High-pressure oil-filled sleeve terminal with concentric ring sealing sleeve for preventing oil leakage

Abstract

An installation platform supports a base through a plurality of supporting insulators, a base barrel is arranged on the base, a cable is arranged in the base barrel in a penetrating mode, and the cable sequentially comprises a conductor, an insulating layer, an insulating shielding layer, a metal sheath and an outer sheath from inside to outside. The inner layer of the cable is higher than the outer layer of the cable at the base barrel, the outermost layer of the cable at the upper end part of the base barrel is an insulation shielding layer, a flexible concentric ring is arranged between the base barrel and the insulation shielding layer of the cable, a positioning sealing sleeve is sleeved outside the flexible concentric ring, and the lower end part of the positioning sealing sleeve is sleeved outside the flexible concentric ring. The upper end portion of the positioning sealing sleeve is sleeved outside the insulation shielding layer, and two ends of the positioning sealing sleeve are locked through locking structures. According to the utility model, the flexible concentric ring and the positioning sleeve are mutually matched and sealed, the sealing effect is good, the cable and the base barrel are not eccentric, and the possibility of oil leakage is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of oil-filled bushings, in particular to an oil-filled bushing terminal with a concentric ring sealing sleeve for high pressure and preventing oil leakage. Background Art

[0002] Although the problem of oil leakage in the gap between the cable insulation shielding layer and the upper end of the base barrel does not occur often and is an accidental event, it is very troublesome to deal with once it occurs; the patent number "202122061179.X" discloses an "intelligent oil-filled sleeve type outdoor cable terminal". All connections in this patent are only through conventional seals, and the current basic way to deal with oil leakage is to wrap semi-conductive, insulating tape, waterproof tape, external shrink heat shrink tube, etc., but these methods will still have oil leakage, and with this sealing method, the cable and the base barrel are prone to eccentricity. If eccentric, the gap between the cable insulation shielding layer and the base barrel will be larger on one side and smaller on the other side, and the oil leakage prevention winding is difficult to handle, and the probability of oil leakage will be higher. Utility Model Content

[0003] The utility model aims to provide an oil-filled casing terminal with a concentric ring sealing sleeve for high pressure and preventing oil leakage.

[0004] The innovation of the utility model is that the flexible concentric ring and the positioning sleeve are used to cooperate with each other to seal, the sealing effect is good, there is no eccentricity between the cable and the base barrel, and the possibility of oil leakage is greatly reduced.

[0005] In order to achieve the above utility model purpose, the technical solution of the utility model is:

[0006] A high voltage oil-filled bushing terminal with a concentric ring sealing sleeve to prevent oil leakage, comprising an installation platform, the installation platform supporting a base through a plurality of supporting insulators, a base barrel being provided on the base, a cable being passed through the base barrel, the cable comprising, from the inside to the outside, a conductor, an insulating layer, an insulating shielding layer, a metal sheath, and an outer sheath, each inner layer of the cable located at the base barrel being higher than its outer layer, the outermost layer of the cable located at the upper end of the base barrel being an insulating shielding layer, a circle of flexible concentric rings being provided between the base barrel and the insulating shielding layer of the cable, a positioning sealing sleeve being provided on the outer sleeve of the flexible concentric ring, the lower end of the positioning sealing sleeve being sleeved outside the flexible concentric ring, and the upper end being sleeved outside the insulating shielding layer, and both ends of the positioning sealing sleeve being locked by a locking structure.

[0007] Furthermore, the locking structure is a clamp.

[0008] Furthermore, the flexible concentric circles are formed by winding flexible concentric sheets.

[0009] Furthermore, the flexible concentric sheet includes three sections from top to bottom: upper, middle and lower sections, the thickness of the upper section is greater than that of the lower section, the middle section connects the upper and lower sections and has an inclined section on the outside and a flat section on the inside.

[0010] Furthermore, the flexible concentric sheet and the positioning sealing sleeve are both made of silicone rubber.

[0011] The beneficial effects of the utility model are:

[0012] 1. The utility model adopts a flexible concentric ring and a positioning sleeve to cooperate with each other to seal, the sealing effect is good, there is no eccentricity between the cable and the base barrel, and the possibility of oil leakage is greatly reduced.

