Insulator string device, elastic member, and method for manufacturing insulator string device

Abstract

To suppress a wind sound from occurring.SOLUTION: An insulator connection device includes: a plurality of insulators; a shaft member provided at the lower center of each of the plurality of insulators; a socket member fitted into the upper center of each of the plurality of insulators and into which the shaft members of adjacent insulators are fitted; and an elastic member that is attached to surround an outer periphery of the shaft member and includes an elastic body, each of the plurality of insulators has a plurality of pleat parts provided concentric circularly vertically below, and the elastic member has a cylindrical part configured to surround the outer periphery of the shaft member; and a collar part that extends in a radial direction from the cylindrical part and clogs at least a portion of a space between one of the plurality of pleat parts and the shaft member.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to an insulator string device, an elastic member, and a method for manufacturing an insulator string device. [Background technology]

[0002] In order to connect and fix an overhead transmission line to a steel tower, an insulator stringing device, which connects multiple insulators, is used. The multiple insulators that make up the insulator stringing device are connected to each other, for example, by fitting a shaft member provided at the bottom of a first insulator into a socket member provided at the top of a second insulator (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 1-19724 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present disclosure is to suppress the generation of wind noise from an insulator string device. [Means for solving the problem]

[0005] According to one aspect of the present disclosure, A plurality of insulators; a shaft member provided at a central lower portion of each of the plurality of insulators; a socket member fitted to the central upper portion of each of the plurality of insulators, with the shaft members of adjacent insulators fitted thereto; an elastic member that is attached to surround the outer periphery of the shaft member and includes an elastic body; Equipped with Each of the plurality of insulators has a plurality of corrugations arranged concentrically vertically, The elastic member is a cylindrical portion configured to surround the outer periphery of the shaft member; a flange portion extending radially from the cylindrical portion and closing at least a portion of a space between one of the plurality of pleats and the shaft member; have An insulator string device is provided. [Effects of the Invention]

[0006] According to the present disclosure, it is possible to suppress the generation of wind noise from the insulator string device. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic front view showing a portion of an insulator string device according to an embodiment of the present disclosure. [Figure 2A] FIG. 2A is a schematic front view of an elastic member according to one embodiment of the present disclosure. [Figure 2B] FIG. 2B is a schematic side view of an elastic member according to one embodiment of the present disclosure. [Figure 2C] FIG. 2C is a schematic top view of an elastic member according to one embodiment of the present disclosure. [Figure 3] FIG. 3 is a schematic diagram illustrating a state in which wind is blowing against a part of the insulator string device according to one embodiment of the present disclosure. [Figure 4] FIG. 4 is a schematic top view of an elastic member according to a second modification of an embodiment of the present disclosure. [Figure 5] FIG. 5 is a graph showing noise levels relative to wind speed. [Figure 6] FIG. 6 is a schematic diagram showing a state in which wind is blowing against a part of the insulator string device according to the comparative example. DETAILED DESCRIPTION OF THE INVENTION

[0008] <Knowledge gained by the inventors> First, the findings of the inventors will be explained.

[0009] When wind blows against the insulator linkage, the vibrations generated by the wind hitting each insulator are coupled throughout the entire insulator linkage through the shaft member and socket member, which can cause loud wind noise from the insulator linkage.

[0010] Conventionally, in order to suppress the generation of the above-mentioned wind noise, a technique has been adopted in which an elastic member is attached to the shaft member of the insulator string device (for example, Patent Document 1 mentioned above).

[0011] However, in addition to the wind noise caused by the coupling of vibrations via the shaft member and the like, wind noise may also be generated due to the wind current itself blowing against the insulator connecting device.

[0012] Specifically, as shown in Fig. 6, when wind blows against the insulator connection device 90 of the comparative example, the wind (indicated by the thick arrow in Fig. 6) flows into the insulator 910. Within the multiple pleats 914 of the insulator 910 into which the wind has flowed, the wind flow separates from each pleat 914, generating vortices of various sizes. When the frequency of the vortex matches the acoustic natural frequency of the insulator 910, the insulator connection device 90 enters a resonant state. As a result, there is a possibility that loud wind noise will be generated.

[0013] In particular, insulators used in high-altitude mountainous regions must ensure good insulation performance even in humid conditions. For this reason, insulators with deeper pleats and larger outer diameters (hereinafter referred to as large insulators) are used to ensure an effective creepage distance on the insulator surface in humid environments. Such large insulators tend to easily generate the vortex mentioned above, which makes them more susceptible to generating loud wind noise.

[0014] Therefore, the inventors have conducted extensive research into the above-mentioned new problem and have found a configuration that can suppress the generation of vortices within the insulator by improving the elastic member.

[0015] The present disclosure described below is based on the above findings made by the inventors.

[0016] <Embodiments of the present disclosure> Next, embodiments of the present disclosure will be listed and described.

[0017] [1] An insulator string device according to one aspect of the present disclosure includes: A plurality of insulators; a shaft member provided at a central lower portion of each of the plurality of insulators; a socket member fitted to the central upper portion of each of the plurality of insulators, with the shaft members of adjacent insulators fitted thereto; an elastic member that is attached to surround the outer periphery of the shaft member and includes an elastic body; Equipped with Each of the plurality of insulators has a plurality of corrugations arranged concentrically vertically, The elastic member is a cylindrical portion configured to surround the outer periphery of the shaft member; a flange portion extending radially from the cylindrical portion and closing at least a portion of a space between one of the plurality of pleats and the shaft member; It has. This configuration makes it possible to suppress the generation of wind noise from the insulator string device.

