CN111430088A

CN111430088A - Insulator string group and strain section

Info

Publication number: CN111430088A
Application number: CN202010261043.0A
Authority: CN
Inventors: 张畅生; 王健宏; 覃飞; 苏奕辉; 郭旭敏; 王小勇; 许国伟
Original assignee: Guangdong Power Grid Co Ltd; Shantou Power Supply Bureau of Guangdong Power Grid Co Ltd
Current assignee: Guangdong Power Grid Co Ltd; Shantou Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date: 2020-04-01
Filing date: 2020-04-01
Publication date: 2020-07-17

Abstract

The invention relates to the field of power equipment, and discloses an insulator string group and a strain section, which improve the ground distance of a cable under the condition of not changing the structure of a linear tower. This insulator chain group includes: the insulation suspension parts are used for connecting the linear pole tower and the insulation assemblies; the two sets of insulation assemblies are respectively positioned at two sides of the insulation suspension part along the circuit direction, the insulation assemblies are arranged along the circuit direction, and one side of each insulation assembly, which is far away from the insulation suspension part, is connected with a clamping part for clamping a cable. The strain section comprises two strain towers, at least one linear tower and at least one cable; the linear tower is positioned between the two tension towers, the linear tower is connected with the insulator string group, and the insulator string group is connected with the cable. Because insulating subassembly sets up along following the circuit direction, has improved insulating subassembly's terminal terrain clearance to improve the terrain clearance of pressing from both sides the portion of getting and the height of cable, improved power line's security.

Description

Insulator string group and strain section

Technical Field

The invention relates to the field of power equipment, in particular to an insulator string group and a strain section.

Background

Along with the popularization of electric power, the distance of an electric power line is longer and longer, and because a cable serving as a transmission carrier is flexible, a linear tower needs to be erected in the middle of the cable, so that the cable is prevented from moving downwards under the action of self weight, and the overall safety is prevented from being reduced.

In order to improve the safety, the prior art provides an insulator string group for hanging a cable, and the insulator string group comprises a hardware fitting and an insulator, so that the cable can be insulated from a linear tower, and the normal transmission work of the cable is ensured. However, the structure does not effectively utilize the whole height of the linear tower, so that the ground clearance of the cable only meets the safety standard under normal conditions, when part of terrain and ground objects rise due to transition, the ground clearance of the cable is reduced, the ground clearance of the cable does not meet the safety standard, great potential safety hazards are hidden, and the safety of the power line is insufficient.

Disclosure of Invention

The invention aims to provide an insulator string group and a strain section to solve the problem of insufficient safety of the existing power line.

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

an insulator string assembly for insulatively connecting a cable and a linear tower, the insulator string assembly comprising: the insulation suspension parts are used for connecting the linear tower and the insulation assemblies;

the two sets of insulation assemblies are respectively positioned on two sides of the insulation suspension part along the circuit direction, the insulation assemblies are arranged along the circuit direction, and one side, far away from the insulation suspension part, of the insulation assemblies is connected with a clamping part for clamping the cable.

Optionally, the insulation assembly comprises two connecting plates and at least two insulators, wherein one of the connecting plates is connected with the insulation hanger, and the other connecting plate is connected with the clamping part; the insulators are located between the two connecting plates and used for insulating and connecting the two connecting plates.

Optionally, the number of the insulators is two, and the insulators are arranged side by side.

Optionally, one side of the insulator is connected with a bowl head hanging ring, and the other side of the insulator is connected with a ball head hanging ring;

the ball head hanging ring is rotatably connected with a first connecting block, and the first connecting block is hinged with an adjacent connecting plate; the bowl head hanging ring is rotatably connected with the connecting plate.

Optionally, the insulating suspension member comprises a U-shaped screw, a yoke plate and three first U-shaped suspension loops; the U-shaped screws are fixedly connected with the linear tower, the first U-shaped hanging rings are hinged with the connecting plate, and one of the first U-shaped hanging rings is connected with the U-shaped screws in a sliding mode.

Optionally, the connecting plate close to the insulating suspension member is hinged with second U-shaped suspension rings, and the second U-shaped suspension rings are slidably connected with the first U-shaped suspension rings in a one-to-one correspondence.

