A cable end protection sleeve

Abstract

The utility model discloses a cable end protection sleeve, including the outer fixed cover, the outer fixed cover one end is equipped with screw rod formula push -pull subassembly, screw rod formula push -pull subassembly's connecting end fixedly installed have the inner tube, the inner tube is located the open one end with the outer fixed cover between common fixed connection has hollow sealing ring, the outer fixed cover is located the open one end fixed connection has the internal thread cover, the internal thread cover's inside is equipped with a plurality of elastic occlusion piece, in the utility model, through screw rod formula push -pull subassembly drive inner tube compression hollow sealing ring, realize self -adaptation seal, effectively solve the leakage problem that cable outer skin uneven leads, simultaneously, the elastic occlusion piece in the internal thread cover and the taper inclined plane cooperation of movable ring, form the progressive locking structure, ensure that pressure distribution is even, guarantee fixed effect. This design adopts the thread drive mechanism, significantly reduce the installation difficulty, be applicable to big diameter cable, have sealed reliable, convenient operation, strong adaptability etc.

Description

Technical Field

[0001] This utility model relates to the field of cable end protective sleeve technology, and in particular to a cable end protective sleeve. Background Technology

[0002] During cable laying, long-length cables are usually pre-wound onto cable reels. During construction, they are pulled out and cut as needed, creating a new port at the cut point. Since cable cores are often made of metals such as copper and aluminum, improper port protection leading to moisture or water ingress can cause oxidation of the metal conductors, potentially resulting in short circuits, spark discharges, or even insulation breakdown.

[0003] Currently, protective sleeves are commonly used in engineering projects to protect the ends of cables.

[0004] Existing protective sleeves mainly use an interference fit between the rubber inner sleeve and the cable outer sheath for sealing. However, this technology has significant shortcomings: when the cable outer sheath is uneven or scratched due to laying damage, it will lead to poor sealing; although some improved solutions have added annular grooves and flexible ropes to enhance the seal, the uneven pressure distribution when the ropes are tightened may cause local seal failure; in addition, the interference fit structure requires a large installation force, which is especially difficult for large-diameter cables.

[0005] Therefore, improvements are proposed. Utility Model Content

[0006] This utility model is a cable end protective sleeve proposed to overcome the shortcomings of the existing technology.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a cable end protective sleeve, including an outer fixing sleeve, a screw-type push-pull assembly installed at one end of the outer fixing sleeve, an inner cylinder fixedly installed at the connecting end of the screw-type push-pull assembly, and a hollow sealing ring fixedly connected between the inner cylinder at the open end and the outer fixing sleeve.

[0008] The outer fixing sleeve is fixedly connected to an inner threaded sleeve at one end of the opening. The inner side of the inner threaded sleeve is provided with multiple elastic engagement pieces, and the elastic engagement pieces are fixedly connected to the outer fixing sleeve. The outer surfaces of the multiple elastic engagement pieces are jointly fitted with a compression component, and the compression component is threadedly connected to the inner threaded sleeve.

[0009] Furthermore, the screw-type push-pull assembly includes a handwheel, which is located at one end of the outer fixed sleeve. A screw is fixedly connected to one side of the outer surface of the handwheel, and the screw passes through the outer fixed sleeve. A nut is threaded onto the outer surface of the screw, and the nut is fixedly connected to the outer fixed sleeve. This structure achieves adjustment through threaded transmission, reducing the installation force required for operation.

[0010] Furthermore, a T-block is fixedly connected to the end of the screw, and a limit seat is rotatably connected to the outer surface of the T-block. The limit seat is fixedly connected to the inner cylinder. This rotating pair design effectively eliminates off-center load and ensures smooth axial movement of the inner cylinder.

[0011] Furthermore, the extrusion assembly includes a movable ring, which is partially disposed inside the internal threaded sleeve. The outer surface of the movable ring is provided with an external thread, and the external thread and the internal threaded sleeve are connected by a threaded engagement. The threaded engagement makes the pressure adjustment more uniform and avoids local stress concentration.