[0018] [2] In the insulator string device described in [1] above, The corrugated portion closest to the outer peripheral edge of the flange and the flange are spaced apart from each other with a predetermined gap therebetween. According to this configuration, it is possible to suppress a reduction in the substantial creepage distance from the shaft member through the insulator to the socket member.

[0019] [3] In the insulator string device described in [1] or [2] above, The gap between the flange and the corrugated portion closest to the outer peripheral edge of the flange is 1 mm or more and 10 mm or less. This configuration makes it possible to stably prevent contact between the folds and the flange, and also to prevent excessive inflow of air through the gap.

[0020] [4] In the insulator string device according to any one of [1] to [3] above, The flange portion is molded integrally with the cylindrical portion. According to this configuration, the elastic member can be attached to the shaft member, and at the same time, the flange portion can be arranged so as to close the space within the predetermined pleat portion.

[0021] [5] In the insulator string device according to any one of [1] to [3] above, The flange portion is configured as a separate body from the cylindrical portion. According to this configuration, the flange portion and the cylindrical portion can be molded using separate dies, and the respective dies can be easily produced.

[0022] [6] In the insulator string device according to any one of [1] to [5] above, the flange portion has an opening that penetrates from an outer peripheral end of the flange portion to an opening in the cylindrical portion, The elastic member further includes a cover portion that closes the opening of the flange portion. This configuration can suppress excessive inflow of wind through the opening in the flange portion.

[0023] [7] An elastic member according to yet another aspect of the present disclosure includes: It is used in the insulator string device according to any one of [1] to [6] above. This configuration makes it possible to suppress the generation of wind noise from the insulator string device.

[0024] [8] A method for manufacturing an insulator string device according to yet another aspect of the present disclosure includes: a step of preparing a plurality of insulators, a shaft member provided at a central lower portion of each of the plurality of insulators, and a socket member fitted to a central upper portion of each of the plurality of insulators, with the shaft members of adjacent insulators fitted thereto; a step of attaching an elastic member including an elastic body so as to surround an outer periphery of the shaft member; Equipped with In the preparing step, As each of the plurality of insulators, a member having a plurality of folds arranged concentrically on a vertically lower side is prepared; In the step of attaching the elastic member, The elastic member is a member having a cylindrical portion configured to surround the outer periphery of the shaft member, and a flange portion extending radially from the cylindrical portion and blocking at least a portion of the space between one of the plurality of pleat portions and the shaft member. This configuration makes it possible to suppress the generation of wind noise from the insulator string device.

[0025] <One embodiment of the present disclosure> (1) Insulator string device (insulator string structure) An insulator connection device 10 according to an embodiment of the present disclosure will be described with reference to Fig. 1 to Fig. 3. Note that Fig. 1 and Fig. 3 show cross-sectional views of a portion of an insulator 100. Fig. 1 and Fig. 3 also show a portion of the insulator connection device 10.

[0026] As shown in FIG. 1, the insulator connecting device 10 of this embodiment is configured to connect and fix an overhead transmission line (not shown) to a steel tower (not shown), and includes, for example, an insulator 100, an axial member (pin member) 200, a socket member (bearing member) 300, and an elastic member (cap member) 400.

[0027] [insulator] As shown in Fig. 1, the insulator 100 is configured as, for example, a so-called DC fog-resistant suspension insulator. The insulator 100 has a shade-shaped (dish-shaped, umbrella-shaped) shade portion 120. The insulator 100 is arranged so as to expand from the vertically upper side of the shade portion 120 to the vertically lower side. The shade portion 120 contains porcelain.

[0028] The central portion of the shed portion 120 protrudes vertically upward. A shed inner recess 122 that is recessed vertically upward is provided in the central lower portion of the shed portion 120.

[0029] The shed portion 120 has a plurality of corrugations 140 arranged vertically and concentrically, thereby ensuring an effective creepage distance on the surface of the insulator 100. In a DC fog-resistant suspension insulator such as this embodiment, the depth of the corrugations 140 of the shed portion 120 is greater than the depth of the corrugations of a standard insulator.

[0030] When the insulator 100 is configured as a DC fog-resistant suspension insulator, the diameter of the shed portion 120 of the insulator 100 is, for example, 320 mm, and the maximum depth of the pleat portion 140 is, for example, 65 mm.

[0031] A plurality of insulators 100 are provided in the insulator connecting device 10. The plurality of insulators 100 are arranged, for example, at equal intervals in the vertical direction, and are connected to one another by fitting the shaft members 200 into the socket members 300. The plurality of insulators 100 may be not only of a suspension type arranged in the vertical direction, but also of a tension type arranged in a direction having a horizontal component.

[0032] [Shaft member] The shaft member 200 is provided at the central lower portion of each of the plurality of insulators 100 and extends vertically downward from the shed portion 120 .

[0033] A portion of the shaft member 200 including its upper end is inserted into the inner shed recess 122 in the center of the shed portion 120 and fixed therein with, for example, cement. This structure ensures that the insulator 100 has a specified tension and insulating performance.

