CN112615341A

CN112615341A - Power cable sealing device

Info

Publication number: CN112615341A
Application number: CN202011604561.4A
Authority: CN
Inventors: 黄春婧
Original assignee: Individual
Current assignee: Super High Voltage Co Of State Grid Hubei Electric Power Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-04-06
Anticipated expiration: 2040-12-30
Also published as: CN112615341B

Abstract

The invention discloses a power cable sealing device, which relates to the technical field of power fittings and comprises two packaging shells, wherein the two packaging shells are fixedly connected through a plurality of connecting bolts, an inflation valve port is fixedly installed on one packaging shell, the inflation valve port is connected with two air guide pipes, the air guide pipes are connected with sealing sleeves, and the sealing sleeves are embedded in embedded steel rings. When the valve port of aerifing is opened, the inside negative pressure state of gomphosis steel pipe and inflation facing is relieved, thereby make the inflation facing to the pressure reduction of gasbag, lead to the connecting seat to push down at the resilience force effect of side bow-shaped pole and interior arc rod, be in the stress balance state until side bow-shaped pole and interior arc rod, this design has been avoided sealed glue and has been carried out the operation of shutoff to the clearance, the sealed effect condition different because of using the technology difference to appear has been avoided, convenience and suitability have been improved.

Description

Power cable sealing device

Technical Field

The invention relates to a sealing device, relates to the technical field of power accessories, and particularly relates to a power cable sealing device.

Background

The power cable is used for transmitting and distributing electric energy, and is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and power transmission lines under river-crossing seawater.

In the prior art, in the process of laying a power cable, a cable connector is required to be used for connecting two sections of cables, most of the existing connectors are poor in sealing performance and need to be sealed when being laid in humid and easily-corroded environments such as underground and underwater, most of the existing sealing means are disposable, dismantling and resealing are required during maintenance, the sealing effect is very easily limited by a sealant coating technology, and inconvenience exists.

Disclosure of Invention

The invention provides a power cable sealing device, which aims to provide a reusable sealing structure and solve the problem that repeated packaging is needed during maintenance.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the utility model provides a power cable sealing device, includes the encapsulation shell, the quantity of encapsulation shell is two, two through a plurality of connecting bolt fixed connection between the encapsulation shell, one of them fixed mounting has the valve port of aerifing on the encapsulation shell, the valve port of aerifing is connected with two air ducts, the air duct is connected with the seal cover, the seal cover gomphosis is in the gomphosis steel ring, just the gomphosis of gomphosis steel ring is sealed between two encapsulation shells.

The technical scheme of the invention is further improved as follows: the sealing sleeve comprises an embedded steel pipe, an inner side opening of the embedded steel pipe is connected with an expansion covering surface in a sealing mode, negative pressure air is arranged inside a cavity formed by the embedded steel pipe and the expansion covering surface, a pressurizing assembly is arranged between the inner wall of the expansion covering surface and the inner wall of the embedded steel pipe, an air pipe opening is formed in the side face of the embedded steel pipe, and the air pipe opening is connected with an air guide pipe in a sealing mode.

The technical scheme of the invention is further improved as follows: the pressure boost subassembly includes the seat frame, fixed connection between the lateral surface of seat frame and the inner wall of gomphosis steel pipe, the both sides edge of seat frame all has buckled a plurality of side bow-shaped poles, the side bow-shaped pole is kept away from on the connecting seat, be fixed with the gasbag on the downside of connecting seat, the inside of gasbag is highly-compressed air, the lock joint has interior arc pole on the inboard middle segment of side bow-shaped pole, the fixed welding of the other end of interior arc pole is on the inside wall of seat frame.

The technical scheme of the invention is further improved as follows: the cross section of the seat frame is C-shaped, the seat frame is arc-shaped, the connecting seat is an arc-shaped rail, and the circle center of the seat frame and the circle center of the connecting seat are overlapped.

