CN-122000827-A - Mechanically-driven double-margin sealing waterproof cable accessory and construction method thereof

CN122000827ACN 122000827 ACN122000827 ACN 122000827ACN-122000827-A

Abstract

The invention provides a mechanical driving double-margin sealing waterproof cable accessory and a construction method thereof, and relates to the technical field of cable intermediate connectors; the waterproof cable is characterized by further comprising two sleeve sealing assemblies, wherein the two sleeve sealing assemblies are respectively sealed at the ends of the first waterproof sleeve and the second waterproof sleeve, each sleeve sealing assembly comprises a screw pipe, a nut, a clamping jaw and a rubber block, one end of the screw pipe penetrates through the end, far away from the second waterproof sleeve, of the first waterproof sleeve or the end, far away from the first waterproof sleeve, of the second waterproof sleeve, the nut is in threaded fit with the peripheral surface of the screw pipe, the clamping jaw is fixedly connected to the end, extending out of the first waterproof sleeve or the second waterproof sleeve, of the screw pipe, the rubber block is embedded into the inner side of the clamping jaw, and the peripheral surface of the rubber block is attached to the inner wall of the clamping jaw.

Inventors

QIAO PIFAN
MA YUHUI
FU QING
GENG HAIQIANG
FANG LIHUA
LANG WEI
YU ZIJIANG
Xi jiahui
ZHANG DAWEI
YU JINLIANG
DOU WEI
JI WENYU
LIU NAIHAO
JIANG YANGANG
GENG WEISHUAI
WEI LIKUN
CAO GUANGJIN
WANG YONGXIA
YU XIN
ZHANG LEI
YOU WENHAO
MA XIANHUI
CAO HUAMING
YAO WENZHAN
XIE WEIZENG
Teng Zupeng
YANG GUOLIN
WU JINYU
DAI XIANGBO
PEI GUOLIANG
MA JUNPENG
ZHANG BAIZONG
DING ZHI

Assignees

国网山东省电力公司潍坊供电公司

Dates

Publication Date: 20260508
Application Date: 20260119

Claims (10)