[0034] On the other hand, the shaft member 200 has, for example, a fitting ball portion (not shown) at the lower end thereof. The fitting ball portion has a larger diameter than the central portion of the shaft member 200 in the axial direction, and is provided in a spherical shape.

[0035] [Socket parts] The socket member 300 is fitted onto the central upper portion of each of the multiple insulators 100. The socket member 300 is configured, for example, in a hat shape, and expands vertically from top to bottom. The socket member 300 is fixed to the shed portion 120 by, for example, cement. This structure ensures that the insulators 100 have the specified tension and insulating performance.

[0036] The socket member 300 has a fitting hole 320 into which the fitting ball portion of the shaft member 200 provided on the adjacent insulator 100 is fitted. Specifically, the fitting hole 320 is opened downward from the upper end at the center of the socket member 300, and opens from a predetermined position at the center of the socket member 300 toward the side of the socket member 300 in a shape that imitates the fitting ball portion of the shaft member 200.

[0037] When the fitting ball portion of the shaft member 200 is inserted into the fitting hole portion 320, the fitting ball portion is locked at the upper center end of the fitting hole portion 320. The upper center end of the fitting hole portion 320 also forms a spherical seat. This allows the fitting ball portion fitted into the fitting hole portion 320 to move flexibly.

[0038] The socket member 300 also has a pin insertion hole (not shown) that penetrates the fitting hole portion 320. By inserting a split pin (not shown) into the pin insertion hole, the fitting ball portion of the shaft member 200 can be fixed to the socket member 300.

[0039] [Elastic member (cap)] 1, the elastic member 400 is attached so as to surround the outer periphery of the shaft member 200. The elastic member 400 of this embodiment is configured to, for example, absorb vibrations generated in the insulator 100 and suppress the generation of vortices within the insulator 100.

[0040] The elastic member 400 includes an elastic body. Specifically, the elastic member 400 includes, for example, silicone rubber. This makes it possible to obtain a vibration absorbing effect that absorbs vibrations generated in the insulator 100.

[0041] The elastic member 400 has, for example, semiconductivity, which allows the elastic member 400 to have the same potential as the shaft member 200 when a high voltage is applied to the overhead transmission line, thereby making it possible to suppress the occurrence of abnormal discharge.

[0042] The type A durometer hardness of the elastic member 400 is not particularly limited, but may be, for example, 45 or more and 65 or less. By making the hardness of the elastic member 400 45 or more, a sufficient vibration suppression effect can be obtained. On the other hand, by making the hardness of the elastic member 400 65 or less, the elastic member 400 can be easily attached to the shaft member 200.

[0043] As shown in FIGS. 1 and 2A to 2C, in this embodiment, the elastic member 400 has, for example, a tubular portion 410, a flange portion 480, and a protruding piece portion 440.

[0044] (Cylindrical part) The tubular portion 410 is configured in a substantially cylindrical shape, and is configured to surround the outer periphery of the shaft member 200 when the elastic member 400 is attached to the shaft member 200. The inner diameter of the tubular portion 410 is approximately equal to or slightly smaller than the outer diameter of the shaft member 200. This allows the tubular portion 410 to elastically come into close contact with the outer periphery of the shaft member 200 when attached to the shaft member 200.

[0045] The cylindrical portion 410 is configured to be approximately C-shaped when viewed from the axial direction of the cylindrical portion 410, and opens so as to widen radially outward. The opening angle of the cylindrical portion 410 is set so that the cylindrical portion 410 can be opened and the shaft member 200 can be inserted into the hollow portion of the cylindrical portion 410.

[0046] The outer peripheral surface of the cylindrical portion 410 is formed, for example, in a bellows shape. This allows the cylindrical portion 410 of the elastic member 400 to be easily opened when the elastic member 400 is attached to the shaft member 200.

[0047] (Brim (collar)) In this embodiment, the flange portion 480 is configured, for example, in a doughnut plate shape and extends radially from the cylindrical portion 410. The flange portion 480 is configured, for example, to block at least a portion of the space between one of the plurality of corrugations 140 and the shaft member 200. This makes it possible to suppress the generation of vortices in the space between the corrugation 140 and the shaft member 200.

[0048] In this embodiment, the flange portion 480 is configured to block at least a portion of the space between the shaft member 200 and the second pleat portion 140 counting outward from the pleat portion 140 closest to the shaft member 200, for example.

[0049] Here, the first pleat 140 closest to the shaft member 200 is the smallest. On the other hand, the second pleat 140 counting outward from the first pleat 140 closest to the shaft member 200 is larger than the first pleat 140. Therefore, vortices are more likely to occur near the second pleat 140 than near the first pleat 140.

[0050] Therefore, in this embodiment, by blocking the space inside the relatively large second fold portion 140 with the flange portion 480 as described above, it is possible to stably suppress the generation of vortices inside the second fold portion 140.

[0051] In this embodiment, the flange 480 closes the space near a predetermined pleat 140, while the pleat 140 closest to the outer circumferential edge of the flange 480 and the flange 480 are separated from each other by a predetermined gap S. Note that the "outer circumferential edge of the flange 480" here refers to the outer circumferential edge of the arc portion of the flange 480 excluding the opening 480a when viewed from the axial direction of the tubular portion 410 described below.

