JPH05266765A - Switchgear - Google Patents

Abstract

PURPOSE:To simplify a driving force transmission system to a linking mechanism, improve safety, and also reduce the dimension in an arranging direction of a switchgear main body in an switchgear having a Scott-Russell type linking mechanism. CONSTITUTION:Mechanism boxes 2 containing linking mechanisms for performing the switching action of movable and fixed contacts are arranged in the direction orthogonal to the arranging direction of a switchgear main body 1, and each of driving rotary shafts 20, 21, and 22, provided among the adjoining linking mechanisms, are linked each other, via the linking mechanisms in the mechanism boxes 2, to form one shaft coaxially, and also to be linked to the linking mechanisms. Each of the driving rotary shafts is turned by an operation device 3 to perform the switching action. Consequently since only driving rotary shafts exist each between the switchgear main bodies, a driving mechanism is simplified while improving safety and reducing the dimension among the switchgear main bodies.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switchgear used in a gas-insulated switchgear such as a substation or a power generation main circuit switchgear such as a power plant, and a switchgear such as a grounding device.

[0002]

2. Description of the Prior Art FIGS.
It is a top view, a front view, and an internal structure sectional view of the conventional switchgear shown in Japanese Patent Publication No. 09130 and Japanese Utility Model Publication No. 63-5387. In FIG. 8 and FIG. 9, 1 is each switchgear body consisting of a grounded metal container, 2 is a mechanism box arranged on the left side surface of each switchgear body 1 in the arrangement direction, and 3 is a left end switchgear body. An operation device, 4 is provided on the operation device, and a rotating operation lever is provided on the operation device. 5 is an operation for pivoting one end of the operation lever 4 to the operation lever 4 and the other end to the drive lever 6 for up and down operation. The other ends of the rods 6 are fixed to the drive rotary shaft 10 protruding from the mechanism box 2 in the left end phase in the direction perpendicular to the arrangement direction, and the drive levers 7A, 7B and 7C that rotate are fixed to the drive rotary shafts 10. The connecting levers 8 and 9 which are rotated are connected to the connecting levers 7A, 7B and 7C, and the connecting rod 10 is connected to the link mechanism in each mechanism box 2 and one end thereof is connected to the link mechanism. Insert it into the shaft end that protrudes in the direction perpendicular to the arrangement direction, and Lever -7A, 7B, 7C
Are drive shafts that are fixed to each other.

In FIG. 8, the distance X between the central axis of the switchgear body and the end face of the mechanism box 7, the distance Y between the end face of the mechanism box 2 and the outer surface of the switchgear body 1 adjacent to it, and between the switchgear body The distance Z is shown. Here, the distance Y is an arrangement allowance between the mechanism box 2 and the adjacent switchgear body 1 and is necessary in order to secure a space for maintenance and inspection of the mechanism box 2 and its surroundings. And the above distance X
Is an essential distance in the arrangement direction in the above configuration, and the distance Z is inevitably determined as the sum of the distance X, the distance Y, and the radius of the switchgear body 1.

In FIG. 10, reference numeral 11 is a conductor, which is disposed substantially coaxially inside the switchgear body 1 for conducting a current, and 12 is a fixed contactor supported by the conductor 11.
Reference numeral 3 denotes a movable contactor which is linearly moved in the axial direction of the movable contactor 13 and opens and closes with the fixed contactor 12 by a Scott-Russell type link mechanism (hereinafter referred to as a link mechanism) configured inside the mechanism box 2, 15, one end of which is pivotally attached to the end of the movable contact 13 and the other end of which is fitted with a pin 14,
A link which is pivotally attached to the drive lever 16 at the center, and 16 is pivotally attached to the center of the link 15 and the other end is the drive rotary shaft 10
A drive lever 17, fixed to the guide 15, is a guide for fitting and vertically sliding the pin 14 fitted to the upper end of the link 15, and a guide 18 for the movable contact 13 in the mechanism box 2. This movable contactor 1 is provided in the portion to be penetrated.
A sleeve made of a material such as Teflon which is guided and supported in the axial direction of 3 in the form of a ring, 19 is a flexible connecting conductor which connects the end of the movable contact 13 and the mechanism box 2. is there.