The technical scheme of the invention is further improved as follows: the inner arc-pulling rods are the same as the side arc-pulling rods in quantity, the inner arc-pulling rods are arc-shaped elastic rods, the elasticity of the inner arc-pulling rods tends to be in a straightening state, and the side arc-pulling rods are arc-shaped elastic rods, and the elasticity of the side arc-pulling rods tends to be in a straightening state.

Due to the adoption of the technical scheme, compared with the prior art, the invention has the technical progress that:

1. the invention provides a power cable sealing device, when an inflation valve port is opened, the internal negative pressure state of an embedded steel pipe and an expansion cover is released, so that the pressure of the expansion cover on an air bag is reduced, a connecting seat is pressed down under the action of the resilience force of a side arched rod and an inner arc rod until the side arched rod and the inner arc rod are in a stress balance state, the internal pressure of the embedded steel pipe and the expansion cover is the same as the outside, the pressure of the air bag is greater than the atmospheric pressure, the pressure applied to the air bag by the connecting seat is uniformly dispersed on each position of the surface of the air bag under the action of aerodynamic characteristics, namely the pressure of each point of the contact surface of the air bag and the expansion cover is the same, the pressure of each point of the contact surface of the expansion cover and the cable is the same, the probability of infiltration caused by different pressures is reduced, and the operation of sealing glue for plugging a gap is avoided by, the situation of different sealing effects caused by the difference of the using process is avoided, and the convenience and the applicability are improved.

2. The invention provides a power cable sealing device, which is characterized in that arc-shaped springback designs and quantity designs of a side arc rod and an inner arc rod are adopted, so that the side arc rod and the inner arc rod can push a connecting seat in the springback process to generate displacement relative to a seat frame, the connecting seat can press an expansion cover through an air bag in the process, the design of pressing the expansion cover on a pressurizing assembly by virtue of negative pressure in advance is used for expanding the integral inner diameter of a sealing sleeve, a cable can pass through the sealing sleeve more easily, the inner part of an embedded steel pipe and the expansion cover can be sucked into a negative pressure state again only through an inflation valve port when maintenance is needed, sealant does not need to be added again in the process, the maintenance cost is reduced, and the environmental protection property is also improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic side sectional view of the present invention;

figure 3 is a cross-sectional view of the sealing sleeve of the present invention;

FIG. 4 is a side cross-sectional view of the boot seal of the present invention;

fig. 5 is a schematic structural diagram of the supercharging assembly of the present invention.

In the figure: 1. a package housing; 2. a connecting bolt; 3. an inflation valve port; 4. an air duct; 5. embedding a steel ring; 6. sealing sleeves;

61. embedding a steel pipe; 62. expanding and covering; 63. a pressurizing assembly; 64. an air pipe opening;

631. a seat frame; 632. a side bow bar; 633. a connecting seat; 634. an air bag; 635. an inner pull arc rod.

Detailed Description

The present invention will be described in further detail with reference to the following examples:

example 1

As shown in fig. 1-2, the present invention provides a power cable sealing device, which comprises a package housing 1, and is characterized in that: the quantity of encapsulation shell 1 is two, 2 fixed connection through a plurality of connecting bolts between two encapsulation shells 1, this design is used for including the cable connector parcel, block external water or earth outside, provide the protection to connector and cable, fixed mounting has the valve port 3 of aerifing on one of them encapsulation shell 1, the valve port 3 of aerifing is connected with two air ducts 4, air duct 4 is connected with

seal cover

6, 6 gomphosis of seal cover are in

gomphosis steel ring

5, and 5 sealed gomphosis of gomphosis steel ring are between two encapsulation shells 1, this design is then for utilizing seal cover 6 to fill the clearance between cable and the gomphosis steel ring 5, and communicate seal cover 6 and outside air through aerifing valve port 3 and air duct 4, control.

