CN109786168B

CN109786168B - Isolating switch

Info

Publication number: CN109786168B
Application number: CN201811146572.5A
Authority: CN
Inventors: 大山友幸; 高桥徹夫; 永田清志
Original assignee: Takaoka Toko Co Ltd
Current assignee: Takaoka Toko Co Ltd
Priority date: 2017-11-14
Filing date: 2018-09-29
Publication date: 2023-02-17
Anticipated expiration: 2038-09-29
Also published as: CN109786168A; JP2019091601A; JP6916717B2

Abstract

The invention provides a vibration suppression device, wherein even under the condition of large earthquake motion, damage of an insulator device and a double-arm telescopic conductive part with large moment is prevented. The method comprises the following steps: a conductive part (2) having a telescopic double arm; an insulator device (4) for supporting the conductive section; and three adjusting stud assemblies (15) for adjusting the height direction positions of the insulator device, wherein the top ends of the three adjusting stud assemblies are mounted on an adjusting plate (12), and the adjusting plate (12) is connected to the bottom end of the supporting insulator through a vibration suppression device (25). The vibration suppressing device has a structure in which a circlip-type damper device (27) is installed in a top side coupling (31) and a bottom side coupling (30) that constitute a hinge joint. An initial load is applied to the ring spring (43) by being clamped by means of two coupling. In a relatively small earthquake, the ring spring does not expand and contract, and can exhibit the shock-absorbing function of adjusting the stud bolt assembly or the like, and in a relatively large earthquake, the ring spring exhibits the shock-absorbing function accompanying expansion and contraction of the ring spring.

Description

Isolating switch

Technical Field

The present invention relates to an isolator, and more particularly, to a double-arm telescopic isolator or a single-arm telescopic isolator having a vibration suppression function.

Background

Fig. 1 shows an example of a conventional double-arm telescopic disconnector 1'. The double-arm telescopic disconnecting switch 1' has a structure in which a double-arm telescopic conductive part 2 is provided on the top of an insulator device 4 standing on a stand 3 provided on the ground. The conductive section 2 is constituted by a link mechanism in which a plurality of arms 5 are connected by a pin structure 6. In the illustrated example, the top end of the bottom-side 1 st arm 5a is rotatably connected to the bottom end of the top-side 1 st arm 5b by a pin structure 6, the top end of the bottom-side 2 nd arm 5c is rotatably connected to the bottom end of the top-side 2 nd arm 5d by the pin structure 6, and the intermediate portion of the top-side 1 st arm 5b and the intermediate portion of the top-side 2 nd arm 5d are rotatably connected by the pin structure 6. Further, lower portions of the bottom-side 1 st arm 5a and the bottom-side 2 nd arm 5c are arranged along the side surface 14a of the power transmission case 14, and the bottom ends of the bottom-side 1 st arm 5a and the bottom end of the bottom-side 2 nd arm 5c are connected to the output shaft 14b of the power transmission case 14, respectively. When the output shaft 14b rotates in the forward and reverse directions, the tip end 2a (tip end of the first arm 5b and the second arm 5 d) of the conductive section 2 moves up and down by the operation of the link mechanism. When the tip of the top-side 1 st arm 5b and the tip of the top-side 2 nd arm 5d constituting the tip 2a of the conductive part 2 are located at upper positions as shown in the figure, the fixed contact part 7a of the bus bar 7 is brought into contact with each other in a state of being sandwiched from both sides, and conduction is achieved. When the tip 2a is located at the lower position, although not shown, the tip of the top side 1 st arm 5b and the tip of the top side 2 nd arm 5b as the pair of tips 2a are in an open state, and are separated from the fixed contact portion 7a to be in a non-conductive state.

The insulator device 4 includes three supporting insulators 10 for supporting the conductive portion 2 and an operating insulator 11, and the operating insulator 11 transmits a rotational force for opening and closing the conductive portion 2 of the link mechanism. Three support insulators 10 are respectively provided on each side of a triangular pyramid having an adjusting plate 12 as a bottom side, the adjusting plate 12 being provided on the top surface of the bracket 3 via an adjusting stud assembly 15, and the top ends of the support insulators 10 being connected to a power transmission case 14. In each support insulator 10, a plurality of insulators 10a are connected in series, and the connecting portions are firmly connected by, for example, bolts, nuts, or the like. Thereby, each support insulator 10 behaves like a single rod. In addition, in the operating insulator 11, a plurality of insulators 11a are connected in series, and the operating insulator 11 stands on the bracket 3. The connection between the insulators 11a is firmly implemented by, for example, bolt fastening. Thereby, the insulator 11 is operated like one rod.

The operating insulator 11 is rotatably supported at its distal end by the shaft support 9 via a bearing, and its distal end is connected to a power transmission case 14 provided on the top surface side of the shaft support 9. The rotation of the operation insulator 11 standing in the vertical direction around the axis is converted into a predetermined rotation around the horizontal axis, that is, a rotation in the vertical plane, by a transmission mechanism attached to the inside of the power transmission case 14. An output shaft 14b of the transmission mechanism is provided on one side surface 14a of the power transmission case 14. The base ends of the arms 5 constituting the conductive part 2 are provided and connected to the output shaft 14b. Accordingly, if the operation insulator 11 is rotated in the forward and reverse directions, the output shaft 14b is rotated in the forward and reverse directions, and the lowermost arm 5 is rotated in the forward and reverse directions around the bottom end of the arm 5 as a rotation center in accordance with this operation. The front end 2a of the conductive portion 2 is lifted and lowered as described above by the operation of the link mechanism accompanying the forward and reverse rotation of the lowermost arm 5.

