JP2014120276A - Shock absorbing device for disconnector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an insulator from being damaged even when receiving an excessive earthquake motion exceeding a movable limit.SOLUTION: A shock absorbing device 10 which is interposed between vertically neighboring insulators constituting an operation insulator for transmitting torque for opening/closing a disconnector comprises a universal joint 21 and a damper 22 mounted within the universal joint. In the universal joint 21, a cross joint 25 is held between an upper coupling 26 and a lower coupling 27 and integrated using a pin 28. The damper is formed from ring springs 33 accommodated in an accommodation container 31 and a guide cap 32. The accommodation container and the guide cap are interlocked by a guide pin 40 and apply initial loads to the ring springs while being restricted in a maximum separation distance therebetween.

Description

  The present invention relates to a shock absorber for a disconnector.

  FIG. 1 shows an example of a disconnecting switch 1 installed in a conventional 500 kV substation. The conductive portion 2 of the disconnector 1 is installed on the top of the insulator device 4 that is erected on the gantry 3 installed on the ground. The conductive portion 2 of the disconnector 1 installed on the top of the insulator device 4 includes a hinge portion 5 that rotates at the apex, a bat side blade 6 that is connected to the hinge portion 5 and extends in the horizontal direction, and the bat side blade. 6 includes a main contact portion (butt) 7 and a shield ring 8 attached to the front end of 6. The butt side blade 6, the main contact portion 7, and the shield ring 8 rotate together with the rotation of the hinge portion 5. The hinge portion 5 rotates forward and backward by receiving a force from a driving source such as a battery power source. This type of disconnector is disclosed in Patent Document 1, for example.

  The insulator device 4 includes a support insulator 11 that supports the conductive portion 2 and an operation insulator 12 that transmits a rotational force to the hinge portion 5. One support insulator 11 is formed by connecting a plurality of insulators 11a in series. Three support insulators 11 are used, and each support insulator 11 is assembled to each side of a triangular pyramid to form a tower. The conductive portion 2 is installed on the tower formed by the three support insulators 11. The operation insulator 12 is arranged so that the center of the triangular pyramid formed by the three support insulators 11 extends vertically. This operation insulator 12 is also formed by connecting a plurality of insulators 12a in series. With this operation, the upper end of the insulator 12 is linked to the hinge portion 5.

  The support insulator 11 is formed as a single linear thin rod body by connecting a plurality (four in the illustrated example) of insulators 11a with bolts. In addition, the conventional operation insulator 12 includes a plurality of insulators 12 connected by bolts to form a single linear bar as a whole. On the other hand, as shown in FIGS. 1 and 2, there is an operation in which an intermediate portion of an operation wheel 12, that is, an intermediate connection portion 14 formed of a universal joint is connected between adjacent insulators 12 a.

  For example, the intermediate connecting portion 14 has an intermediate pin joint structure as shown in FIG. That is, the cross-shaped joint 14a is sandwiched between the upper coupling 14b and the lower coupling 14c and integrated using the pin 14d. The cross-shaped joint portion 14a / pin 14d has a pin joint structure and is configured to be universally movable. As shown in FIG. 4B, the intermediate connecting portion 14 can rotate forward and backward within a predetermined angle range around the axis of a pair of pins 14d arranged in the same straight line. Accordingly, the upper coupling 14b and the lower coupling 14c are universally movable by rotating by a predetermined angle around two orthogonal axes. And as shown to Fig.4 (a), the upper side coupling 14b and the lower side coupling 14c are connected with the insulator 12a.

  For example, when the operation insulator 12 is shaken by excessive earthquake motion, if all the insulators 12a are directly connected by bolts or the like, the thin rod-like operation insulator 12 is curved as a whole, and if the allowable stress of the insulator 12a is exceeded, The insulator 12a is damaged. However, when the intermediate connecting portion 14 is provided as described above, even if the operation wheel 12 is shaken due to excessive earthquake motion, the intermediate connecting portion 14 moves universally as shown in FIG. The center line L2 of the operated insulator 12 (insulator 12a) is tilted with respect to the reference line L1 which is the center of the insulator when it is straight, but the two insulators 12a on the upper side of the intermediate connecting portion 14 and the bottom The two insulators 12a on the side can each maintain a straight line shape, and even if they are curved, the degree can be suppressed, and damage to the insulator 12a can be prevented.