[0013] 2. The flexible concentric sheet in the utility model adopts the upper, middle and lower three-section type, and the thickness of the upper section is greater than that of the lower section. The middle section connects the upper and lower sections and has an inclined section on the outside and a flat section on the inside. This structure makes the flexible concentric sheet suitable for adjustment to cables of different sizes. If the cable is too thick, cut off a little bit of the upper section.

[0014] 3. In the utility model, the positioning sealing sleeve can also be used to position the excess distance of the insulating shielding layer, which is convenient for the installation of the stress cone. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 It is a schematic diagram of the structure of the flexible concentric ring and the positioning sealing sleeve.

[0017] Figure 3 Schematic diagram of the cross section of the flexible concentric sheet. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present utility model will be described clearly and completely below in conjunction with the accompanying drawings.

[0019] Example 1: Figure 1 , 2As shown in Figure 3, a high-voltage oil-filled bushing terminal with a concentric ring sealing sleeve to prevent oil leakage comprises an installation platform 1, the installation platform 1 supports a base 3 through a plurality of supporting insulators 2, a base barrel 4 is provided on the base 3, a cable 5 is passed through the base barrel 4, the cable 5 comprises a conductor 5.1, an insulating layer 5.2, an insulating shielding layer 5.3, a metal sheath 5.4, and an outer sheath 5.5 from the inside to the outside, each inner layer of the cable 5 located at the base barrel 4 is higher than its outer layer, the outermost layer of the cable 5 located at the upper end of the base barrel 4 is an insulating shielding layer 5.3, a circle of flexible concentric rings 6 is provided between the base barrel 4 and the insulating shielding layer 5.3 of the cable 5, the flexible concentric rings 6 are formed by winding flexible concentric sheets, and the flexible concentric sheets comprise upper, middle and lower sections from top to bottom, the upper section 6.1 is thicker than the lower section 6.2, the middle section 6.3 connects the upper and lower sections, and the outer side is an inclined section, and the inner side is a flat section. A positioning sealing sleeve 7 is provided on the outer sleeve of the flexible concentric ring 6. The lower end of the positioning sealing sleeve 7 is sleeved outside the flexible concentric ring 6, and the upper end is sleeved outside the insulating shielding layer 5.3. Both ends of the positioning sealing sleeve 7 are locked by a locking structure 8, and the locking structure 8 is a clamp. The flexible concentric ring 6 and the positioning sealing sleeve 7 are both made of silicone rubber.

[0020] The described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Claims

1. A high-voltage oil-filled bushing terminal with a concentric ring sealing sleeve to prevent oil leakage, comprising a mounting platform, the mounting platform supporting a base through a plurality of supporting insulators, a base barrel being provided on the base, a cable being passed through the base barrel, the cable comprising a conductor, an insulating layer, an insulating shielding layer, a metal sheath, and an outer sheath in sequence from the inside to the outside, each inner layer of the cable located at the base barrel being higher than its outer layer, and the outermost layer of the cable located at the upper end of the base barrel being an insulating shielding layer, characterized in that: A flexible concentric ring is arranged between the base barrel and the insulating shielding layer of the cable, and a positioning sealing sleeve is arranged on the outer sleeve of the flexible concentric ring. The lower end of the positioning sealing sleeve is arranged outside the flexible concentric ring, and the upper end is arranged outside the insulating shielding layer. Both ends of the positioning sealing sleeve are locked by a locking structure.

2. The high-pressure oil-filled casing terminal with concentric ring sealing sleeve for preventing oil leakage according to claim 1 is characterized in that: The locking structure is a clamp.

3. The high-pressure oil-filled casing terminal with concentric ring sealing sleeve for preventing oil leakage according to claim 2 is characterized in that: The flexible concentric circles are formed by winding flexible concentric sheets.

4. The high-pressure oil-filled casing terminal with concentric ring sealing sleeve for preventing oil leakage according to claim 3 is characterized in that: The flexible concentric sheet includes three sections from top to bottom: upper, middle and lower. The thickness of the upper section is greater than that of the lower section. The middle section connects the upper and lower sections and has an inclined section on the outside and a flat section on the inside.

5. The high-pressure oil-filled casing terminal with concentric ring sealing sleeve for preventing oil leakage according to claim 3 is characterized in that: The flexible concentric sheet and the positioning sealing sleeve are both made of silicone rubber.

Images