Optionally, the connecting plate far away from the insulating hanger is hinged with a projection, and the clamping part comprises a wire clamp, a third U-shaped hanging ring, an adjusting plate and a second connecting block protruding from the wire clamp; the third U-shaped hanging ring is connected with the second connecting block in a sliding mode and is hinged with the adjusting plate;

the lug is provided with a sliding chute, and the adjusting plate is connected with the sliding chute in a sliding manner; the convex block is provided with an avoiding groove corresponding to the adjusting plate.

Optionally, the adjusting plate is provided with at least two adjusting holes for being hinged to the third U-shaped suspension loop, and the distances between the adjusting holes and the protruding block are different.

A strain section comprises two strain towers, at least one linear tower and at least one cable; the linear tower is located between the two tension towers, the linear tower is connected with the insulator string group, and the insulator string group is connected with the cable.

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

in the insulator string group and the strain section, an insulating suspension part is suspended on a linear tower and is connected with a clamping part through an insulating component, and the clamping part clamps a cable and supports the middle part of the cable. Because, insulating subassembly has improved insulating subassembly's terminal terrain clearance along setting up along the circuit direction to further improved the terrain clearance of pressing from both sides the portion of getting and the height of cable, improved the high utilization ratio of sharp shaft tower, thereby improved power line's security.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

The structure, proportion, size and the like shown in the drawings are only used for matching with the content disclosed in the specification, so that the person skilled in the art can understand and read the description, and the description is not used for limiting the limit condition of the implementation of the invention, so the method has no technical essence, and any structural modification, proportion relation change or size adjustment still falls within the scope of the technical content disclosed by the invention without affecting the effect and the achievable purpose of the invention.

Fig. 1 is a schematic overall structural diagram of a tension resistant section according to a second embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is another schematic overall structure diagram of the tension resistant section according to the third embodiment of the present invention;

fig. 4 is a schematic view of an overall structure of an insulator string set according to an embodiment of the present invention;

fig. 5 is a partial enlarged view of fig. 4 at B.

Illustration of the drawings: 1. a cable; 21. a linear tower; 22. a strain tower; 3. an insulating suspension member; 31. a U-shaped screw; 32. a yoke plate; 33. a first U-shaped suspension loop; 4. an insulating assembly; 41. a connecting plate; 42. an insulator; 43. hanging a ring at the bowl head; 44. a ball head hanging ring; 45. a first connection block; 46. a second U-shaped suspension loop; 47. a bump; 471. a chute; 472. an avoidance groove; 5. a gripping section; 51. wire clamps; 52. a third U-shaped suspension loop; 53. an adjustment plate; 54. and a second connecting block.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. It should be noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Referring to fig. 1 to 5, fig. 1 is a schematic view of an overall structure of a tension resistant section according to an embodiment of the present invention, fig. 2 is a partially enlarged view of a portion a of fig. 1, fig. 3 is another schematic view of an overall structure of a tension resistant section according to a third embodiment of the present invention, fig. 4 is a schematic view of an overall structure of an insulator string set according to an embodiment of the present invention, and fig. 5 is a partially enlarged view of a portion B of fig. 4.

Example one

The insulator string group provided by the embodiment of the invention is used for connecting the cable 1 and the linear tower 21 in an insulating manner, and particularly, the insulator string group is connected with the linear tower 21, the tail end of the insulator string group can clamp the cable 1, and the safety height of the cable 1 is effectively improved.

