Heavy ice area low-temperature-resistant strain fitting assembly

Abstract

The utility model discloses a heavy ice area low temperature resistant tension fitting assembly comprising a pair of disc-shaped suspension insulators, the head and tail ends of the disc-shaped suspension insulators are provided with triangular yoke plates, the triangular yoke plates are provided with connecting holes close to the tips, a connection yoke plate is connected between the two triangular yoke plates located at the tail ends, and the connection yoke plate is provided with a connecting hole. The front surface and the rear surface of the connecting yoke plate are symmetrically provided with a set of third concave grooves, the third concave grooves are formed in the side edges of the connecting yoke plate in the length direction, and first concave grooves are formed in one sides of the third concave grooves. The fence ribs protrude out of the surface of the hardware fitting yoke plate, so that a fence-shaped structure is formed, when the hardware fitting is in a horizontal state, molten snow water or rainwater on the surface of the hardware fitting can be prevented from flowing to a connecting point through the fence ribs, and when the hardware fitting is in a vertical state, the fence ribs have the effect similar to an eave and play a role in shielding and protecting the connecting point. And the snow is prevented from falling at the connecting point and being condensed into ice.

Description

Technical Field

[0001] The utility model belongs to the field of electric power fittings, and particularly relates to a tension fitting assembly for heavy ice areas with low temperature resistance. Background Art

[0002] In order to meet the requirements of social and economic development for grid capacity and reliability, strengthen the west-to-east power transmission hub, and develop UHV DC has become a major trend in grid construction. The UHV DC line has a high transmission capacity, a large conductor cross-section, a large number of splits, and a heavy insulator load. Developing a high-strength and high-reliability tension insulator string type for heavy ice areas is a problem that must be solved in the design.

[0003] Chinese invention patent CN102097189B discloses a ±800KV four-circuit tension string for heavy ice areas. The suspension fitting at the hanging point still uses the Italian pie-shaped hanging point. This hanging point structure is compact, rotates flexibly, and has reasonable stress, especially suitable for heavy ice area lines. The string arrangement uses a combined link plate to complete the six-split wiring. Support frames are installed at the combined link plate of the upper and lower layers of the fitting string to improve the stability of the overall structure and the load-bearing capacity.

[0004] From the above prior art, it can be seen that most of the existing tension fittings used for heavy ice areas only consider their stability in low-temperature environments. However, in the heavy ice area environment, the falling snow or rainwater is easy to gather at the connection between the tension fitting and the conventional fitting connector. In a low-temperature environment, the snow and rainwater are easy to condense into ice, resulting in a large number of ice columns formed at the joint position, affecting the normal use of the fitting. Summary of the Utility Model

[0005] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the application, to avoid obscuring the purpose of this part, the abstract, and the title. However, such simplifications or omissions shall not be used to limit the scope of the utility model.

[0006] In order to solve the problems existing in the above background art, the utility model adopts the following technical solutions.

[0007] A low-temperature and tension-resistant hardware component for heavy ice areas comprises a pair of disc-shaped suspension insulators, both ends of the disc-shaped suspension insulators are equipped with triangular connecting plates, connecting holes are provided near the tip of the triangular connecting plates, a connecting connecting plate is connected between the two triangular connecting plates at the tail ends, a group of third depressions are symmetrically provided on the front and rear surfaces of the connecting connecting plates, the third depressions are provided at the side edges in the length direction of the connecting connecting plates, a first depression is provided on one side of the third depression, and fourth depressions are provided at both ends of the right-angled sides of the front and rear surfaces of the triangular connecting plates; first ribs are provided on the surface of the connecting connecting plates and at the edges of the first and third depressions, a second rib is provided at the edge of the fourth depression, and both the first rib and the second rib are strip-shaped structures.

[0008] Preferably, a second groove is provided in the first groove, and mounting holes are provided on the first groove, the second groove, the third groove and the fourth groove.

