JP2008159537A - Electric spring operation mechanism for switching unit, abnormality monitoring method of switching unit, abnormality monitoring device and switching unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric spring operation mechanism for a switching unit in which an abnormality of a working state is monitored to obtain high accuracy and high reliability, to provide an abnormality monitoring method and a device of a switching unit which has a small size and a simple structure, and to provide a switching unit provided with the abnormality monitoring device. <P>SOLUTION: On an input cam 40 and an output lever 42, there are provided displacement gages 1, 2 and on the input cam 40, the output lever 42 and a transmission gear 36, there are provided torque sensors 3, 4 and 5. Furthermore, on the output lever 42, there are provided warp sensors 6, 7. Each of the dislocation gages 1, 2, the torque sensors 3, 4 and 5 and warp sensors 6, 7 has a predetermined determination standard value of a physical volume through a cable 8 and site relay board 9, and moreover, is connected with such a portable computer 10 as a laptop personal computer in order to make the abnormality determination of the electric spring operation mechanism. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electric spring operating mechanism for an open / close device, an abnormality monitoring technique for the open / close device that determines an operating state of the electric spring operating mechanism, and an open / close device having an abnormality monitoring device.

  In general, power devices are required to be smaller and lower in cost, and to be improved in reliability. In order to meet these requirements, it is necessary to satisfy predetermined functions with a simpler configuration. For example, as an operation mechanism that can obtain an operation force of an opening / closing device with a simple configuration, an electric spring operation mechanism that uses a spring releasing force as the operation force of the opening / closing device is often employed. The electric spring operating mechanism is a mechanism that stores the closing spring by the driving force of the electric motor, releases the stored closing spring to open the switching device, and stores the shut-off spring via the closing cam. is there.

  Such an electric spring operating mechanism does not use fluid pressure unlike an operating mechanism that uses air pressure or hydraulic pressure as the operating force of an open / close device, and therefore an auxiliary machine such as a compressor or accumulator that controls the pressure of the fluid. Furthermore, a pressure seal part is not necessary. Therefore, there is an advantage that the structure can be easily simplified and the reliability can be increased by reducing the size and cost of the electric device.

  Here, a conventional example of an electric spring operating mechanism for an opening / closing device will be specifically described with reference to FIGS. 7 and 8 are configuration diagrams of main members in a conventional electric operating mechanism for a switchgear, in which FIG. 7 shows a shut-off state of the switchgear and FIG. FIG. 9 is a side view of FIG. In FIG. 9, the frames 31 and 32 of the operation mechanism are shown, but in FIG. 7 and FIG. 8, these members are omitted to show the internal structure of the mechanism. Further, reference numerals 102, 103, 104, and 105 in FIG. 9 indicate bearings.

[Conventional configuration]
The main components of the electric spring operation mechanism are two springs, a closing spring 39 and a shut-off spring 46, a closing cam 40, and an output lever 42. In addition to this, a trigger mechanism for closing operation of the switching device And a trigger mechanism for blocking operation, and a drive system for applying a drive force to the closing spring 39.

(Drive system and closing spring 39)
As shown in FIGS. 7 to 9, an output gear 34 is installed in the electric motor 33, and a large gear 37 is connected thereto via transmission gears 35 and 36. As shown in FIG. 9, a closing spring support 38 is fixed to the large gear 37, and the closing spring support 38 is attached to an outer peripheral side end portion of the closing spring 39. That is, the driving force from the electric motor 33 is transmitted to the closing spring support 38 through the gears 34 to 37, and the end portions of the closing spring support 38 and the closing spring 39 are rotated together with the large gear 37. The electric motor 33 has a built-in one-way clutch so as not to rotate in the opposite direction by the force transmitted from the closing spring 39.

(Input cam 40)
The closing cam 40 is disposed below the electric motor 33 so as to be rotatable about a cam shaft 40b (shown in FIGS. 7 and 8). The charging cam 40 is provided with a cam 40a (shown in FIGS. 7 and 8).

