Cable accessory stress cone with adjusting function

Abstract

The utility model belongs to the technical field of cable accessories, and discloses a cable accessory stress cone with an adjusting function, which comprises a stress cone end part and a stress cone opening part, the stress cone end part and the stress cone opening part are integrally formed, and the stress cone end part is of a hollow cylindrical structure. The opening part of the stress cone is tightened or relaxed through the limiting ring arranged at the outer end of the opening part of the stress cone in a sleeving mode, in the position adjusting process of the limiting ring, the elastic piece is extruded by the limiting ring, and the radian of the whole elastic piece is changed along with change of the position of the limiting ring; the whole inner wall surface of the opening part of the stress cone is pushed to be tightened inwards instead of the position where the limiting ring is located to be tightened inwards, so that the whole inner wall surface of the opening part of the stress cone can be attached to the surface of the cable, and the situation that the bearing capacity of the cable is reduced due to the fact that the stress of the non-attached part is too large is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable accessory technical field especially, it relates to a cable accessory stress cone with adjusting function. BACKGROUND

[0002] The prefabricated rubber stress cone is the key component of the cable and its accessories in the high-voltage transmission process as the homogenization of the electric field of the cable accessories, when the cable insulation shield is cut off, it can properly improve the electric field of the semiconductive shield (or sheath) and the line core connection, the field strength of the power cable insulation shield layer is evenly distributed, thereby the electric field concentration near the shield layer can be greatly reduced, and the cable accessories are prevented from being punctured, therefore, whether the performance can meet the requirements is very important, which relates to the actual use effect of the cable accessories.

[0003] Through the search of Chinese utility model patent (publication number CN206962409U) discloses a kind of nonlinear conductance material stress cone, by the center of the opening of circular ring to stress cone and force, it can reach the effect of changing opening curved surface radian, further adapt to different sizes of cable.

[0004] But through practical application, it is found that the technical scheme still at least has following defects:

[0005] The circular ring for converging the opening end of stress cone is arranged at the end of the opening end in the scheme, in the process of tightening the circular ring, only the end of the opening end can be obviously deformed, and the deformation degree of the rest part of the opening end is small, cannot guarantee close fit with cable, further cause stress to concentrate in local area, increase the stress of the area, thereby reduce the carrying capacity of cable system. UTILITY MODEL CONTENT

[0006] The utility model intends to provide a kind of cable accessory stress cone with adjusting function to solve the problems raised in the above background art, the multiple elastic sheets are inlaid in the inside of stress cone opening part in the scheme, and the stress cone opening part is tightened or widened by the limiting ring of stress cone opening part outer end, in the process of adjusting the position of limiting ring, elastic sheet is extruded by limiting ring, the overall of elastic sheet changes radian with the change of the position of limiting ring, further tighten the whole inner wall surface of stress cone opening part inward, not only the position of limiting ring is tightened inward, so that the whole inner wall surface of stress cone opening part can be close fit with cable surface, avoid the stress of the part that does not exist close fit is too large, and reduce the carrying capacity of cable, the deformation groove opened in the inside of stress cone opening part can ensure that the surface of stress cone opening part inner wall is simultaneously shrunk to the center position in the process of tightening, avoid irregular deformation.

[0007] To achieve the above object, the utility model provides the following technical scheme:

[0008] A cable accessory stress cone with adjusting function, comprising a stress cone end part and a stress cone opening part, the stress cone end part and the stress cone opening part are integrally formed, the stress cone end part is provided as a hollow cylindrical structure, the outer end of the stress cone opening part and the inner wall diameter gradually increase from the stress cone end part to the stress cone opening part, a plurality of elastic sheets are inlaid and mounted at the inner end of the stress cone end part, the plurality of elastic sheets are arranged in a ring shape at equal intervals with the stress cone opening part as the axis, and a limiting ring is sleeved at the outer end of the stress cone opening part.

[0009] Preferably, the elastic sheet is provided as an arc-shaped structure matched with the arc of the stress cone opening part.

[0010] Preferably, a plurality of clamping grooves are formed at the outer end of the stress cone opening part, and the plurality of clamping grooves are provided as a ring-shaped structure matched with the width of the limiting ring.

[0011] Preferably, the plurality of clamping grooves are arranged at equal intervals along the surface of the stress cone opening part, and the diameters of the plurality of clamping grooves gradually increase from the stress cone end part to the stress cone opening part.