As shown in an enlarged manner in fig. 2, in the adjusting stud bolt assembly 15, a screw 17 having external threads at both ends is provided so as to penetrate the adjusting plate 12 and the top plate 13 of the bracket 3, and the adjusting plate 12 and the top plate 13 are respectively clamped from above and below by a plurality of nuts 18 attached to both ends of the screw 17 to be fixed. By appropriately positioning the nut 18 with respect to the screw 17, the adjustment plate 12 is positioned at a desired height while being kept horizontal. The adjusting stud bolt assembly 15 is of a rigid structure in which the top plate 13 and the adjusting plate 12 are directly connected by a screw 17 and a nut 18, and are firmly fixed without being moved.

The conventional double arm telescopic type disconnecting switch 1' has a structure in which the adjusting stud assembly 15 and the insulator device 4 are both fixed. In addition, for example, in the case where an earthquake motion occurs, the conductive part 2 tends to move in the direction of swinging in accordance with the motion, but the movement of the conductive part 2 is suppressed by suppressing displacement of the top portion by adjusting the stud bolt assembly 15 and the supporting insulator 10 of the insulator device 4 of the triangular pyramid reinforcing structure. However, when a large earthquake motion exceeding the design reference waveform of the insulator device 4 occurs, for example, a large flexural stress is applied near the top of the insulator device 4, and if the flexural allowable stress exceeds the stress of the insulator, there is a risk that the insulator will be broken. In order to prevent breakage of the insulator against the earthquake motion, for example, a shock absorber for a disconnecting switch disclosed in patent document 1 has been developed, and the shock absorber is provided at a connecting portion of the insulators connected in series.

Documents of the prior art

Patent document

Patent document 1: JP 2014-120276 publication

Disclosure of Invention

Problems to be solved by the invention

The conventional technology for preventing the earthquake of the disconnector has been developed specifically for the purpose of preventing the damage of the insulating portion. Therefore, in the double-arm telescopic type isolation switch which is the object of the present invention, for example, a sufficient anti-seismic structure cannot be adopted for a large earthquake motion which is relatively larger than a scale assumed in the past. That is, in the case of the double arm telescopic type disconnecting switch, as shown in fig. 1 in particular, if the arm 5 is in an extended posture in the conductive part 2 in the connected state, and in this state, a large shock such as an earthquake exceeding the conventional design standard of the insulator device is generated, a large moment is generated, and the conductive part 2 and the insulator device 4 are damaged. In particular, a break occurs in the portion of the pin structure 6 near the tip of the support insulator 10. The conventional anti-seismic technology cannot be suitably applied to the double-arm telescopic disconnecting switch 1'.

Means for solving the problems

In order to solve the above problem, the invention according to claim (1) relates to a disconnecting switch comprising: a double-arm telescopic or single-arm telescopic conductive part; a support insulator supporting the conductive portion; a bracket supporting the support insulator; and a plurality of adjusting stud bolt assemblies provided between the support insulator and the bracket to adjust a height direction position of the support insulator, wherein a vibration suppressing device is provided between the adjusting stud bolt assemblies and an adjusting plate holding the support insulator, the vibration suppressing device includes a hinge joint member mounted at a plurality of locations inside the hinge joint member, and a damper device, the hinge joint member is configured such that an oldham ring is interposed between a bottom side coupling and a top side coupling, the bottom side coupling and the top side coupling are disposed to face each other at a predetermined interval in the vertical direction, the oldham ring is connected to the bottom side coupling and the top side coupling via pins, respectively, and is displaceable in a reference state in which the top side coupling and the bottom side coupling are parallel to each other and in a state in which the damper device is inclined relative to each other, and the damper device has a ring spring built-in therein, and the ring spring contracts in a state in which the damper device is interposed between the bottom side coupling and the top side coupling in the reference state, and applies an initial load.

The telescopic double-arm conductive part is in a posture of extending vertically in a connected state, for example, and if a shock such as an earthquake occurs in this state, a large moment is generated. In the present invention, for example, vibration at the time of occurrence of an earthquake can be damped by the damper device, and the conductive portion can be suppressed from being largely displaced. Therefore, even when there is a large earthquake motion, the vibration is damped by the expansion and contraction of the ring spring, so that the vibration of the support insulator and the conductive portion can be suppressed to a small degree, and the conductive portion and the support insulator can be prevented from being damaged or largely displaced and coming into contact with a nearby member. In particular, since the articulated joint member connecting the top-side coupling and the bottom-side coupling via the oldham ring is provided, the top-side coupling can be inclined with respect to the bottom-side coupling regardless of the direction of the horizontal vibration of the seismic motion, and the damping device provided on the side with a narrow gap can function to damp the vibration. In addition, since the inclination is displacement occurring centering on the portion of the hinge joint (cross joint), the swing can be further reduced. Since the hinge joint is a pin joint, even when the hinge joint is inclined, the hinge joint is smoothly displaced without a gap, and the reliability is maintained for a long period of time.

Scheme (2): the structure is as follows: the ring spring exhibits a shock-absorbing function associated with expansion and contraction of the ring spring in response to a relatively small earthquake, while the adjusting stud bolt assembly and the support insulator exhibit a shock-absorbing function associated with expansion and contraction of the ring spring in response to a relatively large earthquake that cannot be accommodated by the adjusting stud bolt assembly and the support insulator. The reason for this is that: in the case of a small earthquake, the initial load is increased by utilizing the inherent shock-proof function of the adjusting stud bolt assembly and the supporting insulator, and the vibration and the swing caused by the shock-absorbing function of the ring spring are large, so that the shock-absorbing device can still cope with the relatively large vibration. Further, if the degree of expansion of the ring spring is slightly exceeded by the range that cannot be dealt with by adjusting the anti-seismic function of the stud bolt assembly or the like, for example, the expansion and contraction of the ring spring are small, and the inclination of the support insulator and the conductive portion 2 and the displacement amount of the overhead portion can be reduced. Therefore, the inclination and the displacement can be suppressed to a small extent in a wide range of the magnitude of the vibration.

