CN112467681B

CN112467681B - Intermediate head protective structure of power supply sealed cable

Info

Publication number: CN112467681B
Application number: CN202011449393.6A
Authority: CN
Inventors: 刘广林; 王珊珊; 花晓彬; 黄洁; 韩琳
Original assignee: Mengzhou Power Supply Co Of State Grid Henan Electric Power Co; State Grid Corp of China SGCC
Current assignee: Mengzhou Power Supply Co Of State Grid Henan Electric Power Co; State Grid Corp of China SGCC
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2023-03-10
Anticipated expiration: 2040-12-09
Also published as: CN112467681A

Abstract

The invention discloses an intermediate joint protection structure of a power supply sealed cable, which comprises two connecting rings which are oppositely arranged, wherein the end parts of the connecting rings are fixedly connected with a fastening compression ring in a circular truncated cone shape, the end parts of the fastening compression ring are fixedly connected with a locking ring, the outer side wall of the locking ring is in threaded connection with an end nut ring, a sealing device is arranged on the end nut ring, the outer side wall of the fastening compression ring is sleeved with a stress outer ring in a circular truncated cone shape, the stress outer ring is connected with a protection outer ring through a linkage assembly, and the two protection outer rings which are oppositely arranged are connected through a butt joint protection assembly. The fan-shaped locking pieces are deformed by fastening the end threaded rings, the fan-shaped locking pieces can be connected with the cable in a fastening mode, and when the cable is under tension, the tension can be transmitted to the fan-shaped locking pieces, so that the fan-shaped locking pieces can be offset by fastening and resisting force between the connecting rings, internal leads of the cable are prevented from being disconnected when the cable is under tension, and normal use of the cable is guaranteed.

Description

Intermediate head protective structure of power supply sealed cable

Technical Field

The invention relates to the technical field of cable connection end protection, in particular to a protective structure for an intermediate joint of a power supply sealed cable.

Background

The power cable is used for transmitting and distributing electric energy and is formed by combining one or more electric wires, the power cable is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and transmission lines under river-crossing seawater, in the power line, the proportion of the cable is gradually increased, the power cable is a cable product used for transmitting and distributing high-power electric energy in a trunk line of a power system, and the sealed cable belongs to a cable with high sealing property and is often used in an outdoor environment;

when the laying length of the high-voltage cable is longer, a cable intermediate joint is required to be used for connection, and the connection operation of the cable intermediate joint is generally completed on a cable laying site; the existing cable intermediate joint is mostly connected by adopting a metal threaded pipe, the friction between the metal threaded pipe and the smooth cable surface is very small, when the optical cable is under tension, the metal threaded pipe cannot accept the tension on the cable, so that the main tension is fully acted on the cable butt-joint wire, the connection of the wires in the cable is easily disconnected in the past, when the cable is laid at a low position and is extruded, the metal threaded pipe cannot buffer the pressure, the wire connection part can be damaged, and the metal threaded pipe is not good in sealing type, so that a sealing component is required to be installed at the cable joint part, and the construction cost is increased; to this end, an intermediate joint protection structure for a hermetically sealed power supply cable is proposed.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a protective structure for an intermediate joint of a power supply sealed cable.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a power supply sealed cable's intermediate head protective structure, includes two go-between that set up relatively, go-between tip fixedly connected with is the fastening oppression ring of round platform form, fastening oppression ring tip fixedly connected with locking ring, locking ring lateral wall threaded connection has the tip nut ring, be provided with sealing device on the tip nut ring, fastening oppression ring lateral wall cover is equipped with the atress outer ring that is the round platform form setting, the atress outer ring is connected with the protection outer loop through linkage assembly, two of relative setting the protection outer loop is connected through butt joint protection component, the protection outer loop comprises a plurality of curved ring segments that are, and is adjacent the relative lateral wall ring segment has all been seted up and has been moved the mouth, two of relative setting move the common sliding connection of mouth has the location inner prop, location inner prop lateral wall cover is equipped with buffer spring, the buffer spring both ends are connected with the ring segment lateral wall of both sides respectively, linkage assembly is including setting up a plurality of first connecting pieces at atress outer loop segment tip, the equal fixedly connected with the second connecting piece of inner wall, first connecting piece passes through the gangbar with the second connecting piece, butt joint protection component includes fixed connection in one side high strength outer pillar on the lateral wall the high strength outer ring segment is provided with the high intensity nut prevents that the mouth from inserting and is inserted and is located the opposite side of the ring segment.