  Further, a groove 40c penetrating in the diameter direction of the cam 40 is formed at one end of the cam shaft 40b, and the inner peripheral side end of the closing spring 39 is connected to the groove 40c (shown in FIG. 9). As shown in FIGS. 7 to 9, a cam roller 48 is attached to the closing cam 40 so as to penetrate in the rotating shaft direction of the closing cam 40.

(Output lever 42)
The output lever 42 is a substantially y-shaped member having an arm extending in three directions around the output shaft 42a (arranged in an inverted y shape in FIGS. 7 and 8). Adjacent to each other and rotatably arranged. The output lever 42 is provided with a connecting pin 42c and two connecting rollers 42d and 42e shown in FIGS. Of these, the connecting pin 42c is fixed to the tip of an arm portion extending upward in the drawings of FIGS.

  7 and 8, the two connecting rollers are rotatably installed at the tip of the arm portion extending downward in the drawing, and one of the connecting rollers 42d is separated from the cam 40a of the closing cam 40. Freely linked. The other connecting roller 42e is in contact with a latch 52a of an open prop 52 (described later) in the closed state (the state shown in FIG. 8), and in the shut-off state, the output lever 42 rotates to contact the damper 43 (see FIG. 7). Status). The output shaft 42a is connected to an electrode of a switching device (not shown).

(Blocking spring 46)
As shown in FIGS. 7 and 8, the blocking spring 46 is connected to and arranged at one end of the output lever 42. More specifically, one end of the cutoff spring 46 is connected to the connecting pin 42c of the output lever 42 via a spring rod 44 and a spring guide 45 attached to one end thereof. The cutoff spring 46 is supported by the spring cylinder 47 and arranged.

  The spring cylinder 47 includes a hollow pipe 47a and a block 47b fixed to the frames 31, 32 (shown in FIG. 9). The spring rod 44 is inserted into the pipe 47a of the spring cylinder 47, and the spring guide 45 is slidably disposed on the outer periphery of the pipe 47a.

(Trigger mechanism for throwing operation)
Next, a trigger mechanism that performs a closing operation and a blocking operation in the electric spring operating mechanism will be described with reference to FIGS. The triggering mechanism for the closing operation includes a cam roller 48 that penetrates the closing cam 40, a sea prop 49 adjacent to the closing cam 40, a catch 50, and a solenoid 51. The sea prop 49 is a bifurcated member and is rotatably supported by a rotating shaft 49b provided at the base end portion, and a roller 49a is provided at a portion where the bifurcated portion intersects.

  Further, the position of the closing cam 40 is held by the tip portion of the seaprop 49 and the cam roller 48 coming into contact with each other. Further, a return spring 56 with one end fixed is in contact with the edge of the seaprop 49. The catch 50 is in contact with the roller 49a of the seaprop 49. Furthermore, the catch 50 is connected to a solenoid 51, and when the solenoid 51 is operated, the catch 50 rotates counterclockwise in FIG.

(Trigger mechanism for shut-off operation)
The trigger mechanism for the shut-off operation includes an open prop 52 adjacent to the output lever 42, a catch 54 and a solenoid 55 disposed in the vicinity of the open prop 52. The O-prop 52 is rotatably supported by a rotation shaft 52d, and a latch 52a is rotatably disposed near the center via a latch pin 52b.

  A roller 52c is rotatably attached to the tip of the open prop 52. In the input state, the position of the output lever 42 is maintained and the position of the shut-off spring 46 is maintained by the latch 52a of the open prop 52 contacting the connecting roller 42e of the output lever 42. Further, return springs 57 and 58 having one end fixed are in contact with the edge of the open prop 52 and the latch 52a. The catch 54 is connected to a solenoid 55, and when the solenoid 55 is operated, the catch 54 rotates in the clockwise direction in FIG.

[Operation of conventional example]
Then, operation | movement of said electric spring operation mechanism for switchgears is demonstrated. That is, the charging cam 40 and the output lever 42 are rotated by the accumulation of the closing spring 39 by the electric motor 33 and the releasing spring 39 is released, and the opening / closing device is turned on. The output lever 42 is rotated by releasing the power 46 to shut off the switching device. These operations will be described in detail.

