenon can easily cause the cable accessories to separate from the cable body, affecting the waterproof performance of the terminal connector or intermediate connector of the cable. If the shrinkage is severe, it may even cause the metal shielding layer / armor layer of the cable to be disconnected, affecting the electrical safety performance.

[0004] Based on the above, there is an urgent need for a cable sheath shrinking and fixing device to solve the above technical problems. Utility Model Content

[0005] The utility model aims to provide a cable sheath shrinkage fixing device, which can reduce the safety risks caused by the shrinkage of the polyethylene sheath.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A sheath shrinkage fixing device for a cable comprises: a fixing rod; a fixing clamp, wherein the fixing clamp has a first fixing piece and at least one second fixing piece, the first fixing piece and the second fixing piece are fixedly connected, the first fixing piece has a first fixing hole, and the second fixing piece has a connecting structure; the first fixing hole can be used to fix a cable, the fixing rod can be fixedly connected to the fixing clamp through the connecting structure, and the fixing rod can apply an anti-shrinkage force along the axial direction of the cable and opposite to the shrinkage trend to the polyethylene sheath of the cable through the fixing clamp.

[0008] Preferably, the first fixing member is an integrally formed member, the integrally formed member is provided with the first fixing hole, and the first fixing member can be sleeved on the cable and fixed on the cable.

[0009] Preferably, the first fixing member is a split assembly member, and the split assembly member includes at least two split fixing members, and the split fixing members can be fixedly connected and define the first fixing hole to clamp and fix the cable.

[0010] Preferably, a protective pad is provided on the inner wall of the first fixing hole, and the protective pad is used to prevent the polyethylene sheath from being damaged.

[0011] Preferably, the connection structure is a threaded hole, the fixing rod has an external thread, and the fixing rod can be fixedly connected to the fixing clamp through the connection structure.

[0012] Preferably, the cable sheath shrinking and fixing device further comprises a fastening nut, which can be threadedly connected to the fixing rod and abut against the second fixing piece along the axial direction of the fixing rod.

[0013] Preferably, the connecting structure includes a first clamping end, a second clamping end and a fixing bolt, the first clamping end and the second clamping end are spaced apart, the fixing rod can be arranged between the first clamping end and the second clamping end, and the fixing bolt can pass through the first clamping end and be fixedly connected to the second clamping end so that the fixing rod is clamped and fixed between the first clamping end and the second clamping end.

[0014] Preferably, the first fixing member is fixedly connected to at least two of the second fixing members, and the at least two second fixing members are evenly arranged around the circumferential direction of the first fixing member. The cable sheath shrinkage fixing device includes at least two fixing rods, and each of the second fixing members is correspondingly connected to one fixing rod.

[0015] Preferably, the cable sheath shrinkage fixing device is arranged at the middle joint of the two cables, and at least one fixing clip is arranged on both sides of the middle joint, and at least two fixing clips located on both sides of the middle joint are fixedly connected by the fixing rod.

[0016] Preferably, the cable sheath shrinkage fixing device is arranged at the terminal joint of the cable, at least one fixing clip is fixedly mounted on the cable, the fixing clip is fixedly connected to the fixing rod, and the fixing rod is fixedly connected to the cable connecting device or the cable fixing device.

[0017] The beneficial effects of the utility model are as follows: through the above-mentioned cable sheath shrinkage fixing device, an anti-shrinkage force can be applied to the polyethylene sheath along the axial direction of the cable and in the opposite direction to the shrinkage trend of the polyethylene sheath through the fixing rod and the fixing clamp, thereby playing the effect of slowing down and avoiding the shrinkage phenomenon, thereby preventing the cable accessories from detaching from the cable, avoiding damage to the waterproof performance of the terminal joint or the intermediate joint of the cable, and avoiding the disconnection of the metal shielding layer or the armor layer of the cable, thereby greatly improving electrical safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cable sheath shrinking and fixing device in the utility model when it is used for an intermediate joint;

[0019] Figure 2 It is a structural schematic diagram of a sheath shrinking and fixing device for a cable provided by the utility model;

[0020] Figure 3 It is a structural schematic diagram of another cable sheath shrinking and fixing device provided by the utility model;

[0021] Figure 4 It is a schematic diagram of the cable sheath shrinking and fixing device in the utility model when it is used for a terminal joint.