Example 2

As shown in fig. 2-4, on the basis of embodiment 2, the present invention provides a technical solution: the sealing sleeve 6 comprises an embedded steel pipe 61, the inner side opening of the embedded steel pipe 61 is connected with an expansion covering surface 62 in a sealing way, negative pressure air is arranged in a cavity formed by the embedded steel pipe 61 and the expansion covering surface 62, the design utilizes the expansion facing 62 to ensure that the volume between the embedded steel pipe 61 and the expansion facing 62 can change along with the change of the internal air pressure, and plays a role of control, a pressurizing assembly 63 is arranged between the inner wall of the expansion facing 62 and the inner wall of the embedded steel pipe 61, the design is used for applying supporting force to the expansion covering surface 62 so that the expansion covering surface can be attached to the cable, the side surface of the embedded steel pipe 61 is provided with an air pipe opening 64, the air pipe opening 64 is connected with the air guide pipe 4 in a sealing way, the design is used for communicating the insides of the embedded steel pipe 61 and the expansion covering 62 with the outside air through the air pipe opening 64, the air guide pipe 4 and the inflation valve port 3, and the internal air pressure of the embedded steel pipe 61 and the expansion covering 62 is convenient to adjust.

Example 3

As shown in fig. 3-5, on the basis of embodiment 1 and embodiment 2, the present invention provides a technical solution: the pressurizing assembly 63 includes a seat frame 631, the outer side surface of the seat frame 631 is fixedly connected with the inner wall of the embedded steel tube 61, a plurality of side arc rods 632 are buckled on both sides of the seat frame 631, the side arc rods 632 are far away from the connecting seat 633, the cross section of the seat frame 631 is C-shaped, the seat frame 631 is in the shape of an arc rail, the connecting seat 633 is in the shape of an arc rail, the center of the seat frame 631 and the center of the connecting seat 633 are overlapped, the side arc rods 632 are arc elastic rods, the side arc rods 632 tend to be in a straight state, the design is used for applying a force tending to be away from each other to the seat frame 631 and the connecting seat 633 by the side arc rods 632, when the expansion cover 62 applies pressure to the connecting seat 633 through the air bag 634, the expansion cover 62 can apply thrust to the expansion cover 62 under the action of the side arc rods 632, so that the expansion cover can be pressed on the surface of the, the inside of the airbag 634 is high-pressure air, which is designed to uniformly transmit the thrust of the connecting seat 633 to the expansion facing 62, wherein the characteristic that the pressures of all points in the same space in the aerodynamics are the same is utilized to more uniformly disperse the thrust of the connecting seat 633 on the expansion facing 62, thereby avoiding the occurrence of different stress conditions, the inner arc-pulling rod 635 is buckled on the middle section of the inner side of the side arc-pulling rod 632, the other end of the inner arc-pulling rod 635 is fixedly welded on the inner side wall of the seat frame 631, the number of the inner arc-pulling rod 635 is the same as that of the side arc-pulling rod 632, the inner arc-pulling rod 635 is an arc-shaped elastic rod, the elasticity of the inner arc-pulling rod is in a straight state, the design is used to apply a tensile force in a rebound direction to the side arc-pulling rod 632, the design is used to increase the rebound force of the side arc-pulling rod 632, so that the pressure applied to the connecting seat 633, the rod-like design makes it can carry out the propelling movement effect of assistant nature to side bow-shaped pole 632 at resilience in-process for the resilience of side bow-shaped pole 632 is simpler, further increases the laminating effect of inflation cladding 62 and cable surface.

The working principle of the power cable sealing device will be described in detail below.

As shown in fig. 1-5, firstly, two ends of the cable respectively pass through two sealing sleeves 6, then the cable is connected together by a cable connector, then the packaging housing 1 is fixedly connected by a connecting bolt 2, finally, the inflation valve port 3 is opened to allow the outside air to enter the sealing sleeves 6, after a proper amount of air is filled, the inflation valve port 3 is closed, in the process, when the inflation valve port 3 is opened, the internal negative pressure state of the embedded steel tube 61 and the expansion cover 62 is released, so that the pressure of the expansion cover 62 on the air bag 634 is reduced, the connecting seat 633 is pressed down under the resilience of the side arc rod 632 and the inner arc rod 635 until the side arc rod 632 and the inner arc rod 635 are in a stress balance state, at the moment, the internal pressure of the embedded steel tube 61 and the expansion cover 62 is the same as the outside, and the pressure of the air bag 634 is greater than the atmospheric pressure, the pressure applied to the air bag 634 by the connecting seat 633 is uniformly dispersed on each position of the surface of the air bag 634 under the action of aerodynamic characteristics, namely the pressure of each point of the contact surface of the air bag 634 and the expansion covering surface 62 is the same, so that the pressure of each point of the contact surface of the expansion covering surface 62 and the cable is the same, and the probability of the occurrence of the infiltration condition caused by different pressures is reduced;

