Heavy ice area disc-shaped suspension insulator quadruple double-hanging-point strain insulator string

Abstract

The utility model discloses a heavy ice area disc-shaped suspension insulator quadruple double-hanging-point tension string which comprises a tension fitting assembly, one end of the tension fitting assembly is provided with an iron tower end connecting fitting, the other end of the tension fitting assembly is provided with a power transmission line end connecting fitting, the tension fitting assembly comprises a pair of disc-shaped suspension insulators, and the pair of disc-shaped suspension insulators is provided with an iron tower end connecting fitting and a power transmission line end connecting fitting. Triangular yoke plates are assembled at the head end and the tail end of the disc-shaped suspension insulator, a connecting yoke plate is connected between the two triangular yoke plates located at the tail end of the disc-shaped suspension insulator, and connecting holes are formed in the positions, close to the tip ends, of the triangular yoke plates. According to the utility model, the connection yoke plate and the triangular yoke plate in the strain string both adopt thickened design, and are connected with other hardware fitting connecting pieces through the bar-type groove structures, so that the mechanical strength of the whole strain string is improved, and the probability of icing at the joints of the strain hardware fitting and other hardware fitting connecting pieces is greatly reduced at the same time.

Description

Technical Field

[0001] The utility model belongs to the field of electric power fittings, and particularly relates to a four - unit double - suspension - point strain string of disc suspension insulators in heavy - ice areas. Background Technique

[0002] In order to meet the requirements of social and economic development for grid capacity and reliability, strengthen the power hub of "transmitting electricity from the west to the east", and develop UHV DC has become a major trend in grid construction. UHV DC lines have high transmission capacity, large conductor cross - section, many sub - conductors, and heavy insulator loads. Developing a strain insulator string type with high strength and high reliability in heavy - ice areas is a problem that must be solved in the design.

[0003] Chinese invention patent CN102097189B discloses a four - unit strain string in heavy - ice areas of ± 800KV. The suspension fitting still uses an Italian - pie - type suspension point. This suspension point has a compact structure, flexible rotation, and reasonable force. It is 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 fitting strings to improve the stability of the overall structure and the load - bearing capacity.

[0004] It can be seen from the above - mentioned prior art that the stability of the strain fittings used in the ice - snow environment needs to be considered. The existing specifications of strain fittings cannot meet the use requirements in heavy - ice areas. Moreover, in the heavy - ice area environment, snowflakes or rain falling are easy to gather at the connection between the strain fittings and the transmission line fittings. In a low - temperature environment, snowflakes and rain are easy to condense into ice, causing a large number of ice columns to form at the joint position, affecting the normal use of the fittings. Content 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 of the specification and the title of the utility model of this application, to avoid obscuring the purpose of this part, the abstract of the specification, and the title of the utility model. However, such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] A four - unit double - suspension - point strain string of disc suspension insulators for heavy - ice areas, comprising a strain fitting assembly. One end of the strain fitting assembly is equipped with a tower - end connecting fitting, and the other end of the strain fitting assembly is equipped with a transmission - line - end connecting fitting. The strain fitting assembly includes a pair of disc suspension insulators. Triangular connecting plates are assembled at both the head and tail ends of the disc suspension insulators. An adapter connecting plate is connected between the two triangular connecting plates at the tail - end position of the disc suspension insulators. Connecting holes are provided near the tips of the triangular connecting plates. First protrusions are provided at the other two ends of the triangular connecting plates. First grooves are cut on both the front and back surfaces of the first protrusions. A plurality of second protrusions are equidistantly arranged along the edge of the adapter connecting plate in the length direction. A third protrusion is further provided on one side of the outermost second protrusion of the adapter connecting plate. Second grooves are cut on both the front and back surfaces of the second protrusions. The third protrusion is located within the second groove, and third grooves are cut on both the front and back surfaces of the third protrusion.