[0022] In the figure:

[0023] 1. Cable; 11. Intermediate connector;

[0024] 2. Fixing rod;

[0025] 3. Fixing clamp; 31. First fixing piece; 311. Split fixing piece; 312. Protective pad; 32. Second fixing piece; 321. First clamping end; 322. Second clamping end; 323. Fixing bolt; 33. Fastening nut; 4. Cable connecting device. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0027] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0029] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0030] The following is based on the attached Figure 1 To Attachment Figure 4 The utility model introduces a cable sheath shrinking and fixing device.

[0031] refer to Figure 1 , Figure 2As shown, in this embodiment, the cable sheath shrinkage fixing device mainly includes a fixing rod 2 and a fixing clamp 3. The fixing clamp 3 includes a first fixing member 31 and at least one second fixing member 32, and the first fixing member 31 and the second fixing member 32 are fixedly connected. The first fixing member 31 has a first fixing hole, and the second fixing hole has a connecting structure. When in use, the cable 1 can be fixedly passed through the first fixing hole, so that the cable 1 and the first fixing member 31 are fixedly connected. The fixing rod 2 can be fixedly connected with the second fixing member 32 through the connecting structure. At this time, the fixing rod 2 can apply an anti-contraction force to the polyethylene sheath of the cable 1 through the second fixing member 32 and the first fixing member 31. The anti-contraction force is applied to the polyethylene sheath along the axial direction of the cable 1, and is opposite to the shrinkage trend direction of the polyethylene sheath, thereby forming a "pulling force" on the polyethylene sheath, which can effectively counteract its inherent shrinkage phenomenon.

[0032] By means of the above-mentioned cable sheath shrinkage fixing device, an anti-shrinkage force can be applied to the polyethylene sheath along the axial direction of the cable 1 and in the opposite direction to the shrinkage trend of the polyethylene sheath through the fixing rod 2 and the fixing clamp 3, thereby playing the effect of slowing down and avoiding the shrinkage phenomenon, thereby preventing the cable accessories from detaching from the cable 1, avoiding damage to the waterproof performance of the terminal joint or the intermediate joint 11 of the cable 1, and avoiding the metal shielding layer or armor layer of the cable 1 from being broken, thereby greatly improving electrical safety.

[0033] Alternatively, if Figure 1 , Figure 2 As shown, in this embodiment, the first fixing member 31 is an annular integrally formed member ( Figure 1 The one-piece molded part is provided with a first fixing hole. When in use, the first fixing part 31 can be subjected to a cold shrink treatment to increase the inner diameter of the first fixing hole, and then the first fixing part 31 can be sleeved on the cable 1 from the joint of the cable 1. When the temperature of the first fixing part 31 returns to room temperature, it can be fixed on the cable 1. The one-piece molded part has a high structural strength, is not easy to loosen, and has a low manufacturing cost, which can greatly reduce the manufacturing cost of the sheath shrinking fixing device for the cable.

[0034] Alternatively, if Figure 1 , Figure 3 As shown, the first fixing member 31 may also be a split assembly member ( Figure 1 In the present embodiment, the first fixing member 31 includes two split fixing members 311, which can be fixedly connected to form an annular structure, thereby defining the above-mentioned first fixing hole. When in use, compared with the one-piece molded part, the split assembly does not need to be subjected to cold shrinkage treatment, nor does it need to be slidably installed from the joint of the cable 1, which can simplify the installation and facilitate multiple adjustments to the installation position of the fixing clamp 3.

[0035] Specifically, refer to Figure 1 , Figure 3 As shown, one of the two split fixing members 311 is provided with a threaded hole, and the other is provided with a through hole, and the two split fixing members 311 can be fixedly connected by bolts. Of course, in some other embodiments, at least two split fixing members 311 can also be fixedly connected by means of buckles, clamps, etc., and the connection method and the number of split fixing members 311 are not specifically limited in the present invention.