Scheme (3): the adjusting stud bolt assembly is provided with three adjusting stud bolt assemblies so as to be positioned at the apex of an imaginary triangle, and the damping means is provided between adjacent ones of the mounting positions of the three positions of the adjusting stud bolt assembly of the lower side coupling one at a time. If constructed in this manner, the shock absorbing device can be installed in the hinge joint with good efficiency. In addition, by adopting this configuration, the shock absorbing devices are also disposed at the vertices of the imaginary triangle in total three one at a time. Thus, regardless of the direction of the horizontal vibration of the seismic motion, at least one of the vibration dampers functions to damp the vibration, and the vibration can be effectively damped with a simple structure having a small number of components.

Scheme (4): the damping device is fixed to the lower side coupling and is in non-fixed contact with the upper side coupling. If the structure is such that the damping means is stabilized and held in the inside of the hinge joint, and if the top side joint and the damping means are not fixed in a contact state, the top side joint and the damping means are allowed to move relatively, so that the top side joint is smoothly inclined in association with a large earthquake or the like, and the anti-seismic function can be exerted. In the present embodiment, the fixation is performed using bolts.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, damage to the conductive portion and the support insulator can be suppressed even in the case of a large earthquake motion, for example.

Drawings

FIG. 1 is a diagram showing a conventional example;

FIG. 2 is a diagram showing a conventional example;

fig. 3 is a front view showing one form of the vibration suppressing device of the double-arm telescopic type disconnecting switch according to the present invention;

fig. 4 (a) is a plan view showing a portion of the adjustment plate, fig. 4 (b) is a view showing the adjustment stud bolt assembly, the vibration suppressing device, and the periphery thereof, and fig. 4 (c) is a cross-sectional view showing the damper device;

fig. 5 (a) is a view showing the stud bolt assembly, the vibration suppressing device and the periphery thereof, fig. 5 (B) is a partial sectional view taken along the line a-a, and fig. 5 (c) is a partial sectional view taken along the line B-B;

FIG. 6 (a) is a view showing the stud bolt assembly, the vibration suppressing device and the periphery thereof, FIG. 6 (b) is a plan view showing the hinge joint, and FIG. 6 (c) is a front view showing the hinge joint;

fig. 7 is a schematic view of the hinge joint, which is a view illustrating a setting method of applying an initial load to the ring spring 43 of the shock-absorbing device 27;

FIG. 8 is a diagram for explaining the effect;

fig. 9 is a view showing an example of a single arm telescopic type disconnecting switch;

fig. 10 is a view showing another example of a single arm extension type disconnector;

fig. 11 is a view showing another example of a single arm extension type disconnector;

fig. 12 is a view showing a main part of a single arm telescopic type disconnecting switch.

Detailed Description

An embodiment of the present invention will be specifically described below with reference to the drawings. The present invention is not limited to the above-described embodiments, and various changes, modifications, and improvements can be made to the present invention based on the knowledge of those skilled in the art without departing from the scope of the present invention.

Fig. 3 shows a preferred embodiment of the vibration suppression device of the present invention and one mode of a double-arm telescopic disconnector 1 to which the vibration suppression device is applied. The double-arm telescopic disconnecting switch 1 has the same configuration as the conventional type described with reference to fig. 1 and 2, and the same reference numerals are used to describe corresponding parts. Fig. 3 is a view corresponding to fig. 1 (b), and the view corresponding to fig. 1 (a) is omitted, and the basic configuration of the two-arm telescopic disconnecting switch 1 is the same as that of fig. 1 (a). As shown in fig. 3, the two-arm telescopic disconnecting switch 1 includes: a double-arm telescopic conductive section (2), the conductive section (2) being moved toward/away from a bus bar; an insulator device 4, the insulator device 4 supporting the conductive part 2; a stand 3, the stand 3 being disposed on the ground; and an adjusting stud bolt assembly 15, wherein the adjusting stud bolt assembly 15 is arranged between the bracket 3 and the insulator device 4 to adjust the height position and posture of the insulator device 4.

The conductive section 2 has basically the same structure as a conventional double arm telescopic type disconnecting switch. The conductive section 2 is constituted by a link mechanism in which a plurality of arms 5 are connected by a pin structure 6. The tip 2a of the conductive part 2 moves up and down by the operation of the link mechanism. As shown in the figure, when the arm 5 is extended and the tip 2a thereof is located at the upper position, the pair of tips 2a are brought into contact with each other in a state of sandwiching the fixed contact portion 7a of the bus bar 7 provided at the upper position, and conduction is achieved. When the arms 5 are folded and the tips 2a thereof are positioned at the lower positions, the pair of tips 2a are opened and separated from the fixed contact portions 7a to be nonconductive, although illustration thereof is omitted.

The lower part of the arm 5 is electrically connected to another bus bar, and the other bus bar is electrically connected to the bus bar 7 at the current supply position shown in the figure, although this is not shown in the figure. Further, if the tip 2a of the conductive portion 2 is located at a lower position and is separated from the bus bar 7, a line leading to the bus bar, which is not shown, is blocked from the bus bar 7.

The insulator device 4 is basically the same in structure as the conventional two-arm extension-type disconnecting switch. Namely, the insulator device 4 includes: three supporting insulators 10, the supporting insulators 10 supporting the conductive portion 2; an operating insulator 11, and the operating insulator 11 transmits torque for opening and closing the conductive portion 2 of the link mechanism. Three support insulators 10 are respectively provided on each side of a triangular pyramid having an adjusting plate 12 as a bottom side, the adjusting plate 12 being provided on the top surface of the bracket 3 via an adjusting stud assembly 15, and the top ends of the support insulators 10 being connected to a power transmission case 14. In each support insulator 10, a plurality of insulators 10a are connected in series, and the connecting portion is firmly implemented by, for example, a bolt, a nut, or the like. Thereby, each support insulator 10 behaves like a single rod. As shown in fig. 5, the adjustment plate 12 is formed of a flat plate of a substantially equilateral triangle whose vertices are chamfered, and the bottom ends of the three support insulators 10 are connected to the vicinities of the vertices of the substantially equilateral triangle, respectively.