The conventional switchgear is constructed as described above,
The driving force of the operating device 3 is rotatably transmitted to the operating lever-4 and converted into vertical movement of the operating rod 5. Then, it is transmitted as a rotational force of the drive lever 6 to the drive rotating shaft 10 protruding from the mechanism box 2 provided in the left end opening / closing device body in the direction perpendicular to the arrangement direction. Further, this turning power is the driving rotary shaft 10 described above.
A connecting lever 7A fixed to the shaft converts the axial movement of the connecting rod 8 into the central drive rotary shaft 10 via the connecting lever 7B, similarly to the connecting rod 9 and connecting lever.
The rotation is transmitted to the drive rotary shaft 10 at the right end via 7C.

Thus, the drive rotary shaft 1 of each opening / closing device.
The driving force transmitted to 0 causes the movable contact 13 to come into contact with and separate from the movable contact 13 by the link mechanism incorporated in the mechanism box 2. This contact / separation operation is performed as follows.
The turning force transmitted to each drive rotary shaft 10 is transmitted to the link 15 via the drive lever 16 fixed to the drive rotary shaft 10. The above-mentioned link 15 by this turning power
The pin 14 fitted on the upper part of the pin 17 fits in the groove of the guide 17 and slides up and down while swinging around the pin 14, so that the pin 18 is forcibly guided by the sleeve 18.
4, the fixed contact 12 fixed to the conductor 11 by linearly moving in the axial direction of the movable contact 13 in the direction perpendicular to the sliding direction.
Open and close with. For example, when the movable contactor is turned on to make it conductive with the conductor 11, an electric current flows through the mechanism box 2 through the connection conductor 19 and is grounded via the switchgear main body 1 to open / close the grounding device.

[0007]

Since the conventional opening / closing device is constructed as described above, the swinging connecting lever and the connecting rod operating in the arrangement direction are provided between the opening / closing device main bodies. The structure became complicated and much time was spent on the assembly work. Further, in the case of a fast-acting type switchgear having current switching performance, these connecting levers and connecting rods that are exposed to the outside are instantaneously driven with a large force, so even from the viewpoint of occupational safety during maintenance and inspection. There was a problem of being dangerous. Further, it is impossible to significantly reduce the distance Z between the switchgear bodies, and in view of this distance Z, the switchgear is downsized, and thereby the effective use of the power station / substation space and economic efficiency are reduced. There is also a problem that it cannot fully respond to social needs such as improvement.

The present invention has been made to solve the above problems, and simplifies the drive transmission system to the link mechanism that causes the movable contactor to contact and separate, and swings between the switchgear bodies. It is an object of the present invention to provide a switchgear having improved safety by eliminating levers and rods that move in the axial direction and having a reduced dimension in the arrangement direction.

[0009]

In the opening / closing device according to the present invention, a mechanism box accommodating the link mechanism is arranged in the opening / closing device main body in a direction perpendicular to the arrangement direction of the opening / closing device main body and adjacent to each other. A drive rotary shaft is provided between the link mechanisms, and the shaft ends of the drive rotary shafts are connected to each other in the mechanism box and also connected to the link mechanism.

Further, in the opening / closing device, the drive rotation shafts are arranged so that their shaft ends face each other in the mechanism box and are connected to each other through a link mechanism, and the drive rotation between the link mechanisms is performed. The shafts are arranged so as to form one shaft substantially coaxially as a whole.

[0011]

As described above, the levers that swing between the switchgear bodies and the rods that move in the arrangement direction are eliminated, which reduces the risk during maintenance and inspection and simplifies the drive transmission system. In addition, the space between the switchgear bodies becomes smaller,
The size in the array direction is reduced.