[0052] That is, in this embodiment, the space inside the fold 140 closest to the outer peripheral end of the flange 480 is not completely blocked by the flange 480, but a predetermined gap S is provided between the fold 140 and the flange 480. This makes it possible to maintain the unevenness of the insulator 100 in an area closer to the shaft member 200 than the fold 140 closest to the outer peripheral end of the flange 480. As a result, it is possible to ensure a creepage distance (insulation distance) that follows the unevenness of the multiple folds 140 over the entire insulator 100.

[0053] In this embodiment, the gap S between the flange 480 and the fold 140 closest to the outer peripheral edge of the flange 480 may be, for example, 1 mm or more and 10 mm or less, or 2 mm or more and 5 mm or less. By setting the gap S to 1 mm or more, or 2 mm or more, it is possible to stably prevent contact between the fold 140 and the flange 480. On the other hand, by setting the gap S to 10 mm or less, or 5 mm or less, it is possible to prevent excessive inflow of air through the gap S.

[0054] In order to satisfy the above requirements for collar portion 480, the diameter of collar portion 480 in plan view may be, for example, 130 mm or more and 150 mm or less, or may be approximately 145 mm.

[0055] In the present embodiment, the flange portion 480 is configured, for example, in a substantially C-shape similar to the cylindrical portion 410 when viewed in the axial direction of the cylindrical portion 410. The flange portion 480 has, for example, an opening 480a that penetrates from the outer peripheral end of the flange portion 480 to an opening within the cylindrical portion 410. The opening 480a of the flange portion 480 opens so as to widen radially outward along the opening of the cylindrical portion 410. This allows the shaft member 200 to be inserted into the hollow portion of the cylindrical portion 410 by opening the opening 480a of the elastic member 400, even when the elastic member 400 has the flange portion 480.

[0056] In this embodiment, the thickness of the collar portion 480 may be, for example, 1 mm or more and 5 mm or less, or 1.5 mm or more and 3 mm or less. By making the thickness of the collar portion 480 1 mm or more, or 1.5 mm or more, the rigidity of the collar portion 480 can be maintained even if the thickness of the collar portion 480 decreases due to aging. On the other hand, by making the thickness of the collar portion 480 5 mm or less, or 3 mm or less, the elastic member 400 can be prevented from becoming excessively hard. This makes it easy to attach the elastic member 400.

[0057] In this embodiment, the flange portion 480 is, for example, molded integrally with the cylindrical portion 410. This allows the flange portion 480 to be positioned so as to close the space within a predetermined flange portion 480 at the same time as the elastic member 400 is attached to the shaft member 200.

[0058] (projection part) The protruding piece 440 is provided on the lower side of the cylindrical portion 410, and has a shape that follows the opening shape of the fitting hole 320 of the socket member 300. This allows the protruding piece 440 to cover the side opening of the fitting hole 320 of the socket member 300 when the elastic member 400 is attached to the shaft member 200.

[0059] A thin plate-like skirt (fin portion) 450 may be provided at the tip of the protruding piece portion 440. When the elastic member 400 is viewed from the front, the skirt 450 is provided so as to follow the elliptical shape of the tip of the protruding piece portion 440. This allows the skirt 450 to be deformed and close the gap between the fitting hole portion 320 and the tip of the protruding piece portion 440.

[0060] The protruding piece 440 may be provided with drainage holes 448 that allow water to pass through. This makes it possible to prevent rainwater that has entered through the pin insertion hole 340 of the socket member 300 or the shaft member 200 from accumulating in the cavity within the fitting hole 320 of the socket member 300.

[0061] (2) Manufacturing method of insulator string device Next, a method for manufacturing the insulator connection device 10 of this embodiment will be described with reference to Fig. 1. The method for manufacturing the insulator connection device 10 can also be considered as a method for suppressing wind noise in the insulator connection device 10 or a method for attaching the elastic member 400.

[0062] (Step 1: Insulator string preparation process (insulator string connection process)) First, the insulator 100, the shaft member 200, and the socket member 300 are provided in a connected state by, for example, an insulator manufacturer.

[0063] 1, the multiple insulators 100 are connected to each other by fitting the mating ball portion of the shaft member 200 provided at the lower center of the first insulator 100 into the mating hole portion 320 of the socket member 300 provided at the top of the second insulator 100. At this time, a split pin 600 is inserted into the pin insertion hole 340 of the socket member 300 to fix the mating ball portion of the shaft member 200 in the socket member 300 so that it does not come off.

[0064] Next, the upper ends of the connected insulators 100 are connected to a steel tower (not shown) by metal fittings for connecting insulators, and the lower ends of the insulators 100 are connected to metal fittings that connect overhead power lines (not shown).

[0065] (Step 2: Elastic member attachment process) After the insulator string preparation step is completed, as shown in FIG. 1, the elastic member 400 is attached to the shaft member 200 so as to surround the outer periphery of the shaft member 200.

[0066] In this embodiment, a member having a cylindrical portion 410, a flange portion 480, and a protruding piece portion 440 is attached to the shaft member 200 as the elastic member 400.

[0067] Specifically, the opening of the cylindrical portion 410 in the elastic member 400 and the opening 480a of the flange portion 480 are opened, the cylindrical portion 410 is placed over the shaft member 200, and the cylindrical portion 410 is fitted onto the shaft member 200 so as to surround the outer periphery of the shaft member 200.