Further, in the operating insulator 11, a plurality of insulators 11a are connected in series, and the operating insulator 11 stands on the stand 3. The connection between the insulators 11a is firmly performed by, for example, bolt fastening. Thereby, the operating insulator 11 behaves like a single rod. The operating insulator 11 has a distal end rotatably supported by the shaft support portion 9 via a bearing, and a distal end connected to a power transmission case 14, the power transmission case 14 being provided on the top surface side of the shaft support portion 9 (see fig. 1 a).

The rotation of the vertically erected operating insulator 11 around the shaft is converted into rotation around the shaft by a transmission mechanism provided inside the power transmission case 14, through an output shaft 14b that projects horizontally from the side surface 14a to the outside. Thus, if the operation insulator 11 is rotated in the forward and reverse directions, the output shaft 14b is rotated in the forward and reverse directions, and the posture of the arm 5 is changed.

An operator 20 is provided below the outer side surface of the holder 3. The operator 20 includes: a drive source such as a battery or a drive motor; an operation switch for controlling driving, and the like. The rotational output of the drive source is transmitted to the operating insulator 11 via the power transmission mechanism 21. The operation insulator 11 receives the rotation output and performs forward and reverse rotation.

These basic structures are the same as those of the general two-arm telescopic disconnector 1'. In the present embodiment, the vibration suppressing means is provided between the adjusting stud bolt assembly 15 and the adjusting plate 12, and the adjusting stud bolt assembly 15 is provided vertically on the top plate 13. That is, in the conventional double-arm expansion disconnector, the top ends of three adjusting stud bolt assemblies 15 provided upright so as to be located at the inner portion (the middle side of the adjusting plate 12) of the connecting portion of the supporting insulator 10 of the adjusting plate 12 are connected to the adjusting plate 12 at the inner portion, but in the present embodiment, the top end side of the adjusting stud bolt assembly 15 is connected to the adjusting plate 12 via the vibration suppressing device 25.

As shown in an enlarged manner in the figures following fig. 4, the vibration damping device 25 comprises a hinge joint 26 and a damping device 27, the damping device 27 being mounted inside the hinge joint 26. In the hinge joint 26, an oldham coupling 28 is interposed between a lower coupling 30 and an upper coupling 31 which are disposed to face each other at a predetermined interval from the upper and lower sides, and predetermined positions of the oldham coupling 28 are integrally connected to the lower coupling 30 and the upper coupling 31 by pins 29.

In the lower coupling 30, a pair of oldham couplings support portions 30c are provided at predetermined positions on the top surface of the disc-shaped base plate 30a so as to face each other. The cross joint support portion 30c is a standing flat plate and includes a through hole 30d penetrating through the flat plate in the thickness direction. The pair of oldham coupling support portions 30c is formed in such a manner that: one surface of the flat plate faces, and the through holes 30d are located on a straight line and are located at positions equally spaced apart from the center of the substrate 30a. Further, at a predetermined position on the bottom surface of the bottom side coupling 30, a predetermined region is projected upward at an interval of 60 degrees, thereby forming a recess 30e. A through hole penetrating vertically is formed in the recess 30e. A fixing nut 32 is attached to the inside of the recess 30e in which the through hole is opened. The center of the internal thread of the fixing nut 32 coincides with the center of the through hole 30 f. Further, the tip of the adjusting stud bolt 15 is inserted into the through hole, and the external thread formed on the outer peripheral surface of the adjusting stud bolt 15 is engaged with the internal thread of the fixing nut 32.

That is, the through hole 13a formed in the top plate 13 of the bracket 3 and the through hole 30f formed in the recess 30e of the lower coupling 30 are provided so as to be aligned in the vertical direction, and the screw 17 is provided so as to penetrate the two through

holes

13a and 30 f. These through holes 13a have an inner diameter larger than the outer diameter of the screw 17, and are in a so-called free-dimension hole state. The screw 17 of the present embodiment is externally threaded over the entire length. A set of bottom fixing nuts 22 is attached to the screw 17 at the male screw portion on the side attached to the top plate 13 of the holder 3, and the top plate 13 is held from above and below by the set of bottom fixing nuts 22. Thereby, the screw 17 is fixed to the top plate 13, and the screw 17 is held so as to stand in the vertical direction. On the other hand, the screw 17 is attached to the fixing nut 32 provided in the bottom coupling 30 at the tip end side of the male screw portion, and the tip end thereof is positioned inside the through hole 30 f. The lower coupling 30 is maintained in a horizontal state while being firmly integrated with the top plate 13 of the bracket 4 by properly adjusting the relative positions of the screw 17 and the fixing nut 32 and the relative positions of the screw 17 and the lower fixing nut 22.

The top coupling 31 has a disk-shaped base plate 31a, similar to the bottom coupling 30. The outer diameter of the base plate 31a is equal to the outer diameter of the base plate 30a of the bottom side coupling 30. A pair of cross support portions 31c are provided to face each other at predetermined positions on the bottom surface of the base plate 31a. The cross joint support portion 31c is a flat plate that hangs down, and includes a through hole 31d that penetrates the flat plate in the thickness direction. The pair of oldham joint support portions 31c is formed in such a manner that: one surface of the flat plate faces, and the through holes 31d are located on a straight line at positions equally spaced apart from the center of the substrate 31a. In addition, the distance between the one set of the cross joint support portions 30c is equal to the distance between the one set of the cross joint support portions 31c. When the bottom coupling 30 and the top coupling 31 are combined, the centers of the centers vertically coincide with each other, and a line connecting the pair of oldham coupling support portions 30c of the bottom coupling 30 and a line connecting the pair of oldham coupling support portions 31c of the top coupling 31 are provided so as to be orthogonal to each other. In this installed state, the through-hole 30d formed in the pair of cruciform joint support portions 30c and the through-hole 31d formed in the pair of cruciform joint support portions 31c are positioned on the same plane.