Real Kosho 45-9218

  The intermediate connecting portion 14 of the pin joint structure described above has a limited range of movement in terms of structure. When the limit of the movable range is reached, the upper coupling 14b and the lower coupling 14c come into contact with each other. Therefore, when an excessive earthquake motion exceeding the movable limit is received, the operation wheel 12 and the intermediate coupling portion 14 are vigorously shaken, and when the intermediate coupling portion 14 reaches the movable limit, the upper coupling 14b and the lower coupling 14c are connected to each other. Contact and further movement is prevented. Therefore, the intermediate connecting portion 14 changes from a movable structure to a fixed structure. As a result, similar to the operation wheel without mounting the intermediate connecting portion 14, the operation wheel 12 is bent and deformed like a dogleg as a whole, and tension is applied. Further, the upper coupling 14b and the lower coupling 14c collide violently due to the earthquake motion, and a large impact force is generated, and the impact force is transmitted to the insulator 12a joined to the intermediate connecting portion 14. And when the force by the superimposition of the impact force and the tension resulting from the bent state exceeds the proof strength of the insulator, the insulator 12a may be destroyed.

  In order to solve the above-described problems, an impact buffering device for a disconnector according to the present invention is (1) an impact buffering device interposed between insulators adjacent to the upper and lower sides of the disconnector, and the insulator and lower connected to the upper side. Arranged so as to be interposed between a universal joint with a variable angle between the insulators connected to the side, an upper connecting member connected to the upper insulator of the universal joint, and a lower connecting member connected to the lower insulator The damper device absorbs vibration energy between the operation insulators and absorbs an impact generated based on an operation in which the distance between the upper connecting member and the lower connecting member is rapidly reduced. It was supposed to be.

  The upper connecting member corresponds to the upper coupling 26 in the embodiment, and the lower connecting member corresponds to the lower coupling 27 in the embodiment. In this way, the operation insulator is divided into an upper region and a lower region by interposing the shock absorbing device of the present invention between the upper insulator and the lower insulator. Note that the number of insulators constituting the upper region and the number of insulators constituting the lower region may be arbitrary, and may be the same in the upper and lower sides or different. Since the shock absorber is equipped with a universal joint, the angle formed by the upper insulator and the lower insulator easily changes at the universal joint when a force is applied in the direction in which the operation insulator bends due to, for example, earthquake motion. The entire operation insulator vibrates without greatly curving each insulator, and damage to each insulator is suppressed. Since the damper device is provided in the universal joint, when the angle formed by the upper insulator and the lower insulator changes, the relative angle between the upper connecting member and the lower connecting member also changes. Any part of the periphery of both connecting members approaches and separates from the opposite side. Then, an impact that compresses the damper device is applied by the approach, and the damper device absorbs the vibration energy and absorbs the shock. Therefore, for example, even if an excessive earthquake motion occurs, it is possible to absorb an impact by the damper device, suppress an excessive stress from being applied to the insulator constituting the operation insulator, and prevent the insulator from being damaged.

  (2) The said insulator is good to comprise the operation insulator which transmits the rotational force for opening and closing of a disconnector.

  (3) The damper device may be configured using a spring member. (4) The spring member may be a disc spring or a ring spring. If a spring member is used, durability is good and maintenance-free can be realized. In particular, it is preferable to use a ring spring rather than a disc spring because a high buffering effect and damping effect can be obtained.

  (5) It is good to provide the initial load loading structure which applies an initial load with respect to the said ring spring. If an initial load is applied, for example, the region where the spring is stable and there is no loss and the hysteresis is large, hysteresis characteristics from the beginning when the upper connecting member begins to tilt and the distance between the upper connecting member and the lower connecting member begins to shorten. It is preferable because it can be used in a region where the above is fully utilized.

  (6) The damper device includes a storage container having an upper opening for storing the ring spring, and a guide cap disposed on an upper portion of the storage container so as to be movable up and down. And a linkage unit that is mounted inside the damper device and cooperates with the storage container and the guide cap so as to limit a maximum separation distance between the storage container and the guide cap. The ring spring may be compressed even when located at a separation distance. The cooperation means corresponds to the guide pin 40 in the embodiment. The present invention is realized by the first embodiment. If it does in this way, even if an upper side connection member leaves | separates from a guide cap, for example, since the state to which the initial load was added with respect to a ring spring can be maintained, it is preferable.

  (7) The damper device includes a storage container having an upper opening that stores the ring spring, and a guide cap that is disposed on an upper portion of the storage container so as to be movable up and down, and the initial load loading structure includes: The guide cap may be urged downward from the outside of the damper device so that the ring spring is compressed in a normal state with no load. The present invention is realized by the second embodiment.

  In the present invention, for example, even when an excessive earthquake motion exceeding the movable limit of the universal joint is received, vibration energy and impact can be absorbed by the damper device, and damage to the insulator can be prevented.