[0009] Preferably, a first protrusion is integrally connected to the side edge in the length direction of the connecting plate and located on the lower surface of the first groove, a second protrusion is integrally connected to the lower surface of the second groove, and a third protrusion is integrally connected to the lower surface of the third groove. The first protrusion, the second protrusion and the third protrusion are all semicircular structures, and the diameters of the first protrusion and the third protrusion are equal, the diameter of the second protrusion is smaller than the diameter of the first protrusion, and the mounting hole is opened at the center of the first protrusion, the second protrusion and the third protrusion.

[0010] Preferably, the other long side of the connecting plate has an arc-shaped profile, arc-shaped protruding points are provided at both ends of the arc-shaped side, through holes are opened on the protruding points, and reinforcing ribs are provided on both side surfaces of the connecting plate.

[0011] Preferably, the protruding point is connected to a parallel hanging plate by a through hole, and the connecting connecting plate is connected to a connecting hole of a triangular connecting plate located at the tail end of the disc-shaped suspension insulator through the parallel hanging plate.

[0012] Preferably, a semicircular fourth protrusion is integrally connected on the surface of the triangular connecting plate and located on the lower surface of the fourth groove, and the connecting hole provided on the triangular connecting plate is located at the center of the fourth protrusion.

[0013] Preferably, a right-angle hanging plate is pinned on the fourth protrusion of the triangular connecting plate located at the head end of the disc-shaped suspension insulator, and the end of the right-angle hanging plate is connected to a ball head hanging plate by bolts, the other end of the ball head hanging plate is connected to one end of the disc-shaped suspension insulator, the other end of the disc-shaped suspension insulator is equipped with a bowl head hanging plate, and the disc-shaped suspension insulator is connected to the triangular connecting plate located at the tail end of the disc-shaped suspension insulator by the bowl head hanging plate.

[0014] Preferably, the two triangular connecting plates at the tail ends are both provided with equalizing rings for preventing the generation of corona phenomenon.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] (1) At the connection between the connecting link plate and other conventional fitting connectors of the present utility model, and around the connection between the triangular link plate and other conventional fitting connectors, a retaining rib is provided. The retaining rib protrudes from the surface of the fitting link plate, thus forming a fence-like structure. When the fitting is in a horizontal state, the retaining rib can prevent melted snow water or rainwater from flowing towards the connection point, avoiding the condensation of this water into ice in a low-temperature environment, which may cause structural damage to the key connection point. When the fitting is in a vertical state, the retaining rib acts like an eaves, providing a shielding and protective effect on the connection point to prevent snow from falling on the connection point and condensing into ice.

[0017] (2) Since both the connecting link plate and the triangular link plate are connected to the conventional fitting connectors through grooves, it can be seen that both the connecting link plate and the triangular link plate of the present utility model are thickened designs. Severe icing is likely to occur in alpine regions. The thickened design of the present utility model effectively ensures the stability of the fitting components during use and meets the requirements of large-span high-voltage power transmission in alpine regions.

[0018] (3) Further, since other conventional fitting connectors are all standard parts, the thickened designs of the connecting link plate and the triangular link plate of the present utility model cannot be directly assembled with the conventional fitting connectors. To eliminate this defect, the present utility model performs cutting on the connection parts of the connecting link plate and the triangular link plate to form grooves, so as to meet the normal assembly requirements with other conventional fitting connectors, with strong practicability and high operability in implementation and application.

[0019] (4) Still further, the retaining rib of the present utility model also functions as a reinforcing rib, further enhancing the structural strength of the connecting link plate and the triangular link plate, and further enhancing the stability of the fitting components during use. Description of the Drawings

[0020] Figure 1 It is an overall structure diagram of the present utility model in the front direction.

[0021] Figure 2 It is a side view of the present utility model.

[0022] Figure 3 It is a plan view of the connecting link plate of the present utility model.

[0023] Figure 4 It is a three-dimensional view of the connecting link plate of the present utility model.

[0024] Figure 5 It is a plan view of the triangular link plate of the present utility model.

[0025] Figure 6 It is a three-dimensional view of the triangular link plate of the present utility model.