[0012]

【Example】

Example 1. 1 to 5 are views showing an embodiment of the present invention, in which 1-4, 11-15 and 17-19 are the same as or equivalent to the above-mentioned conventional device. 1 and 2 are a plan view and a front view of a switchgear according to the present invention. In the figure, each opening / closing device main body 1 is provided with a mechanism box 2 containing a Scott-Russell type link mechanism on the same side in the direction perpendicular to the arrangement direction. An operation rod 5A is pivotally attached to one end of the operation lever 4 and the other end is pivotally attached to the drive lever 6A to move up and down. A drive rotating shaft 20 protruding from the mechanism box 2 provided in the apparatus main body 1 in parallel with the arrangement direction.
The drive levers 20, which are fixed to and transmit the rotation, are fitted from the left side surface of the mechanism box 2 provided in the switchgear body 1 at the left end, and are transmitted to the link mechanism incorporated in the mechanism box 2. The drive rotation shafts 21, 21 for providing the drive rotation shafts 20 and 22 are provided between the adjacent link mechanisms.
Is a drive rotary shaft for transmitting a drive force to the link mechanism arranged in the central and right end opening / closing devices in cooperation with the drive rotary shaft 20.

3 to 5 are cross-sectional views showing the internal structures of the mechanism box 2 and the switchgear body 1 in each switchgear, and FIG. 4 shows the mechanical box 2 at the left end and the center.
Similarly, FIG. 5 is an internal structure view seen from an arrow VV with respect to the mechanism box 2 at the right end, and in FIG. 5, 16A is each drive rotary shaft 20, 2 described above.
1, 22 fit through the left side wall of each of the mechanism boxes 2,
An input lever fixed to the shaft end in the mechanism box 2,
16B, one end of each of the drive rotary shafts 21 and 22 is fitted into the left end and the right side wall of the central mechanism box 2 so as to face the shaft end portions of the drive rotary shafts 20 and 21 substantially coaxially. One end of the output lever 23 fixed to the input lever 16A symmetrically with the input lever 16A is fixed to the input lever 16A and is inserted between the input lever 16A and the output lever 16B. The center end of the link 15 of the link mechanism is fitted and the other end is fitted to the output lever 16B to connect the shaft ends of the drive rotary shafts 20, 21, 22 facing each other, and the link 15 It is a connecting pin that also connects with. Contrary to the above, the connecting pin 23 is fixed to the output lever 16B and fitted to the input lever 16A to obtain the same function. In the mechanism box 2 at the right end, since the adjacent mechanism box 2 does not exist, the connecting pin 23 fixed to the input lever 16A is connected to the link 15
It is just fitted in the center of and connected.

In the opening / closing device configured as described above, the operating device 3 attached to the opening / closing device body 1 at the left end.
Driving force of the operating rod 5A as the turning force of the operating lever-4.
Is transmitted to and converted to vertical movement. This vertical movement is transmitted to the drive rotary shaft 20 as a rotational force via the drive lever 6A. At this time, in the mechanism box 2 at the left end, it is transmitted to the drive rotary shaft 21 via the input lever 16A, the output lever 16B, and the connecting pin 23. Similarly, this turning power is applied to the input lever 16 in the mechanism box 2 in the center.
It is transmitted to the drive rotary shaft 22 at the right end through A, the output lever 16B, and the connecting pin 23.

Thus, the drive rotary shafts 20, 21, 2 are
The rotative power transmitted to 2 is rotationally transmitted to the link lever 15 through the input lever 16A, the output lever 16B, and the connection pin 23 that is inserted through the central portion of the link 15, and is connected to the lower end portion. An attempt is made to swing the movable contact 13 around the pin 14 pivotally attached to the upper end, but the movable contact 13 is forcibly guided by the sleeve 18 to move in the axial direction of the movable contact 13. It makes a linear movement to open and close with the fixed contact 12. As a result, the pin 14 is fitted in the groove portion of the guide 17 and slides vertically in the direction perpendicular to the axial direction of the movable contact 13 to absorb the vertical stroke due to the swing.

Incidentally, in FIG. 1, dimensions X, Y and Z having the same reference numerals as those in the conventional example are shown. Since there is no need for special maintenance / inspection at the distance Z between the switchgear bodies,
The distance Y between the outer surfaces of the opening / closing device body is merely a margin for arrangement, and is smaller than the distance Y between the end surface of the mechanism box 2 and the outer surface of the opening / closing device body 1 in the conventional example. Further, unlike the conventional example, there is no mechanism box between the switchgear body 1 as in the conventional example, and thus the distance Z is significantly reduced as compared with the conventional example, and the overall size of the switchgear is also significantly reduced. Further, unlike the conventional example, only the drive rotation shafts 21 and 22 exist between the switchgear body 1, so that the structure is extremely simplified and the assembling workability is improved, and the safety is improved because only the rotating operation is performed.

