CN211701450U

CN211701450U - DC ultrahigh voltage crosslinked cable flexible joint

Info

Publication number: CN211701450U
Application number: CN202020767488.1U
Authority: CN
Inventors: 钱东召; 王成刚
Original assignee: Jiangsu Dongnan Jiaolian Power Cable Co ltd
Current assignee: Jiangsu Dongnan Jiaolian Power Cable Co ltd
Priority date: 2020-05-11
Filing date: 2020-05-11
Publication date: 2020-10-16
Anticipated expiration: 2030-05-11

Abstract

The utility model relates to the technical field of cable connection equipment, in particular to a direct current ultrahigh voltage cross-linked cable flexible joint, which comprises a connecting block, wherein the inner side of the connecting block is fixedly connected with a conductive block, the left side and the right side of the connecting block are both provided with fixed pipes for fixing cables, the fixed pipes are connected with the connecting block through rubber hoses, and a clamping mechanism is arranged between the fixed pipes at two sides, the cable can be preliminarily fixed by arranging a clamping block and a first spring, gas is injected into an air bag by arranging a sealing mechanism, the air bag expands to push a push plate which can push a sealing ring to be contacted with the cable, thereby enhancing the waterproof performance of the device, improving the safety of the cable when in use, simultaneously, the sealing mechanism can also provide further fixation for the cable, ensuring the stability of connection, and by arranging the clamping mechanism and rotating a nut, the fixed pipes on the two sides are close to the connecting block, so that the cable is in close contact with the conductive block, and the stable operation of the cable can be ensured.

Description

DC ultrahigh voltage crosslinked cable flexible joint

Technical Field

The utility model relates to a cable junction equipment technical field specifically is a soft joint of direct current superhigh pressure crosslinked cable.

Background

In recent years, with the development of national economy, long-distance ultrahigh voltage direct current transmission projects are widely applied in China. The ultra-high voltage transmission refers to the transmission of electric energy by using 500-1000 kV voltage class. If the 220 KV power transmission index is 100%, the relative investment of ultrahigh voltage power transmission per kilometer, the relative cost of transmitting hundreds of kilometers per kilowatt hour, the consumption of metal materials and the like are greatly reduced, and the utilization rate of a line corridor is obviously improved. Due to the limitation of the manufacturing length of the cable in a factory, the long-distance direct current transmission engineering cable needs to adopt an intermediate joint with excellent quality to connect the short-section cables manufactured in the factory one by one.

The existing joint is complex in disassembly and assembly process, so that the working efficiency of people is low, the existing joint is poor in sealing performance, and great potential safety hazards exist, so that the direct-current ultrahigh-voltage cross-linked cable flexible joint is urgently needed to be developed aiming at the current situation so as to overcome the defects in the current practical application.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a soft joint of direct current superhigh pressure crosslinked cable to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a direct current superhigh pressure crosslinked cable flexible joint, includes the connecting block, the inboard fixed connection of connecting block is provided with the conducting block, the connecting block left and right sides all is provided with the fixed pipe that is used for fixed cable, be connected through flexible rubber hose between fixed pipe and the connecting block, both sides be provided with clamping mechanism between the fixed pipe.

As a further aspect of the present invention: and a conductor shielding layer, a cross-linked polyethylene insulating layer and an insulating shielding layer are sequentially arranged on the outer side of the conductive block from inside to outside.

As a further aspect of the present invention: the fixed intraductal side of fixing is provided with a plurality of clamp blocks, fixed connection is provided with first spring between clamp block and the fixed pipe, fixed intraductal side is provided with the recess, the recess inboard is provided with sealing mechanism.

As a further aspect of the present invention: sealing mechanism includes that fixed connection sets up the gas injection pipe in the fixed intraductal side, the inboard fixed connection of gas injection pipe is provided with the valve, gas injection pipe output and the gasbag connection of setting in the recess inboard, the gasbag is kept away from gas injection pipe one side and is provided with a plurality of and recess sliding connection's push pedal, and is a plurality of the equal fixed connection in push pedal left and right sides is provided with the limiting plate, the limiting plate with set up at the inboard spacing groove sliding connection of recess, the limiting plate is close to gasbag one side and fixed between the pipe fixed connection be provided with the second spring, gasbag one side fixed connection is kept away from in the push pedal is.