the arc of side bow-shaped pole 632 and interior arc pole 635 is kick-backed and the design that quantity is equal, make side bow-shaped pole 632 and interior arc pole 635 can promote connecting seat 633 at the rebound in-process, produce the displacement for seat frame 631, make connecting seat 633 can produce the suppression to inflation facing 62 through gasbag 634 at this in-process, the design that negative pressure made inflation facing 62 to suppress pressure boost subassembly 63 is then used for enlarging the holistic internal diameter of seal cover 6 in advance, make the cable pass more easily, only need when needing the maintenance to inhale into negative pressure state with gomphosis steel pipe 61 and inflation facing 62's inside again through inflating valve port 3 can, this process need not add sealed glue again, the cost of maintaining has been reduced, the feature of environmental protection has also been improved.

The present invention has been described in general terms in the foregoing, but it will be apparent to those skilled in the art that modifications and improvements can be made thereto based on the present invention. Therefore, modifications or improvements are within the scope of the invention without departing from the spirit of the inventive concept.

Claims

1. A power cable sealing device comprising an encapsulating housing (1), characterized in that: the number of the packaging shells (1) is two, the two packaging shells (1) are fixedly connected through a plurality of connecting bolts (2), one packaging shell (1) is fixedly provided with an inflation valve port (3), the inflation valve port (3) is connected with two air guide pipes (4), the air guide pipes (4) are connected with a sealing sleeve (6), the sealing sleeve (6) is embedded in the embedded steel ring (5), and the embedded steel ring (5) is embedded between the two packaging shells (1) in a sealing mode.

2. A power cable sealing device according to claim 1, wherein: the sealing sleeve (6) comprises an embedded steel pipe (61), an expansion covering surface (62) is connected to an inner side opening of the embedded steel pipe (61) in a sealing mode, negative pressure air is arranged inside a cavity formed by the embedded steel pipe (61) and the expansion covering surface (62), a pressurizing assembly (63) is arranged between the inner wall of the expansion covering surface (62) and the inner wall of the embedded steel pipe (61), an air pipe opening (64) is arranged on the side face of the embedded steel pipe (61), and the air pipe opening (64) is connected with the air guide pipe (4) in a sealing mode.

3. A power cable sealing device according to claim 2, wherein: pressure boost subassembly (63) are including seat frame (631), fixed connection between the lateral surface of seat frame (631) and the inner wall of gomphosis steel pipe (61), the both sides of seat frame (631) are all buckled on the edge and have been had a plurality of side bow-shaped pole (632), side bow-shaped pole (632) are kept away from on connecting seat (633), be fixed with gasbag (634) on the downside of connecting seat (633), the inside of gasbag (634) is highly-compressed air, it has interior arc pull rod (635) to buckle on the inboard middle segment of side bow-shaped pole (632), the fixed welding of the other end of interior arc pull rod (635) is on the inside wall of seat frame (631).

4. A power cable sealing device according to claim 3, wherein: the cross section of seat frame (631) is C shape, just seat frame (631) is arc rail shape, connecting seat (633) is the arc rail, the centre of a circle of seat frame (631) and the centre of a circle of connecting seat (633) coincide mutually.

5. A power cable sealing device according to claim 3, wherein: the quantity of interior arc pole (635) is the same with side bow-shaped pole (632), just interior arc pole (635) are arc bullet pole, and its elasticity tends to the state of straightening, side bow-shaped pole (632) are bow-shaped bullet pole, and its elasticity tends to the state of straightening.