[0026] The corresponding relationships between the reference signs in the figures and the component names are as follows:

[0027] 100, disc suspension insulator; 101, ball head hanger; 102, right angle hanger; 103, grading ring; 104, socket head hanger; 105, parallel hanger; 200, connecting link plate; 201, reinforcing rib; 202, first protrusion; 2021, first groove; 203, second protrusion; 2031, second groove; 204, third protrusion; 2041, third groove; 205, first retaining rib; 300, triangular link plate; 301, connecting hole; 302, fourth protrusion; 3021, fourth groove; 3022, second retaining rib. Detailed implementation manners

[0028] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following detailed description of the specific implementation manners of the present utility model will be given in conjunction with the accompanying drawings of the specification.

[0029] In the following description, many specific details are set forth to facilitate a thorough understanding of the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0030] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that can be included in at least one implementation manner of the present utility model. The appearances of "in one embodiment" in different places in this specification do not all refer to the same embodiment, nor are they separate or alternative embodiments that exclude each other from other embodiments. The present utility model provides the following embodiments.

[0031] Figure 1 and Figure 2This is the structural diagram of the low-temperature and ice-resistant tension clamp assembly in this embodiment. The low-temperature and ice-resistant tension clamp assembly in this embodiment includes a pair of disc suspension insulators 100. Triangular gusset plates 300 are assembled at both the head and tail ends of the disc suspension insulators 100. An adapter gusset plate 200 is connected between the two triangular gusset plates 300 at the tail end. In this embodiment, one end of the triangular gusset plate 300 is connected to the disc suspension insulator 100, and the other end is connected to the electric tower through other fitting connectors. The other end of the disc suspension insulator 100 is connected to the adapter gusset plate 200. Through the adapter gusset plate 200, multiple transmission lines can be connected, so that the tension clamp composed of the disc suspension insulator 100, the adapter gusset plate 200, and the triangular gusset plate 300 in this embodiment can assemble multiple transmission lines at one time, making the utilization rate of the fitting better. At the same time, in order to improve the annular protection of the voltage distribution on the disc suspension insulator 100, a grading ring 103 is sleeved outside the disc suspension insulator 100 in this embodiment, and the end of the grading ring 103 is fixed on the triangular gusset plate 300 connected to the adapter gusset plate 200 by screws. At the same time, in order to be able to use better in the heavy ice area, in this embodiment, the triangular gusset plate 300 and the adapter gusset plate 200 are thickened on the existing thickness to meet the requirements of the fittings used in the heavy ice area in the large-span high-voltage transmission project.

[0032] Refer to Figure 3 and Figure 5 , since the conventional fitting connectors are usually standard parts, the connection space between the fitting connectors and the fittings is limited. Therefore, the thickened triangular gusset plate 300 and adapter gusset plate 200 in this embodiment cannot be adapted to the standard conventional fitting connectors. In order to eliminate this defect, a set of third grooves 2041 are symmetrically opened on the front and rear surfaces of the adapter gusset plate 200 in this embodiment. The third grooves 2041 are specifically opened at the side edges in the length direction of the adapter gusset plate 200. A first groove 2021 is opened on one side of the third grooves 2041. Fourth grooves 3021 are opened at both ends of the right-angled sides on the front and rear surfaces of the triangular gusset plate 300. In this embodiment, the first groove 2021, the third groove 2041, and the fourth groove 3021 formed by cutting are all arranged at the connection points of the fittings, so as to reduce the local thickness of the fittings to the same as the thickness of the existing standardized fittings, so as to meet the installation of the standardized conventional fitting connectors. Further, a second groove 2031 is also opened in the first groove 2021, so that the traction of the adjacent two transmission lines installed on the fittings is not in the same plane, so as to prevent the subsequent water from contacting another conventional fitting connector along the ice ridge after the water droplets condense into ice ridges during rainfall or snowfall, causing the adjacent two fitting connectors to be frozen together by ice;

