JP2017134949A - Fault indicator for lightning arrester and lighting arrester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fault indicator for a lighting arrestor, whose configuration is simple, and which can be easily mounted on the existing lighting arrestor and used without modification of the lighting arrestor and can be visually recognized from the outside when the lighting arrestor is out of order, and also to provide the lighting arrestor.SOLUTION: A fault indicator for a lighting arrestor includes: a temperature sensing element 11 which is mounted so as to come into contact with a bottom part outer wall surface 110 of a lightning arrester main body and detects heat generated due to failure of the lighting arrestor 101: and an indicator 41 which is interlocked with the temperature sensing element 11 and equipped with a display tool for displaying the failure of the lighting arrestor. When heat generated due to the failure of the lighting arrestor 101 is detected, the temperature sensing element 11 acts on the indicator 41 so that the display tool 45 is displayed in a visually recognizable manner.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a lightning arrester failure display device and a lightning arrester capable of visually confirming a lightning arrester failure.

  FIG. 7 is a diagram showing a structure and a use state of a conventional typical lightning arrester 101. The lightning arrester 101 is a device that protects a power distribution device such as a pole transformer from lightning overvoltage, and has a ZnO element 105 with excellent non-linear characteristics in the vertical tube 103, and a line side terminal for connecting to the power distribution device on the upper part. 116. A ground side terminal 112 for connecting to the ground line is provided at the bottom.

  When the lightning arrester 101 is used, the lightning arrester 101 is fixed to the arm using the support band 121. Specifically, the support band 121 is attached to the lower outer peripheral surface of the soot tube 103, a lightning arrester mounting bracket 123 is mounted on the armrest, and the support band 121 and the lightning arrester mounting bracket 123 are fixed by a surge arrester mounting bolt 125.

  When a large lightning overvoltage is applied to the lightning arrester 101, it is discharged and the overvoltage is suppressed to a value smaller than the insulation level of the circuit. Further, the lightning arrester 101 has a self-restoring function, and when the lightning overvoltage disappears, the lightning arrester 101 itself cuts off the continuity of the system that flows after the lightning surge, and restores the distribution line to the original insulation state.

  The lightning arresters including the lightning arrester 101 shown in FIG. 7 basically have the durability to maintain the function for a long period of time. However, if the device is subjected to many lightning surges or a lightning surge greatly exceeding the rating, or the element is damaged due to aging. However, it can lead to ground faults and power outages. For this reason, it is necessary to detect the failure of the lightning arrester at an early stage, and many methods for detecting the failure of the lightning arrester have been proposed.

  For example, a method for detecting a failure of a lightning arrester by measuring leakage current with a measuring device, a method for determining a degree of deterioration of a lightning arrester from a response of the lightning arrester to a high voltage pulse (for example, refer to Patent Document 1), and the like. There are methods for detecting failure and deterioration.

  There is also a method of displaying a failure in a visible manner using a mechanical method. For example, there is a method in which a fuse is blown by a leakage current that continuously flows due to a failure, and an indicator is moved so as to be visible from the outside using the elastic force of a spring (see, for example, Patent Document 2 and Patent Document 3). There is also a method of popping out a failure display flag using the gas in the lightning arrester body that rises due to the failure of the lightning arrester (see, for example, Patent Document 4).

JP 2012-93191 A JP 2002-270330 A JP-A-5-343154 JP-A-4-22085

  When a lightning arrester described in Patent Documents 2 to 4 breaks down, a method of displaying a display device or a display tool so as to be visible from the outside can be detected at the time of patrol, leading to early detection of a lightning arrester failure. However, the method of displaying the display or the display tool described in Patent Documents 2 to 4 has a complicated structure and there is room for improvement.

  An object of the present invention is to provide a lightning arrester failure display device and a lightning arrester that have a simple structure and can be easily installed and used without modification to an existing lightning arrester, and can be visually recognized from the outside when the lightning arrester fails. It is to be.

  The present invention is a display provided with a temperature sensing element that is attached so as to be in contact with the outer wall surface of the lightning arrester body and detects heat generated due to the failure of the lightning arrester, and a display device that displays the malfunction of the lightning arrester in conjunction with the temperature sensing element. And the temperature sensing element acts on the indicator so that the indicator is displayed in a visually recognizable manner when heat generated due to the failure of the arrester is detected. Device.

  The lightning arrester failure display device of the present invention can be composed of a temperature sensing element that detects heat generated due to the failure of the lightning arrester, and a display that is linked to the temperature sensing element and displays this at the time of failure. It is. In addition, since the temperature sensing element that detects the failure of the lightning arrester is attached so as to be in contact with the outer wall surface of the lightning arrester body, it can be easily attached to an existing lightning arrester without modifying the lightning arrester.

  The lightning arrester failure display device of the present invention is characterized in that the temperature sensing element is attached so as to be in contact with the bottom outer wall surface of the lightning arrester body.