The oldham coupling 28 is sandwiched by the top coupling 31 and the bottom coupling 30 from above and below so that the oldham coupling 28 is provided in a space surrounded by the pair of oldham

coupling support portions

30c and 31c. At this time, the pin attachment holes 28a formed at 90-degree intervals on the side surfaces of the cross 28 are aligned so as to face the through

holes

30d, 31d of the corresponding

cross support portions

30c, 31c, respectively. In this state, the pin 29 is inserted through the through

holes

30d and 31d and fixed to the inside of the pin attachment hole 28 a. The top coupling 31 and the bottom coupling 30 are thus relatively rotatable about the axis of the pin 29 in a straight line, constituting the articulated joint 26.

The top-side coupling 31 is connected to the adjustment plate 12 by the fixing bolt 23 attached from the top surface side of the adjustment plate 12 in a state where the base plate 31a is in contact with the bottom surface of the adjustment plate 12, and is integrated with the adjustment plate 12. Then, the base plate 31a of the upper joint 31 is parallel to the adjustment plate 12, and the base plate 30a of the lower joint 30 is also parallel to the top plate 13 of the bracket 3 as described above. In the hinge joint 26, for example, in a state of a basic posture in which the base plate 30a of the bottom-side coupling 30 is parallel to the base plate 31a of the top-side coupling 31, the base plate 31a of the top-side coupling 31 may be displaced so as to be inclined in an arbitrary direction with respect to the center position of the base plate 30a of the bottom-side coupling 30. Then, for example, in a state where the hinge joint 26 is in the basic posture, the insulator device 4 connected to the adjustment plate 12 is erected so as to extend vertically above the bracket 3, and the adjustment plate 12 and thus the insulator device 4 are angularly displaceable together with the top coupling 31 of the hinge joint 26.

Further, in the present embodiment, the damper device 27 is provided so as to be sandwiched in the space between the bottom-side coupling 30 and the top-side coupling 31 of the hinge joint 26. The damper devices 27 are disposed one at a time between adjacent recesses 30e, the recesses 30e being disposed on the base plate 30a of the bottom joint 30, and a total of three damper devices 27 are disposed. The damper device 27 is mounted on the base plate 30a of the lower joint 30. The fixing of the damper device 27 is performed by: the fixing bolts 24 passing through the inside of the through holes provided in the base plate 30a are fastened. By fastening the bolts 24, the lower joint 30 and the damper device 27 are integrated. In addition, the top end of the damper device 27 may be in contact with the bottom surface of the base plate 31a of the top joint 31. More specifically, for example, in a reference state where the top side coupling 31 is parallel to the bottom side coupling 30, the top surfaces of the three damper devices 27 are in contact with the base plate 30a, respectively. The three damper devices 27 are of the same type having the same outer dimensions and the same characteristics, and their specific configurations are as follows.

As shown in fig. 4 (c) and the like, the damper device 27 is configured in such a manner that: a ring spring 43 is installed inside the receiving container 41 opened at the top, and a guide cover 42 opened at the bottom in such a manner as to cover the upper side of the receiving container 41 is installed. The guide cover 42 is movable in the axial direction, i.e., in the set state, in the up-down direction with respect to the receiving container 41. The receiving container 41 includes a column portion 41b and a peripheral wall 41c, the column portion 41b projecting upward from the middle of the disk-shaped bottom portion 41a, and the peripheral wall 41c extending upward from the outer peripheral edge of the bottom portion 41 a. The column portion 41b and the peripheral wall 41c are provided concentrically, and a predetermined space is formed between the outer peripheral surface of the column portion 41b and the inner peripheral surface of the peripheral wall 41 c. This space constitutes a receiving portion for the ring spring 43.

The inner diameter of the inner ring 43a of the ring spring 43 is set to be one turn larger than the outer diameter of the column portion 41b, and the outer diameter of the outer ring 43b of the ring spring 43 is set to be one turn smaller than the inner diameter of the peripheral wall 41 c. The length of the ring spring 43 in the axial direction is set to be larger than the height of the column portion 41 b. Thus, in a state where the ring spring 43 is inserted into the space between the outer peripheral surface of the column portion 41b and the inner peripheral surface of the peripheral wall 41c, the lower end portion of the ring spring 43 contacts the bottom portion 41a of the receiving container 41, and the upper end portion of the ring spring 43 protrudes above the column portion 41 b.

The guide cover 42 includes a cylindrical guide shaft 42a having an upper and lower opening, and a cover portion 42b closing an upper portion of the guide shaft 42a, and an outer diameter of the guide shaft 42a is equal to an outer diameter of the cover portion 42 b. The cover 42b and the guide shaft 42a are fastened by a fixing bolt 42c in a state where the tip of the guide shaft 42a is in contact with the peripheral edge of the bottom surface of the cover 42 b. The inner diameter of the guide shaft 42a is substantially equal to the outer diameter of the inner wall 41c of the receiving container 41. In a state where the upper portion of the receiving container 41 is covered with the guide cover 42, the lower portion of the inner peripheral surface of the guide shaft 42a faces the upper portion of the outer peripheral surface of the peripheral wall 41c in a state of being engaged with each other, and both are relatively movable in the axial direction. The top surface of the cover portion 42b is a flat surface.

Then, in this attached state, the tip end of the ring spring 43 contacts the lid portion 42b of the guide lid 42. Then, for example, if a downward biasing force is applied to the guide cover 42, the guide cover 42 biases the ring spring 43 downward, and the ring spring 43 is lowered while being compressively deformed. Further, if the biasing force acting on the guide cover 42 is released, the guide cover 42 moves upward by the elastic restoring force of the ring spring 43 and returns to the original position.