Embodiment 2. Example 1 above. In the above, the case where the link mechanism is on the drive rotary shafts 20, 21, 22 is substantially coaxial is shown.
When the drive rotation shafts 20, 21, 22 are not coaxial with each other due to a gap error or the like in the switchgear body 1, as shown in FIG. Projected drive rotation shafts 21A, 21C
And 22A, 22C are provided with shaft couplings 23 for axial difference absorption such as flexible couplings using universal joints (universal joints) and coil springs, respectively, and connecting rotary shafts 21B, 22B, which are connected to each other to transmit the rotation to each of the link mechanisms. It is possible to expect the effect of smoother driving and easier assembly.

Also, depending on the equipment installation conditions, the switchgear bodies 1 must be installed in a state in which the arrangement of the switchgear bodies 1 is stepped in the front-rear direction and in the height direction.
Even if 0, 21, and 22 cannot be arranged coaxially, the drive rotary shafts 21A, 21C and 22A, 2 are similarly to the above.
Universal joints (universal joints) are arranged at the shaft ends of 2C, and the rotary shafts 21B and 22B are connected between them.
Since they can be connected to each other and transmitted to each of the link mechanisms in rotation, they are not affected by the constraint conditions such as the equipment installation space and the equipment installation base.

In the case of having such a step, even if the shaft center is changed by using a bevel gear or the like in the connection box without using the connecting means as described above, the connection is similar to the above. The effect of can be expected.

Example 3. In the first and second embodiments, the case of the grounding device has been described. However, as shown in FIG. 7, the mechanism box 2 of each opening / closing device is arranged above the opening / closing device main body 1 or at a lower part (not shown). Then, the link mechanism configured inside the mechanism box 2 causes the movable contact 25 to move in the axial direction of the movable contact 25 through the insulating operation rod 24 so as to open and close with the fixed contact 26 and a disconnector or a disconnector. The same effect as in the above embodiment can be expected.

By the way, in the above description, the case of using for a grounding device, a disconnector, a circuit breaker, etc. was described, but not limited to the case of a gas insulated switchgear using SF6 gas etc. as another insulating medium, the The same effect can be expected in the case of an air-insulated switchgear that has an internal opening / closing mechanism and uses air as an insulating medium.

[0022]

Since the present invention is constructed as described above, it has the following effects.

A mechanism box accommodating a link mechanism is arranged on the same side in the direction perpendicular to the arrangement direction of the switchgear body, and drive rotary shafts provided between adjacent link mechanisms are connected to each other in the mechanism box. Since the uniaxial shaft is formed substantially coaxially with the arrangement direction and is connected to the link mechanism, there are levers that rotate between the switchgear bodies and rods that swing in the arrangement direction. Since it is unnecessary and only the above-described drive rotary shaft which rotates unlike the conventional example exists, the structure is extremely simplified and the assembly workability is improved, which is economically advantageous and the risk during maintenance and inspection is reduced.

Further, as described above, since the space for arranging the mechanism box and the space for maintenance and inspection are not required between the switchgear bodies, the distance between the body parts can be shortened and the switchgear as a whole can be downsized.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of the present invention.

FIG. 2 is a front view showing the first embodiment of the present invention.

FIG. 3 is a sectional view showing details of the internal structure of Embodiment 1 of the present invention.

FIG. 4 is a sectional view of the internal structure of the opening and closing device at the left end and the center as seen from the arrow IVIV of the first embodiment of the present invention.

FIG. 5 is a sectional view of the internal structure of the right end opening / closing device as seen from the arrow VV of the first embodiment of the present invention.

FIG. 6 is a front view showing a second embodiment of the present invention.

FIG. 7 is a front view showing a third embodiment of the present invention.

FIG. 8 is a plan view showing a conventional opening / closing device.

FIG. 9 is a front view showing a conventional opening / closing device.