As shown in fig. 1 and 2, the insulator string set includes: two sets of insulation components 4 and one set of insulation suspension parts 3 for connecting the linear pole tower 21 and the insulation components 4; two sets of insulation assemblies 4 are respectively positioned at two sides of the insulation suspension part 3 along the circuit direction, the insulation assemblies 4 are arranged along the circuit direction, and one side of each insulation assembly 4, which is far away from the insulation suspension part 3, is connected with a clamping part 5 for clamping the cable 1. It should be noted that the forward circuit direction refers to a direction extending along the cable 1; the cable 1 comprises two sections of conducting wires and a jumper wire, wherein the jumper wire is a cable between the insulating assemblies 4, and the conducting wires are cables between the tension tower 22 and the insulating assemblies 4. An insulating hanger 3 is hung on the linear tower 21, the insulating hanger 3 is connected with a clamping part 5 through an insulating component 4, and the clamping part 5 clamps the cable 1 and supports the middle part of the cable 1. Because, insulating subassembly 4 sets up along following the circuit direction, the terminal terrain clearance of insulating subassembly 4 has been improved, thereby the terrain clearance of pressing from both sides portion 5 has been improved, the space utilization of insulator string group has been improved, under the unchangeable prerequisite of straight line shaft tower 21 height, the security of power line has been improved, it needs to supplement, the security in this embodiment not only means that the terrain clearance of cable 1 equals the safety standard, still include that terrain clearance is greater than the safety standard and make cable 1 can have certain self-adaptation ability in original design. On the other hand, for the established power line, the traditional suspension insulator is often adopted, and the insulator string group can replace the suspension insulator with low cost and high efficiency. When the topography of the terrain rises, in order to improve the safe height of the cable 1, the linear tower 21 is required to be rebuilt frequently, so that the safe height of the cable 1 is increased by the height of the linear tower 21, the suspension insulator is replaced by the insulator string group, the linear tower 21 is not required to be rebuilt, the suspension insulator is only required to be replaced by the insulator string group, the transformation cost of the effective power line is effectively reduced, the construction period is shortened, and the reliability of the power line is improved. In addition, because the insulator string group is arranged along the circuit, the moment arm of force of the cable 1 to the insulating suspension part 3 in the vertical direction is reduced, so that when the cable 1 is subjected to wind pressure, the moment of the wind pressure to the insulator string group is effectively reduced, the condition that the fault of a safe air gap is broken down due to insufficient electrical gap of the straight line tower 21 is avoided, and the integral stability and the wind pressure resistance are improved.

Further, as shown in fig. 4, the insulating assembly 4 includes two connecting plates 41 and at least two insulators 42, wherein one connecting plate 41 is connected to the insulating hanger 3, and the other connecting plate 41 is connected to the gripping part 5; insulators 42 are each located between the two connection plates 41, and serve to insulate and connect the two connection plates 41. The connecting plate 41 and the insulator 42 form a rectangle, one end is connected to the insulating hanger 3, the other end is connected to the gripping part 5, and the insulator 42 serves as an insulator and serves as a connecting plate 41. And through setting up two or more insulators 42, improve insulating assembly 4's stability, avoid insulating assembly 4 to damage under the tension effect of cable 1. It is understood that the insulating member 4 has other forms, for example, the insulating member 4 includes only two connecting plates 41 and one insulator 42, wherein one connecting plate 41 is connected to the insulating hanger 3 and the other connecting plate 41 is connected to the gripping part 5; insulators 42 are each located between the two connection plates 41, and serve to insulate and connect the two connection plates 41. The number of the insulation groups 4 is effectively reduced, so that the overall cost is saved, and the installation efficiency is improved.

Specifically, the number of the insulators 42 is two, and the insulators 42 are arranged side by side. The stress between the insulators 42 is ensured to be uniform, and the stability and the anti-pulling capacity of the insulation group 4 are improved. It should be added that the insulator 42 is FXBW4-110/100-B, and is a composite insulator, which has strong insulating ability, and certainly, the insulator 42 can also be of other types, such as a post porcelain insulator, which effectively increases the creepage distance and prevents the insulator string group from being punctured. In addition, the insulation group 4 has other types of insulator distribution, for example, the number of the insulators 42 is three, and the insulators are arranged in a triangular shape along the circuit direction, so that the triangular prism shape is not easy to twist and the average torsion is reduced, thereby effectively improving the twisting resistance of the insulation group 4. Also, two insulators 42 extend along the circuit direction, and further extend to clamp the part 5, so that the clamping point of the part 5 is closer to the next linear tower 21, the influence of the gravity of the cable 1 on the cable 1 is reduced, and the safety distance of the cable 1 is increased.

Further, one side of the insulator 42 is connected with a bowl head hanging ring 43, and the other side of the insulator 42 is connected with a ball head hanging ring 44; the ball head hanging ring 44 is rotatably connected with a first connecting block 45, and the first connecting block 45 is hinged with the adjacent connecting plate 41; the bowl head hanging ring 43 is rotatably connected with the connecting plate 41. Because insulator 42 is along the circuit setting, when receiving the wind load along the circuit direction, insulator 42 can swing along with the wind, because the quality of cable 1 and insulator 42 is different, so wind load effort between them is also different, and the wind load effort of cable 1 transmits to connecting plate 41, when the atress of connecting plate 41 and insulator 42 is uneven, leads to both fracture easily, leads to the fracture for preventing between connecting plate 41 and the insulator 42 the atress inequality. One end of the insulator 42 is connected with a bowl head hanging ring 43, and the other end is connected with a bulb head hanging ring 44, and the rotatability of the bowl head hanging ring 43 and the bulb head hanging ring 44 is balanced against the partial acting force of the joint of the bowl head hanging ring 43 and the bulb head hanging ring 44, so that the wind resistance of the insulation group 4 is improved.