[0008] Preferably, connecting holes are provided at the centers of the first protrusion, the second protrusion, and the third protrusion. First ribs are provided at the edges of the first grooves, and second ribs are provided at the edges of the second grooves. Both the first ribs and the second ribs are strip - shaped structures.

[0009] Preferably, the contour of the other long side of the adapter connecting plate is an arc - shaped structure. Arc - shaped protruding points are provided at both ends of the arc - shaped side. Through - holes are provided on the protruding points. Reinforcing ribs are provided on both side surfaces of the adapter connecting plate. A first shielding ring is installed on the adapter connecting plate.

[0010] Preferably, the protruding point is connected to a first parallel hanging plate through the through - hole, and the adapter connecting plate is connected to the connecting hole of the triangular connecting plate at the tail - end position of the disc suspension insulator through the first parallel hanging plate.

[0011] Preferably, a right - angle hanging plate is pinned on the first protrusion of the triangular connecting plate at the head - end position of the disc suspension insulator. The end of the right - angle hanging plate is connected to a ball - head hanging plate by a bolt. The other end of the ball - head hanging plate is connected to one end of the disc suspension insulator. A bowl - head hanging plate is assembled at the other end of the disc suspension insulator. The disc suspension insulator is connected to the triangular connecting plate at the tail - end position of the disc suspension insulator through the bowl - head hanging plate.

[0012] Preferably, a grading ring for preventing corona is installed on the triangular connecting plate at the tail - end position of the disc suspension insulator.

[0013] Preferably, the tower - end connecting fitting includes a traction plate. The traction plate is connected to the connecting hole on the triangular connecting plate at the head - end position of the disc suspension insulator. The outer end of the traction plate is connected to a PT adjusting plate by a bolt. The outer end of the PT adjusting plate is movably connected to a second parallel hanging plate. One end of the second parallel hanging plate is connected to a first DB adjusting plate. A pair of interconnected first U - shaped hanging rings are provided at the front end of the first DB adjusting plate.

[0014] Preferably, the transmission line end connection fitting includes a strain clamp. A first spacer is fixedly connected to the upper end of the strain clamp. A second U-shaped hanging ring is provided at one end of the strain clamp. A second DB adjusting plate is assembled on the second U-shaped hanging ring. One end of the second DB adjusting plate is connected to an extension rod. A fastener is provided at the end of the extension rod connected to the second DB adjusting plate. A pair of second shielding rings are provided at the tail of the strain clamp, and a second spacer is provided on the second shielding ring.

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

[0016] (1) Severe icing is likely to occur in alpine regions, which poses high requirements for the mechanical strength of the strain string. In the strain fitting of the strain string of the present utility model, both the connecting link plate and the triangular link plate of the strain fitting are thickened in design and are connected to other fitting connectors through a ribbed groove structure. In this way, while improving the mechanical strength of the entire strain string, the probability of icing is also significantly reduced. It effectively ensures the stability of the strain string during use and meets the large-span high-voltage power erection requirements in alpine regions.

[0017] (2) Ribs are provided at the connection between the connecting link plate and other conventional fitting connectors, and around the connection between the triangular link plate and other conventional fitting connectors. The ribs protrude from the surface of the fitting link plate, thus forming a fence-like structure. When the fitting is in a horizontal state, the ribs can prevent melted snow water or rainwater from flowing towards the connection point, avoiding the freezing of this water flow 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 ribs act like an eave, playing a role of shielding and protecting the connection point to prevent snow from falling on the connection point and freezing into ice.

[0018] (3) Since other conventional fitting connectors are all standard parts, the thickened design of the connecting link plate and the triangular link plate of the present utility model cannot be directly assembled with conventional fitting connectors. To eliminate this defect, the present utility model cuts the connection between the connecting link plate and the triangular link plate to form a groove, so as to meet the normal assembly requirements of other conventional fitting connectors. It has strong practicability and strong operability in implementation and application. The ribs of the present utility model also act as reinforcing ribs, further improving the structural strength of the connecting link plate and the triangular link plate, and further enhancing the stability of the fitting assembly during use. Description of the Drawings

[0019] Figure 1 It is the overall structure diagram of the present utility model in the front direction.