(Accumulation of closing spring 39)
When accumulating the closing spring 39, the driving force of the output gear 34 of the electric motor 33 is decelerated by the transmission gears 35 and 36. Further, due to the driving force transmitted to the closing spring support 38 via the large gear 37, the outer peripheral end of the closing spring 39 rotates around the rotation axis of the closing cam 40 in the clockwise direction in FIG. 39 is stored. At this time, the closing cam 40 in which the inner peripheral side end of the closing spring 39 is connected to the groove 40 c is held by the sea prop 49 via the cam roller 48 penetrating the closing cam 40.

(Release of closing spring 39)
When a closing command is input to the solenoid 51 from the stored state of the closing spring 39 as described above, the catch 50 is rotated counterclockwise by the operation of the solenoid 51, and the sea prop 49 is rotated counterclockwise in FIG. To do. As a result, the sea prop 49 is detached from the cam roller 48, and the support of the closing cam 40 by the sea prop 49 is released.

(Rotation of input cam 40 and output lever 42)
As the sea prop 49 is released, the inner peripheral end of the closing spring 39 rotates in the clockwise direction in FIG. 7 together with the closing cam 40, and the closing spring 39 is released. When the closing cam 40 rotates clockwise in FIG. 7, the output lever 42 rotates counterclockwise in FIG. The seaprop 49 is returned to the original position by the action of the return spring 56.

(Opening of switchgear and storage of shut-off spring 46)
When the output lever 42 rotates in the counterclockwise direction in FIG. 7, an electrode of an opening / closing device (not shown) connected to the output shaft 42a of the output lever 42 is driven to enter a closed state. At the same time, the spring rod 44 and the spring guide 45 move to the left in FIG. 7 on the connecting pin 42c of the output lever 42, and the shut-off spring 46 connected to the spring guide 45 is compressed to be in an accumulating state ( FIG. 7 to FIG. 8).

  The stored state of the shut-off spring 46 is maintained when the connecting roller 42e of the output lever 42 contacts the latch 52a of the open prop 52. The latch 52a of the open loop 52 rotates in the clockwise direction in FIG. 7 in contact with the connecting roller 42e of the output lever 42 during the closing operation, but returns to the original position in a short time by the action of the return spring 58. The positions of the output lever 42 and the cutoff spring 46 are maintained.

(Release of the shut-off spring 46 and rotation of the output lever 42)
When a shut-off command is input to the solenoid 55 from the open state of the opening / closing device as described above, the catch 54 rotates clockwise by the operation of the solenoid 55, and the open loop 52 and the latch 52a are integrated with each other in FIG. Rotate clockwise. As a result, the support of the output lever 42 is released, and the shut-off spring 46 in the stored state is released (from the state shown in FIG. 8 to the state shown in FIG. 7). The output lever 42 rotates in the clockwise direction in FIG. 7 by the driving force of the cutoff spring 46, and the spring rod 44 and the spring guide 45 move to the right in FIG. Return to position.

(Cut off switchgear)
When the output lever 42 rotates in the clockwise direction in FIG. 7 by the driving force of the cutoff spring 46, the electrode of the opening / closing device (not shown) connected to the output shaft 42a of the output lever 42 performs a cutoff operation and enters a cutoff state. . At this time, the damper 43 contacts the connecting roller 42e of the output lever 42 and exerts a buffering action on the output shaft 42. Thereafter, the open prop 52 returns to the original position by the action of the return spring 57. The electric spring operating mechanism for an opening / closing device that performs the operation as described above can reliably operate the opening / closing device with a simple configuration. Thereby, it is possible to contribute to downsizing and cost reduction of the switching device, and it is possible to meet the demand for improved reliability.