[0068] At this time, the flange 480 extending radially from the cylindrical portion 410 closes at least a part of the space between one of the plurality of pleats 140 and the shaft member 200. When arranging the flange 480, a gap S is formed between the flange 480 and the pleat 140 closest to the outer peripheral end of the flange 480.

[0069] At this time, the protruding piece 440 of the elastic member 400 is fitted into the fitting hole 320 so as to conform to the opening shape of the fitting hole 320 of the socket member 300. As a result, the protruding piece 440 of the elastic member 400 covers the side opening of the fitting hole 320 of the socket member 300.

[0070] In this manner, the elastic members 400 are attached to the shaft members 200 that connect a pair of the insulators 100 among the plurality of insulators 100 .

[0071] In this manner, the insulator string device 10 of this embodiment is manufactured.

[0072] (3) Summary of this embodiment According to this embodiment, one or more of the following effects are achieved.

[0073] (a) In this embodiment, the flange portion 480 extending radially from the tubular portion 410 of the elastic member 400 blocks at least a portion of the space between one of the multiple pleat portions 140 and the shaft member 200.

[0074] 3, this configuration can suppress the inflow of wind (indicated by the thick arrow in FIG. 3) into the space inside the corrugated portion 140 that is closest to the outer peripheral edge of the flange portion 480, thereby suppressing the generation of vortices in the space inside the corrugated portion 140. As a result, even if vortices are generated in other parts of the insulator 100, the generation of excessively large or complex vortices can be suppressed.

[0075] As a result, in this embodiment, it is possible to suppress the generation of large wind noise caused by vortices inside the insulator 100.

[0076] (b) In this embodiment, a predetermined gap S is provided between the fold 140 closest to the outer peripheral edge of the flange 480 and the flange 140 .

[0077] Consider the case where the outer peripheral end of the flange 480 contacts the fold 140. In this case, the flange 480 completely blocks the space inside the contacting fold 140. Therefore, the flange 480 smooths out the irregularities of the insulator 100 in a region closer to the shaft member 200 than the contacting fold 140. Furthermore, because the elastic member 400 is semiconductive, the portion from the contact position of the semiconductive flange 480 with the fold 140 to the shaft member 200 is at the same potential as the shaft member 200. Therefore, the effective creepage distance from the shaft member 200 through the insulator 100 to the socket member 300 is shortened. As a result, the insulation properties of the insulator connecting device 10 as a whole may be reduced.

[0078] In contrast, in this embodiment, the corrugated portion 140 and the flange portion 140 are separated from each other by a predetermined gap S, thereby maintaining the unevenness of the insulator 100 in a region closer to the shaft member 200 than the corrugated portion 140 closest to the outer circumferential end of the flange portion 480. Furthermore, by preventing the semiconductive flange portion 480 from contacting the corrugated portion 140, the insulating properties of the insulator 100 can be maintained in a region closer to the shaft member 200 than the outer circumferential end of the flange portion 480. This makes it possible to prevent a reduction in the substantial creepage distance from the shaft member 200 through the insulator 100 to the socket member 300. As a result, it is possible to prevent a decrease in the insulating properties of the insulator connecting device 10 as a whole.

[0079] (c) In this embodiment, the flange portion 480 is molded integrally with the tubular portion 410. This allows the flange portion 480 to be positioned so as to close the space within a predetermined pleat portion 140 at the same time as the elastic member 400 is attached to the shaft member 200.

[0080] Furthermore, even if wind flows into the insulator 100, it is possible to prevent the flange 480 from coming off the tubular portion 410, and to prevent only the flange 480 from falling. This makes it possible to stably maintain the state in which the flange 480 closes the space within the pleated portion 140.

[0081] (4) Modification of this embodiment The above-described embodiment can be modified as necessary as in the following variations. Only elements different from the above-described embodiment will be described below, and elements that are substantially the same as those described in the above-described embodiment will be assigned the same reference numerals and their description will be omitted.

[0082] [Variation 1] In the above embodiment, the flange portion 480 of the elastic member 400 is molded integrally with the cylindrical portion 410, but the configuration of the flange portion 480 may be changed as in the following first modification.

[0083] In the first modification, the flange portion 480 of the elastic member 400 is configured as a separate body from, for example, the cylindrical portion 410. The flange portion 480 is configured to be fitted into a groove portion (not shown) provided on the outer periphery of the cylindrical portion 410 along a direction perpendicular to the central axis of the cylindrical portion 410.

[0084] In the elastic member attachment step of Modification 1, for example, the opening of tubular portion 410 is opened in a state in which flange portion 480 is previously fitted into a groove portion provided on the outer periphery of tubular portion 410, and tubular portion 410 is attached to shaft member 200. Alternatively, after tubular portion 410 is attached to shaft member 200, flange portion 480 may be fitted into the groove portion provided on the outer periphery of tubular portion 410.

[0085] (Summary of Variation 1) According to the first modification, the flange portion 480 of the elastic member 400 is configured as a separate body from the cylindrical portion 410, and therefore the elastic member 400 can be easily molded.

[0086] In the above embodiment, since the flange portion 480 is molded integrally with the cylindrical portion 410, the shape of the elastic member 400 is complex, which may make it difficult to manufacture a mold.