As a further aspect of the present invention: the clamping mechanism comprises connecting plates fixedly connected and arranged on the outer sides of the two side fixing pipes, bolts are arranged between the connecting plates on the two sides, and nuts are connected on the outer sides of the bolts in a threaded mode.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the cable can be preliminarily fixed by arranging the clamping block and the first spring, the air bag is filled with air by arranging the sealing mechanism, the air bag expands to push the push plate, and the push plate pushes the sealing ring to be contacted with the cable, so that the waterproof performance of the device is enhanced, the safety of the cable in use is improved, meanwhile, the sealing mechanism can further fix the cable, and the connection stability is ensured;

2. through setting up clamping mechanism, the nut rotates, makes the fixed pipe in both sides draw close to the connecting block, makes cable and conducting block in close contact with, can guarantee the steady operation of cable.

Drawings

Fig. 1 is a schematic structural diagram of a flexible joint of a direct-current ultrahigh-voltage crosslinked cable.

Fig. 2 is a front view of a flexible joint of a direct current ultrahigh voltage crosslinked cable.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2.

In the figure: 1-connecting block, 2-conducting block, 3-conductor shielding layer, 4-crosslinked polyethylene insulating layer, 5-insulating shielding layer, 6-rubber hose, 7-fixing pipe, 8-connecting plate, 9-bolt, 10-nut, 11-clamping block, 12-first spring, 13-groove, 14-air bag, 15-air injection pipe, 16-valve, 17-push plate, 18-limiting plate, 19-second spring, 20-limiting groove and 21-sealing ring.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

Example 1

Referring to fig. 1-3, in an embodiment of the present invention, a flexible joint for a direct current ultrahigh voltage crosslinked cable includes a connecting block 1, a conductive block 2 is disposed on the inner side of the connecting block 1, a fixing tube 7 for fixing the cable is disposed on each of the left and right sides of the connecting block 1, the fixing tube 7 is connected to the connecting block 1 through a rubber hose 6, and a clamping mechanism is disposed between the fixing tubes 7.

Example 2

In this embodiment, the conductive block 2 is provided with a conductor shielding layer 3, a crosslinked polyethylene insulating layer 4 and an insulating shielding layer 5 in sequence from inside to outside.

In this embodiment, fixed pipe 7 inboard is provided with a plurality of clamp blocks 11, fixed connection is provided with first spring 12 between clamp block 11 and the fixed pipe 7, through setting up clamp block 11 and first spring 12, can tentatively fix the cable, fixed pipe 7 inboard is provided with recess 13, recess 13 inboard is provided with sealing mechanism.

In this embodiment, the sealing mechanism includes an air injection pipe 15 fixedly connected and disposed outside the fixed pipe 7, a valve 16 is fixedly connected and disposed inside the air injection pipe 15, an output end of the air injection pipe 15 is connected with an air bag 14 disposed inside the groove 13, a plurality of push plates 17 slidably connected with the groove 13 are disposed on a side of the air bag 14 away from the air injection pipe 15, a plurality of limit plates 18 are fixedly connected and disposed on both left and right sides of the push plates 17, the limit plates 18 are slidably connected with limit grooves 20 disposed inside the groove 13, a second spring 19 is fixedly connected and disposed between a side of the limit plate 18 close to the air bag 14 and the fixed pipe 7, a seal ring 21 is fixedly connected and disposed on a side of the push plate 17 away from the air bag 14, by disposing the sealing mechanism, air is injected into the air bag 14, the air bag 14 expands to push the push plates 17, thereby the waterproof performance of reinforcing device improves the security of cable when using, and sealing mechanism can also provide further fixed to the cable simultaneously, guarantees the stability of connecting.

In this embodiment, clamping mechanism includes that fixed connection sets up the connecting plate 8 in the fixed pipe 7 outside in both sides, both sides be provided with bolt 9 between the connecting plate 8, bolt 9 outside threaded connection is provided with nut 10, and through setting up clamping mechanism, rotate nut 10, make the fixed pipe 7 in both sides draw close to connecting block 1, make cable and conducting block 2 in close contact with, can guarantee the steady operation of cable.