  By the way, in recent years when the demand for electric power is increasing, the demand for stabilization of electric power supply has become strict, and it is expected that a maintenance system that prevents accidents at an early stage will be introduced into the electric power system and high safety will be demonstrated. Yes. Therefore, specifically, a technique for monitoring the operating state of the switchgear has been proposed. For example, the technique of Patent Document 1 is a monitoring device for an opening / closing device operation mechanism, in which a motion measurement sensor is attached to two movable parts of a link mechanism in a movable contact, and the outputs are compared with each other. .

According to this monitoring device, the difference in movement between the two points of the link mechanism can be measured, and an increase in play due to wear of the mechanism, or a small change in movement due to position displacement of parts, etc. can be captured. Therefore, it is possible to monitor the operation related to the operating mechanism for the switching device with high accuracy.
Japanese Patent No. 2806150

  However, the following problems have been pointed out when a monitoring device for monitoring the operation mechanism is incorporated into the electric spring operation mechanism for the switchgear. In other words, the electric spring operating mechanism is a mechanism that uses the driving force of the spring as the operating force of the opening / closing device.Therefore, there are many members that operate because the compressor for fluid pressure control and the pressure seal portion are unnecessary. The number of objects to be monitored increased in proportion, and the configuration of the monitoring device itself tended to be complicated.

  That is, in the prior art, with the application of the monitoring device, there is a possibility that the downsizing, cost reduction, and high reliability, which are the advantages of the electric spring operation mechanism, may be reduced. For this reason, it has been strongly desired to greatly simplify the configuration of the monitoring device as well as the electric spring operation mechanism to be monitored.

  The present invention has been proposed in order to achieve such a problem, and an object of the present invention is to provide an electric spring operating mechanism for an opening / closing device that can exhibit high accuracy and high reliability by monitoring an abnormality in an operating state. Another object of the present invention is to provide an abnormality monitoring method and an abnormality monitoring device for an opening / closing device that can be realized with a small and simple configuration, and an opening / closing device including the abnormality monitoring device.

  In order to achieve the above object, the present invention provides a closing spring that stores energy by a driving force of an electric motor, a closing cam that connects the closing spring to one end, and a rotatable output that freely connects to the closing cam. A lever and a shut-off spring having one end connected to the output lever are provided so that the shut-off spring is stored via the closing cam and the output lever at the same time when the opening / closing device is turned on by releasing the closing spring. The electric spring operating mechanism for an open / close device configured as described above has the following characteristics.

  That is, a displacement meter is provided on one or both of the closing cam and the output lever, and a strain sensor is provided on the output lever. Alternatively, a displacement meter and a torque sensor are provided on one or both of the closing cam and the output lever.

  The present invention is also a method for monitoring an abnormality of an open / close device using the electric spring operating mechanism, wherein the output signal for monitoring the output signal of the displacement meter and the output signal of at least one of the strain sensor and the torque sensor. A monitoring step and a reference value of a specific displacement or a reference value of strain or torque in an angular displacement is set in advance as a determination reference value, and the specific displacement value or the angular displacement monitored in the output signal monitoring step It includes an abnormality determination step of determining whether or not the operating state of the electric spring operating mechanism for the switching device is normal by comparing the value of strain or torque in the above with the determination reference value.

  Furthermore, the present invention is an opening / closing device abnormality monitoring apparatus using the above-described switching device abnormality monitoring method provided with the electric spring operation mechanism, wherein the displacement meter output signal, the strain sensor, and the torque sensor An abnormality determination means is provided for connecting at least one of the output signal monitoring means for monitoring at least one of the output signals, the displacement meter, and the strain sensor and the torque sensor via a field relay panel, and the abnormality determination The means is set in advance with a reference value of a specific displacement or a reference value of strain or torque in an angular displacement as a judgment reference value, and a specific displacement value or a distortion in angular displacement monitored by the output signal monitoring means. Alternatively, it is determined whether the operating state of the electric spring operating mechanism for the switching device is normal by comparing the torque value with the determination reference value. It is characterized in that configured so that. The present invention also includes an opening / closing device provided with the above-described abnormality monitoring device.