It is a figure which shows an example of the conventional disconnector. Fig. 2 is a diagram showing a portion of an operation insulator, (a) is a diagram showing a state in which the operation insulator is not subjected to seismic motion, and the operation insulator is in a vertical posture, and (b) is an operation insulator due to excessive seismic motion. It is a figure which shows the state which bent and bent. (A) is a perspective view which shows the intermediate | middle connection part 14, (b) is the disassembler view. (A) is a figure which shows the state which connected the intermediate connection part 14 to the insulator 12a, (b) is a figure explaining operation | movement of the intermediate connection part 14. FIG. It is a figure which shows an example of the disconnector by which the shock absorber of the disconnector which concerns on this invention is mounted. It is a schematic diagram which shows the relationship between an insulator apparatus and an impact buffering apparatus. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows suitable 1st embodiment of the shock absorber of the disconnector which concerns on this invention, (a) is a top view, (b) is an AA arrow front view in figure (a), (c). FIG. 5 is a partially broken cross-sectional view taken along the line BB in FIG. FIG. 8 is a partially enlarged view of FIG. It is a perspective view which shows suitable 1st embodiment of the shock absorber of the disconnector which concerns on this invention. It is a disassembled perspective view which shows suitable 1st embodiment of the shock absorber of the disconnector which concerns on this invention. It is a figure explaining operation | movement of suitable 1st embodiment of the shock absorber of the disconnector which concerns on this invention. It is a figure explaining suitable 2nd embodiment of the shock absorber of the disconnector which concerns on this invention. It is a figure explaining suitable 3rd embodiment of the shock absorber of the disconnector which concerns on this invention.

  FIG. 5 shows an example of the disconnector 1 installed in a 500 kV substation in which the shock absorber of the disconnector, which is a preferred first embodiment of the present invention, is mounted. FIG. 6 schematically shows the insulator device 4 on which the shock absorbing device 20 of the present invention is mounted. As can be seen by comparing FIG. 5 and FIG. 1, the basic configuration as the disconnecting switch is the same. Accordingly, corresponding members are denoted by the same reference numerals, and detailed description thereof is omitted. And it replaces with the conventional intermediate | middle connection part 14, and uses the impact buffering device 20 of this embodiment, It is characterized by the above-mentioned.

  In other words, when a new disconnector is newly installed, the shock absorber 20 of the present embodiment is interposed at the connection portion of the predetermined insulator 12a constituting the operation insulator 12, and the insulator 12a is respectively provided above and below the shock absorber 20. Are configured to be linked. Furthermore, it is possible to remove the intermediate connecting portion 14 and replace it with the shock absorbing device 20 for the disconnector in which the existing intermediate connecting portion 14 is mounted.

  As shown in the figure, in the present embodiment, three support insulators 11 are assembled in a triangular pyramid shape to form a tower, and the conductive portion 2 is supported at the top. Each of the support insulators 11 is formed as a single thin rod extending in a straight line by connecting a plurality of (four in this example) insulators 11a in series with bolts or the like. The three support insulators 11 are connected to each other by the inter-column connecting insulators 13 and are reinforced. The operation insulator 12 for transmitting the rotational force to the hinge portion 5 is arranged so as to extend vertically at the center of the triangular pyramid constituted by the three support insulators 11. Further, the operation insulator 12 is formed by connecting a plurality (four in this example) of insulators 12a in series. With this operation, the upper end of the insulator 12 is linked to the hinge portion 5. Further, the lower end of the operation wheel 12 is linked to an optional drive source. The operation wheel 12 is rotated by receiving power from the drive source, and the hinge portion 5 linked to the upper end of the operation wheel 12 is rotated accordingly.

  In the present embodiment, the shock absorber 20 is interposed between the second and third insulators 12a from the top, which is the middle point of the operation wheel 12, and the respective insulators are connected to the shock absorber 20. The first and second insulators 12a from the top, and the third and fourth insulators 12a from the top are connected by bolts or the like. As will be described later, the shock absorbing device 20 includes a universal joint, and the relative positional relationship between the upper surface and the lower surface can be inclined in an arbitrary direction from the parallel reference state. As a result, the second insulator 12a and the third insulator 12a from the top connected to the shock absorber 20 are oriented in the normal direction of the upper surface and the lower surface, respectively, so that the two insulators 12a when the shock absorber 20 is in the reference state. Are positioned on a straight line, but the angle formed by the axial direction of the two insulators 12a also changes along the relative inclination of the upper surface and the lower surface, and the two insulators 12a are displaced so as to intersect at a predetermined angle.

  Further, the upper end of the operation wheel 12 and the hinge portion 5 are linked by a pin joint 16. The lower end of the operation insulator 12 is linked to a thrust bearing 18 via a pin joint 17 and linked to a drive source (not shown) via this thrust bearing 18.