[0033] Refer to Figure 4 and Figure 6, to prevent a large amount of rain or snow water from passing through the connection points of the fittings and causing serious icing, in this embodiment, first retaining ribs 205 are provided on the surface of the connecting link plate 200 at the edges of the first groove 2021 and the third groove 2041, and a second retaining rib 3022 is provided at the edge of the fourth groove 3021. Both the first retaining rib 205 and the second retaining rib 3022 are strip-shaped structures. In this embodiment, the first retaining rib 205 protrudes from the surface of the connecting link plate 200, and the second retaining rib 3022 protrudes from the surface of the triangular link plate 300, thus forming a fence-like structure. When the triangular link plate 300 and the connecting link plate 200 are in a horizontal state, the first retaining rib 205 and the second retaining rib 3022 can prevent the melted snow water or rain water on the surfaces of the triangular link plate 300 and the connecting link plate 200 from flowing to the connection points and condensing into ice in a low-temperature environment, causing structural damage at the key connection points; when the triangular link plate 300 and the connecting link plate 200 are in a vertical state, the retaining ribs have a function similar to that of an eave, playing a role of shielding and protecting the connection points to prevent snow from falling on the connection points and condensing into ice.

[0034] Refer to Figures 3 - 6 , in this embodiment, mounting holes are provided in the first groove 2021, the second groove 2031, the third groove 2041, and the fourth groove 3021 to facilitate the assembly with conventional fitting connectors. Further, to ensure that the conventional fitting connectors can be better connected to the triangular link plate 300 and the connecting link plate 200 in this embodiment, making the connection more stable, in this embodiment, a first protrusion 202 is integrally connected to the lower surface of the first groove 2021 on the side edge in the length direction of the connecting link plate 200, a second protrusion 203 is integrally connected to the lower surface of the second groove 2031, and a third protrusion 204 is integrally connected to the lower surface of the third groove 2041; on the surface of the triangular link plate 300, a fourth protrusion 302 is integrally connected to the lower surface of the fourth groove 3021. The first protrusion 202, the second protrusion 203, the third protrusion 204, and the fourth protrusion 302 are all semi-circular structures. By the first protrusion 202, the second protrusion 203, the third protrusion 204, and the fourth protrusion 302, the contact area between the triangular link plate 300 and the connecting link plate 200 and the fitting connector is increased, making the connection more stable. Moreover, the diameters of the first protrusion 202 and the third protrusion 204 are equal for connecting conventional fitting connectors with the same limit number, and the diameter of the second protrusion 203 is smaller than that of the first protrusion 202 for connecting conventional fitting connectors of a smaller size. The mounting holes are opened at the centers of the first protrusion 202, the second protrusion 203, the third protrusion 204, and the fourth protrusion 302.

[0035] Refer to Figure 5 and Figure 6, during use, one end of the connecting link plate 200 can be connected to multiple conventional fitting connectors. To ensure that the force can be transmitted through the two connection points at the other two ends of the connecting link plate 200, in this embodiment, the contour of the other long side of the connecting link plate 200 is an arc structure. Arc-shaped protruding points are provided at both ends of the arc-shaped side, and through holes are provided on the protruding points. Reinforcing ribs 201 are provided on both sides of the connecting link plate 200 to enhance the overall strength. The protruding points are connected with parallel hanging plates 105 through the through holes, and the connecting link plate 200 is connected to the connection hole 301 of the triangular link plate 300 located at the end of the disc suspension insulator 100 through the parallel hanging plates 105.

[0036] Refer to Figure 1 and Figure 2 , the conventional fitting connectors in this embodiment include but are not limited to right-angle hanging plates 102, ball head hanging plates 101, and bowl head hanging plates 104. The specific assembly is as follows: A right-angle hanging plate 102 is pinned to the fourth protrusion 302 of the triangular link plate 300 located at the head end of the disc suspension insulator 100, and a ball head hanging plate 101 is connected to the end of the right-angle hanging plate 102 by bolts. The other end of the ball head hanging plate 101 is connected to one end of the disc suspension insulator 100. A bowl head hanging plate 104 is assembled at the other end of the disc suspension insulator 100, and the disc suspension insulator 100 is connected to the triangular link plate 300 located at the end of the disc suspension insulator 100 by using the bowl head hanging plate 104. Through each conventional fitting connector, the fitting is well connected to the transmission line and the iron tower.

[0037] The above content further elaborates on the present invention in combination with specific embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, which should all be regarded as falling within the protection scope determined by the claims submitted for the present invention.