[0012] Preferably, a plurality of annular clamping teeth are integrally formed at both ends of the limiting ring, and the plurality of annular clamping teeth are provided as concentric circles with the limiting ring as the axis.

[0013] Preferably, a plurality of deformation grooves are formed at the inner wall of the stress cone opening part, and the plurality of deformation grooves are arranged in a ring shape at equal intervals with the stress cone opening part as the axis.

[0014] Compared with the prior art, the technical scheme has the beneficial effects that:

[0015] The plurality of elastic sheets are inlaid in the inside of the stress cone opening part, and the stress cone opening part is tightened or widened by the limiting ring sleeved at the outer end of the stress cone opening part. In the process of adjusting the position of the limiting ring, the elastic sheets are extruded by the limiting ring, the overall arc of the elastic sheets changes with the change of the position of the limiting ring, and then the entire inner wall surface of the stress cone opening part is tightened inward, not only the position where the limiting ring is located is tightened inward, so that the entire inner wall surface of the stress cone opening part can be matched with the surface of the cable, the stress of the part not matched is avoided to be too large, and the carrying capacity of the cable is reduced. At the same time, the deformation grooves formed in the inside of the stress cone opening part can ensure that the surfaces of the inner wall of the stress cone opening part are synchronously contracted to the center position in the tightening process, and irregular deformation is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A front sectional view structure schematic diagram of the stress cone end part and the stress cone opening part is provided for the utility model.

[0017] Figure 2The utility model provides a limiting ring positive cross section structure schematic diagram;

[0018] Figure 3 The utility model provides Figure 2 Middle A structure schematic diagram shows;

[0019] Figure 4 The utility model provides stress cone opening part side cross section structure schematic diagram.

[0020] Reference: 1, stress cone end part;2, stress cone opening part;3, elastic sheet;4, limiting ring;5, clamping groove;6, deformation groove;7, annular clamping tooth. Specific implementation

[0021] The utility model makes further detailed explanation in combination with the drawings and implementation:

[0022] As Figures 1-2 The utility model discloses a cable accessory stress cone with adjusting function, including stress cone end part 1 and stress cone opening part 2, stress cone end part 1 and stress cone opening part 2 are integrally formed, stress cone end part 1 is set as hollow cylinder structure, the outer end of stress cone opening part 2 and the diameter of inner wall gradually increase from stress cone end part 1 to stress cone opening part 2's direction, the inner end of stress cone end part 1 is inlaid and is installed with multiple elastic sheets 3, multiple elastic sheets 3 are annular equidistance arrangement with stress cone opening part 2 as the axis, the outer end of stress cone opening part 2 is equipped with limiting ring 4, elastic sheet 3 is set as the arc structure that matches with the camber of stress cone opening part 2, the outer end of stress cone opening part 2 is set with multiple clamping grooves 5, multiple clamping grooves 5 are all set as the annular structure that matches with the width of limiting ring 4, multiple clamping grooves 5 are equidistance arrangement along the surface of stress cone opening part 2, and the diameter of multiple clamping grooves 5 gradually increases from stress cone end part 1 to stress cone opening part 2's direction.

[0023] The prefabricated rubber stress cone is the key component of the cable and its accessories in the high-voltage transmission process as the homogenization electric field of the cable accessory, when the cable insulation shield is cut off, it can properly improve the electric field of the semiconductive shield or the sheath cut-off place and the core joint, make the field intensity trend of the power cable insulation shield cut-off place evenly distributed, so that the electric field concentration near the shield layer can be greatly reduced, prevent the cable accessory from being punctured, therefore, whether its performance can meet the requirement is crucial, which relates to the actual use effect of the cable accessory.

[0024] In the installation of the stress cone, it is necessary to ensure that it is closely attached to the cable to avoid stress concentration in the local area. In the present scheme, the user can tighten or loosen the opening of the stress cone opening part 2 by changing the position of the limiting ring 4. Since the size of the limiting ring 4 does not change, the user can set the limiting ring 4 into different card slots 5 to apply different degrees of tightening force to the stress cone opening part 2. The closer the limiting ring 4 is to the opening end of the stress cone opening part 2, the tighter the stress cone opening part 2 is bundled, and thus it can be adapted to smaller cables. When the limiting ring 4 applies a tightening force to the stress cone opening part 2, the elastic sheet 3 will be extruded, and the overall arc of the elastic sheet 3 will change, thereby forcing the entire inner wall surface of the stress cone opening part 2 to tighten inward, rather than just the position of the limiting ring 4. Thus, the entire inner wall surface of the stress cone opening part 2 can be attached to the cable surface to avoid excessive stress in the unattached part, thereby reducing the carrying capacity of the cable. The elastic sheet 3 is made of a memory material that can change its arc with the change in the position of the limiting ring 4, ensuring that the diameter of the stress cone opening part 2 changes with the change in the position of the limiting ring 4.