  The shock absorbing device 20 of this embodiment will be described with reference to FIGS. The shock absorbing device 20 of the present embodiment includes a universal joint 21 and a damper device 22 mounted in the universal joint 21. In the universal joint 21, the cross joint 25 is sandwiched between the upper coupling 26 and the lower coupling 27 and integrated using the pin 28. Both the upper coupling 26 and the lower coupling 27 are made of steel and have increased strength.

  As shown in FIG. 10 and the like, the upper coupling 26 is provided with recesses 26b at the four corners of the lower surface of the flat rectangular base plate 26a, and a cross-shaped joint support in the vicinity of the center of a pair of opposite sides of the lower surface of the base plate 26a. The part 26c is drooped. The thickness d1 (see FIG. 7B, etc.) of the base plate 26a in the portion where the recess 26b is formed is increased to maintain the strength. Furthermore, a through hole 26d is formed in the cross-shaped joint support portion 26c.

  Further, a substantially circular recess 26e is formed on the upper surface of the base plate 26a, and a rectangular elongated protrusion 26f is formed on the bottom surface of the recess 26e. The lower end of the insulator 12a of the operation wheel 12 is inserted into the recess 26e, and the protrusion 26f is engaged with the positioning recess formed on the bottom surface of the insulator 12a, thereby rotating the insulator 12a around its axis. The insulator 12a is set on the upper coupling 26 while being suppressed. The insulator 12a is fixed by bolts (not shown) penetrating through the plurality of through holes 26g provided in the bottom surface of the recess 26e.

  As shown in FIGS. 3 and 4, the upper coupling 14 b of the conventional intermediate connecting portion 14 has a positioning projection on a flat base plate. In this embodiment, the base plate 26 a is conventionally used. Thicker than the ones. The thickened portion was corrected by the depth of the recess 26e. In other words, the thickness is increased by the depth of the recess 26e. Thus, by making the base plate 26a thick, it is possible to set the thickness d1 of the portion of the base plate 26a where the concave portion 26b is provided to a thickness at which a desired strength can be obtained.

  The lower coupling 27 has recesses 27b at the four corners of the upper surface of a flat rectangular base plate 27a. The concave portion 27b is formed so as to face the concave portion 26b of the upper coupling 27 in the vertical direction. In addition, a cross-shaped joint support portion 27c is formed upright near the center of a pair of opposite sides of the upper surface of the base plate 27a. The formation position of the pair of cross-shaped joint support portions 27c is a position rotated 90 degrees with the formation position of the pair of cross-shaped joint support portions 26c of the upper coupling 27. Further, the thickness d2 (see FIG. 7B, etc.) of the base plate 26a in the portion where the bottom of the recess 27b is formed is increased to maintain the strength. Further, a through hole 27d is formed in the cross-shaped joint support portion 27c.

  Further, a substantially circular recess 27e is formed on the lower surface of the base plate 27a, and a rectangular elongated groove 27f is formed on the inner surface of the recess 27e. The upper end of the insulator 12a of the operation wheel 12 is inserted into the recess 27e, and the positioning protrusion formed on the upper surface of the insulator 12a is fitted into the groove 27f, whereby the rotation of the insulator 12a around the axis is performed. The insulator 12a is set on the lower coupling 26 while suppressing the above. The insulator 12a is fixed by bolts (not shown) penetrating through the plurality of through holes 27g provided so as to penetrate the base plate 27a at the positions where the recesses 27e are formed.

  Similar to the above-described upper coupling, the lower coupling 14c of the conventional intermediate connecting portion 14 has a positioning groove formed on a flat base plate. It was thicker than the conventional one. In other words, the thickness of the base plate 27a is increased by the depth of the recess 27e. The thickened portion was corrected by the depth of the recess 27e. By making the base plate 27a thick in this way, it is possible to set the thickness d2 of the base plate 27a at the portion where the recess 27b is provided to a thickness at which a desired strength can be obtained.

  As described above, the thickness of the base plates 26a, 27a of the upper coupling 26 and the lower coupling 27 is increased by a predetermined amount, and the amount increased from the thickness of the existing intermediate connecting portion 14 is increased to the depth of the recesses 26e, 27e. The distance between the upper surface of the upper coupling 26 (the bottom surface of the recess 26e) provided with the recesses 26e and 27e and the lower surface of the lower coupling 27 (the inner surface of the recess 27e) is The distance is equal to the distance between the upper surface of the upper coupling of the intermediate coupling portion 14 and the lower surface of the lower coupling 14c. Therefore, as described above, it is possible to remove the intermediate connecting portion 14 and replace it with the shock absorbing device 20 for the disconnector on which the existing intermediate connecting portion 14 is mounted.