[0087] In the above-described embodiment, in particular, because flange 480 is thin and wide, sufficient resin may not be distributed throughout the entire molding portion of flange 480 within the mold, which may reduce the moldability of flange 480.

[0088] In the above-described embodiment, the flange portion 480 is integrally provided on the outer periphery of the cylindrical portion 410, which may increase the rigidity of the elastic member 400. In this case, it becomes difficult to open the opening of the cylindrical portion 410 and attach the cylindrical portion 410 to the shaft member 200 in the elastic member attachment step.

[0089] In contrast to this, in the present modified example 1, the flange portion 480 of the elastic member 400 is configured as a separate body from the cylindrical portion 410, and therefore the flange portion 480 and the cylindrical portion 410 can be molded using separate molds, which makes it easy to manufacture the respective molds.

[0090] In this first modification, by preparing separate molds as described above, the mold for flange portion 480 can have a simple shape. This allows sufficient resin to be distributed throughout the entire interior of the mold for flange portion 480. As a result, a decrease in moldability of flange portion 480 can be suppressed.

[0091] In the present first modification, the flange portion 480 is configured as a separate body from the cylindrical portion 410, and therefore, the opening of the cylindrical portion 410 can be opened without the flange portion 480, and the cylindrical portion 410 can be easily attached to the shaft member 200. Thereafter, the flange portion 480 can be attached to the outer periphery of the cylindrical portion 410. In this way, the elastic member 400 can be easily attached to the shaft member 200.

[0092] [Variation 2] In the above embodiment, the case where the opening 480a of the flange portion 480 of the elastic member 400 is left open has been described, but the configuration of the elastic member 400 may be changed as in the following Modification 2.

[0093] As shown in FIG. 4, in the second modification, the elastic member 400 further includes a cover portion 490 that closes the opening 480a of the flange portion 480, for example.

[0094] Cover portion 490 is configured, for example, as a separate body from flange portion 480, so as to be detachable from flange portion 480. Specifically, cover portion 490 has, for example, hooks 492. Hooks 492 allow cover portion 490, which is a separate body, to be hooked onto flange portion 480.

[0095] The cover portion 490 may be attached vertically above the flange portion 480 or vertically below the flange portion 480.

[0096] In the elastic member attachment step of Modification 2, for example, the opening of tubular portion 410 and opening 480a of flange portion 480 in elastic member 400 are opened, and tubular portion 410 is attached to shaft member 200. Next, opening 480a of flange portion 480 is closed with cover portion 490. At this time, cover portion 490, which is a separate member, is hooked onto flange portion 480 by hook 492.

[0097] (Summary of Variation 2) According to the second modification, the elastic member 400 further includes a cover portion 490 that closes the opening 480a of the flange portion 480, so that excessive inflow of wind through the opening 480a of the flange portion 480 can be suppressed.

[0098] <Other Embodiments of the Present Disclosure> Although the embodiments of the present disclosure have been specifically described above, the present disclosure is not limited to the above-described embodiments and can be modified in various ways without departing from the spirit of the present disclosure.

[0099] In the above embodiment, the insulator 100 is a DC fog-resistant suspension insulator, but the insulator 100 may also be a large AC insulator. Even with large AC insulators, wind noise tends to be generated easily from the insulator string device when the wind speed is high. Therefore, the insulator string device 10 of the above embodiment is also effective when the insulator 100 is a large AC insulator.

[0100] In the above-described embodiment, the flange portion 480 has an opening that widens radially outward along the opening of the cylindrical portion 410 when viewed in the axial direction of the cylindrical portion 410. However, the present disclosure is not limited to this case. The flange portion 480 may have, for example, a slit-shaped opening that extends radially along the cylindrical portion 410 when viewed in the axial direction of the cylindrical portion 410. This reduces the opening area of ​​the flange portion 480. As a result, the space between the shaft member 200 and the pleated portion 140 closest to the outer circumferential end of the flange portion 480 can be sealed more stably than in the above-described embodiment.

[0101] In the above-described embodiment, a case has been described in which the collar portion 480 is configured to close at least a portion of the space between the shaft member 200 and the second pleated portion 140, counting outward from the pleated portion 140 closest to the shaft member 200, but the present disclosure is not limited to this case. The collar portion 480 may be configured to close at least a portion of the space between the shaft member 200 and a pleated portion 140 other than the second pleated portion 140. Alternatively, the collar portion 480 may be configured to close at least a portion of the space between the outermost pleated portion 140 and the shaft member 200. [Example]

[0102] Next, examples according to the present disclosure will be described. These examples are examples of the present disclosure, and the present disclosure is not limited to these examples.

[0103] (1) Manufacturing of insulator string device samples The following two insulator string samples were manufactured. The same insulators were used in each insulator string sample. The insulators used were DC fog-resistant suspension insulators with an applied voltage breakdown load (tensile strength) of 210 kN. There were 12 insulators, and the tension of the insulator string was 30 kN.

[0104] (Sample A) Elastic member: As in the embodiment described above (FIG. 1) Outer diameter of cylindrical part: 39 mm Radial thickness of the cylindrical part: 10 mm Flange diameter: 145mm (The space from the shaft member to the second pleat of the insulator was sealed.) Collar thickness: 2mm Gap between the fluted part closest to the outer edge of the flange and the flange: 2 mm Type A durometer hardness: 55 The flange portion was molded integrally with the cylindrical portion.