In the present embodiment, the damper device 27 is sandwiched from above and below by the bottom-side coupling 30 and the top-side coupling 31, and thereby an initial load is applied to the ring spring 43 in the damper device 27. That is, the length of the damper device 27 (the distance between the bottom surface of the bottom portion 41a of the receiving container 41 and the top surface of the cover portion 42b of the guide cover 42) when the ring spring 43 is in the unloaded state is set to be larger than the distance between the top-side coupling 31 and the bottom-side coupling 30 in the reference state. Then, in order to install the damper device 27 between the top coupling 31 and the bottom coupling 30 in the reference state, it is necessary to require the length of the damper device 27 to be equal to the distance between the top coupling 31 and the bottom coupling 30, the damper device 27 is sandwiched by the top coupling 31 and the bottom coupling 30, the ring spring 43 is compressively deformed, and the initial load is applied.

As a setting method for installing the damper device 27 so as to be sandwiched between the upper joint 31 and the lower joint 30 and applying an initial load to the damper device 27, for example, the processing of fig. 7 may be performed. That is, as shown in fig. 7 (a), the damper 27 is inserted into one of the mounting portions of the damper 27 at three portions of the hinge joint 26. At this time, the one portion side of the top side coupling 31 is inclined so as to be lifted upward, and the space above and below the one portion is enlarged. Thus, the damper device 27 can be easily set at a predetermined position between the upper joint 31 and the lower joint 30 (see fig. 7 (b)).

Next, as shown in fig. 7 (c), the

respective base plates

31a and 30a are pressed by a predetermined jig so as to sandwich the portions of the facing upper joint 31 and lower joint 30 at the positions where the damper devices 27 are provided and to bring the portions closer to each other. Thus, the portions of the

substrates

31a and 30a pressed by the pressing operation approach each other, and the

substrates

31a and 30a on the opposite side to the portions pressed by the pressing operation are separated from each other with respect to the reference state. Next, a jig is used to press the

substrates

31a and 30a into predetermined positions until the distance between the opened

substrates

31a and 30a is greater than the axial length in the unloaded state. In this state, the remaining two damper devices 27 are disposed at predetermined positions on the opened side.

After the two damper devices 27 are installed, if the jig is removed (see fig. 7 d), the ring spring 43 in the first damper device 27, which is compressed and deformed by the jig, is expanded by the elastic restoring force, and the gap between the

base plates

31a and 30a of the top joint 31 and the bottom joint 30, which the first damper device 27 comes into contact with, is expanded. As a result, as shown in fig. 7 (e), the

base plates

31a and 30a of the top coupling 31 and the bottom coupling 30 are in a parallel reference state, and the guide cover 42 and the receiving container 41 are pressed against the three sandwiched damper devices 27, respectively, so that the inner ring spring 43 is compressively deformed, and an initial load is applied to the ring spring 43. In this reference state, the bottom surface of the top coupling 31 and the top surface of the cover portion 42b of the guide cover 42 are in surface contact with each other and firmly clamped. In the present embodiment, since the three damper devices 27 are of the same type, the initial loads acting on the ring spring 43 of the respective damper devices 27 are equal. In addition, by appropriately setting the characteristics, performance, or dimension and shape of the damper device 27 of the ring spring 43, an initial load, for example, 8 tons is applied as an initial load generated in the reference state. Further, at an appropriate timing, the bolts 24 attached from the bottom side of the base plate 30a of the bottom side joint 30 are tightened to fix the bottom side joint 30 and the damper device 27.

In the double-arm telescopic disconnecting switch 1 having the vibration suppressing device 25 of the present embodiment, the loads of the adjustment plate 12 and the insulator device 4 provided thereon are received by the hinge joint 26. More specifically, by portions of the cross 28, pin 29 of the hinged joint 26. That is, the adjustment plate 12 is integrally formed by being brought into surface contact with the base plate 31a of the top coupling 31 of the hinge joint 26 and fastened by the fixing bolt 23. On the other hand, the top end of the adjusting stud member 15 fixed directly in such a manner as to extend over the top surface of the top plate 13 of the bracket 3 is connected directly to the base plate 30a of the bottom coupling 30 of the hinge joint 26. Then, the lower coupling 30 of the articulated joint member 26 is mechanically connected to and supported by the bracket 3 via the adjusting stud members 15, and the insulator device 4 and the like are mechanically connected to the lower coupling 30 via the oldham coupling 28 from the base plate 31a of the upper coupling 31 of the articulated joint member 26. Thereby, the insulator device 4 and the like are mechanically connected to the jack post assembly 15 and further to the bracket 3 via the hinge joint 26, and the load of the insulator device 4 and the like is received by the cross joint 28 of the hinge joint 26. In addition, the hinge joint 26 can be held from above and below with respect to the ring springs 43 in the three shock absorbing devices 27, and an initial load of, for example, 8 tons can be applied, and the strength and rigidity of the connecting portion of the cross joint 28 are also high. For these reasons, the load is mechanically supported securely at the hinge joint 26 and thus at the cross joint 28.

Further, since the initial load of the ring spring 43 is set to a large value such as 8 tons, the ring spring 43 does not expand and contract and maintains the initial state even in a normal case where there is no sway such as an earthquake or the like, and even in a case where there is an earthquake with a small sway. Then, since the stud bolt assembly 15 is adjusted and adjusted as described above and the bottom coupling 30 of the hinge joint 26 is fixed so as to maintain the horizontal state, the insulator device 4 is supported in the initial state where the bottom coupling 30 and the top coupling 31 are parallel to each other in the state where the center line thereof stands in the vertical direction.

In addition, for example, in the case of an earthquake with a small swing, the ring spring 43 does not expand or contract. Thus, in the hinge joint 26, the bottom side coupling 30 and the top side coupling 31 are maintained in a parallel reference state, and the hinge joint 26 is formed as a block to connect the insulator device 4 of the top side to the stud bolt assembly 15 connected to the top plate 13 of the bracket 3 integrally. In the state where the ring spring 43 is not expanded, the same function as that of the conventional double-arm expansion type disconnector 1' is exhibited, and damage is suppressed. For example, in the case of earthquake motion, the conductive part 2 moves in the sway direction together with the earthquake motion, but by adjusting the pantograph 15, the hinge joint 26 integrally formed therewith, and the insulator device 4 of the triangular pyramid reinforcement structure, displacement of the ceiling portion is suppressed, and movement of the conductive part 2 is suppressed.