  Since a general lightning arrester has a flat outer wall surface at the bottom of the main body, it is easy to mount the temperature sensing element so as to be in contact with the outer wall surface, and it is easy to detect heat generated due to the failure of the lightning arrester. If the temperature sensing element is attached to the outer wall surface of the bottom portion of the lightning arrester body, the temperature sensing element can be fixed using the ground side terminal.

  In the lightning arrester failure display device of the present invention, the temperature sensing element is made of a member that is deformed by heat generated due to the failure of the lightning arrester, and the display device is held in the retracted state when the lightning arrester is normal. Further, the display device is deformed when a lightning arrester breaks down, acts on the display device so as to open the display device in a stored state, and is displayed so as to be visible when the display device is opened.

  Further, in the lightning arrester failure display device of the present invention, the indicator is made of a flexible belt-like member and wound up when stored, or the indicator is made of a foldable plate member and folded when stored, and the indicator is When opened, it hangs down linearly starting from one end.

  According to the present invention, when a lightning arrester breaks down, the band-shaped display device hangs down, so that it is easy to visually recognize the lightning arrester failure at an early stage. On the other hand, since the display can be stored compactly, the display can be downsized. A large space is not required for installing the lightning arrester failure display device, and it can be easily installed and used for existing lightning arresters.

  In the lightning arrester failure display device of the present invention, the temperature sensing element is a bimetal.

  Also, in the lightning arrester failure display device of the present invention, the temperature sensing element is in contact with the outer wall surface of the lightning arrester body and deforms by receiving heat, and a deformation amount that expands the deformation amount when the temperature sensing portion is deformed. And an enlarged portion.

  According to the present invention, since the temperature sensing element is provided with the deformation amount enlarging unit, it is possible to display the failure of the lightning arrester even when the amount of heat generated with the lightning arrester failure is small.

  In the lightning arrester failure display device of the present invention, the temperature sensing element is fixed to a grounding side terminal of the lightning arrester via a grounding side terminal screw.

  In the lightning arrester failure display device of the present invention, the indicator is fixed to the support band via a lightning arrester mounting bolt that connects the support band of the lightning arrester and the lightning arrester mounting bracket.

  According to the present invention, since the temperature sensing element can be fixed to the grounding side terminal of the lightning arrester and the display device can be fixed to the support band of the lightning arrester, it can be easily mounted and used on an existing lightning arrester without modification. be able to.

  Moreover, this invention is a lightning arrester characterized by including the lightning arrester main body and the said lightning arrester failure display apparatus.

  According to the present invention, there is provided a lightning arrester failure display device and a lightning arrester that have a simple structure and can be easily installed and used without modification to an existing lightning arrester, and can be visually recognized from the outside when the lightning arrester fails. can do.

It is a block diagram of the lightning arrester failure display apparatus 1 of 1st Embodiment of this invention. It is a figure which shows the use condition of the lightning arrester failure display apparatus 1 of FIG. It is a figure which shows the structure and use condition of the lightning arrester failure display apparatus 2 of 2nd Embodiment of this invention. It is a figure which shows the structure and use condition of the lightning arrester failure display apparatus 3 of 3rd Embodiment of this invention. It is a block diagram of the lightning arrester failure display apparatus 4 of 4th Embodiment of this invention. It is a figure which shows the use condition of the lightning arrester failure display apparatus 4 of FIG. It is a figure which shows the structure of the conventional typical lightning arrester 101, and the example of attachment.

  FIG. 1 is a configuration diagram of a lightning arrester failure display device 1 according to a first embodiment of the present invention, and FIG. 2 is a diagram showing a use state. In addition, the same code | symbol is attached | subjected to the structure same as the conventional lightning arrester 101 shown in FIG. 7, and description is abbreviate | omitted.

  The lightning arrester failure display device 1 is attached to the bottom outer wall surface 110 of the lightning arrester body, and is connected to the temperature sensing element 11 that detects heat generated when the lightning arrester 101 breaks down, and the temperature sensing element 11 so as to be detachable. And a display 41 that displays the lightning arrester 101 so as to be visible to the outside so as to notify the failure.

  The temperature sensing element 11 is made of a straight plate-like bimetal. The bimetal is not deformed (displaced) at a temperature generated when the lightning arrester 101 is normal, an outside air temperature, or a temperature when it receives direct sunlight, or a deformation amount (displacement amount) of a predetermined amount or less, and when the lightning arrester 101 breaks down. Use the one that deforms more than a predetermined amount when it receives the heat generated in the. Here, the predetermined deformation amount is a deformation amount necessary for the hook 17 described later to be detached from the bottom plate 58 of the display device 41 and the bottom plate 58 of the display device 41 to be opened.

  The temperature sensing element 11 may be any member that can be deformed so as to satisfy the above requirements, and a shape memory alloy and a shape memory polymer can be used in addition to a bimetal.