[0020] Figure 2 It is the side view of the present utility model.

[0021] Figure 3 It is the overall structure diagram of the strain fitting assembly of the present utility model.

[0022] Figure 4 This is a three-dimensional view of the connecting link plate of the present utility model.

[0023] Figure 5 This is a three-dimensional view of the triangular link plate of the present utility model.

[0024] The corresponding relationship between the reference numerals and the component names in the figure is as follows:

[0025] 100, strain hardware assembly; 1001, right-angle hanging plate; 1002, ball head hanging plate; 1003, socket head hanging plate; 1004, first parallel hanging plate; 101, triangular link plate; 1011, connection hole; 1012, first protrusion; 1013, first rib; 1014, first groove; 102, disc suspension insulator; 103, grading ring; 104, connecting link plate; 1041, reinforcing rib; 1042, second protrusion; 1043, third protrusion; 1044, second rib; 1045, second groove; 1046, third groove; 1047, first shielding ring;

[0026] 200, tower end connection fitting; 201, first U-shaped hanging ring; 202, first DB adjusting plate; 203, second parallel hanging plate; 204, PT adjusting plate; 205, traction plate;

[0027] 300, transmission line end connection fitting; 301, strain clamp; 302, first spacer; 303, second U-shaped hanging ring; 304, second DB adjusting plate; 305, fastener; 306, extension rod; 307, second shielding ring; 308, second spacer. Specific embodiments

[0028] In order to make the above objects, features, and advantages of the present utility model more obvious and understandable, the specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings of the specification.

[0029] In the following description, many specific details are set forth in order to fully understand 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 "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that mutually excludes other embodiments. The present utility model provides the following embodiments.

[0031] Figure 1 andFigure 2 The present embodiment is a quadruple double-hanging-point tension string of disc-shaped suspension insulators in heavy ice areas. The quadruple double-hanging-point tension string in the present embodiment includes a tension fitting assembly 100. One end of the tension fitting assembly 100 is equipped with a tower-end connecting fitting 200, and the other end of the tension fitting assembly 100 is equipped with a transmission line-end connecting fitting 300. In the present embodiment, the power installation in the heavy ice area is realized by the tension fitting assembly 100. In order to be able to be better used in the heavy ice area, the tension fitting assembly 100 in the present embodiment is thickened on the basis of the existing thickness to meet the demand for fittings used in the heavy ice area in the large-span high-voltage power transmission project, and the tower-end connecting fitting 200 connected to the tower and the transmission line-end connecting fitting 300 assembled with the transmission line are respectively connected to the two ends of the tension fitting assembly 100.

[0032] See also Figure 3 The tension fitting assembly 100 in this embodiment includes a pair of disc-shaped suspension insulators 102, both ends of the disc-shaped suspension insulator 102 are equipped with triangular connecting plates 101, and a connecting connecting plate 104 is connected between the two triangular connecting plates 101 located at the tail end of the disc-shaped suspension insulator 102. A connecting hole 1011 is opened near the tip of the triangular connecting plate 101. In this embodiment, the force can be concentrated by the triangular connecting plate 101, thereby ensuring the stability of the entire fitting mechanism, and multiple transmission lines can be suspended by using the connecting connecting plate 104, so that the utilization rate of the fitting is better; at the same time, in order to improve the annular protection of the voltage distribution on the disc-shaped suspension insulator 102, in this embodiment, a grading ring 103 for preventing the generation of corona is installed on the triangular connecting plate 101 located at the tail end of the disc-shaped suspension insulator 102, and the end of the grading ring 103 is fixed to the triangular connecting plate 101 connected to the connecting connecting plate 104 by screws.