Further, the insulating suspension member 3 comprises a U-shaped screw 31, a yoke plate 32 and three first U-shaped suspension loops 33; u type screw 31 and linear tower 21 fixed connection, first U type link 33 is articulated with yoke plate 32, and one of them first U type link 33 and U type screw 31 sliding connection. Specifically, the yoke plate 32 is triangular, hinge holes are respectively formed in the corners, the three first U-shaped hanging rings 33 are connected with the yoke plate 32 through hinges, and the first U-shaped rings 33 located at the high positions are slidably connected with the U-shaped screws 31, so that the insulation groups 4 are fixed within a certain height range, and the mobility of the insulation groups 4 is improved.

Further, the connecting plate 41 near the insulating suspension member 3 is hinged with second U-shaped suspension loops 46, and the second U-shaped suspension loops 46 are slidably connected with the first U-shaped suspension loops 33 in a one-to-one correspondence. Specifically, the second U-shaped suspension loop 46 of the left side insulation group 4 is slidably connected with the first U-shaped suspension loop on the left side of the yoke plate 32, as is the other side insulation group 4. Because the insulator string set is arranged outdoors and is easily influenced by various sudden loads, the impact caused by accidental approach of the insulation set 4 and the insulation hanger 3 is effectively reduced through the sliding connection of the second U-shaped hanging ring 46 and the first U-shaped hanging ring 33 in a one-to-one correspondence manner.

Further, the connecting plate 41 far away from the insulating hanging member 3 is hinged with a projection 47, and the clamping part 5 comprises a wire clamp 51, a third U-shaped hanging ring 52, an adjusting plate 53 and a second connecting block 54 which is convexly arranged on the wire clamp 51; the third U-shaped hanging ring 52 is slidably connected with the second connecting block 54, and the third U-shaped hanging ring 52 is hinged with the adjusting plate 53; the adjusting plate 53 is slidably connected to the connecting plate 41 via the projection 47. The projection 47 is provided with a chute 471, and the adjusting plate 53 is in sliding connection with the chute 471; the protrusion 47 is provided with an avoiding groove 472 corresponding to the adjusting plate 53. Specifically, the insulator string set is disposed outdoors and is susceptible to various sudden loads, the avoiding groove 472 is used for avoiding the sliding of the adjusting plate 53, the adjusting plate 53 is slidably connected with the sliding groove 471 through a pin or a bolt, the position relationship between the adjusting plate 53 and the bump 47 can be adaptively adjusted, the external deformation is avoided, the collision between the two is avoided, and the stability of the two is improved. In addition, the third U-shaped hanging ring 52 hinged to the adjusting plate 53 is slidably connected to the second connecting block 54, and similarly, the function of improving the flexibility of the gripping part 5 is also provided.

Further, the adjusting plate 53 is provided with at least two adjusting holes for being hinged to the third U-shaped hanging ring 52, and the distances between the adjusting holes and the convex block 47 are different. Specifically, the adjusting plate 53 is provided with five adjusting holes, the adjusting holes are arranged along the clockwise direction, and the adjusting holes are close to the second connecting block 54 along the clockwise direction. The third U-shaped hanging ring 52 can adjust the position of the wire clamp 51 relative to the insulating hanging part 3 by hinging different adjusting holes so as to adjust the clamping position of the wire clamp 51, so that the clamping part 5 has certain adjusting capacity, the model changing cost is reduced, and the position adjusting efficiency is improved.

In summary, the insulator string set provided by the embodiment of the invention can further improve the safety height of the cable 1, and meanwhile, the response speed of the strain section to the improvement of the terrain and topography is improved due to the rapid replacement of the strain section.

Example two

As shown in fig. 1, a tension resistant section provided in the second embodiment of the present invention includes two tension resistant towers 22, at least one linear tower 21, and at least one cable 1; the linear tower 21 is located between two tension towers 22, and the linear tower 21 is connected with the insulator string set as in the embodiment, and the insulator string set is connected with the cable 1. It should be added that the tension tower 22 is not identical in structure to the linear tower 21, and the tension tower 22 is also subjected to longitudinal and angular loads relative to the linear tower 21. Through the setting of insulator cluster group, when 21 high regulations on straight line shaft tower, effectively improved the safe height of cable 1, reduced the construction cost, improved construction speed.