  A notch 15 is provided at the center of the temperature sensing element 11. This notch 15 is for dodging the ground side terminal 112 of the lightning arrester 101 when the temperature sensing element 11 is fixed to the bottom outer wall surface 110 of the lightning arrester body. Thereby, the temperature sensing element 11 can be attached to the center or almost the center of the bottom outer wall surface 110 of the lightning arrester body. However, the notch 15 may not be provided.

  The temperature sensing element 11 is longer than the diameter of the bottom outer wall surface 110 of the lightning arrester body, and the tip portion projects from the bottom outer wall surface 110 of the lightning arrester body in a state of being fixed to the bottom outer wall surface 110 of the lightning arrester body (see FIG. 2). ). An L-shaped hook 17 is fixed to the tip of the temperature sensing element 11.

  The hook 17 is for supporting the bottom plate 58 of the display device 41 so as not to open. The hook 17 also functions as a positioning member between the temperature sensing element 11 and the display device 41. The material of the hook 17 is not particularly limited. Instead of providing the hook 17, the temperature sensing element 11 may be extended and supported so that the bottom plate 58 of the display 41 does not open.

  About half of the rear side of the temperature sensing element 11 is fixed to the bottom outer wall surface 110 of the lightning arrester body so that the tip side is displaced downward when receiving heat. About half of the front side of the temperature sensing element 11 is in contact with the bottom outer wall surface 110 of the lightning arrester body, but is free with respect to the bottom outer wall surface 110 of the lightning arrester body. The manner in which the temperature detector 11 is fixed to the bottom outer wall surface 110 of the lightning arrester body is not limited to a specific method, but the lightning arrester body can be reliably detected so that the heat generated when the lightning arrester 101 fails can be detected. A method that can fix the temperature sensing element 11 in close contact with the bottom outer wall surface 110 is desirable.

  The indicator 41 includes an indicator 45 that informs the outside of the lightning arrester 101 when it fails, a case 51 that houses the indicator 45, and an attachment band 71 for fixing the case 51 to the support band 121 of the arrester 101. With.

  The display tool 45 is a strip-shaped member having flexibility, and is made of a synthetic resin material having insulating properties. Both the front and back surfaces of the display device 45 are colored with a conspicuous fluorescent color that is easily visible. Although the magnitude | size of the display tool 45 is not specifically limited, The magnitude | size which can be visually recognized easily when the lightning arrester 101 breaks down and falls from the case 51 is preferable.

  One end of the display tool 45 is fixed to the side surface of the case 51 and is housed in the case 51 in a rolled state. For this reason, even if the length of the display tool 45 is long, it can be stored compactly.

  The case 51 is a member that houses the display tool 45. The case 51 has a rectangular shape, the top surface 55 and the four side surfaces 56 are fixed walls, and the bottom surface 57 is a movable wall. Specifically, a bottom plate 58 that forms a bottom surface 57 is rotatably fixed to the bottom of one side wall via a hinge 60. For this reason, when the top surface 55 is directed upward, the bottom plate 58 is in a state of being hung and opened.

  The size and shape of the case 51 are not particularly limited, as long as a space capable of storing the rolled display tool 45 can be secured. Unnecessarily increasing the size is uneconomical, and also requires a large space for mounting the indicator 41, which is not preferable. Needless to say, the case 51 preferably has a shape and a structure that are easy to manufacture.

  The attachment band 71 is for fixing the case 51 to the support band 121 of the lightning arrester 101, and is fixed to the top surface 55 of the case 51. The attachment band 71 is made of a plate-like member having a U-shaped longitudinal section, is configured to be able to be locked to the support band 121, and has a through hole 72 through which the lightning arrester attachment bolt 125 is inserted. The through-hole 72 is a long hole, and can be moved to the lightning arrester 101 side or the bracelet side when being fixed via the lightning arrester mounting bolt 125.

  The height of the display 41 including the attachment band 71 is such that when the display 41 is attached to the support band 121 of the lightning arrester, the position of the bottom surface 57 of the case 51 is the top surface of the horizontal portion 18 of the hook 17 of the temperature sensing element 11. Is set to be the same height or slightly higher.

  Next, with reference to FIG. 2, the installation procedure of the lightning arrester failure display device 1 to the lightning arrester 101 and the operation of the lightning arrester failure display device 1 will be described.

  After the display tool 45 is accommodated in the rounded case 51, the indicator 41 temporarily prepared with tape is prepared so that the bottom plate 58 is not opened. The attachment band 71 of the display device 41 is inserted into the support band 121 of the lightning arrester 101, and is temporarily fixed together with the support band 121 to the lightning arrester attachment 123 fixed to the brace via the lightning arrester attachment bolt 125. The side surface 56 on the lightning arrester side of the case 51 is moved so as to be in light contact with the standing portion 19 of the hook 17 of the temperature sensing element 11 and then firmly fixed with the lightning arrester mounting bolt 125. Remove the tape that was temporarily fixed.