Preferably, the sealing device comprises a sealing ring fixedly connected to the end portion of the end nut ring, one end of the sealing ring is obliquely arranged, an annular groove is formed in the obliquely arranged side wall of the sealing ring, an outer sealing ring is arranged in the annular groove, and an inner sealing ring is arranged on the inner wall of the locking ring.

Preferably, the locking ring comprises a plurality of sector locking pieces, the wider ends of the sector locking pieces are fixedly connected to the end portions of the fastening compression ring, and the sector locking pieces are made of high-flexibility metal materials.

Preferably, the end portion of the connection ring on one side is provided with an external thread groove, the end portion of the connection ring on the other side is provided with an internal thread groove, and the external thread groove is matched with the internal thread groove.

Preferably, the outer side wall of the connecting ring is fixedly connected with extrusion rings, and rubber gaskets are arranged on opposite surfaces of the two extrusion rings.

Preferably, the first connecting piece and the second connecting piece are both provided with connecting grooves, connecting shafts are fixedly connected in the connecting grooves, and connecting holes which are sleeved with the connecting shafts are formed in the two ends of the linkage rod.

Compared with the prior art, the invention has the beneficial effects that:

1. through setting up the go-between in cable joint department, utilize the extrusion between the extrusion ring on the go-between to make rubber packing pad warp and realize the effective sealing to go-between department, and rotate the fastening of the tip nut ring of connection through the screw, make fan-shaped stay produce and warp, make the inner seal ring that sets up in fan-shaped stay department can realize the sealed between fastening packing ring and the cable rubber skin, thereby effectively avoid water to enter into joint department along the cable, realize the effective sealing to joint department wire.

2. Utilize the fastening of tip screw ring to make fan-shaped locking piece warp, fan-shaped locking piece can realize being connected with the fastening of cable, can transmit the pulling force to fan-shaped locking piece when the cable receives the pulling force on to realize offsetting through the fastening of between the go-between to the power of keeping out, thereby avoid the cable to cause the inside conductor disconnection when the atress, guarantee the normal use of cable.

3. When the cable laying received pressure on ground, realized the part with pressure through buffer spring and offset under the effect of high strength outer protection post and sealing ring, remaining pressure can be through the effect of gangbar with vertical pressure transformation be the level and support the touch-force to transfer to go up ring department under the effect of fastening pressure packing ring, tip nut ring and atress outer loop, thereby make relative horizontal force obtain offsetting each other, avoid pressure to cause the damage to cable joint department.

Drawings

Fig. 1 is a schematic structural view of an intermediate joint protection structure of a power-supplying sealed cable according to the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 3 is an enlarged view of the structure at B in FIG. 1;

fig. 4 is a schematic connection structure diagram of an intermediate joint protection structure of a hermetically sealed power supply cable according to the present invention.

In the figure: the device comprises a connecting ring 1, a fastening compression ring 2, a nut ring at the end 3, a stressed outer ring 4, a ring-shaped part 5, a sealing ring 6, an outer sealing ring 7, an inner sealing ring 8, a sector locking sheet 9, a positioning inner column 10, a buffer spring 11, a linkage rod 12, a high-strength outer protection column 13, an insertion opening 14, an outer thread groove 15, an inner thread groove 16, an extrusion ring 17, a rubber sealing gasket 18, a first connecting piece 19 and a second connecting piece 20.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-4, a middle joint protection structure of a power supply sealed cable comprises two connecting rings 1 which are oppositely arranged, wherein the end parts of the connecting rings 1 are fixedly connected with a fastening compression ring 2 in a circular truncated cone shape, the end part of the fastening compression ring 2 is fixedly connected with a locking ring, the outer side wall of the locking ring is in threaded connection with an end nut ring 3, a sealing device is arranged on the end nut ring 3, the sealing device further comprises a sealing ring 6 fixedly connected to the end part of the end nut ring 3, one end of the sealing ring 6 is obliquely arranged, an annular groove is formed in the obliquely arranged side wall of the sealing ring 6, an outer sealing ring 7 is arranged in the annular groove, and an inner sealing ring 8 is arranged on the inner wall of the locking ring; still further, the locking ring comprises a plurality of fan-shaped locking pieces 9, fan-shaped locking pieces 9 are wider one end and fixedly connected to the end of the fastening pressing ring 2, and the fan-shaped locking pieces 9 are made of high-flexibility metal materials.