[0025] As shown in Figure 3 The limiting ring 4 is integrally formed with a plurality of annular clamping teeth 7 at both ends, and the plurality of annular clamping teeth 7 are arranged in concentric circles with the limiting ring 4 as the center.

[0026] In the present scheme, when the limiting ring 4 is clamped inside the card slot 5, the plurality of annular clamping teeth 7 can effectively enhance the friction between the limiting ring 4 and the inner wall of the card slot 5, thereby improving the stability of the limiting ring 4 and reducing the possibility of its falling off.

[0027] As shown in Figure 4 The inner wall of the stress cone opening part 2 is provided with a plurality of deformation grooves 6, and the plurality of deformation grooves 6 are arranged in a ring shape at equal intervals with the stress cone opening part 2 as the center.

[0028] In the present scheme, the plurality of deformation grooves 6 can provide deformation to the inner wall of the stress cone opening part 2. When the inner wall of the stress cone opening part 2 is tightened, the inner wall of the plurality of deformation grooves 6 can be simultaneously contracted inward, thereby ensuring that the surfaces of the inner wall of the stress cone opening part 2 are simultaneously contracted toward the center position to prevent irregular deformation.

[0029] The specific implementation process is as follows:

[0030] In use, the user sets the limiting ring 4 into different card slots 5, which can apply different degrees of tightening force to the stress cone opening part 2, the closer the limiting ring 4 is to the opening end of the stress cone opening part 2, the tighter the stress cone opening part 2 is bundled, and then it can be adapted to smaller size cables, when the limiting ring 4 applies the tightening force to the stress cone opening part 2, it will cause the elastic sheet 3 to be extruded, the overall elastic sheet 3 will change in arc, and then force the entire inner wall surface of the stress cone opening part 2 to be tightened inward, not just the position of the limiting ring 4, thereby ensuring that the entire inner wall surface of the stress cone opening part 2 can be in contact with the cable surface.

[0031] The above is only an embodiment of the present application, and the specific technical solutions and / or common knowledge of the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the technical scheme of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A cable accessory stress cone with adjustment function, characterized by: The stress cone end (1) and the stress cone opening part (2) are integrally formed, the stress cone end (1) is provided as a hollow cylindrical structure, the outer end of the stress cone opening part (2) and the inner wall diameter gradually increase from the stress cone end (1) to the stress cone opening part (2), the inner end of the stress cone end (1) is inlaid with a plurality of elastic sheets (3), the plurality of elastic sheets (3) are arranged in a ring shape at equal intervals with the stress cone opening part (2) as the axis, and the outer end of the stress cone opening part (2) is sleeved with a limiting ring (4).

2. A cable accessory stress cone with adjustment function according to claim 1, characterized in that: The elastic sheet (3) is arranged as an arc structure matched with the arc of the stress cone opening part (2).

3. A cable accessory stress cone with adjustment function according to claim 1, characterized in that: The outer end of the stress cone opening part (2) is provided with a plurality of clamping grooves (5), and the plurality of clamping grooves (5) are arranged in a ring shape matched with the width of the limiting ring (4).

4. A cable accessory stress cone with adjustment function according to claim 3, characterized in that: The plurality of clamping grooves (5) are arranged at equal intervals along the surface of the stress cone opening part (2), and the diameter of the plurality of clamping grooves (5) gradually increases from the stress cone end (1) to the stress cone opening part (2).

5. A cable accessory stress cone with adjustment function according to claim 1, characterized in that: The limiting ring (4) is integrally formed with a plurality of annular clamping teeth (7) at both ends, and the plurality of annular clamping teeth (7) are arranged in concentric circles with the limiting ring (4) as the axis.

6. A cable accessory stress cone with adjustment function according to claim 1, characterized in that: The inner wall of the stress cone opening part (2) is provided with a plurality of deformation grooves (6), and the plurality of deformation grooves (6) are arranged in a ring shape at equal intervals with the stress cone opening part (2) as the axis.

Images