[0012] Furthermore, multiple auxiliary blocks are uniformly fixedly connected to the outer surface of the movable ring. The auxiliary blocks provide better force application points and facilitate manual tightening.

[0013] Furthermore, the inner surface edge of the movable ring is provided with a tapered slope, and the tapered slope fits into the elastic engagement piece. The tapered structure allows the elastic engagement piece to tighten progressively, ensuring uniform circumferential pressure on the cable sheath.

[0014] Furthermore, all of the aforementioned elastic bite plates are made of spring steel. The high elasticity and fatigue resistance of spring steel enable the elastic bite plates to maintain a stable clamping force over a long period of time.

[0015] The beneficial effects of this utility model are:

[0016] In use, this utility model provides a cable end protective sleeve that uses a screw-type push-pull assembly to drive the inner cylinder to compress the hollow sealing ring, achieving self-adaptive sealing and effectively solving the leakage problem caused by uneven cable sheaths. Simultaneously, the elastic engagement piece inside the threaded sleeve cooperates with the conical inclined surface of the movable ring to form a progressive locking structure, ensuring uniform pressure distribution and guaranteeing a secure hold. This design, employing a threaded drive mechanism, significantly reduces installation difficulty, is suitable for large-diameter cables, and offers advantages such as reliable sealing, convenient operation, and strong adaptability. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 : A perspective view of this utility model;

[0019] Figure 2 : A cross-sectional view of this utility model;

[0020] Figure 3 : A cross-sectional view of the extrusion assembly of this utility model.

[0021] The attached figures are labeled as follows:

[0022] 1. External fixed sleeve; 2. Handwheel; 3. Internal threaded sleeve; 4. Elastic engagement piece; 5. Moving ring; 7. Screw; 8. Nut; 9. Limit seat; 10. T-block; 11. Inner cylinder; 12. Hollow sealing ring; 13. External thread; 14. Conical inclined surface; 15. Auxiliary block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1 to 3 As shown, a cable end protective sleeve is disclosed, comprising an outer fixing sleeve 1, a screw-type push-pull assembly installed at one end of the outer fixing sleeve 1, an inner cylinder 11 fixedly installed at the connecting end of the screw-type push-pull assembly, a hollow sealing ring 12 fixedly connected between the inner cylinder 11 at the open end and the outer fixing sleeve 1, the screw-type push-pull assembly including a handwheel 2, the handwheel 2 being disposed at one end of the outer fixing sleeve 1, a screw 7 fixedly connected to one side of the outer surface of the handwheel 2, the screw 7 penetrating the outer fixing sleeve 1, a nut 8 threadedly fitted onto the outer surface of the screw 7, the nut 8 being fixedly connected to the outer fixing sleeve 1, a T-block 10 fixedly connected to the end of the screw 7, a limit seat 9 rotatably connected to the outer surface of the T-block 10, and the limit seat 9 being fixedly connected to the inner cylinder 11, the thread helix angle of the screw 7 being less than the friction angle, giving the screw 7 a self-locking capability, which can prevent it from shifting due to vibration or load.

[0025] The outer fixing sleeve 1 is fixedly connected to the inner threaded sleeve 3 at one end of the opening. The inner side of the inner threaded sleeve 3 is provided with multiple elastic biting pieces 4, and the elastic biting pieces 4 are fixedly connected to the outer fixing sleeve 1. The multiple elastic biting pieces 4 are all made of spring steel. In the initial state, the multiple elastic biting pieces 4 made of spring steel are in a naturally open state, with an inner diameter slightly larger than the cable diameter, which facilitates cable insertion. The ends of the elastic biting pieces 4 have anti-slip teeth to ensure the biting effect.