[0033] See also Figure 4 and Figure 5, usually the connecting fittings are standard parts. Therefore, the connection space between the standard parts and the strain fittings assembly in this embodiment is limited. As a result, the thickened triangular gusset plate 101 and the connecting gusset plate 104 in this embodiment cannot meet the adaptation with standard components. To eliminate this defect, first protrusions 1012 are provided at both ends of the triangular gusset plate 101. First grooves 1014 are cut on the front and rear surfaces of the first protrusions 1012. A plurality of second protrusions 1042 are equidistantly arranged along the edge of the connecting gusset plate 104 in the length direction. A third protrusion 1043 is also provided on one side of the second protrusion 1042 located on the outermost side of the connecting gusset plate 104. Second grooves 1045 are cut on the front and rear surfaces of the second protrusions 1042. The third protrusion 1043 is located in the second groove 1045. Third grooves 1046 are cut on the front and rear surfaces of the third protrusion 1043. Connection holes are opened at the centers of the first protrusion 1012, the second protrusion 1042, and the third protrusion 1043. In this embodiment, the local thickness of the fitting is reduced to the same as that of the existing standardized fitting through the second groove 1045 and the second groove 1045, so as to meet the installation of the standardized transmission line fitting connector. Further, through the third groove 1046, the adjacent two transmission line tractions installed on the fitting are not in the same plane. Thus, when rain or snow falls, after the water droplets condense into ice crystals, the subsequent water will not flow along the ice crystals to contact another transmission line fitting connector, causing the adjacent two fitting connectors to be frozen together by ice. Additionally, by providing the first protrusion 1012, the second protrusion 1042, and the third protrusion 1043, the contact area between the triangular gusset plate 101 and the connecting gusset plate 104 and the fitting connector is increased, making the connection more stable. Further, a first retaining rib 1013 is provided at the edge of the first groove 1014, and a second retaining rib 1044 is provided at the edge of the second groove 1045. Both the first retaining rib 1013 and the second retaining rib 1044 are strip-shaped structures, thus forming a fence-like structure. When the triangular gusset plate 101 and the connecting gusset plate 104 are in a horizontal state, the first retaining rib 1013 and the second retaining rib 1044 can prevent the melted snow water or rain water on the surfaces of the triangular gusset plate 101 and the connecting gusset plate 104 from flowing to the connection point and freezing into ice in a low-temperature environment, causing structural damage to the key connection point. When the triangular gusset plate 101 and the connecting gusset plate 104 are in a vertical state, the first retaining rib 1013 and the second retaining rib 1044 have a shielding effect, playing a shielding and protecting role for the connection point to prevent snow from falling on the connection point and freezing into ice.

[0034] In this embodiment, the other long side contour of the connecting link plate 104 is in an arc structure, which is convenient for evenly dispersing the force to both ends of the connecting link plate 104. And arc-shaped protruding points are provided at both ends of the arc-shaped side. Through holes are opened on the protruding points, and the protruding points are connected with the first parallel hanging plate 1004 through the through holes. The connecting link plate 104 is connected to the connecting hole 1011 of the triangular link plate 101 at the tail end of the disc suspension insulator 102 through the first parallel hanging plate 1004. Reinforcing ribs 1041 are provided on both sides of the connecting link plate 104 to enhance the overall strength. A first shielding ring 1047 is installed on the connecting link plate 104 to reduce corona discharge and protect the disc suspension insulator 102.