In summary, the strain section is installed on a hillside, and on the premise that the type of the linear tower 21 is not changed, the cable 1 can effectively increase the ground height by the arrangement of the insulator string group, so that the height of the linear tower 21 is effectively utilized, and the safety is improved.

EXAMPLE III

As shown in fig. 3, another tension resistant section provided in the third embodiment of the present invention has the same structure as the tension resistant section provided in the second embodiment, but the tension resistant section in the third embodiment of the present invention is installed on a plain, and because there is no mountain ridge or tree sheltering on the plain, the wind load borne by the tension resistant section is larger, and through the arrangement of the insulator string set in the first embodiment, the offset direction of the insulation assembly 4 under the influence of the wind load is changed, so that the situation that the conductor part of the cable 1 approaches the linear tower 21 due to wind deflection does not occur, the breakdown of the safe air gap fault due to insufficient electrical gap of the linear tower 21 is avoided, and the wind deflection fault capability of the whole tension resistant section is improved.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A insulator string set for insulatively connecting a cable (1) and a linear tower (21), the insulator string set comprising: two sets of insulation components (4) and one set of insulation suspension parts (3) for connecting the linear tower (21) and the insulation components (4);

the two sets of insulation assemblies (4) are respectively positioned on two sides of the insulation suspension part (3) along the circuit direction, the insulation assemblies (4) are arranged along the circuit direction, and one side, far away from the insulation suspension part (3), of each insulation assembly (4) is connected with a clamping part (5) used for clamping the cable (1).

2. A string according to claim 1, characterised in that the insulating assembly (4) comprises two connecting plates (41) and at least two insulators (42), one of the connecting plates (41) being connected to the insulating suspension member (3) and the other connecting plate (41) being connected to the gripping portion (5); the insulators (42) are located between the two connecting plates (41) and used for insulating and connecting the two connecting plates (41).

3. A string set according to claim 2, characterised in that the number of insulators (42) is two, the insulators (42) being arranged side by side.

4. A string set according to claim 2, wherein one side of the insulator (42) is connected with a bowl-head suspension loop (43), and the other side of the insulator (42) is connected with a bulb-head suspension loop (44);

the ball head hanging ring (44) is rotatably connected with a first connecting block (45), and the first connecting block (45) is hinged with the adjacent connecting plate (41); the bowl head hanging ring (43) is rotatably connected with the connecting plate (41).

5. A string according to claim 2, characterised in that the dielectric suspension member (3) comprises a U-shaped screw (31), a yoke plate (32) and three first U-shaped suspension loops (33); the U-shaped screw (31) is fixedly connected with the linear tower (21), the first U-shaped hanging ring (33) is hinged to the connecting plate (32), and one of the first U-shaped hanging ring (33) is connected with the U-shaped screw (31) in a sliding mode.

6. A insulator string group according to claim 5, characterised in that the connecting plate (41) near the insulating suspension member (3) is hinged with a second U-shaped suspension loop (46), the second U-shaped suspension loop (46) being slidably connected with the first U-shaped suspension loop (33) in a one-to-one correspondence.

7. A insulator string set according to claim 2, wherein the connecting plate (41) remote from the insulating suspension member (3) is hinged with a lug (47), and the gripping part (5) comprises a wire clamp (51), a third U-shaped suspension loop (52), an adjusting plate (53) and a second connecting block (54) protruding from the wire clamp (51); the third U-shaped hanging ring (52) is connected with the second connecting block (54) in a sliding mode, and the third U-shaped hanging ring (52) is hinged to the adjusting plate (53);

the bump (47) is provided with a sliding chute (471), and the adjusting plate (53) is in sliding connection with the sliding chute (471); the convex block (47) is provided with an avoiding groove (472) corresponding to the adjusting plate (53).

8. A insulator string group according to claim 7, wherein the adjusting plate (53) is provided with at least two adjusting holes for hinging with the third U-shaped suspension ring (52), and the distances of the adjusting holes relative to the convex block (47) are different.

9. A strain section is characterized by comprising two strain towers (22), at least one linear tower (21) and at least one cable (1); the linear tower (21) is located between two tension towers (22), the linear tower (21) is connected with the insulator string set according to any one of claims 1-9, and the insulator string set is connected with the cable (1).