This soft joint of direct current superhigh pressure crosslinked cable, through setting up clamp splice 11 and first spring 12, can tentatively fix the cable, through setting up sealing mechanism, to gas injection in the gasbag 14, the gasbag 14 inflation can promote push pedal 17, push pedal 17 can promote sealing washer 21 and cable contact, thereby reinforcing means's waterproof performance, improve the security of cable when using, sealing mechanism can also provide further fixed to the cable simultaneously, guarantee the stability of connecting, through setting up clamping mechanism, swivel nut 10, make the fixed pipe 7 in both sides draw close to connecting block 1, make cable and 2 in close contact with of conducting block, can guarantee the steady operation of cable.

The utility model discloses a theory of operation is: the cable that will treat the joint penetrates in fixed pipe 7, and make cable head and conducting block 2 contact, clamp splice 11 and first spring 12, can tentatively fix the cable, open 15 inboard valves 16 of gas injection pipe, use the air pump to inject gas to gasbag 14, gasbag 14 inflation can promote push pedal 17, push pedal 17 can promote sealing washer 21 and cable contact, thereby reinforcing means's waterproof performance, improve the security of cable when using, sealing mechanism can also provide further fixed to the cable simultaneously, guarantee the stability of connecting, swivel nut 10, make fixed pipe 7 in both sides draw close to connecting block 1, make cable and conducting block 2 in close contact with, can guarantee the steady operation of cable.

The above is only the preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent.

Claims

1. The utility model provides a direct current superhigh pressure crosslinked cable flexible joint, includes connecting block (1), its characterized in that, the inboard fixed connection of connecting block (1) is provided with conducting block (2), the connecting block (1) left and right sides all is provided with fixed pipe (7) that are used for fixed cable, be connected through rubber hose (6) between fixed pipe (7) and connecting block (1), both sides be provided with clamping mechanism between fixed pipe (7).

2. The flexible joint of the direct-current ultrahigh-voltage crosslinked cable according to claim 1, wherein a conductor shielding layer (3), a crosslinked polyethylene insulating layer (4) and an insulating shielding layer (5) are sequentially arranged on the outer side of the conductive block (2) from inside to outside.

3. The flexible joint of the direct-current ultrahigh-voltage crosslinked cable according to claim 2, wherein a plurality of clamping blocks (11) are arranged on the inner side of the fixed pipe (7), a first spring (12) is fixedly connected between the clamping blocks (11) and the fixed pipe (7), a groove (13) is arranged on the inner side of the fixed pipe (7), and a sealing mechanism is arranged on the inner side of the groove (13).

4. The DC ultrahigh voltage crosslinked cable flexible joint according to claim 3, the sealing mechanism comprises a gas injection pipe (15) fixedly connected and arranged on the outer side of the fixed pipe (7), a valve (16) is fixedly connected and arranged on the inner side of the gas injection pipe (15), the output end of the gas injection pipe (15) is connected with a gas bag (14) arranged on the inner side of the groove (13), a plurality of push plates (17) which are connected with the groove (13) in a sliding way are arranged on one side of the air bag (14) far away from the air injection pipe (15), the left side and the right side of the push plates (17) are fixedly connected with limit plates (18), the limit plate (18) is connected with a limit groove (20) arranged at the inner side of the groove (13) in a sliding way, a second spring (19) is fixedly connected between one side of the limiting plate (18) close to the air bag (14) and the fixed tube (7), and a sealing ring (21) is fixedly connected to one side of the push plate (17) far away from the air bag (14).

5. The direct current ultrahigh voltage crosslinked cable flexible joint according to claim 1, wherein the clamping mechanism comprises connecting plates (8) fixedly connected and arranged on the outer sides of the fixing pipes (7) on two sides, a bolt (9) is arranged between the connecting plates (8) on two sides, and a nut (10) is arranged on the outer side of the bolt (9) in a threaded connection manner.