A heavy cable protection pipe mouth sealing locking device

Abstract

The utility model discloses a heavy -duty cable protection pipe orifice sealing locking device is constituted by split type elastic sealing sleeve and detachable locking assembly, wherein elastic sealing sleeve adopts two symmetrical axial division's half casing structure, has the circular cylindrical inner contour passageway of through axial with truncated cone shape outer contour, and the interference seal is formed to the smaller inside diameter than cable outside diameter. The sleeve outer surface is equipped with annular groove, realizes radial pressure fixed through the locking assembly of throat clamp. Elastic sealing sleeve adopts natural rubber material, and the exposed portion accounts for 1 / 4 of the overall length when installing. The device realizes multiple sealing between cable and protection pipe through the elastic deformation of rubber sleeve, and effectively blocks the invasion of moisture and foreign matters, and the conical structure cooperates with the exposed length to significantly reduce the pulling resistance, and the annular groove and the throat clamp size match to ensure that the locking force is evenly distributed, and the device has the convenience of installation, sealing reliability and maintenance economy, and is especially suitable for the pipe orifice sealing protection of cable bridge lower bending pass.

Description

Technical Field

[0001] This utility model relates to the field of cable protection technology, specifically to a heavy-duty cable protection conduit sealing and locking device. Background Technology

[0002] In the field of underground cable engineering, cable protection conduit openings may experience cable insulation damage due to long-term cable wear, increasing the risk of electric shock. Sealing and protecting cable protection conduit openings has long faced technical challenges. While traditional waterproof tape sealing methods can achieve basic protection, their material ductility and environmental adaptability have significant drawbacks: gaps easily form between tape layers, allowing liquid penetration; dynamic friction caused by vibration at the conduit-cable contact surface cannot be effectively suppressed; and foreign matter intrusion can easily cause delamination and failure of the adhesive. This sealing method not only fails to meet the long-term sealing requirements of complex underground conditions but also leads to mechanical wear of the cable insulation layer at the conduit opening, significantly increasing the risk of breakdown. Furthermore, adhesive residue may remain during later maintenance, making cleanup and extraction difficult. Summary of the Invention

[0003] To address the problems existing in the background art, the present invention adopts the following technical solution:

[0004] A heavy-duty cable protection conduit sealing and locking device is characterized by comprising a split elastic sealing sleeve and a detachable locking assembly; the elastic sealing sleeve is composed of two symmetrically divided axially segmented half-shells, the elastic sealing sleeve having an overall truncated conical outer contour and a cylindrical inner contour channel penetrating the axial direction, the outer surface of the elastic sealing sleeve having a plurality of annular grooves spaced axially along the circumferential direction, the detachable locking assembly locking the two half-shells between the outer surface of the cable and the inner wall of the protection conduit through the annular grooves; the elastic sealing sleeve is embedded into the protection conduit opening by radial pressure contraction deformation of the detachable locking assembly, and forms an interference-sealed interface with the cable surface; the elastic sealing sleeve is made of natural rubber.

[0005] Furthermore, the inner diameter of the cylindrical inner contour channel is 2-5mm smaller than the corresponding outer diameter of the cable, and the exposed portion of the elastic sealing sleeve after being inserted into the cable protection tube accounts for 1 / 4 of the overall length.

[0006] Furthermore, the taper of the truncated cone outer contour is 1:1.1.

[0007] Furthermore, the outer diameter of the upper end face of the elastic sealing sleeve is 30mm, the outer diameter of the lower end face is 55mm, and the overall length is 50mm.

[0008] Furthermore, the number of annular grooves is two.

[0009] Furthermore, the detachable locking component is a hose clamp, the width of which is slightly smaller than the width of the annular groove, and the diameter adjustment range of the hose clamp covers the maximum outer diameter of the truncated cone outer surface of the elastic sealing sleeve.

[0010] Furthermore, the width of the annular groove is 13mm and the depth is 5mm; the width of the hose clamp is 12mm.

[0011] This utility model device can be applied to the connection between the cable and the protective pipe at the bend under the cable tray. After use, it can seal the cable at the opening of the protective pipe, preventing the cable from being damaged due to frequent friction between the cable and the protective pipe opening. It also prevents the cable from being difficult to pull out of the protective pipe when it is removed from the underground cable. It can also prevent foreign objects from entering the protective pipe and damaging the cable, causing leakage. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the elastic sealing sleeve structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the elastic sealing sleeve of this utility model after the cable is inserted;

[0014] Explanation of reference numerals in the attached drawings: 1. Rubber sealing sleeve; 1-1, 1-2 Half-shell; 2. Annular groove; 3. Cable. Detailed Implementation

[0015] The structure, working principle, and effects of this utility model will be further explained below with reference to the accompanying drawings.