On the other hand, as shown in fig. 8 (a), in the conventional structure in which the distal end portion of the adjustment stud bolt assembly 15 is directly connected to the adjustment plate 12 of the supporting insulator device 4, the rigidity from the bracket 3 to the adjustment plate 12 is high, and the natural period of the double-arm telescopic conductive section 2 is also different. Accordingly, in the case where the horizontal vibration accompanying the small earthquake motion occurs, the conductive part 2 or the insulator device 4 is damaged by suppressing the displacement of the ceiling portion and suppressing the movement of the conductive part 2 as described above, and in the case where a large earthquake exceeding the horizontal vibration that can be suppressed occurs, the displacement of the ceiling portion cannot be suppressed and the conductive part 2 also moves. At this time, the insulator device 4 and the conductive portion 2 above it do not swing together in the portion from the bracket 3 to the adjustment plate 2. In particular, when the conductive part 2 is in the closed state, the arm 5 extends upward, so that the swinging moment of the conductive part 2 accompanying the horizontal vibration is also large, and the displacement amount of the ceiling part is large. As a result, the conductive portion 2 and the insulator device 4 are damaged.

In contrast, in the present embodiment, the hinge joint 26 is provided between the top end of the adjuster stud bolt assembly 15 and the adjuster plate 12, and the hinge joint 26 has the ring spring 43 that applies an initial load by sandwiching the damper device 27 between the top-side coupling 31 and the bottom-side coupling 30, so that even when the bifilar expansion disconnector 1 swings, for example, due to a large earthquake or the like, vibration can be damped by the ring spring 43.

That is, as shown in fig. 8 (b) and 8 (c), when horizontal vibration is generated in association with a large earthquake motion exceeding the allowable level due to the swing of the arm 5 constituting the conductive section 2 of the double-arm telescopic isolator 1' provided with the conventional damper device 27, the ring spring 43 receiving a large load associated with the vibration is elastically deformed and expanded. In this case, the hinged joint 26 allows the swing, the top side coupling 31 is inclined in a predetermined direction, and the adjustment plate 12 and, therefore, the insulator device 4 are displaced in an inclined manner. Then, when the ring spring 43 is restored by the oscillation, the damper function is exerted, and the conductive portion 2 can be suppressed from being largely displaced. Therefore, even when there is a large earthquake motion, the conductive part 2 can be prevented from swinging, and the conductive part 2 and the insulator device 4 can be prevented from being damaged or largely displaced and coming into contact with a nearby member.

In addition, in the present embodiment, the articulated joint 26 having the oldham joint 28 is used, so that it can move in any direction (the upper side coupling 31 is inclined with respect to the lower side coupling 30), and the variability accompanying earthquakes is good. Further, since the cross joint 28 is connected to the cross

joint support portions

30c and 31c by the pins 29, no friction and no play are generated in the pin portions, and displacement can be smoothly generated.

Also, the portion of the cross 28 of the hinge joint 26 is inclined as a center. In contrast to this, for example, when the cross joint 28 is not provided and the ring spring to which an initial load is applied by a certain mechanism is located at three positions and used for the portable device of the present embodiment, the ring spring is inclined with the position of the compressed ring spring as the center, and therefore, the ring spring becomes large. In the present embodiment, since the cross joint 28 is inclined with respect to the center, the inclination may be small. The distance traveled also becomes shorter. In particular, since the insulator device 4 is high, a slight difference in slope at the bottom side greatly affects the moving distance of the apex portion. In this embodiment, since the inclination and the moving distance of the bottom side of the insulating structure can be suppressed to a small value, the moving distance of the vertex portion is also small, and the contact portion can be suppressed from coming off and breaking as much as possible.

In the present embodiment, since the damper devices 27 are provided at the vertices of the virtual triangle, the ring spring 43 of at least one damper device 27 is compressively deformed and damped regardless of the direction of the horizontal vibration of the seismic motion.

In the above-described embodiments, the example of the double arm telescopic type disconnecting switch has been described, but the present invention is not limited to this, and is also applicable to, for example, a single arm telescopic type disconnecting switch. Fig. 9 shows an example of a single arm telescopic type disconnecting switch. The single arm telescopic type disconnecting switch has a structure in which a single arm telescopic type conductive part 2 is provided on the top of an insulator device 4 standing on a stand 3 provided on the ground. The conductive part 2 is configured such that the tip end of the lower conductive rod 5a 'is rotatably connected to the base end of the upper conductive rod 5b' by the pin structure 6, and the tip end 2a of the conductive part 2 is lifted. The conductive part 2 is attached to a plate 16 via a power transmission mechanism 14'. According to the pin structure 6, the movement of the lower conductive rod 5a 'is interlocked with the movement of the upper conductive rod 5 b'. As shown in fig. 9 (a), if the lower conductor bar 5a 'is erected from a state in which the lower conductor bar 5a' and the upper conductor bar 5b 'are laid down in a substantially horizontal direction, the upper conductor bar 5b' is also erected in conjunction with this (see fig. 9 (b)). Next, if the lower conductive rod 5a 'is tilted from the standing state, the upper conductive rod 5b' is also tilted in conjunction with the tilting, and the state shown in fig. 9 (a) is returned. Next, as shown in fig. 9 (a), when the distal end portion 2a is located at the lowered position, the distal end portion 2a is separated from the fixed contact portion 7a of the bus bar 7, and is non-conductive and in the opened state. As shown in fig. 9 (b), when the distal end portion 2a is located at the raised position, the distal end portion 2a comes into contact with the fixed contact portion 7a of the bus bar 7, and is electrically conducted and in the on state.