  The operation of the lightning arrester failure display device 1 will be described. In the failure display device 1 attached to the lightning arrester 101 as described above, when the lightning arrester 101 breaks down and a leakage current flows through the lightning arrester 101, the ZnO element (not shown) generates heat, and the temperature of the bottom outer wall surface 110 of the lightning arrester body also increases. To rise. Accordingly, the temperature sensing element 11 in contact with the bottom outer wall surface 110 of the lightning arrester body receives heat, and the tip and the hook 17 are displaced downward.

  When the hook 17 is displaced downward and the engagement between the bottom plate 58 of the case 51 and the hook 17 is released, the bottom plate 58 of the case 51 rotates around the hinge 60 and the bottom plate 58 is hung. As a result, the strip-shaped display tool 45 housed in the case 51 hangs out of the case 51.

  Since the display tool 45 hanging down in a belt shape is colored in a fluorescent color that is easy to visually recognize on both the front and back, it can be easily visually recognized from the outside or at night. Moreover, since the display tool 45 that hangs down in a belt shape is shaken when the wind blows, the visual recognition from the outside is further facilitated.

  As described above, the lightning arrester failure display device 1 can display the failure of the lightning arrester 101 in a visible manner. The lightning arrester failure display device 1 has a very simple structure. The temperature sensing element 11 is fixed to the bottom outer wall surface 110 of the lightning arrester main body, and the display 45 is also fixed to the support band 121 of the lightning arrester. It can be easily installed and used without any problems. Further, since the display device 45 is stored in a compact manner, the display device 41 can also be reduced in size, so that a large space is not necessary for mounting the lightning arrester failure display device 1, and it can be easily mounted and used on the existing lightning arrester 101. be able to.

  FIG. 3 is a diagram illustrating a structure and a usage state of the lightning arrester failure display device 2 according to the second embodiment of the present invention. The same components as the lightning arrester failure display device 1 of the first embodiment of the present invention shown in FIGS. 1 and 2 and the conventional lightning arrester 101 shown in FIG.

  The basic configuration of the lightning arrester failure display device 2 is the same as that of the lightning arrester failure display device 1 of the first embodiment, and this is the case when the temperature sensing element 12 attached to the bottom outer wall surface 110 of the lightning arrester body and the lightning arrester 101 break down. And a display 42 for displaying.

  The temperature sensing element 12 is made of a straight plate-like bimetal and is the same as the temperature sensing element 11 of the first embodiment except that the hook 17 is not provided.

  Similar to the display device 41 of the first embodiment, the display device 42 includes a display device 45 that informs the outside of the lightning arrester 101 when it fails, a case 52 that houses the display device 45, and the case 52 that is connected to the lightning arrester 101. And an attachment band 71 for fixing to the support band 121.

  The basic configuration of the display 42 is the same as the display 41 of the first embodiment, but the structure of the case 52 is different. In the display 42, as with the display 41, the bottom plate 58 is rotatably fixed to the case 52 via a hinge 60, but includes a locking means so that the bottom plate 58 does not open due to its own weight.

  This locking means includes a claw 65 provided on the tip end side of the surface that becomes the inner surface of the bottom plate 58 when closed, and a claw 66 provided on the side wall 56 at the lower end of the inner surface. When a certain force is applied to the bottom plate 58 in the closing direction, the claw 65 on the bottom plate gets over the claw 66 on the side wall and locks it. When a certain force is applied downward to the protruding portion 59 at the tip of the bottom plate 58 in the closed state, the claw 65 is detached from the claw 66 and the bottom plate 58 is opened.

  The bottom plate 58 has a size such that the front end portion slightly protrudes from the side surface (side wall) 56 of the case 52 when closed. The protruding portion 59 is a portion to be pushed down when the temperature sensing body 12 is displaced, and need not be unnecessarily enlarged as long as the temperature sensing body 12 can be locked.

  The installation procedure of the lightning arrester failure display device 2 to the lightning arrester 101 is basically the same as that of the lightning arrester failure display device 1, but when attaching, the back surface of the tip of the temperature sensing element 12 is the protruding portion of the bottom plate of the case 52. The upper surface of 59 is lightly touched (see FIG. 3A), or the back surface of the tip of the temperature sensing element 12 is slightly above the upper surface of the protruding portion 59 of the bottom plate. Moreover, it attaches so that the front-end | tip part of the temperature sensing body 12 may contact with the side wall 56, or it may leave a slight clearance gap with the side wall 56 (refer FIG. 3A part).

  Like the lightning arrester failure display device 1, the lightning arrester failure display device 2 attached to the lightning arrester 101 in this manner is in contact with the bottom outer wall surface 110 of the lightning arrester body when the lightning arrester 101 fails and a leakage current flows through the lightning arrester 101. The warm body 12 receives heat and its tip portion is displaced downward. As a result, the bottom plate 58 is pushed down, the claw 65 comes off from the claw 66, the bottom plate 58 opens, and the display tool 45 hangs out of the case 52.

  The operation and effect of the lightning arrester failure display device 2 is basically the same as that of the lightning arrester failure display device 1, but the lightning arrester failure display device 2 is easy to use because the bottom plate 58 can be held closed. Further, since the temperature sensing element 12 does not require the hook 17, the structure is simple and inexpensive.