  According to the present invention, by acquiring the output signal from the displacement meter and the output signal from the strain sensor or torque sensor, it is possible to monitor the strain or torque of the member limited to a specific displacement or angular displacement. The operating state of the electric spring operation mechanism can be accurately determined to monitor the occurrence of abnormality with high accuracy, and an extremely simple configuration comprising a displacement meter and a strain sensor or torque sensor is incorporated into the electric spring operation mechanism. Therefore, the downsizing, cost reduction, and high reliability of the mechanism can be maintained.

(1) Representative Embodiment [Configuration of Embodiment]
Hereinafter, typical embodiments of the present invention will be specifically described with reference to FIGS. 1 is a side view of an electric spring operating mechanism for an opening / closing device according to the present embodiment, FIG. 2 is a configuration diagram showing main members of the present embodiment, FIG. 3 is a block diagram of an abnormality monitoring device according to the present embodiment, and FIG. FIG. 6 is a graph for explaining the abnormality monitoring method according to the present embodiment. The present embodiment is applied to the electric spring operating mechanism shown in FIGS. 7 to 9, and the same members as those shown in these drawings are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 1, the displacement meter 1 is disposed in the vicinity of the bearing 104, and the displacement meter 2 is disposed in the vicinity of the bearing 105. The displacement meter 1 is provided on the closing cam 40, measures the angular displacement of the closing cam 40, and outputs the measurement signal. The displacement meter 2 is provided in the output lever 42, measures the angular displacement of the output lever 42, and outputs the measurement signal. There are several types of displacement gauges 1 and 2 such as a resistance method, but any method can be adopted and is not specified in the present embodiment.

  Further, torque sensors 3, 4, and 5 are provided on the closing cam 40, the output lever 42, and the transmission gear 36. More specifically, the torque sensor 3 is installed on the cam shaft 40 b of the closing cam 40, the torque sensor 4 is installed on the output shaft 42 a of the output lever 42, and the torque sensor 5 is installed on the rotating shaft 36 b of the transmission gear 36.

  These torque sensors 3, 4 and 5 output torque acting on the closing cam 40, the output lever 42 and the transmission gear 36 as signals. There are several types of torque sensors 3 to 5 such as a strain gauge method, but any method can be adopted and is not specified in the present embodiment.

  Further, as shown in FIG. 2, strain sensors 6 and 7 are provided on the edge of the arm portion of the output lever 42 extending downward in FIG. 2 in the vicinity of the connecting rollers 42d and 42e of the output lever 42. The strain sensors 6 and 7 are sensors that output strain generated in the output lever 42 as a signal.

  In addition, as shown in the block diagram of FIG. 3, the displacement meters 1 and 2, the torque sensors 3, 4 and 5, and the strain sensors 6 and 7 are each portable such as a notebook computer via a cable 8 and a field relay panel 9. It is connected to the computer 10. The portable computer 10 is an abnormality monitoring device that performs abnormality determination of the electric spring operation mechanism, and includes an output signal monitoring unit 10a and an abnormality determination unit 10b. The output signal monitoring unit 10 a is a part that monitors the output signals of the displacement meters 1, 2, torque sensors 3, 4, 5 and strain sensors 6, 7.

  The abnormality determination unit 10b sets a specific displacement value or a standard strain or torque value in an angular displacement as a determination reference value in advance, and specifies a specific one of the output signals monitored by the output signal monitoring unit 10a. By comparing the angular displacement value or the strain or torque value with the judgment reference value, it was confirmed that the operating state of the electric spring operating mechanism for the switchgear was normal, and an abnormality occurred in the operating state. The case is configured to make a determination. The ammeter 11 is connected to the electric motor 33.

[Operation of the embodiment]
Next, the operation of the present embodiment configured as described above will be described. The principle of storing the closing spring 39 by the electric motor 33, the principle of the closing operation in which the closing cam 46 and the output lever 42 are rotated by the closing spring 39 to drive the electrodes of the switching device (not shown) and at the same time the closing spring 46 is compressed. Further, the principle of the shut-off operation in which the output lever 42 is rotated by the shut-off spring 46 is the same as the example of the electric spring operating mechanism for switchgear according to the prior art shown in FIGS. Omitted.