Claims

1. A low-temperature and tensile-resistant fitting assembly for heavy ice areas, comprising a pair of disc suspension insulators (100). Triangular gusset plates (300) are assembled at both the head and tail ends of the disc suspension insulators (100). A connection hole (301) is provided near the tip of the triangular gusset plate (300). An adapter gusset plate (200) is connected between the two triangular gusset plates (300) at the tail end position. It is characterized in that: A set of third recesses (2041) are symmetrically provided on the front and rear surfaces of the adapter gusset plate (200). The third recesses (2041) are provided at the side edges in the length direction of the adapter gusset plate (200). A first recess (2021) is provided on one side of the third recesses (2041). Fourth recesses (3021) are provided at both ends of the right-angled sides on the front and rear surfaces of the triangular gusset plate (300). First ribs (205) are provided at the edges of the first recess (2021) and the third recesses (2041) on the surface of the adapter gusset plate (200). Second ribs (3022) are provided at the edges of the fourth recesses (3021). The first ribs (205) and the second ribs (3022) are both strip-shaped structures.

2. The low-temperature and tensile force-resistant hardware component for heavy icing areas according to claim 1, wherein: A second recess (2031) is further provided in the first recess (2021). Mounting holes are provided in the first recess (2021), the second recess (2031), the third recesses (2041), and the fourth recesses (3021).

3. The low-temperature and tensile force-resistant hardware component for heavy icing areas according to claim 2, characterized in that: A first protrusion (202) is integrally connected to the lower surface of the side edge in the length direction of the adapter gusset plate (200) and at the lower surface of the first recess (2021). A second protrusion (203) is integrally connected to the lower surface of the second recess (2031). A third protrusion (204) is integrally connected to the lower surface of the third recesses (2041). The first protrusion (202), the second protrusion (203), and the third protrusion (204) are all semi-circular structures. The diameters of the first protrusion (202) and the third protrusion (204) are equal. The diameter of the second protrusion (203) is smaller than the diameter of the first protrusion (202). The mounting holes are provided at the centers of the first protrusion (202), the second protrusion (203), and the third protrusion (204).

4. The low-temperature and tensile force-resistant hardware component for heavy icing areas according to claim 1, wherein: The contour of the other long side edge of the adapter gusset plate (200) is an arc structure. Arc-shaped protruding points are provided at both ends of the arc-shaped side edge. Through holes are provided in the protruding points. Reinforcing ribs (201) are provided on both sides of the adapter gusset plate (200).

5. The low-temperature and tensile strength-resistant hardware assembly for heavy icing areas according to claim 4, characterized in that: The protruding points are connected to a parallel hanger plate (105) through the through holes. The adapter gusset plate (200) is connected to the connection hole (301) of the triangular gusset plate (300) at the tail end position of the disc suspension insulator (100) through the parallel hanger plate (105).

6. The low-temperature and tensile-strength-resistant hardware component for heavy ice areas according to claim 2, characterized in that: A semi-circular fourth protrusion (302) is integrally connected to the lower surface of the triangular gusset plate (300) and at the lower surface of the fourth recess (3021). The connection hole provided on the triangular gusset plate (300) is located at the center of the fourth protrusion (302).

7. The low-temperature resistant and tensile strength resistant hardware component for heavy icing areas according to claim 6, wherein: A right-angle hanging plate (102) is pin-connected to the fourth protrusion (302) of a triangular connecting plate (300) at the head end position of a disc suspension insulator (100), and a ball head hanging plate (101) is connected to the end of the right-angle hanging plate (102) by a bolt. The other end of the ball head hanging plate (101) is connected to one end of the disc suspension insulator (100). A bowl head hanging plate (104) is assembled at the other end of the disc suspension insulator (100), and the disc suspension insulator (100) is connected to a triangular connecting plate (300) at the tail end position of the disc suspension insulator (100) by means of the bowl head hanging plate (104).

8. A low-temperature and tensile-resistant hardware component for heavy ice areas according to claim 1, characterized in that: Equalizing rings (103) for preventing corona are installed on both of the triangular connecting plates (300) at the tail end positions.

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