  FIG. 4 is a diagram showing the structure and use state of the lightning arrester failure display device 3 according to the third embodiment of the present invention. 1 to 3, the same components as the lightning arrester failure display devices 1 and 2 of the first and second embodiments of the present invention, and the conventional lightning arrester 101 shown in FIG. Description is omitted.

  The basic configuration of the lightning arrester failure display device 3 is the same as that of the lightning arrester failure display device 1 of the first embodiment. This is when the temperature sensing element 21 attached to the bottom outer wall surface 110 of the lightning arrester main body and the lightning arrester 101 break down. And a display 43 for displaying.

  Although the temperature sensing element 21 is made of a plate-like bimetal like the temperature sensing elements 11 and 12, the shape is greatly different from that of the temperature sensing elements 11 and 12. Further, the manner in which the temperature sensing element 21 is attached to the lightning arrester 101 is also different from the temperature sensing elements 11 and 12 of the first and second embodiments.

  The temperature sensing element 21 includes a mounting portion 22 for fixing to the lightning arrester 101, a temperature sensing portion 23 that contacts the bottom portion 111 of the lightning arrester body and deforms by receiving heat, and a deformation that increases the deformation amount of the temperature sensing portion 23 that deforms by receiving heat It has a quantity expansion unit 25.

  The attachment part 22 is a part for fixing to the lightning arrester 101, and fixes the temperature sensing body 21 using the ground side terminal 112 of the lightning arrester. The attachment portion 22 has an overturned L shape, and has a through hole 27 through which the ground side terminal screw 113 is inserted on the vertical portion side. The horizontal end portion of the attachment portion 22 is bent upward, and the temperature sensing portion 23 is connected to the bent tip portion.

  The temperature sensing unit 23 is in close contact with the bottom outer wall surface 110 of the lightning arrester main body, is a part that detects and deforms heat generated when the lightning arrester 101 breaks down, and one end part is connected to the end part of the attachment part 22. The shape of the temperature sensing part 23 is the same as that of the temperature sensing element 12 of the second embodiment. Like the temperature sensing element 11 of the first embodiment, the temperature sensing part 23 is arranged at the center of the bottom outer wall surface 110 of the lightning arrester main body or A notch portion 15 is provided to be attached substantially at the center. It is the same as the temperature sensing elements 11 and 12 that the notch 15 may be omitted.

  The deformation amount expanding unit 25 is a part that expands the deformation amount of the temperature sensing unit 23 that is deformed by receiving heat. The deformation amount enlargement unit 25 has an L-shape and is connected to the tip 24 of the temperature sensing unit so as to be orthogonal to the temperature sensing unit 23, and the tip horizontal unit 26 prevents the bottom plate 58 of the display 43 from being opened. To support.

  The amount of displacement (deformation) of a member that deforms due to heat, such as bimetal, is proportional to the length. In the case of two bimetals having different lengths, the displacement amount of the tip is larger in the case of a long bimetal. The temperature sensing body 21 is provided with an L-shaped deformation amount enlargement portion 25 at the tip portion 24 of the temperature sensing portion, and the water tip horizontal portion 26 of the deformation amount enlargement portion is compared with the tip portion 24 of the temperature sensing portion. Since the distance (horizontal direction) from the bottom outer wall surface 110 of the lightning arrester main body is long, the displacement amount of the tip horizontal portion 26 of the deformation amount expanding portion is compared with the displacement amount of the tip portion 24 of the temperature sensing portion. large.

  In the lightning arrester failure display device in which the temperature sensing element 21 is attached to the bottom outer wall surface 110 of the lightning arrester and the indicator 43 is attached to the support band 121 as in this embodiment, the second embodiment is intended to increase the amount of displacement of the temperature sensing element. If the same shape as the temperature sensing element 12 is adopted and the temperature sensing element 12 is simply lengthened, the display 43 must be made small due to the installation space. In such a display, the display tool 45 to be accommodated is shortened.

  On the other hand, in the lightning arrester failure display device 3 of the present embodiment, by using the temperature sensing element 21 having the above structure, the displacement amount of the temperature sensing element 21 is increased, and the display 43 is formed in a vertically long shape. The internal volume of the case 53 is secured. Thereby, the long display tool 45 can be used.

  The temperature sensing element 21 may be composed entirely of bimetal or a material that deforms by receiving heat. However, since the temperature receiving part is only the temperature sensing part 23, only the temperature sensing part 23 is deformed by receiving bimetal or heat. A material to be used may be used.

  Unlike the temperature sensing elements 11 and 12 of the first and second embodiments, the temperature sensing element 21 has an attachment portion 22, so that it can be easily attached to the existing lightning arrester 101. However, similarly to the temperature sensing elements 11 and 12 of the first and second embodiments, the temperature sensing element 21 may be attached directly to the bottom outer wall surface 110 of the lightning arrester body without the mounting portion 22. . Conversely, the temperature sensitive bodies 11 and 12 of the first and second embodiments may be provided with an attachment portion 22 and fixed in the same manner as in this embodiment.