  The displacement meter 1 and the displacement meter 2 output the angular displacements of the closing cam 40 and the output lever 42 as signals, respectively. The torque sensors 3, 4, and 5 output torques acting on the closing cam 40, the output lever 42, and the transmission gear 36, respectively, as signals. Further, the strain sensors 6 and 7 output the strain generated in the output lever 42 as a signal.

  The signals output from the displacement meters 1 and 2, the torque sensors 3, 4 and 5, and the strain sensors 6 and 7 enter the output signal monitoring unit 10 a of the portable computer 10 via the cable 8 and the field relay panel 9, respectively. The output signal monitoring unit 10a monitors these signals (output signal monitoring step). 4 to 6 are graphs of output signals.

  The angular displacement θ obtained from the signal from the displacement meter 1 or 2, the strain obtained from the signals from the strain sensors 6 and 7, and the torque obtained from the signals from the torque sensors 3, 4, and 5 are not independent of each other, but are mutually quantified. There is a relationship. For this reason, an accurate determination cannot be made by a monitoring method in which the maximum value of strain or torque is simply used as a determination reference value.

  Therefore, as shown in the graph of FIG. 4, in the abnormality determination unit 10b of the portable computer 10, a determination reference value εa for strain at a specific angular displacement θa is determined, and a case where the reference value εa is not satisfied is defined as abnormal. Diagnose (an abnormality determination step for strain). For example, when an abnormality occurs in the damper 43 that applies a buffering force in the vicinity of the angular displacement θa of the output lever 42, the strain ε of the strain sensor 6 at the angular displacement θa becomes a value εa ′ that is less than the determination reference value εa. The abnormality determination unit 10b can determine that the operation state of the damper 43 is abnormal.

Further, as shown in the graph of FIG. 5, in the abnormality determination unit 10b of the portable computer 10, the integrated amount E of the torque T1 between specific angular displacements θb and θc can be determined as a determination reference value. The torque integration amount E can be obtained by the following equation (integration step).

  For example, an excessive frictional force due to abnormal wear or the like is applied to the contact of the switching device that is driven between the angular displacements θb and θc of the output lever 42, and torque such as T1 ′ in FIG. In this case, the accumulated torque E ′ exceeds the determination reference value E, and the abnormality determination unit 10b determines that the operating state of the output lever 42 is abnormal (abnormality determination step for torque). In this method, the torque of a specific section is integrated and used as a determination reference value, so that an abnormality in torque T1 that is small as an absolute value can be diagnosed with high accuracy.

  As shown in the graph of FIG. 6, the reference value of the output T2 of the torque sensor 5 at a fixed time td is determined from the waveform of the current I of the electric motor 33 measured by the ammeter 11 with the time when the current starts to flow as a reference. deep. For example, when the transmission gear 36 is damaged, the output T2 ′ of the torque sensor 5 at a certain time td becomes a value larger than the determination reference value T2, and the abnormality monitoring device determines that the operating state is abnormal (abnormality determination step for torque). .

  The correlation between the angular displacement θ or the motor current I shown in FIGS. 4 to 6 and the strain ε and the torques T1 and T2 and the determination reference value depend on the model and operation mode of the electric spring operating mechanism for the switchgear. This embodiment is different as appropriate, and a typical example is described in this embodiment.

[effect]
According to the present embodiment as described above, the following effects can be obtained. That is, since the distortion and torque of each member acting during the operation of the electric spring operating mechanism for the opening / closing device and the respective angular displacements in the closing cam 40, the output lever 42, and the transmission gear 36 can be monitored, the electric spring operating mechanism for the opening / closing device. It is possible to provide a highly reliable electric spring operating mechanism for an opening / closing device capable of confirming that the operating state is normal and monitoring the occurrence of abnormality.