[0105] (Sample B) Elastic member: Conventional (Figure 6) It was the same as sample A except that it did not have a flange.

[0106] (2) Evaluation Using a specified wind tunnel device, wind noise was evaluated for each of Samples A and B under the following conditions. (conditions) Air outlet shape: width 0.6m x height 2m Blowing method: The wind speed was gradually increased from 0 to 40 m / s, and the time between was kept constant at 120 seconds. Acquired data: Sampling every 0.1 seconds x 120 seconds = 1200 points measured Inclination angle of insulator string device relative to wind direction: 105° It has been confirmed that the noise level of sample B is at its maximum when the inclination angle is 105°.

[0107] (3) Results The wind noise measurement results for samples A and B will be described with reference to FIG.

[0108] (Sample B) As shown by the dotted lines in Figure 5, sample B, which uses a conventional elastic member without a flange, had noise level peaks at wind speeds of around 10 m / s, 15 m / s, and 26 to 37 m / s. With sample B, the peak noise levels at each wind speed were large, and the difference from the background level was over 20 dB.

[0109] In sample B, various vortices were generated at multiple pleats in the insulator, which is thought to have caused the insulator string device to enter a resonant state, resulting in loud wind noise.

[0110] (Sample A) In contrast, as shown by the thick solid line in Figure 5, Sample A, which used an elastic member with a flange, had smaller prominent peak noise levels at wind speeds of around 10 m / s, 15 m / s, and 27 to 36 m / s than Sample B. Furthermore, Sample A had narrower peak noise widths (peak wind speed ranges) than Sample B at wind speeds of around 15 m / s and 27 to 36 m / s.

[0111] The peak area SA1 at a wind speed of about 15 m / s for sample A was reduced by 87% compared to the peak area SB1 at a wind speed of about 15 m / s for sample B. The difference calculated by SB1-SA1 was 16.7 dB.

[0112] The peak area SA2 at wind speeds of around 27 to 36 m / s for sample A was 76% smaller than the peak area SB2 at wind speeds of 27 to 36 m / s for sample B. The difference calculated by SB2-SA2 was 13.7 dB.

[0113] It should be noted that the "area of ​​a peak" in a graph of noise level versus wind speed is the integral of the amount of noise above the background level over a predetermined range of wind speeds that includes the peak.

[0114] In sample A, the elastic member has a flange, which makes it possible to suppress the inflow of wind into the space inside the pleats closest to the outer edge of the flange, and to suppress the generation of vortices in the space inside the pleats. As a result, it was confirmed that sample A was able to achieve a wind noise reduction effect of 10 dB or more.

[0115] <Additional Notes> The following additionally describes aspects of the present disclosure.

[0116] (Appendix 1) A plurality of insulators; a shaft member provided at a central lower portion of each of the plurality of insulators; a socket member fitted to the central upper portion of each of the plurality of insulators, with the shaft members of adjacent insulators fitted thereto; an elastic member that is attached to surround the outer periphery of the shaft member and includes an elastic body; Equipped with Each of the plurality of insulators has a plurality of corrugations arranged concentrically vertically, The elastic member is a cylindrical portion configured to surround the outer periphery of the shaft member; a flange portion extending radially from the cylindrical portion and closing at least a portion of a space between one of the plurality of pleats and the shaft member; have Insulator string device.

[0117] (Appendix 2) The fold closest to the outer peripheral edge of the flange and the flange are spaced apart from each other with a predetermined gap therebetween. 10. The insulator string device of claim 1.

[0118] (Appendix 3) The gap between the flange and the fold closest to the outer circumferential edge of the flange is 1 mm or more and 10 mm or less. 10. The insulator string device according to claim 1 or 2.

[0119] (Appendix 4) The flange portion is configured to close at least a part of the space between the shaft member and the second pleated portion counting outward from the pleated portion closest to the shaft member. 4. The insulator string device according to claim 1.

[0120] (Appendix 5) The thickness of the flange is 1 mm or more and 5 mm or less. 5. The insulator string device according to claim 1.

[0121] (Appendix 6) The flange portion is molded integrally with the cylindrical portion. 6. The insulator string device according to any one of appendices 1 to 5.

[0122] (Appendix 7) The flange portion is configured as a separate body from the cylindrical portion. 6. The insulator string device according to any one of appendices 1 to 5.

[0123] (Appendix 8) the flange portion has an opening that penetrates from an outer peripheral end of the flange portion to an opening in the cylindrical portion, The elastic member further includes a cover portion that closes the opening of the flange portion. 8. The insulator string device according to any one of claims 1 to 7.

[0124] (Appendix 9) Used in an insulator string device according to any one of appendices to appendices 8 Elastic member.

[0125] (Appendix 10) a plurality of insulators, an axial member provided at the lower center of each of the plurality of insulators, and a socket member fitted to the upper center of each of the plurality of insulators, with the axial members of the adjacent insulators fitted together, wherein each of the plurality of insulators is used in an insulator string device having a plurality of pleats arranged concentrically vertically downward, and an elastic member attached so as to surround the outer periphery of the axial member and including an elastic body, a cylindrical portion configured to surround the outer periphery of the shaft member; a flange portion extending radially from the cylindrical portion and closing at least a portion of a space between one of the plurality of pleats and the shaft member; have Elastic member.