  The display device 43 has a vertically long shape, but the other configuration is the same as the display devices 41 and 42 of the first and second embodiments. One end of the display device 45 is fixed to the ceiling surface 55.

  The attachment procedure of the display device 43 to the support band 121 is the same as that of the display device 11 of the first embodiment. When the display 43 is attached to the support band 121, the tip of the tip horizontal portion 26 of the enlarged portion of the temperature sensing body 21 is attached so as to support the bottom plate 58 from below. The operation of the lightning arrester failure display device 3 is the same as the operation of the lightning arrester failure display device 1.

  The effect of the lightning arrester failure display device 3 is basically the same as that of the lightning arrester failure display device 1, but the lightning arrester failure display device 3 has a function of expanding the deformation amount of the portion where the temperature sensing element 21 is deformed by heat. Therefore, compared with the lightning arrester failure display devices 1 and 2, it is possible to notify the failure of the lightning arrester 101 from the stage where the temperature of the bottom outer wall surface 110 of the lightning arrester is low.

  FIG. 5 is a configuration diagram of the lightning arrester failure display device 4 according to the fourth embodiment of the present invention, and FIG. 6 is a diagram showing a use state of the lightning arrester failure display device 4. The same components as those of the lightning arrester failure display devices 1, 2, 3 of the first to third embodiments of the present invention shown in FIGS. 1 to 4 and the conventional lightning arrester 101 shown in FIG. The description is omitted.

  The basic configuration of the lightning arrester failure display device 4 is the same as that of the lightning arrester failure display device 1 of the first embodiment. This is when the temperature sensing element 31 attached to the bottom outer wall surface 110 of the lightning arrester main body and the lightning arrester 101 fail. Display 81. Furthermore, it has the pressing tool 37 which presses the temperature sensing body 31 against the bottom part outer wall surface 110 of a lightning arrester main body.

  The temperature sensing element 31 is made of an L-shaped plate-like bimetal and, like the temperature sensing element 21 of the third embodiment, is in contact with the mounting portion 32 for fixing to the lightning arrester 101 and the bottom outer wall surface 110 of the lightning arrester body. It has a temperature sensing part 34 that is deformed by heat.

  The attachment part 32 is a part for fixing to the lightning arrester 101, and corresponds to a part in the vertical direction. The mounting portion 32 is provided with a through hole 33 through which the ground side terminal screw 113 is inserted in order to fix the temperature sensing body 31 using the ground side terminal 112 of the lightning arrester.

  The temperature sensing part 34 is in close contact with the bottom outer wall surface 110 of the lightning arrester body, is a part that detects and deforms heat generated when the lightning arrester 101 breaks down, and corresponds to a horizontal part. The region of the temperature sensing part 34 that actually contacts the bottom outer wall surface 110 of the lightning arrester body is about half of the temperature sensing element 21 of the third embodiment. The temperature sensing part 34 is not provided with a notch.

  Unlike the lightning arrester failure display devices 1, 2, and 3 of the first to third embodiments, the lightning arrester failure display device 4 is a press for bringing the temperature sensing portion 34 of the temperature sensing body 31 into close contact with the bottom outer wall surface 110 of the lightning arrester body. It has a tool 37. The pressing tool 37 is an L-shaped plate-like body, and a through hole 39 through which the ground side terminal screw 113 is inserted is provided in the vertical piece 38. The pressing tool 37 is fixed to the ground side terminal 112 together with the temperature sensing element 31 so that the horizontal piece 40 presses the temperature sensing part 34 of the temperature sensing element 31 against the bottom outer wall surface 110 of the lightning arrester body from below.

  When the temperature sensing part 34 of the temperature sensing element 31 is fixed to the lightning arrester body so as to be pressed against the bottom outer wall surface 110 using the pressing tool 37, heat transfer from the bottom outer wall surface 110 of the lightning arrester body is improved. Even after the warm body 31 receives heat and the tip 35 of the temperature sensing part is displaced, the opposite tip side of the temperature sensing part can continue to receive heat from the bottom outer wall surface 110 of the lightning arrester body.

  The display device 81 includes a display tool 82 and a mounting band 91 connected to the display tool 82. Similar to the display tool 45 of the first embodiment of the present invention, the display tool 82 notifies the outside of the lightning arrester 101 when it fails. However, the display tool 82 is larger in structure than the display tool 45 of the first embodiment. Different. Accordingly, there is no case for storing the display tool 82.

  The display tool 82 is formed by connecting a plurality of elongated plate-like members 83 via hinges 88 so as to be foldable. If the display tool 82 is extended, it will become one long board | plate with the hinge 88 interposed in the middle. Both the plate-like member 83 and the hinge 88 are made of a synthetic resin material having insulating properties.