[0036] Further, refer to Figure 2 , Figure 3 As shown, in this embodiment, the inner wall of the first fixing hole is provided with a protective pad 312, and the protective pad 312 is used to prevent the polyethylene sheath from being damaged. Preferably, the protective pad 312 is made of rubber, which not only prevents the cable 1 from being crushed, but also has an anti-slip effect, thereby preventing the fixing clamp 3 and the cable 1 from sliding relative to each other and failing to achieve an anti-contraction effect.

[0037] like Figure 1 , Figure 2 As shown, in this embodiment, the second fixing member 32 is integrally formed with the first fixing member 31. The connection structure adopts a threaded hole, and the fixing rod 2 has an external thread. By passing through the threaded hole, the fixing rod 2 can be fixedly connected with the second fixing member 32, the first fixing member 31 and the polyethylene sheath by threaded connection, thereby applying the above-mentioned anti-contraction force to the polyethylene sheath.

[0038] Continue to refer to Figure 1 As shown, in this embodiment, the cable sheath shrinking fixing device further includes a fastening nut 33, which can be threadedly connected to the fixing rod 2 and abut against the second fixing member 32 along the axial direction of the fixing rod 2, thereby further improving the connection stability between the fixing rod 2 and the second fixing member 32. Preferably, a fastening nut 33 is provided on both sides of the second fixing member 32, and the fastening nut 33 abuts against the second fixing member 32, thereby locking the second fixing member 32 and the fixing rod 2.

[0039] Optionally, refer to Figure 1 , Figure 3As shown, in some embodiments, the connection structure includes a first clamping end 321, a second clamping end 322 and a fixing bolt 323. The first clamping end 321 and the second clamping end 322 are arranged at intervals. The fixing rod 2 can be arranged between the first clamping end 321 and the second clamping end 322. The fixing bolt 323 can pass through the first clamping end 321 and be fixedly connected to the second clamping end 322, so that the fixing rod 2 is clamped and fixed between the first clamping end 321 and the second clamping end 322. By adjusting the fixing bolt 323, the spacing between the first clamping end 321 and the second clamping end 322 changes from being larger than the diameter of the fixing rod 2 to being equal to or smaller than the diameter of the fixing rod 2, so that the fixing rod 2 can be clamped and fixed.

[0040] Preferably, in this embodiment, the first fixing member 31 is fixedly connected to at least two second fixing members 32, and the at least two second fixing members 32 are evenly arranged around the circumferential direction of the first fixing member 31, for example, the two second fixing members 32 are arranged at an interval of 180°. The cable sheath shrinkage fixing device includes at least two fixing rods 2, and each second fixing member 32 is correspondingly connected to a fixing rod 2. Through the uniform arrangement, the anti-shrinkage force can be evenly applied to the polyethylene sheath in the circumference of the cable 1, avoiding local damage and tearing caused by excessive local force.

[0041] like Figure 1 As shown, in this embodiment, the cable sheath shrinkage fixing device is arranged at the middle joint 11 of the two cables 1, and a fixing clamp 3 is arranged on both sides of the middle joint 11, and the two fixing clamps 3 located on both sides of the middle joint 11 are provided with two second fixing members 32. The cable sheath shrinkage fixing device includes two fixing rods 2, and the two fixing frames are fixedly connected by the two fixing rods 2, so as to play the effect of resisting the shrinkage of the polyethylene sheath. Of course, in some other embodiments, more fixing clamps 3 can be arranged on either side of the middle joint 11, and the fixing rod 2 can be extended to fix and connect more fixing clamps 3, which also belongs to the scope of protection of the utility model.

[0042] like Figure 4 As shown, in another embodiment, a cable sheath shrinkage fixing device is provided at the terminal joint of the cable 1. At least one fixing clamp 3 is fixedly mounted on the cable 1, the fixing clamp 3 is fixedly connected to a fixing rod 2, and the fixing rod 2 is fixedly connected to a cable connection device 4 or a cable fixing device. Specifically, the cable connection device 4 is, for example, an electrical cabinet, one end of the fixing rod 2 is welded to the electrical cabinet, and the other end is fixedly connected to the fixing clamp 3. The cable fixing device is, for example, a wall, a column, etc., which can also fix one end of the fixing rod 2. The other end of the fixing rod 2 can be fixedly connected to the fixing clamp 3, so that the fixing clamp 3 applies an anti-shrinkage force to the cable 1, thereby playing the effect of slowing down and avoiding the shrinkage of the polyethylene sheath.