1. The mechanical driving double-margin sealing waterproof cable accessory comprises a pressing component, a first waterproof sleeve (1) and a second waterproof sleeve (2), wherein the pressing component is arranged at the joint of a cable (3), the first waterproof sleeve (1) and the second waterproof sleeve (2) are sleeved outside the cable (3) and are positioned at the outer side of the pressing component, and one end of the first waterproof sleeve (1) is in sealing connection with one end of the second waterproof sleeve (2); The waterproof cable is characterized by further comprising two sleeve sealing assemblies, wherein the two sleeve sealing assemblies are respectively sealed at the end part of the first waterproof sleeve (1) far away from the second waterproof sleeve (2) and the end part of the second waterproof sleeve (2) far away from the first waterproof sleeve (1) and are sleeved on the periphery of the cable (3); Each sleeve sealing assembly comprises a screw tube (4), a nut (5), a clamping jaw (6) and a rubber block (7), wherein the screw tube (4) is sleeved on the periphery of the cable (3), one end of the screw tube penetrates through the end portion, far away from the second waterproof sleeve (2), of the first waterproof sleeve (1) or the end portion, far away from the first waterproof sleeve (1), of the second waterproof sleeve (2), the nut (5) is in threaded fit with the periphery of the screw tube (4), the clamping jaw (6) is fixedly connected to one end, extending out of the first waterproof sleeve (1) or the second waterproof sleeve (2), of the screw tube (4) and is in a horn mouth shape and expands in a direction far away from the screw tube (4), the rubber block (7) is embedded into the inner side of the clamping jaw (6) and is sleeved on the periphery of the cable (3), and the periphery of the rubber block (7) is attached to the inner wall of the clamping jaw (6).
2. The mechanically driven double-margin sealed waterproof cable accessory according to claim 1, wherein the sheathing assembly further comprises a sealing gasket (8), wherein the sealing gasket (8) is sheathed on the periphery of one end of the claw (6) close to the screw tube (4) and is clamped between the claw (6) and the first waterproof sleeve (1) or the second waterproof sleeve (2).
3. The mechanically driven double-margin sealed waterproof cable accessory according to claim 2, further comprising a sealing ring a (9), wherein the sealing ring a (9) is sleeved on the periphery of the screw tube (4) and is respectively clamped between the nut (5) and the end face of the first waterproof sleeve (1) or the second waterproof sleeve (2).
4. The mechanically driven double-margin sealed waterproof cable accessory according to claim 1, wherein the claw (6) comprises a plurality of strip-shaped claws (601) uniformly distributed along the circumferential direction, a gap is arranged between two adjacent strip-shaped claws (601), and the strip-shaped claws (601) are made of elastic metal materials.
5. The mechanically driven double-margin sealed waterproof cable accessory according to any one of claims 1 to 4, wherein the compression assembly comprises a reinforcing sleeve (10), two threaded sleeves (11) and two elastic compression blocks (12), wherein the reinforcing sleeve (10) is sleeved outside a joint of the cable (3), external threads are arranged on the outer wall of the reinforcing sleeve, the inner wall of the reinforcing sleeve is a conical surface with the diameter gradually reduced from outside to inside, the two threaded sleeves (11) are respectively in threaded fit with the external threads on two ends of the reinforcing sleeve (10), the two elastic compression blocks (12) are respectively sleeved on the outer periphery of the cable (3) on two ends of the reinforcing sleeve (10), the outer wall of the elastic compression blocks (12) is a conical surface matched with the inner wall of the reinforcing sleeve (10), and the large head end of each elastic compression block (12) is positioned outside the reinforcing sleeve (10) and is abutted against the inner end surface of the threaded sleeve (11).
6. The mechanically driven double-margin sealed waterproof cable accessory according to claim 5, wherein the elastic compression block (12) is made of rubber.
7. The mechanically driven double-margin sealed waterproof cable accessory according to claim 6, wherein a cylindrical cavity is arranged inside the elastic compression block (12), and a chamfer is arranged at the opening of the cavity close to the big end of the elastic compression block (12).
8. The mechanical driving double-margin sealing waterproof cable accessory according to claim 1, wherein an external thread is arranged at one end of the first waterproof sleeve (1) close to the second waterproof sleeve (2), an internal thread is arranged at one end of the second waterproof sleeve (2) close to the first waterproof sleeve (1), the external thread of the first waterproof sleeve (1) is in threaded fit with the internal thread of the second waterproof sleeve (2), and a sealing ring B (13) is arranged between the end surface of the first waterproof sleeve (1) close to the second waterproof sleeve (2) and the second waterproof sleeve (2).
9. A construction method of a mechanically driven double-margin sealed waterproof cable accessory, characterized in that the mechanically driven double-margin sealed waterproof cable accessory according to any one of claims 1 to 8 is adopted, comprising the steps of: Step 1, sleeving the first waterproof sleeve (1), the second waterproof sleeve (2), two sleeve sealing assemblies, a reinforcing sleeve (10), two elastic compression blocks (12) and two threaded sleeves (11) into the end parts of two sections of cables (3) to be connected correspondingly, wherein all the components are arranged in a non-butt joint area of the cables (3); Step 2, stripping insulation layers at the end parts of the two sections of cables (3) and finishing core wire butt joint, and insulating and protecting the connection part of the cables (3) by winding an insulating adhesive tape; Step 3, moving the reinforcing sleeve (10) to completely cover the joint of the cable (3), embedding two elastic compression blocks (12) from two ends of the reinforcing sleeve (10) respectively, enabling conical surfaces of the elastic compression blocks (12) to be attached to the inner wall of the reinforcing sleeve (10), screwing two threaded sleeves (11) into two ends of the reinforcing sleeve (10) and screwing, and driving the elastic compression blocks (12) to radially shrink to be attached to the cable (3); Step 4, moving the first waterproof sleeve (1) and the second waterproof sleeve (2) to the outer side of the joint of the cable (3), realizing butt joint through threaded fit, and extruding the sealing ring B (13) to form sealing; And 5, adjusting the position of a screw tube (4) of the sleeve sealing assembly, clamping a sealing gasket (8) between a clamping jaw (6) and the end part of the corresponding waterproof sleeve, clamping a sealing ring A (9) between a nut (5) and the end surface of the corresponding waterproof sleeve, tightening the nut (5) to drive the clamping jaw (6) to shrink, and extruding the elastic deformation of a rubber block (7) to be tightly attached to the cable (3), so that integral sealing is completed.
10. The construction method of the mechanically driven double-margin sealed waterproof cable accessory according to claim 9, wherein the step 5 adopts a step sealing operation, namely screwing the nut (5) to the sealing gasket (8) to be attached to the end part of the waterproof sleeve for 20 to 30 seconds, continuing to screw the nut to the strip-shaped claw (601) to generate uniform shrinkage, preliminarily attaching the rubber block (7) to the cable (3), and finally screwing the nut to the preset torque of 8 to 12N M, ensuring that the rubber block (7) has no partial gap, and simultaneously ensuring that the tightening torque of the threaded sleeve (11) in the step 3 is 15 to 20N M, the radial shrinkage of the elastic compression block (12) is 6 to 8 percent of the initial inner diameter of the elastic compression block.