[0026] Multiple elastic engagement pieces 4 have their outer surfaces together fitted with a compression assembly, which is threadedly connected to the inner threaded sleeve 3. The compression assembly includes a movable ring 5, which is partially located inside the inner threaded sleeve 3. The outer surface of the movable ring 5 has an external thread 13, which is threadedly engaged with the inner threaded sleeve 3. Multiple auxiliary blocks 15 are uniformly fixedly connected to the outer surface of the movable ring 5. The inner surface edge of the movable ring 5 has a tapered bevel 14, which is fitted with the elastic engagement piece 4. The external thread 13 and the inner thread of the inner threaded sleeve 3 adopt a small lead design (thread helix angle less than 5°) to ensure reliable self-locking performance under vibration conditions.

[0027] Working principle: First, the inner cylinder 11 is placed on the end of the cable. The handwheel 2 is rotated to drive the screw 7 to rotate. Since the screw 7 is threadedly engaged with the fixing nut 8, the screw 7 moves axially, pushing the T-block 10 and the limit seat 9, which in turn drives the inner cylinder 11 to move towards the inner thread sleeve 3. The displacement of the inner cylinder 11 squeezes the hollow sealing ring 12, causing it to expand radially and tightly fit the outer surface of the cable, forming an axial dynamic seal to prevent water vapor and dust from entering.

[0028] Next, by rotating the movable ring 5 through the auxiliary block 15, it is screwed into the inner thread sleeve 3. The tapered inclined surface 14 gradually presses the elastic engagement piece 4 inward to contract, radially engaging the cable surface to form a mechanical lock.

[0029] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A cable end protection sleeve comprising an outer fixing sleeve (1), characterised in that: One end of the outer fixing sleeve (1) is equipped with a screw-type push-pull assembly, and the connecting end of the screw-type push-pull assembly is fixedly installed with an inner cylinder (11). The inner cylinder (11) is located between the opening end and the outer fixing sleeve (1) and is fixedly connected with a hollow sealing ring (12). The outer fixing sleeve (1) is fixedly connected to an inner threaded sleeve (3) at one end of the opening. The inner side of the inner threaded sleeve (3) is provided with multiple elastic engagement pieces (4), and the elastic engagement pieces (4) are fixedly connected to the outer fixing sleeve (1). The outer surfaces of the multiple elastic engagement pieces (4) are jointly fitted with a compression component, and the compression component is threadedly connected to the inner threaded sleeve (3).

2. A cable end protection sleeve according to claim 1, characterised in that: The screw-type push-pull assembly includes a handwheel (2), which is located at one end of the outer fixing sleeve (1). A screw (7) is fixedly connected to one side of the outer surface of the handwheel (2), and the screw (7) passes through the outer fixing sleeve (1). A nut (8) is threaded onto the outer surface of the screw (7), and the nut (8) is fixedly connected to the outer fixing sleeve (1).

3. A cable end protection sleeve according to claim 2, characterised in that: The end of the screw (7) is fixedly connected to a T-shaped block (10), and the outer surface of the T-shaped block (10) is rotatably connected to a limiting seat (9), and the limiting seat (9) is fixedly connected to the inner cylinder (11).

4. A cable end protection sleeve according to claim 1, characterised in that: The extrusion assembly includes a movable ring (5), and the movable ring (5) is partially disposed inside the inner threaded sleeve (3). The outer surface of the movable ring (5) is provided with an external thread (13), and the external thread (13) and the inner threaded sleeve (3) are threadedly connected.

5. A cable end protection sleeve according to claim 4, characterised in that: Multiple auxiliary blocks (15) are uniformly fixedly connected to the outer surface of the movable ring (5).

6. A cable end protection sleeve according to claim 4, characterised in that: The inner surface edge of the movable ring (5) is provided with a tapered inclined surface (14), and the tapered inclined surface (14) is in contact with the elastic bite piece (4).

7. A cable end protection sleeve according to claim 1, characterized in that: All of the elastic bite plates (4) are made of spring steel.

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