  And the cross coupling 25 is inserted | pinched from the upper and lower sides using the side coupling 27 used as said upper side coupling 26. FIG. At this time, the pin mounting holes 25a formed in the side surface of the cross-shaped joint 25 at intervals of 90 degrees are aligned so as to face the through holes 26d and 27d of the corresponding cross-shaped joint support portions 26c and 27c, respectively. In this state, the pin 28 is inserted and fixed in the pin mounting hole 25a via the through holes 26d and 27d. Thereby, the upper coupling 26 and the lower coupling ring 27 can be relatively rotated around the axis of the pin 28 arranged in a straight line, and the universal joint 21 is configured.

  The damper device 22 is mounted in a recess 27 b provided in the lower coupling 27. Therefore, in the present embodiment, one damper device 22 is attached to each of the four corners of the lower coupling 27. The damper device 22 is fixed by fastening a fixing bolt 30 penetrated into a through hole 27h provided in the bottom surface of the recess 27b. When the bolt 30 is fastened, the lower coupling 27 and the damper device 22 are integrated. Further, the upper end of the damper device 22 can come into contact with the inner surface of the recess 26 b of the upper coupling 26. More specifically, for example, when the upper coupling 26 and the lower coupling 27 are in a parallel reference state, the upper surfaces of the four damper devices 22 are in contact with the corresponding four recesses 26b.

  In the present embodiment, the damper device 22 is configured by mounting a ring spring 33 in a storage container 31 having an upper opening and mounting a guide cap 32 having a lower opening so as to cover the top of the storage container 31. The guide cap 32 can move in the axial direction with respect to the storage container 31, that is, in the vertical direction in the installed state. The upper and lower ends of the ring spring 33 mounted in the storage container 31 are in contact with the guide cap 32 and the storage container 31, respectively. For example, when a downward biasing force is applied to the guide cap 32, the guide cap 32 biases the ring spring 33 downward, and moves downward while compressing and deforming the ring spring 33. When the urging force applied to the guide cap 32 is released, the guide cap 32 moves upward and returns to its original position by the elastic restoring force of the ring spring 33.

  As shown in an enlarged view in FIG. 8, the storage container 31 includes a shaft 35 disposed concentrically and a guide shaft 36 attached to the outside of the shaft 35. A base portion 35 a at the lower end of the shaft 35 comes into contact with the bottom surface of the recess 27 b of the lower coupling 27 and is fastened by a fixing bolt 30. In addition, the outer diameter of the base portion 35a and the outer diameter of the guide shaft 36 are made equal so that the outer peripheral side surface of the storage container 31 is substantially flush with the vertical direction. The outer diameter of the main body portion 35 b above the shaft 35 is made slightly smaller than the inner diameter of the inner ring 33 a of the ring spring 33.

  In addition, the inner diameter of the guide shaft 36 is made slightly larger than the outer diameter of the outer ring 33 b of the ring spring 33. A predetermined space is secured between the inner peripheral surface of the guide shaft 36 and the outer peripheral surface of the main body portion 35b of the shaft 35, and the ring spring 33 is inserted and set in the space. As a result, the shaft 35 penetrates into the ring spring 33.

  The upper end of the lower portion of the space formed between the shaft 35 and the guide shaft 36 is located on the upper surface of the base portion 35a and serves as a locking portion 35c. The lower end of the set ring spring 33 is in contact with and supported by the locking portion 35c.

  On the other hand, the guide cap 32 includes a cylindrical main body 38 that is open at the top and bottom, and a lid member 39 that is attached to the upper end of the main body. The inner peripheral surface of the main body 38 projects upward toward the center to form a locking portion 38a. The upper end of the ring spring 33 is in contact with the locking portion 38. Therefore, the upper and lower ends of the ring spring 33 are held in the storage container 31 and the guide cap 32 in a state of being in contact with both the locking portions 38a and 35c and being sandwiched between them.

  The lid member 39 has a curved surface on its upper surface 39a. Furthermore, the curved surface of the upper surface 39a is smoothed. Thereby, for example, when the upper coupling 26 is tilted in response to earthquake motion, the concave portion 26b of the upper coupling 26 and the upper surface 39a of the lid member 39 can be stably contacted regardless of the tilt angle. The contact range can be widened. As a result, the damper device is efficiently compressed, and a sufficient buffering effect and damping effect can be obtained.