The insulator device 4 includes: a support insulator 10 for supporting the conductive part 2; and an operating insulator 11, wherein the operating insulator 11 transmits an operating force for lifting and lowering the distal end portion 2a of the conductive portion 2. The support insulator 10 connects a plurality of insulators 10a in series. Similarly, in the operating insulator 11, a plurality of insulators 11a are connected in series. The corresponding connection is realized firmly by means of e.g. bolts, nuts. These supporting insulators 10 and operating insulators 11 stand upright on the stand 3. The top end of the support insulator 10 is connected to the plate 16 to support the conductive part 2. Further, the top end of the operating insulator 11 is connected to the power transmission mechanism 14'. When the operating insulator 11 is rotated in the forward and reverse directions by receiving power from the operating device 20, the power is transmitted to the lower conductor bar 5a ' via the power transmission mechanism 14', and the lower conductor bar 5a ' stands or falls. Thereby, the tip end portion 2a of the conductive portion 2 is lifted and lowered, and the on state and the off state of the disconnector are switched.

Fig. 10 and 11 show another type of single arm telescopic disconnecting switch. As shown in fig. 9, the single arm telescopic type disconnecting switch is of a type in which the tip end portion 2a of the single arm telescopic type conductive section 2 is lifted and lowered to be brought into contact with and separated from the fixed contact portion 7a provided above, and in the disconnecting switch shown in fig. 10 and 11, the tip end portion 2a of the single arm telescopic type conductive section 2 is reciprocated in the horizontal direction to be brought into contact with and separated from the fixed contact portion 7a provided adjacent to the fixed contact portion in the horizontal direction. Even in the case of this type, the reciprocating movement of the tip end portion 2a is performed by: the displacement is caused by the forward and reverse rotation of the insulator 11 to a state where the lower conductor bar 5a ' stands as shown in fig. 10, and a state where the lower conductor bar 5a ' tilts as shown in fig. 11, and the upper conductor bar 5b ' also operates in the same manner in accordance with the displacement. In this type, the fixed contact portion 7a is also supported by the support insulator 10.

These single arm extension type disconnectors are attached via an adjustment stud assembly 15 as shown in an enlarged manner in fig. 12 when the insulator device 4 (support insulator 4) is supported by the bracket 3. Fig. 12 is an enlarged view of a portion a in fig. 9 to 11. That is, as shown in fig. 12 (a), conventionally, a structure has been adopted in which the top end of the adjustment stud bolt assembly 15 is directly connected to the adjustment plate 12 to which the bottom end of the support insulator 4 is attached. In contrast, in the present embodiment, as shown in fig. 12 (b), the vibration suppression device 25 is provided between the distal end of the adjusting stud bolt assembly 15 and the adjusting plate 12. In addition, the top end of the adjustment stud member 15 is directly connected to the lower coupling 30 of the hinge joint 26 constituting the vibration suppressing means 25, and firmly connects the adjustment plate 12 to the upper coupling 31. Accordingly, the support insulator 4 is maintained in a standing state by adjusting the function of the stud bolt assembly 15 with respect to a relatively small vibration, thereby suppressing damage to the insulator device 4 and the conductive portion 2, and the vibration of the support insulator is rapidly reduced by the damping effect of the ring spring 43 of the vibration suppression device 25 with respect to a relatively large vibration, thereby suppressing damage to the insulator device 4 and the conductive portion 2.

Description of the reference symbols:

reference numeral 1 denotes a two-arm telescopic disconnecting switch;

reference numeral 2 denotes a conductive portion;

reference numeral 3 denotes a holder;

reference numeral 4 denotes an insulator device;

reference numeral 12 denotes an adjusting plate;

reference numeral 13 denotes a top plate;

reference numeral 15 denotes an adjusting stud assembly;

reference numeral 25 denotes a vibration suppressing device;

reference numeral 26 denotes a hinge joint;

reference numeral 27 denotes a damper;

reference numeral 28 denotes a cross joint;

reference numeral 29 denotes a pin;

reference numeral 30 denotes a bottom side coupling;

reference numeral 31 denotes a top side coupling;

reference numeral 43 denotes a ring spring.

Claims

1. A disconnector, comprising: a double-arm telescopic or single-arm telescopic conductive part; a support insulator supporting the conductive portion; a bracket supporting the support insulator; a plurality of adjustment stud assemblies, this adjustment stud assembly sets up between this supporting insulator and above-mentioned support, adjusts the position of the direction of height of above-mentioned supporting insulator, its characterized in that:

a vibration suppressing means is provided between the adjusting stud assembly and an adjusting plate to which the supporting insulator is fixed,

the vibration suppressing device includes a hinge joint and a damping device installed at a plurality of positions inside the hinge joint,

the hinge joint part has the following structure: the cross joint is clamped between the bottom side coupling and the top side coupling, the bottom side coupling and the top side coupling are oppositely arranged at a predetermined interval, and the cross joint is respectively connected with the bottom side coupling and the top side coupling through pins, and can generate displacement in a reference state that the top side coupling is parallel to the bottom side coupling and a relative inclined state,

a ring spring is arranged in the damping device,

in a state where the damper device is sandwiched by the bottom-side coupling and the top-side coupling in the reference state, the ring spring contracts and applies an initial load.

2. The isolating switch of claim 1, wherein said ring spring does not expand and contract to provide anti-seismic functionality for said adjusting stud assembly and said support insulator in the event of a minor earthquake;

the shock absorbing function according to the expansion and contraction of the ring spring is exerted against a large earthquake which cannot be handled by the adjusting stud bolt assembly and the support insulator.

3. A disconnector according to claim 1 or 2, characterized in that three of said adjusting stud assemblies are arranged in such a way that they are located at the vertices of an imaginary triangle;

the damper device is provided one at a time between adjacent mounting positions of the three mounting positions of the adjusting stud bolt assembly of the lower side joint.

4. A disconnector according to claim 1 or 2, characterized in that said damping means are fixed to said bottom side coupling and are non-fixedly in contact with said top side coupling.

5. A disconnector according to claim 3, characterized in that the damping means are fixed to the bottom side coupling and are in non-fixed contact with the top side coupling.