[0035] Refer to Figure 1 and Figure 3 Refer to

[0036] and Figure 1 In this embodiment, a right-angle hanging plate 1001 is pin-connected to the first protrusion 1012 of the triangular link plate 101 at the head end of the disc suspension insulator 102. The end of the right-angle hanging plate 1001 is connected with a ball head hanging plate 1002 by bolts. The other end of the ball head hanging plate 1002 is connected to one end of the disc suspension insulator 102. A bowl head hanging plate 1003 is assembled at the other end of the disc suspension insulator 102. The disc suspension insulator 102 is connected to the triangular link plate 101 at the tail end of the disc suspension insulator 102 through the bowl head hanging plate 1003. The right-angle hanging plate 1001, the ball head hanging plate 1002, and the bowl head hanging plate 1003 are used as movable connectors to connect the triangular link plate 101 and the connecting link plate 104, and as movable connectors, they can allow a certain range of movement, so as to unload the torsion generated by natural factors when the device is erected in the air. Figure 2 Refer to

[0037] In this embodiment, the tower-end connecting fitting 200 includes a traction plate 205. The traction plate 205 is connected to the connecting hole 1011 on the triangular link plate 101 at the head end of the disc suspension insulator 102. The outer end of the traction plate 205 is connected with a PT adjusting plate 204 by bolts. The outer end of the PT adjusting plate 204 is movably connected with a second parallel hanging plate 203. One end of the second parallel hanging plate 203 is connected with a first DB adjusting plate 202. A pair of interconnected first U-shaped hanging rings 201 are provided at the front end of the first DB adjusting plate 202. In this embodiment, the connection is made through the traction plate 205, the length of the disc suspension insulator 102 is finely adjusted by the PT adjusting plate 204, the length of the assembled part is changed through the second parallel hanging plate 203 for secondary adjustment. The first DB adjusting plate 202 is mainly used to adjust the length of the disc suspension insulator 102 and the wire in the overhead power line and the substation. The first U-shaped hanging ring 201 realizes the suspension connection between the tower-end connecting fitting 200 and the tower.The transmission line end connection fitting 300 includes a strain clamp 301. A first spacer 302 is fixedly connected to the upper end of the strain clamp 301. A second U-shaped hanging ring 303 is provided at one end of the strain clamp 301. A second DB adjusting plate 304 is assembled on the second U-shaped hanging ring 303. One end of the second DB adjusting plate 304 is connected to an extension rod 306. A fastener 305 is provided at the end of the extension rod 306 where it is connected to the second DB adjusting plate 304. A pair of second shielding rings 307 are provided at the tail of the strain clamp 301, and a second spacer 308 is provided on the second shielding ring 307. The strain clamp 301 in this embodiment is used to fix the electric wire. The first spacer 302 and the second spacer 308 have the same function, which is to fix the distance between each split conductor, prevent the conductors from whipping each other, suppress micro-vibration and sub-span oscillation. The second U-shaped hanging ring 303 plays a connecting role. The function of the second DB adjusting plate 304 is similar to that of the first DB adjusting plate 202, mainly used to adjust the length of the transmission line in overhead power lines and substations.

[0038] The above content further elaborates on the present utility model in combination with specific implementation manners. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the protection scope determined by the claims submitted for the present utility model.

Claims

1. A four - unit double - suspension - point strain string of disc - shaped suspension insulators in heavy - ice areas, comprising a strain fitting assembly (100). One end of the strain fitting assembly (100) is equipped with a tower - end connecting fitting (200), and the other end of the strain fitting assembly (100) is equipped with a transmission - line - end connecting fitting (300). It is characterized in that: The strain fitting assembly (100) includes a pair of disc - shaped suspension insulators (102). Triangular gusset plates (101) are assembled at both the head and tail ends of the disc - shaped suspension insulators (102). An adapter gusset plate (104) is connected between the two triangular gusset plates (101) at the tail - end position of the disc - shaped suspension insulators (102). Connecting holes (1011) are opened near the tips of the triangular gusset plates (101). First protrusions (1012) are provided at the other two ends of the triangular gusset plates (101). First grooves (1014) are cut on both the front and rear surfaces of the first protrusions (1012). A plurality of second protrusions (1042) are equidistantly arranged along the edge of the adapter gusset plate (104) in the length - direction thereof. A third protrusion (1043) is further provided on one side of the outermost second protrusion (1042) of the adapter gusset plate (104). Second grooves (1045) are cut on both the front and rear surfaces of the second protrusions (1042). The third protrusion (1043) is located within the second groove. Third grooves (1046) are cut on both the front and rear surfaces of the third protrusion (1043).