  Furthermore, in this embodiment, an initial load loading structure for applying an initial load to the ring spring 33 is provided. The initial load applying structure is a structure in which an initial load is applied to the ring spring to perform initial compression in a reference state in which the upper coupling 26 and the lower coupling 27 are parallel. And in this embodiment, it was set as the structure which applies the initial load to the ring spring 33 inside the damper apparatus 22 by the stud bolt structure in the damper apparatus 22, and is initially compressed, and stabilizes the ring spring 33. FIG. Specifically, stud bolts provided with screws at both ends of the guide pin 40 are used. One end of the guide pin 40 is connected to the lid member 39. The guide pin 40 penetrates through the through hole 35e of the shaft 35, and the other end of the guide pin 40 protrudes into the internal space of the base portion 35a. A fastening nut 41 is attached to the other end of the guide pin 40, and the fastening nut 41 is attached. The tightening nut 41 contacts the top surface 35a '(the outer peripheral edge of the lower end of the through hole 35e) of the inner space of the base portion 35a of the shaft 35, and the tightening nut 41 is tightened by an appropriate amount in this state, whereby the guide cap 32 is secured. The initial load is applied to the ring spring 33 by moving downward.

  According to the shock absorber 20 of the disconnector of this embodiment, even when there is an earthquake motion or the like, it functions as follows, and the operation insulator 12 (the insulator 12a) can be prevented from being damaged. That is, since the shock absorbing device 20 includes the universal joint 21, when an earthquake motion is applied to the disconnector 1 and then to the insulator device 4, the operation insulator 12 performs an amplitude motion so that the insulator 12 is curved. The portion is appropriately displaced and the relative positional relationship / angle between the upper coupling 26 and the lower coupling 27 is changed, so that the insulator 12a is prevented from being excessively bent and broken. Furthermore, in this embodiment, since the damper device 22 including the ring spring 33 is provided, the operation device that performs an amplitude motion due to excessive earthquake motion appropriately follows the operation characteristics of the insulator 12, and the damper device 22 (the ring spring 33) is provided. The seismic performance is improved because the shock absorption and damping (disturbance suppression) function of the seismic function works. Furthermore, due to the high damping property of the ring spring 33, it is possible to suppress the amplification of the amplitude motion of the operation wheel, which occurs when the operation wheel 12 resonates. Therefore, by mounting the shock absorbing device 20 of the present embodiment, it is possible to sufficiently exhibit the earthquake resistance effect not only for the strength of the earthquake motion but also for a long-term earthquake.

  Furthermore, in this embodiment, since the initial load loading structure is incorporated in the damper device 22, the ring spring 33 can be initially compressed and stabilized inside the device. That is, when an earthquake motion is applied, the shock absorber 20 starts from the reference state in which the upper coupling 26 and the lower coupling 27 shown in FIG. 7 are parallel, and the upper coupling 26 is connected to the lower coupling 27 as shown in FIG. It is displaced in a state of being inclined relative to. Then, the guide cap 32 is biased downward and the ring spring 33 is compressed and deformed on the side (on the right side in FIG. 11) approaching the lower coupling 27 at the periphery of the upper coupling 26. At this time, due to the characteristics of the ring spring 33, the shock is absorbed and the vibration is attenuated. Then, the ring spring 33 is somewhat lost until it is compressed and reaches a region where the hysteresis of the ring spring is large, but the spring is stabilized and in this embodiment, the ring spring 33 is initially compressed by the initial load loading structure in advance. Therefore, from the beginning when the upper coupling 26 starts to tilt and the distance between the upper coupling 26 and the lower coupling 27 starts to shorten, there is no loss in the region where the hysteresis of the ring spring is large and the hysteresis characteristic is fully utilized. Can be used. Therefore, in this embodiment, a higher impact buffering effect and a damping effect can be exhibited.

  Since the upper coupling 26 and the lower coupling 27 are connected by the universal joint 21, the upper coupling 26 and the lower coupling 27 are inclined in an arbitrary direction depending on the direction of vibration. It will be in a state to be. Therefore, the shock absorbing device 20 always exhibits a shock absorbing and damping effect by the predetermined damper device 22 during vibration, suppresses the force applied to the operation insulator 12 and the insulator 12a, and contracts the amplitude of the operation insulator 12 at an early stage. can do.