[0016] like Figures 1 to 2 As shown, this utility model discloses a heavy-duty cable protection conduit sealing and locking device. Its core structure includes a sealing sleeve 1 made of natural rubber. This rubber sealing sleeve consists of two symmetrically divided half-shells along the axial direction, facilitating quick assembly when wrapping cables. The center of the rubber sealing sleeve 1 has a cylindrical space extending through the axial direction. The inner diameter of this cylindrical space is 2-5mm smaller than the corresponding cable's outer diameter. For example, for a YJV-325+216 cable with an outer diameter of 25.3mm, the bottom diameter of the cylindrical space is designed to be 25mm. The rubber's elastic deformation achieves a tight fit with the cable surface, forming an initial seal. The outer surface of the rubber sealing sleeve 1 has two annular grooves 2, each 13mm wide and 5mm deep. A hose clamp assembly with a width of 12mm is installed within each annular groove 2. The diameter of the hose clamp assembly is adjustable from 27-51mm to accommodate locking requirements of different conduit diameters. The rubber sealing sleeve 1 is designed with an outer diameter of 30mm on the upper end face, an outer diameter of 55mm on the lower end face, and an overall length of 50mm. After the protective tube is inserted, the exposed part accounts for 1 / 4 of the overall height, which ensures the sealing depth and avoids the difficulty of disassembly caused by completely sinking into the tube opening.

[0017] Taking the use of a DN50 galvanized steel pipe and a YJV-325+216 cable as an example: First, the two half-shells 1-1 and 1-2 of the divided rubber sealing sleeve are wrapped around the surface of the cable 3, so that the cylindrical space tightly wraps the cable. At this time, the small end face of the rubber sealing sleeve 1 faces the direction of the protective pipe opening. Then, the hose clamp assembly is embedded in the annular groove 2. By adjusting the bolts of the hose clamp, its diameter is gradually tightened from 51mm to 27mm, forcing the rubber sealing sleeve to contract radially, thereby forming a sealing interface on the cable surface. After locking, the assembled rubber sealing sleeve 1 is pressed axially into the galvanized steel pipe opening from the side with the smaller outer diameter until the exposed part reaches a height of 12.5mm (i.e., 1 / 4 of the total height). In this state, the exposed rubber sealing sleeve part can be used as a force fulcrum for later removal. Combined with its truncated cone structure design, it is easy to pull out from the cable protection pipe opening.

[0018] The beneficial effects of this device are as follows: it forms a seal on the cable surface through the elastic deformation characteristics of natural rubber, effectively preventing the intrusion of moisture and foreign objects; the truncated conical outer contour combined with the 1 / 4 exposed length design significantly reduces the frictional resistance when the cable protection tube is pulled outward from the sealed sleeve; the size matching design of the annular groove and the hose clamp assembly ensures both the uniform distribution of locking force and the prevention of plastic deformation of the rubber body under long-term pressure. The overall solution takes into account the convenience of installation, the reliability of sealing, and the economy of maintenance.

[0019] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or substitute or modify some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heavy-duty cable protection conduit sealing and locking device, characterized in that, The device includes a split-type elastic sealing sleeve and a detachable locking assembly. The elastic sealing sleeve consists of two symmetrical, axially divided half-shells. The elastic sealing sleeve has a truncated conical outer contour and a cylindrical inner contour channel that runs through the axial direction. The outer surface of the elastic sealing sleeve has several annular grooves spaced axially along its circumferential direction. The detachable locking assembly locks the two half-shells between the outer surface of the cable and the inner wall of the protective tube through the annular grooves. The elastic sealing sleeve is embedded into the opening of the protective tube by radial pressure contraction deformation of the detachable locking assembly, forming an interference-fit sealing interface with the cable surface. The elastic sealing sleeve is made of natural rubber.

2. The heavy-duty cable protection conduit sealing and locking device according to claim 1, characterized in that, The inner diameter of the cylindrical inner contour channel is 2-5mm smaller than the corresponding outer diameter of the cable, and the exposed part of the elastic sealing sleeve after being inserted into the cable protection tube accounts for 1 / 4 of the overall length.

3. The heavy-duty cable protection conduit sealing and locking device according to claim 1, characterized in that, The taper of the truncated cone outer contour is 1:1.

1.

4. The heavy-duty cable protection conduit sealing and locking device according to claim 3, characterized in that, The outer diameter of the upper end face of the elastic sealing sleeve is 30mm, the outer diameter of the lower end face is 55mm, and the overall length is 50mm.

5. The heavy-duty cable protection conduit sealing and locking device according to any one of claims 1-4, characterized in that, The number of annular grooves is two.

6. The heavy-duty cable protection conduit sealing and locking device according to claim 1, characterized in that, The detachable locking component is a hose clamp, the width of which is slightly smaller than the width of the annular groove, and the diameter adjustment range of the hose clamp covers the maximum outer diameter of the truncated conical outer contour of the elastic sealing sleeve.

7. The heavy-duty cable protection conduit sealing and locking device according to claim 6, characterized in that, The annular groove has a width of 13mm and a depth of 5mm; the hose clamp has a width of 12mm.

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