2. The four - unit double - suspension - point strain string of disc - shaped suspension insulators for heavy - ice areas according to claim 1, wherein: Connecting holes are opened at the centers of the first protrusions (1012), second protrusions (1042), and third protrusions (1043). First ribs (1013) are provided at the edges of the first grooves (1014). Second ribs (1044) are provided at the edges of the second grooves (1045). Both the first ribs (1013) and the second ribs (1044) are strip - shaped structures.

3. A four - string double - suspension - point tension string of disc suspension insulators for heavy - ice areas according to claim 2, characterized in that: The other long - side contour of the adapter gusset plate (104) is an arc - shaped structure. Arc - shaped protruding points are provided at both ends of the arc - shaped side. Through - holes are opened on the protruding points. Reinforcing ribs (1041) are provided on both sides of the adapter gusset plate (104). A first shielding ring (1047) is installed on the adapter gusset plate (104).

4. A four-link double-hanging-point tension string for a disc suspension insulator in a heavy-ice area according to claim 3, characterized in that: The protruding points are connected to a first parallel hanger (1004) through the through - holes. The adapter gusset plate (104) is connected to the connecting hole (1011) of the triangular gusset plate (101) at the tail - end position of the disc - shaped suspension insulator (102) through the first parallel hanger (1004).

5. The four - unit double - suspension - point strain string of disc suspension insulators for heavy - icing areas according to claim 2, characterized in that: A right - angle hanger (1001) is pinned to the first protrusion (1012) of the triangular gusset plate (101) at the head - end position of the disc - shaped suspension insulator (102). The end of the right - angle hanger (1001) is connected to a ball - head hanger (1002) by bolts. The other end of the ball - head hanger (1002) is connected to one end of the disc - shaped suspension insulator (102). A socket - head hanger (1003) is assembled at the other end of the disc - shaped suspension insulator (102). The disc - shaped suspension insulator (102) is connected to the triangular gusset plate (101) at the tail - end position of the disc - shaped suspension insulator (102) through the socket - head hanger (1003).

6. A four-link double-hanging-point tension string of a disc suspension insulator in a heavy ice area according to claim 1, characterized in that: An equalizing ring (103) for preventing corona discharge is installed on the triangular link plate (101) at the tail end of the disc suspension insulator (102).

7. A four-link double-hanging-point tension string of a disc suspension insulator in a heavy ice area according to claim 1, characterized in that: The tower-end connecting fitting (200) includes a traction plate (205), the traction plate (205) is connected to a connecting hole (1011) on the triangular link plate (101) at the head end of the disc suspension insulator (102), the outer end of the traction plate (205) is connected with a PT adjusting plate (204) by bolts, the outer end of the PT adjusting plate (204) is movably connected with a second parallel hanging plate (203), one end of the second parallel hanging plate (203) is connected with a first DB adjusting plate (202), and a pair of interconnected first U-shaped hanging rings (201) are arranged at the front end of the first DB adjusting plate (202).

8. A four - link double - suspension - point strain string of disc - shaped suspension insulators for heavy - ice areas according to claim 1, characterized in that: The transmission-line-end connecting fitting (300) includes a strain clamp (301), a first spacer bar (302) is fixedly connected to the upper end of the strain clamp (301), a second U-shaped hanging ring (303) is arranged at one end of the strain clamp (301), a second DB adjusting plate (304) is assembled on the second U-shaped hanging ring (303), one end of the second DB adjusting plate (304) is connected with an extension rod (306), a fastener (305) is arranged at the end of the extension rod (306) connected with the second DB adjusting plate (304), a pair of second shielding rings (307) are arranged at the tail of the strain clamp (301), and a second spacer bar (308) is arranged on the second shielding ring (307).

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