  On the other hand, when the upper coupling 26 is inclined relative to the lower coupling 27, if there is a portion that approaches the lower coupling 27, the opposite side is separated from the lower coupling 27. Then, for example, as shown on the left side in FIG. 11A, the upper coupling 26 and the damper device 22 are separated from each other, and the biasing force from the upper coupling 26 to the damper device is released. However, in this embodiment, since the initial load loading structure is incorporated inside the stud bolt structure, the guide cap 32 does not rise beyond the distance defined by the guide pin 40. Therefore, even in the state shown in FIG. 11, the ring spring 33 is in a compressed state by a predetermined amount. Then, the upper coupling 26 that is displaced by vibration transitions to a state in which the upper coupling 26 returns to the horizontal after the state of FIG. 11 and the left side in the drawing is inclined downward. Therefore, in FIG. 11, when the left recess 26 b of the upper coupling 26 comes into contact with the upper surface of the damper device 22, the ring spring in the left damper device 22 has already been compressed by an appropriate amount due to the initial load. As described above, from the beginning when the upper coupling 26 starts to tilt and the ring spring in the damper device 22 starts to compress, it is used in a region where the spring is stable and there is no loss, and the hysteresis characteristic is fully utilized. Can do.

  FIG. 12 shows a main part of the second embodiment of the present invention. In this embodiment, as in the first embodiment described above, an initial load loading structure that applies an initial load to the damper device 22 is provided. However, in this embodiment, an initial load is applied to the damper device 22 from the outside.

  Specifically, the reinforcing plate 43 is attached to the upper surface of the base plate 26a where the recess 26b of the upper coupling 26 is formed. Then, the push bolt 41 is attached so as to penetrate the reinforcing plate 43 and the base plate 26a. The tip of the push bolt 41 is brought into contact with the upper surface of the guide cap 32 ′ of the damper device 22. Then, by adjusting the tightening amount of the push bolt 41 and setting the tip position of the push bolt 41 to an appropriate position, an appropriate initial load is applied to the ring spring 33 for initial compression.

  The guide cap 32 'includes a cylindrical main body 38' and a lid member 39 'that closes an upper portion of the main body 38'. The upper end of the ring spring 33 is received by the lower surface of the lid member 39 '.

  Further, the reinforcing plate 42 is attached to the lower surface of the base plate 27a where the concave portion 27b of the lower coupling 27 is formed. The fixing bolt 30 passes through the reinforcing plate 42 and the base plate 27 and is connected to the storage container 31 of the damper device 22. Also in this embodiment, since the initial load is applied to the damper device 22 from the outside using the push bolt 41, a large reaction force is applied to the upper coupling 26 and the lower coupling 27 that support the damper device 22. Therefore, the reinforcing plates 43 and 42 are connected to reinforce the upper coupling 26 and the lower coupling 27, and sufficient strength is secured to withstand the reaction force. In this embodiment, sufficient strength is obtained by attaching the reinforcing plates 43 and 42. However, as in the above-described embodiment, the wall thickness itself of the upper coupling 26 and the lower coupling 27 is increased. May be.

  According to the present embodiment, as in the above-described embodiment, the four damper devices 22 with which the upper coupling 26 (push bolt 41) contacts when the upper coupling 26 and the lower coupling 27 are in the parallel reference state. Even if the upper coupling 26 is tilted in the direction due to the seismic motion, the initial load is applied, so even if the upper coupling 26 is tilted in the direction due to the earthquake motion, it should be operated without loss from the region where the hysteresis characteristics are sufficiently utilized Can do.

  However, because of the initial load application structure that applies a load from the outside, for example, when the upper coupling 26 is once inclined and the upper coupling 26 and the damper device 22 are separated (on the right side in FIG. 12C), the initial load is canceled. As a result, it becomes 0, which causes some loss until reaching the region where the hysteresis of the ring spring is large. Therefore, it can be said that the first embodiment in which the initial load loading structure is adopted inside is more preferable.

  In the present embodiment, the shape of the top portion of the lid member 39 ′ has a large curvature of the curved surface, but it is more preferable that the curved surface is a gentle curved surface as in the first embodiment. In addition, since another structure and an effect are the same as that of 1st embodiment mentioned above, the same code | symbol is attached | subjected to a corresponding member and the detailed description is abbreviate | omitted.

  FIG. 13 shows a third embodiment of the present invention. In this embodiment, the initial load loading structure is not adopted as in the above-described embodiments, and it can be said that the structure is simple. Since the initial load is not applied, it is not necessary to increase the strength of the upper coupling 26 and the lower coupling 27 as compared with the two embodiments. Therefore, the thickness of the base plates 26a and 27a corresponding to the recesses 26b and 27b is as follows. It is thin and has no reinforcing plate. Thereby, weight reduction of the shock absorbing device 20 can be achieved.