FIG. 10 is a cross-sectional view showing details of the internal structure of a conventional opening / closing device.

[Explanation of symbols]

 1 Switchgear main body 2 Mechanism box 3 Operating device 12 Fixed contactor 13 Movable contactor 20,21,22 Drive rotating shaft

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[Procedure amendment]

[Submission date] June 8, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

[0003] In FIG. 8, the distance X between the central axis and the end surface of the mechanism box 2 of the switchgear body, the distance Y and the end surface of the mechanism box 2 and the opening and closing device body 1 the outer surface of the adjacent switchgear between the bodies The distance Z is shown. Here, the distance Y is an arrangement allowance between the mechanism box 2 and the adjacent switchgear body 1 and is necessary in the sense that the mechanism box 2 and the surrounding space for maintenance points are secured. Yes, above distance X
Is an essential distance in the arrangement direction in the above configuration, and the distance Z is inevitably determined as the sum of the distance X, the distance Y, and the radius of the switchgear body 1.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

In FIG. 10, reference numeral 11 is a conductor, which is disposed substantially coaxially inside the switchgear body 1 for conducting a current, and 12 is a fixed contactor supported by the conductor 11.
Reference numeral 3 denotes a movable contactor that is linearly moved in the axial direction by a Scott-Russell type link mechanism (hereinafter referred to as a link mechanism) configured inside the mechanism box 2 to move toward and away from the fixed contactor 12. , 15 is pivotally mounted at one end to the end portion of the movable contactor 13, the pin 14 is fitted to the other end, centrally driving lever 16 and the pivoted link 16 is pivotally at the center of the link 15 The drive lever is attached and the other end is fixed to the drive rotary shaft 10, 17 is a guide for fitting the pin 14 fitted on the upper end of the link 15 and sliding it vertically, and 18 is the mechanism box. 2, a sleeve formed in a ring shape of a material such as Teflon which is provided in a portion that penetrates the movable contact 13 and guides and supports the movable contact 13 in the axial direction, and 19 are end portions of the movable contact 13. And the above-mentioned mechanism box 2 are connected A connection conductor FLEXIBLE of some.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction content]

[0021] Incidentally in the above description has dealt with the case of using the grounding device-disconnector, circuit breaker, etc., not limited to the case of a gas insulated switchgear using SF6 gas or the like as insulation medium, the interior of the switchgear body In the case of an air-insulated switchgear which has a mechanism for performing the opening / closing operation and has air as an insulating medium, the same effect can be obtained.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H02B 1/16 Z 13/02 13/075

Claims (2)

[Claims] 1. A Scott Russell type link mechanism, which is provided with a plurality of switchgear bodies having a movable contact and a fixed contact built therein, to open and close the movable contactor and the fixed contactor, is provided in the switchgear main body. In an opening / closing device that is housed in a box and configured to transmit the driving force generated by the operating device to the link mechanism via a drive rotation shaft, the link mechanism is arranged in a direction perpendicular to the arrangement direction of the opening / closing device body. Drive rotary shafts are respectively provided between the link mechanisms adjacent to each other, and the shaft ends of the drive rotary shafts are connected to each other in the mechanism box and are also connected to the link mechanism to form links of the opening / closing devices. A switchgear characterized by being configured to operate a mechanism. 2. A Scott Russell type link mechanism, which is provided with a plurality of switchgear bodies having a movable contactor and a fixed contactor incorporated therein, and which opens and closes the movable contactor and the fixed contactor, is provided in the switchgear body as well as the mechanism. In an opening / closing device that is housed in a box and configured to transmit the driving force generated by the operating device to the link mechanism via a drive rotation shaft, the link mechanism is arranged in a direction perpendicular to the arrangement direction of the opening / closing device body. Drive rotary shafts are respectively provided between the link mechanisms adjacent to each other, and the drive rotary shafts are arranged in the mechanism box so that their shaft ends face each other, and are connected to each other through the link mechanisms. The drive rotation shaft between the link mechanisms is arranged so as to form one axis substantially coaxially as a whole, and the link mechanism of each of the opening / closing devices is operated. Switchgear to do.