  Among the plate-like members 83, the other plate-like members 85 except for the plate-like members 84 and 86 located on both sides when folded are coated with a conspicuous fluorescent paint that is easily visible on both the front and back sides. The plate-like members 84 and 86 located on both sides when folded are coated with the same fluorescent paint as the plate-like member 85 only on the inner side in the folded state. For this reason, in the state in which the display tool 82 is folded, the paint applied to the plate-like member 83 cannot be seen.

  The attachment band 91 extends the plate member 86 at the end upward, is bent so that the extended portion is orthogonal to the plate member 86, and the distal end side of the extended portion is bent at a right angle so that the locking portion 92 is formed. Is formed. The locking portion 92 is provided with a notch portion 93 into which the lightning arrester mounting bolt 125 is fitted. The height of the attachment band 91 is determined so that the tip 35 of the temperature sensing part is located near the upper end of the plate-like member 84 at the end on the lightning arrester 101 side when attached to the lightning arrester 101 of the lightning arrester failure display device 4. ing.

  Next, the procedure for attaching the lightning arrester failure display device 4 to the lightning arrester 101 and the operation of the lightning arrester failure display device 4 will be described with reference to FIG.

  The display 81 is attached before the temperature sensing body 31. Prior to installation, the indicator 81 folds the indicator 82 and temporarily holds it with tape so that they cannot be opened.

  The indicator 81 is fixed using a lightning arrester mounting bolt 125 that connects the lightning arrester mounting bracket 123 and the support band 121. Specifically, the notch 93 of the mounting band 91 of the indicator 81 is fitted into the threaded portion 126 of the lightning arrester mounting bolt 125 protruding from the nut 128 screwed into the lightning arrester mounting bolt 125, and fixed with the nut 130.

  The temperature sensing element 31 is fixed using the grounding side terminal screw 113 so that the tip 35 of the temperature sensing part is in the arm metal direction and the temperature sensing part 34 is in contact with the bottom outer wall surface 110 of the lightning arrester body. The Specifically, the through hole 33 of the attachment portion 32 of the temperature sensing body 31 is inserted into the screw portion 114 of the ground side terminal screw 113 that is attached to the ground side terminal 112 and protrudes from the ground side terminal 112, and further above it. The through hole 39 of the vertical piece 38 of the pressing tool 37 is inserted and fixed with a nut 118.

  When fixing the temperature sensing element 31 and the pressing tool 37, the pressing tool 37 is pushed up and fixed so that the temperature sensing part 34 of the temperature sensing element 31 is in close contact with the bottom outer wall surface 110 of the lightning arrester body. Further, the tip 35 of the temperature sensing part of the temperature sensing body 31 is fixed so as to contact the outermost plate member 84 of the display tool 81. The position adjustment of the tip 35 of the temperature sensing part of the temperature sensing element 31 can be performed by inserting a washer 119 between the ground side terminal 112 and the temperature sensing element 31. Note that the outermost plate-like member 84 of the display tool 82 may abut on the tip portion 35 of the temperature sensing portion of the temperature sensing body 31 in a state of being slightly tilted.

  In the lightning arrester failure display device 4, the temperature sensing element 31 is attached to the threaded portion 114 of the grounding side terminal screw 113 projecting from the grounding side terminal 112, and the indicator 81 is attached to the lightning arrester that projects from the nut 128 that is screwed to the lightning arrester mounting bolt 125. It is attached to the threaded portion 126 of the bolt 125. For this reason, the temperature sensing element 31 and the indicator 81 can be fixed without removing the ground side terminal screw 113 and the lightning arrester mounting bolt 125, and can be easily attached. However, the attachment method of the temperature sensing element 31 and the display 81 is not limited to this.

  Next, the operation of the lightning arrester failure display device 4 will be described. When the lightning arrester 101 breaks down and a leakage current flows through the lightning arrester 101, the ZnO element (not shown) generates heat, and the temperature of the bottom outer wall surface 110 of the lightning arrester body also rises. The temperature sensing element 31 in contact with the bottom outer wall surface 110 of the lightning arrester body receives heat and the tip 35 of the temperature sensing part is displaced upward. At this time, the anti-tip portion side of the temperature sensing portion remains in contact with the bottom outer wall surface 110 of the lightning arrester body.

  When the tip 35 of the temperature sensing part of the temperature sensing body 31 is displaced upward and is disengaged from the outermost plate-like member 84 of the display device 82, the outermost plate-like member 84 falls and falls. Along with this, the other plate-like member 85 is also lowered, and the display device 82 becomes a single band shape with the plate-like member 84 at the bottom.

  The display device 82 suspended in a belt-like shape is coated with a conspicuous color fluorescent paint on the front and back of the plate-like member 85 and also on one side of the plate-like members 84 and 86, so that it can be easily removed from the outside. It can be visually recognized. Moreover, since the display tool 82 hanging down in a band shape is formed by connecting a plurality of plate-like members 83 to a hinge 88, it swings when the wind blows. Thereby, the main-body part 82 suspended in strip | belt shape can also be visually recognized easily from the outside.