[0043] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A sheath shrinking and fixing device for a cable, characterized in that: include: Fixing rod (2); A fixing clamp (3), the fixing clamp (3) comprising a first fixing member (31) and at least one second fixing member (32), the first fixing member (31) and the second fixing member (32) being fixedly connected, the first fixing member (31) having a first fixing hole, and the second fixing member (32) having a connecting structure; The cable (1) can be fixedly inserted into the first fixing hole, the fixing rod (2) can be fixedly connected to the fixing clamp (3) via the connecting structure, and the fixing rod (2) can apply an anti-contraction force along the axial direction of the cable (1) and opposite to the contraction trend to the polyethylene sheath of the cable (1) via the fixing clamp (3).

2. The cable sheath shrinking and fixing device according to claim 1, characterized in that: The first fixing member (31) is an integrally formed member, the integrally formed member is provided with the first fixing hole, and the first fixing member (31) can be sleeved on the cable (1) and fixed on the cable (1).

3. The cable sheath shrinking and fixing device according to claim 1, characterized in that: The first fixing member (31) is a split assembly, and the split assembly comprises at least two split fixing members (311). The split fixing members (311) can be fixedly connected and define the first fixing hole to clamp and fix the cable (1).

4. The cable sheath shrinking and fixing device according to claim 2 or 3, characterized in that: A protective pad (312) is provided on the inner wall of the first fixing hole, and the protective pad (312) is used to prevent the polyethylene sheath from being damaged.

5. The cable sheath shrinking and fixing device according to claim 1, characterized in that: The connection structure is a threaded hole, the fixing rod (2) has an external thread, and the fixing rod (2) can be fixedly connected to the fixing clamp (3) through the connection structure.

6. The cable sheath shrinking and fixing device according to claim 5, characterized in that: The cable sheath shrinking and fixing device also includes a fastening nut (33), which can be threadedly connected to the fixing rod (2) and abut against the second fixing member (32) along the axial direction of the fixing rod (2).

7. The cable sheath shrinking and fixing device according to claim 1, characterized in that: The connection structure comprises a first clamping end (321), a second clamping end (322) and a fixing bolt (323); the first clamping end (321) and the second clamping end (322) are arranged at intervals; the fixing rod (2) can be arranged between the first clamping end (321) and the second clamping end (322); the fixing bolt (323) can pass through the first clamping end (321) and be fixedly connected to the second clamping end (322), so that the fixing rod (2) is clamped and fixed between the first clamping end (321) and the second clamping end (322).

8. The cable sheath shrinking and fixing device according to claim 5 or 7, characterized in that: The first fixing member (31) is fixedly connected to at least two of the second fixing members (32), and the at least two of the second fixing members (32) are evenly arranged around the circumferential direction of the first fixing member (31). The cable sheath shrinkage fixing device comprises at least two fixing rods (2), and each of the second fixing members (32) is correspondingly connected to one of the fixing rods (2).

9. The cable sheath shrinking and fixing device according to claim 8, characterized in that: The cable sheath shrinking and fixing device is arranged at the middle joint (11) of the two cables (1), and at least one fixing clamp (3) is arranged on both sides of the middle joint (11), and at least two fixing clamps (3) located on both sides of the middle joint (11) are fixedly connected by the fixing rod (2).

10. The cable sheath shrinking and fixing device according to claim 8, characterized in that: The cable sheath shrinking and fixing device is arranged at the terminal joint of the cable (1); at least one fixing clamp (3) is sleeved and fixed on the cable (1); the fixing clamp (3) is fixedly connected to the fixing rod (2); and the fixing rod (2) is fixedly connected to a cable connecting device (4) or a cable fixing device.

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