[0126] (Appendix 11) a step of preparing a plurality of insulators, a shaft member provided at a central lower portion of each of the plurality of insulators, and a socket member fitted to a central upper portion of each of the plurality of insulators, with the shaft members of adjacent insulators fitted thereto; a step of attaching an elastic member including an elastic body so as to surround an outer periphery of the shaft member; Equipped with In the preparing step, As each of the plurality of insulators, a member having a plurality of folds arranged concentrically on a vertically lower side is prepared; In the step of attaching the elastic member, The elastic member is a member having a cylindrical portion configured to surround the outer periphery of the shaft member, and a flange portion extending radially from the cylindrical portion and closing at least a part of the space between one of the plurality of pleats and the shaft member. Manufacturing method of insulator string device. [Explanation of symbols]

[0127] 10 Insulator string device 100 insulators 120 Kasabe 122 Recessed portion inside the cap 140 Folds 200 Shaft member 300 Socket parts 320 fitting hole 340 Pin insertion hole 400 Elastic member 410 Cylindrical part 440 Projection piece 448 Drainage hole 450 skirt 480 Collar 490 Cover 492 Hook 600 Cotter pin 90 Comparative example of insulator string device 910 Insulators 914 Folds

Claims

1. A plurality of insulators; a shaft member provided at a central lower portion of each of the plurality of insulators; a socket member fitted to the central upper portion of each of the plurality of insulators, with the shaft members of adjacent insulators fitted thereto; an elastic member that is attached to surround the outer periphery of the shaft member and includes an elastic body; Equipped with Each of the plurality of insulators has a plurality of corrugations arranged concentrically vertically, The elastic member is a cylindrical portion configured to surround the outer periphery of the shaft member; a flange portion extending radially from the cylindrical portion and closing at least a portion of a space between one of the plurality of pleats and the shaft member; and the flange portion has an opening that penetrates from an outer peripheral end of the flange portion to an opening in the cylindrical portion, The elastic member further includes a cover portion that closes the opening of the flange portion. Insulator string device.

2. The entire cylindrical portion and the flange portion of the elastic member are semiconductive. The insulator string device according to claim 1 .

3. The fold closest to the outer peripheral edge of the flange and the flange are spaced apart from each other with a predetermined gap therebetween. The insulator string device according to claim 1 or 2.

4. A plurality of insulators; a shaft member provided at a central lower portion of each of the plurality of insulators; a socket member fitted to the central upper portion of each of the plurality of insulators, with the shaft members of adjacent insulators fitted thereto; an elastic member that is attached to surround the outer periphery of the shaft member and includes an elastic body; Equipped with Each of the plurality of insulators has a plurality of corrugations arranged concentrically vertically, The elastic member is a cylindrical portion configured to surround the outer periphery of the shaft member; a flange portion extending radially from the cylindrical portion and closing at least a portion of a space between one of the plurality of pleats and the shaft member; and the cylindrical portion and the flange portion of the elastic member are entirely semiconductive, The fold closest to the outer peripheral edge of the flange and the flange are spaced apart from each other with a predetermined gap therebetween. Insulator string device.

5. The gap between the flange and the fold closest to the outer circumferential edge of the flange is 1 mm or more and 10 mm or less. The insulator string device according to claim 1 or 4.

6. The flange portion is molded integrally with the cylindrical portion. The insulator string device according to claim 1 or 4.

7. The flange portion is configured as a separate body from the cylindrical portion. The insulator string device according to claim 1 or 4.

8. The insulator string device according to claim 1 or 4 is used. Elastic member.

9. a step of preparing a plurality of insulators, a shaft member provided at a central lower portion of each of the plurality of insulators, and a socket member fitted to a central upper portion of each of the plurality of insulators, with the shaft members of adjacent insulators fitted thereto; a step of attaching an elastic member including an elastic body so as to surround an outer periphery of the shaft member; Equipped with In the preparing step, As each of the plurality of insulators, a member having a plurality of folds arranged concentrically on a vertically lower side is prepared; In the step of attaching the elastic member, The elastic member is provided with a cylindrical portion configured to surround the outer periphery of the shaft member, and a flange portion extending radially from the cylindrical portion and closing at least a part of the space between one of the plurality of pleats and the shaft member, the flange portion having an opening penetrating from the outer periphery of the flange portion to an opening in the cylindrical portion, A cover portion that closes the opening of the flange portion is further attached as the elastic member. Manufacturing method of insulator string device.

10. A process of preparing a plurality of insulators, an axial member provided at the central lower portion of each of the plurality of insulators, and a socket member fitted to the central upper portion of each of the plurality of insulators, into which the axial members of adjacent insulators are fitted; a step of attaching an elastic member including an elastic body so as to surround an outer periphery of the shaft member; Equipped with In the preparing step, As each of the plurality of insulators, a member having a plurality of folds arranged concentrically on a vertically lower side is prepared; In the step of attaching the elastic member, The elastic member includes a cylindrical portion configured to surround the outer periphery of the shaft member, and a flange portion extending radially from the cylindrical portion and closing at least a part of a space between one of the plurality of pleats and the shaft member, and the cylindrical portion and the flange portion are entirely fitted with a semiconductive member, The fold closest to the outer peripheral edge of the flange and the flange are spaced apart from each other with a predetermined gap therebetween. Manufacturing method of insulator string device.

Images