  As described above, the lightning arrester failure display device according to the present invention has been described using the lightning arrester failure display device according to the first to fourth embodiments, the lightning arrester failure display device according to the present invention has a simple configuration, and is externally attached. Therefore, it can be easily mounted and used on an existing lightning arrester without modifying it, and when the lightning arrester breaks down, it can be displayed on the outside. Moreover, if it is set as the lightning arrester which integrated the said lightning arrester failure display apparatus and the lightning arrester main body, it can be used in comfort.

  The lightning arrester failure display device according to the present invention and the lightning arrester including the lightning arrester failure display device according to the present invention have been described above using the lightning arrester failure display device according to the first to fourth embodiments. The lightning arrester is not limited to the above-described embodiment, and can be used by changing it without changing the gist. In the said embodiment, although demonstrated using the lightning arrester provided with a ZnO element, elements other than a ZnO element may be sufficient as an element.

  The kind of lightning arrester to which the lightning arrester failure display device according to the present invention is applicable is not particularly limited, and can be used for a lightning arrester without a series gap, a lightning arrester with a series gap, and other lightning arresters. In short, when a lightning arrester breaks down, it may be a lightning arrester that generates heat, and the cause of the failure is not particularly limited. The failure includes a case where a lightning arrester generates heat due to leakage current due to deterioration over time.

  In the above embodiment, a lightning arrester support band, a lightning arrester mounting bracket, and a lightning arrester mounting bolt are used for fixing the display, but the fixing destination of the display is not particularly limited. Therefore, the method for fixing the lightning arrester main body to the arm metal may be other than this embodiment.

  As described above, the preferred embodiments have been described with reference to the drawings. However, those skilled in the art will readily understand various changes and modifications within the obvious scope by looking at the present specification. Therefore, such changes and modifications are interpreted as being within the scope of the invention defined by the claims.

1, 2, 3, 4 Lightning arrester failure display device 11, 12, 21, 31 Temperature sensing element 22 Mounting portion 23 Temperature sensing portion 25 Deformation amount expanding portion 32 Mounting portion 34 Temperature sensing portion 41, 42, 43, 81 Display 45 Display 51, 52, 53, Case 58 Bottom plate 59 Bottom plate projection 60 Hinge 71 Mounting band 81 Display 82 Display 83 Plate member 88 Hinge 91 Mounting band 101 Lightning arrestor 105 ZnO element 110 Bottom outer wall surface 112 of lightning arrester main body Side terminal 113 Ground side terminal screw 114 Ground side terminal screw screw part 118 Nut 119 Washer 121 Lightning arrester support band 123 Lightning arrester mounting bracket 125 Lightning arrester mounting bolt 126 Lightning arrester mounting bolt thread part 130 Nut

Claims (9)

A temperature sensing element that is attached so as to be in contact with the outer wall surface of the lightning arrester body and detects heat generated due to the failure of the lightning arrester,
A display device comprising a display device for displaying a lightning arrester failure in conjunction with the temperature sensing element;
Have
The temperature sensing element acts on the display device so that the display device is displayed so as to be visible when heat generated due to the failure of the lightning device is detected.   The lightning arrester failure display device according to claim 1, wherein the temperature sensing body is attached so as to be in contact with the bottom outer wall surface of the lightning arrester main body. The temperature sensing element is composed of a member that is deformed by heat generated with a lightning arrester failure,
The indicator is held in a stored state when the lightning arrester is normal,
The temperature sensing element is deformed when a lightning arrester breaks down, and acts on the indicator to open the indicator in a stored state.
The lightning arrester failure display device according to claim 1 or 2, wherein the display device is displayed so as to be visible when the display tool is opened. The indicator is made of a flexible belt-like member and wound up when stored, or the indicator is made of a foldable plate-like member and folded when stored,
4. The lightning arrester failure display device according to claim 3, wherein when the display tool is opened, the lightning arrester failure display device hangs down linearly starting from one end portion. 5.   The lightning arrester failure display device according to any one of claims 1 to 4, wherein the temperature sensing body is a bimetal. The temperature sensing element is in contact with the outer wall surface of the lightning arrester body and receives heat to deform, and
A deformation amount enlargement portion for expanding the deformation amount when the temperature sensing portion is deformed;
The lightning arrester failure display device according to any one of claims 1 to 5, characterized by comprising:   The lightning arrester failure display device according to any one of claims 1 to 6, wherein the temperature sensing body is fixed to a grounding side terminal of a lightning arrester via a grounding side terminal screw.   The said indicator is fixed to the said support band through the lightning arrester attachment bolt which connects the support band of a lightning arrester and a lightning arrester attachment bracket, The said any one of Claim 1-7 characterized by the above-mentioned. The described lightning arrester failure display device. A lightning arrester body,
A lightning arrester failure display device according to any one of claims 1 to 8,
A lightning arrester characterized by including.

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