  In the present embodiment, the liner 44 is inserted between the bottom surface of the recess 27 b of the lower coupling 27 and the damper device 22 to raise the damper device 22, and the upper end of the damper device 22 and the upper coupling 26 are The gap has been eliminated. Thereby, the damper device 22 is stably held. In this embodiment, since an initial load is not applied, a loss occurs until the use state in the region where the hysteresis of the ring spring is large and the region where the hysteresis characteristic is fully utilized, the first embodiment and the second embodiment. Compared to the form, the impact buffering effect and the damping effect are reduced, but compared to the conventional universal joint alone, the impact can be absorbed and the vibration can be attenuated, and the operation of the insulator 12 and the insulator 12a can be prevented from being damaged. Can do. In addition, since another structure and an effect are the same as that of each embodiment mentioned above, the same code | symbol is attached | subjected to a corresponding member and the detailed description is abbreviate | omitted.

[Modification]
In each of the embodiments described above, four damper devices are arranged. However, the number of installed damper devices is not limited to four, and various numbers can be used. For example, it is preferable to arrange eight at 45 degree intervals, because the shock absorbing effect and the damping effect can be more appropriately and effectively exhibited regardless of the direction of the inclination of the upper coupling 26. However, in that case, for example, considering the embodiment described above, for example, four damper devices are arranged outside the pin joint 25 and the pin 28 connecting the couplings 26 and 27. The entire device becomes large. Further, for example, it is preferable to dispose the damper device at the apex of the equilateral triangle because the upper coupling 26 and the lower coupling 27 are supported at three points, so that the stability is good. However, assuming the configuration of the existing intermediate connecting portion 14, the assumed triangle becomes large, and the entire apparatus becomes large. In view of these matters, it is preferable that the number is four as in the above-described embodiments.

In each embodiment described above, a ring spring is used as the damper device, but the present invention is not limited to this, for example, a disc spring may be used instead of the ring spring, other various spring members, A member having an impact absorbing function and / or a damping function other than the spring member may be used. For example, it is preferable to use rubber or the like because it has a high-performance shock absorption and damping function. However, the durability of rubber is inferior to that of a spring member. Therefore, for example, when considering the installation environment of the disconnector, it is preferable to use a spring member in order to obtain maintenance-free that does not require replacement over a long period of time. Further, among the spring members, the ring spring shown in the embodiment is the best in view of shock absorption and damping function. On the other hand, since the ring spring is expensive, it is preferable to use an inexpensive spring such as a disc spring when the demand for shock absorption and damping is low.
The universal joint is not limited to one using a cross-shaped joint, and various types such as one using a ball can be used.

  The application location of the shock absorbing device according to the present invention is not limited to those of the above-described embodiments and modifications, and can be applied to locations having various insulator connecting portions such as support insulators.

DESCRIPTION OF SYMBOLS 1 Disconnector 20 Impact buffer device 21 Universal joint 22 Damper device 25 Cross-shaped joint 26 Upper coupling 27 Lower coupling 28 Pin 31 Storage container 32 Guide cap 33 Ring spring 35 Shaft 36 Guide shaft 38 Main body 39 Cover member 40 Guide pin 41 push bolt

Claims (7)

It is an impact shock absorber interposed between insulators adjacent to the top and bottom of the disconnector,
A universal joint that makes the angle between the insulator connected to the upper side and the insulator connected to the lower side variable,
A damper device arranged to be interposed between an upper connecting member connected to the upper insulator of the universal joint and a lower connecting member connected to the lower insulator;
The shock absorber for a disconnector, wherein the damper device absorbs an impact generated based on an operation in which a distance between the upper connecting member and the lower connecting member is shortened.   2. The shock absorber for a disconnect switch according to claim 1, wherein the insulator constitutes an operation insulator that transmits a rotational force for opening and closing the disconnect switch.   The shock absorber of the disconnector according to claim 1, wherein the damper device is configured using a spring member.   The impact buffering device for a disconnect switch according to claim 3, wherein the spring member is a ring spring.   The shock absorber for a disconnector according to claim 4, further comprising an initial load loading structure for applying an initial load to the ring spring. The damper device includes a storage container having an upper opening that stores the ring spring, and a guide cap that is disposed on the upper part of the storage container so as to be movable up and down.
The initial load loading structure is mounted inside the damper device, and has cooperation means for linking the storage container and the guide cap so as to limit a maximum separation distance between the storage container and the guide cap, 6. The shock absorber of the disconnector according to claim 5, wherein the ring spring is compressed even when the storage container and the guide cap are located at the maximum separation distance. The damper device includes a storage container having an upper opening that stores the ring spring, and a guide cap that is disposed on the upper part of the storage container so as to be movable up and down.
6. The initial load loading structure according to claim 5, wherein the guide cap is urged downward from the outside of the damper device so that the ring spring is compressed in an unloaded normal state. Disconnector shock absorber.

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