The outer side wall of the fastening compression ring 2 is sleeved with a stress outer ring 4 which is arranged in a circular truncated cone shape, the stress outer ring 4 is connected with a protection outer ring through a linkage assembly, further, the protection outer ring is composed of a plurality of arc-shaped ring parts 5, the opposite side walls of the adjacent ring parts 5 are respectively provided with a moving port, two moving ports which are arranged oppositely are jointly connected with a positioning inner column 10 in a sliding mode, the limiting effect is achieved through the positioning inner column 10, the two adjacent ring parts 5 can be kept consistent, the outer side wall of the positioning inner column 10 is sleeved with a buffer spring 11, and two ends of the buffer spring 11 are respectively connected with the side walls of the ring parts 5 on two sides; furthermore, the linkage assembly comprises a plurality of first connecting pieces 19 arranged at the end part of the stressed outer ring 4, the inner walls of the ring-shaped pieces 5 are fixedly connected with second connecting pieces 20, and the first connecting pieces 19 are connected with the second connecting pieces 20 through linkage rods 12; furthermore, the first connecting piece 19 and the second connecting piece 20 are both provided with connecting grooves, connecting shafts are fixedly connected in the connecting grooves, and both ends of the linkage rod 12 are both provided with connecting holes which are sleeved with the connecting shafts.

The two oppositely arranged protection outer rings are connected through a butt joint protection component; further, the butt joint protection assembly comprises a high-strength outer protection column 13 fixedly connected to the side wall of the ring-shaped member 5 on one side, the end part of the high-strength outer protection column 13 is connected with a fastening nut through threads, an inserting opening 14 penetrating through the side wall is formed in the ring-shaped member 5 on the other side, and the inserting opening 14 is matched with the high-strength outer protection column 13; still further, the end portion of the connecting ring 1 located on one side is provided with an external thread groove 15, the end portion of the connecting ring 1 located on the other side is provided with an internal thread groove, the external thread groove 15 is matched with the internal thread groove 16, the outer side wall of the connecting ring 1 is fixedly connected with extrusion rings 17, and the opposite surfaces of the two extrusion rings 17 are provided with rubber sealing gaskets 18.

When the cable is installed on a cable, the cable is installed by the following steps in sequence: firstly, the end nut ring 3 is sleeved on the cable, then the stressed outer ring 4 and the protective outer ring are sleeved on the cable together, and then the connecting ring 1 and the fastening compression ring 2 are sleeved on the cable;

after the two cable joints are completed, the connecting ring 1 is rotated to realize threaded connection through the external thread groove 15 and the internal thread groove 16 on the connecting ring 1, at the moment, the two extrusion rings 17 arranged on the connecting ring 1 are close to each other and are extruded, and the rubber sealing gasket 18 can realize effective sealing on the connection part of the connecting ring 1;

the end nut ring 3 is sleeved by the rotating sleeve, so that the end nut ring 3 is in threaded connection with the outer side wall of the locking ring, when the end nut ring 3 rotates, the end nut ring 3 gradually approaches the connecting ring, the sector locking sheets 9 arranged in a sector shape are extruded by the end nut ring 3 and gradually extruded towards the inside, cables in the sector locking sheets 9 are gradually enhanced to be connected with the sector locking sheets 9 in the continuous extrusion process of the sector locking sheets 9, when the cables are subjected to tensile force, the tensile force can be transmitted to the sector locking sheets 9, and therefore the fastening force between the connecting rings 2 is offset, the disconnection of internal wires of the cables caused by stress is avoided, and the normal use of the cables is ensured;

when the fan-shaped locking piece 9 is inwards extruded with the cable, the inner sealing ring 8 arranged inside the fan-shaped locking piece 9 can contact and extrude the inner wall of the cable, and the inner sealing ring 8 can deform with the cable rubber to realize sealing of the connecting ring 1, so that water is effectively prevented from entering the joint along the cable, effective sealing of a lead at the joint is realized, and short circuit caused by entering water is avoided;

when the end nut ring 3 moves, the sealing ring 6 arranged on the end nut ring 3 moves forwards, and the outer sealing ring 7 on the inclined surface of the end part of the sealing ring 6, which has the same inclination with the fastening compression ring 2, can realize the collision with the outer side wall of the fastening compression ring 2, so that the sealing between the fastening compression ring 2 and the end threaded ring 3 is realized through the outer sealing ring 7, and the water inlet is avoided;