Description

Mechanically-driven double-margin sealing waterproof cable accessory and construction method thereof Technical Field The invention relates to the technical field of cable intermediate connectors, in particular to a mechanical driving double-margin sealing waterproof cable accessory and a construction method thereof. Background The cable intermediate head is a key component for connecting segmented cables in the fields of power transmission and communication, is widely used in scenes such as underground pipe networks and outdoor base stations, the waterproof performance of the cable intermediate head directly influences the reliability of the cable, the insulation layer breakdown and the conductor corrosion can be caused by waterproof failure, short circuit or communication interruption is caused, and the existing waterproof scheme still has an optimization space. The Chinese patent publication No. CN220797785U discloses a waterproof mechanism for a middle joint of a high-voltage cable, which comprises a waterproof sleeve I and a waterproof sleeve II which are in butt joint with each other. The waterproof sleeve I and the waterproof sleeve II are internally provided with a reinforcing component for fixing cables, and the butt joint part is provided with a rubber sealing gasket. The waterproof sleeve is characterized in that the sealing of the left end and the right end of the waterproof sleeve depends on a heat-shrinkable sealing ring and a sliding reinforcing sleeve ring, the sliding reinforcing sleeve ring is sleeved on the periphery of the cable, and the heat-shrinkable sealing ring can shrink by the aid of the temperature of the surface of the high-voltage cable, so that the cable is tightly attached to the heat-shrinkable sealing ring. The prior art still has the following defects that the heat-shrinkable sealing ring needs to shrink depending on the operation temperature of the cable, the cable does not generate heat in the initial stage of installation, the sealing ring cannot shrink in time to be attached to the cable, gaps are easy to form at the end parts, and moisture is easy to invade. Disclosure of Invention The embodiment of the application solves the problems that a heat-shrinkable sealing ring in the prior art needs to shrink depending on the running temperature of a cable, so that the sealing ring cannot shrink and fit the cable in time, gaps are easy to form at the end parts, and moisture is easy to invade. The mechanical driving double-margin sealing waterproof cable accessory comprises a pressing assembly, a first waterproof sleeve, a second waterproof sleeve, two sealing assemblies, a screw, a nut, a clamping jaw and a rubber block, wherein the pressing assembly is arranged at a cable connection position, the first waterproof sleeve and the second waterproof sleeve are sleeved outside a cable and are positioned at the outer side of the pressing assembly, one end of the first waterproof sleeve is in sealing connection with one end of the second waterproof sleeve, the two sealing assemblies are respectively sealed at the end, far away from the second waterproof sleeve, of the first waterproof sleeve, the end, far away from the first waterproof sleeve, of the second waterproof sleeve, and are sleeved on the periphery of the cable, each sealing assembly comprises a screw, a nut, a clamping jaw and a rubber block, the screw is sleeved on the periphery of the cable, one end of the screw penetrates through the end, far away from the second waterproof sleeve, or the end, far away from the first waterproof sleeve, of the nut is in threaded fit with the outer periphery of the screw, the screw is fixedly connected with the end, far away from the waterproof jaw, and is sleeved on the periphery of the inner side of the cable, and is in the shape of the clamping jaw, and is sleeved on the periphery of the inner side of the rubber block, and is in the expansion shape, and is sleeved on the periphery of the inner side of the clamping jaw. Because the waterproof jacket of first, the tip that the waterproof jacket of second kept away from is provided with the cover respectively and seals the subassembly, and every cover seals the subassembly and including the cover locate the cable periphery and run through the screwed pipe that corresponds waterproof jacket tip, with screwed pipe outer peripheral face screw-thread fit's nut, be fixed in screwed pipe stretches out waterproof jacket one end and be the bell mouth form to keeping away from the jack catch of screwed pipe direction expansion, and inlay in the jack catch inboard and cover locate the cable periphery (outer peripheral face and the laminating of jack catch inner wall) rubber piece, consequently, can drive the jack catch shrink and extrude rubber piece elastic deformation in order closely laminating cable periphery through tightening the nut, need not to rely on cable operating temperature to realize sealedly, thereby the pyrocondensation sealing w