the high-strength outer protection columns 13 arranged on the plurality of ring-shaped pieces 5 in the protection outer ring are correspondingly inserted into the insertion openings 14 in the other cable, the high-strength outer protection columns 13 are connected with the protection outer ring through fastening nuts, when the fastening nuts are fastened through tools, the two protection outer rings are relatively close to each other, and the inner wall of the stress outer ring 4 which is in a circular truncated cone shape and is arranged on the protection outer ring can be abutted against the outer wall of the fastening compression ring 2 and is in continuous contact with the stress outer ring;

when the cable joint is under external pressure, the pressure applied to the cable can act on the high-strength outer protection column 13 firstly, the high-strength outer protection column 13 is under pressure, so that the ring piece 5 in contact with the high-strength outer protection column can be under the pressure from outside to inside, the inward pressure of the ring piece 5 can be weakened through the buffer spring 11 arranged between the ring piece 5, when the ring piece 5 is pressed and moved downwards, the vertical force can be converted into horizontal force towards the connecting ring 1 through the linkage rod 12, the horizontal force can act on the stressed outer ring 4, the stressed outer ring 4 can transmit the force to the fastening compression ring 2 in contact with the stressed outer ring 4, the fastening compression ring 2 can act on the cable through the locking ring, the force generated by mutual extrusion of the cables at two ends is counteracted through the connecting ring 1, and the cable is prevented from being damaged due to the fact that the pressure acts on the cable.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.

Claims

1. The utility model provides an intermediate head protective structure of power supply sealed cable, its characterized in that includes two go-between (1) that set up relatively, go-between (1) tip fixedly connected with is fastening oppression ring (2) that the round platform is described, fastening oppression ring (2) tip fixedly connected with locking ring, locking ring lateral wall threaded connection has tip nut ring (3), be provided with sealing device on tip nut ring (3), fastening oppression ring (2) lateral wall cover is equipped with atress outer loop (4) that is the round platform form setting, atress outer loop (4) are connected with the protection outer loop through the linkage subassembly, two that set up relatively the protection outer loop is connected through butt joint protection component, the protection outer loop comprises a plurality of curved loop forming element (5), and is adjacent loop forming element (5) relative lateral wall has all seted up the removal mouth, two that set up relatively the removal mouth has location inner prop (10) jointly sliding connection, location inner prop (10) lateral wall cover is equipped with buffer spring (11), buffer spring (11) both ends are connected with the lateral wall of loop forming element (5) of both sides respectively, the linkage subassembly is including setting up at the tip (4) and second connecting piece (19) is connected with second connecting piece (20) inner wall connection piece (20), the butt joint protection assembly comprises a high-strength outer protection column (13) fixedly connected to the side wall of the ring-shaped piece (5) on one side, a fastening nut is arranged at the end of the high-strength outer protection column (13), an inserting opening (14) penetrating through the side wall is formed in the ring-shaped piece (5) on the other side, and the inserting opening (14) is matched with the high-strength outer protection column (13).

2. The intermediate joint protection structure of the power supply sealed cable according to claim 1, wherein the sealing device comprises a sealing ring (6) fixedly connected to the end of the end nut ring (3), one end of the sealing ring (6) is obliquely arranged, an annular groove is formed in the obliquely arranged side wall of the sealing ring (6), an outer sealing ring (7) is arranged in the annular groove, and an inner sealing ring (8) is arranged on the inner wall of the locking ring.

3. The middle joint protection structure for the hermetically sealed cable for supplying power of claim 1, wherein the locking ring is composed of a plurality of sector-shaped locking pieces (9), the wider end of the sector-shaped locking piece (9) is fixedly connected to the end of the fastening pressing ring (2), and the sector-shaped locking piece (9) is made of a high-flexibility metal material.

4. The intermediate joint protection structure for the sealed power supply cable according to claim 1, wherein the end of the connection ring (1) on one side is provided with an external thread groove (15), the end of the connection ring (1) on the other side is provided with an internal thread groove, and the external thread groove (15) is matched with the internal thread groove (16).

5. The intermediate joint protection structure for the sealed power supply cable according to claim 1, wherein the outer side wall of the connection ring (1) is fixedly connected with extrusion rings (17), and rubber gaskets (18) are arranged on opposite surfaces of the two extrusion rings (17).

6. The intermediate joint protection structure of the sealed power supply cable according to claim 1, wherein the first connecting member (19) and the second connecting member (20) are respectively provided with a connecting groove, a connecting shaft is fixedly connected in the connecting grooves, and both ends of the linkage rod (12) are respectively provided with a connecting hole sleeved with the connecting shaft.