  Further, since an extremely simple configuration including a displacement meter and a strain sensor or a torque sensor is only incorporated into the electric spring operating mechanism, the mechanism can be reduced in size, cost, and reliability. Moreover, since the correlation between the strain and torque of each member and the angular displacement is quantitatively monitored, it is much higher than the monitoring method that simply uses the maximum value of strain and torque as the judgment reference value. An abnormality monitoring method and an abnormality monitoring apparatus having accuracy can be realized. Furthermore, in this embodiment, since a portable computer such as a notebook computer is used as the abnormality monitoring device in which the determination reference value is set, it is possible to provide an abnormality monitoring device that is inexpensive and can easily improve performance by aging update. Is possible.

(2) Other Embodiments The embodiment according to the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made according to the use of the electric spring operating mechanism for the switchgear. Moreover, although embodiment was described regarding an example of the electric spring operation mechanism for switchgears in this invention, this invention is easily applicable also to the electric spring operation mechanism for switchgears of another system.

  In addition, the target members to be monitored for abnormality are not limited to the damper 43, the output lever 42, and the transmission gear 36 described above. Including a trigger mechanism for use or blocking operation, and members constituting a drive system for applying a drive force to the closing spring 39 can be selected as appropriate. Furthermore, this invention also includes the switchgear provided with said abnormality monitoring apparatus.

The side view of the electric spring operation mechanism for switchgear of a typical embodiment of the present invention. The block diagram of the electric spring operation mechanism for switchgears concerning this embodiment. The block diagram of this embodiment. The graph for demonstrating the abnormality monitoring method which concerns on this embodiment. The graph for demonstrating the abnormality monitoring method which concerns on this embodiment. The graph for demonstrating the abnormality monitoring method which concerns on this embodiment. The block diagram which shows the interruption | blocking state of the conventional electric spring operation mechanism for switchgears. The block diagram which shows the injection | throwing-in state of the conventional electric spring operation mechanism for switchgears. The side view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2 ... Displacement meter 3, 4, 5 ... Torque sensor 6, 7 ... Strain sensor 8 ... Cable 9 ... Field relay panel 10 ... Portable computer 10a ... Output signal monitoring part 10b ... Abnormality judgment part 11 ... Ammeter 31, 32 ... Frame 33 ... Electric motor 34 ... Output gear,
35, 36 ... transmission gear 36b ... rotating shaft,
37 ... large gear 38 ... closing spring support 39 ... closing spring 40 ... closing cam 40a ... cam 40b ... cam shaft 40c ... groove 42 ... output lever 42a ... output shaft 42c ... connecting pins 42d, 42e ... connecting roller 43 ... damper 44 ... Spring rod 45 ... Spring guide 46 ... Blocking spring 47 ... Spring cylinder 47a ... Pipe 47b ... Block 48 ... Cam roller 49 ... Sea prop 49a ... Roller 49b ... Rotating shaft 50, 54 ... Catch 51, 55 ... Solenoid 52 ... Open prop 52a ... Latch 52b ... Latch shaft 52c ... Roller 52d ... Rotating shafts 56, 57, 58 ... Return springs 102, 103, 104, 105 ... Bearings

Claims (10)

A closing spring that stores energy by the driving force of the electric motor, a closing cam that connects the closing spring to one end, a rotatable output lever that freely connects to the closing cam, and a break that connects one end to the output lever An electric spring operating mechanism for an opening / closing device configured to store an opening / closing device by releasing the closing spring and simultaneously store the cutoff spring via the closing cam and the output lever. ,
A displacement meter is provided on one or both of the closing cam and the output lever,
An electric spring operating mechanism for an opening / closing device, wherein the output lever is provided with a strain sensor. A closing spring that stores energy by the driving force of the electric motor, a closing cam that connects the closing spring to one end, a rotatable output lever that freely connects to the closing cam, and a break that connects one end to the output lever An electric spring operating mechanism for an opening / closing device configured to store an opening / closing device by releasing the closing spring and simultaneously store the cutoff spring via the closing cam and the output lever. ,
An electric spring operating mechanism for an opening / closing device, wherein a displacement meter and a torque sensor are provided on one or both of the closing cam and the output lever. A closing spring that stores energy by the driving force of the electric motor, a closing cam that connects the closing spring to one end, a rotatable output lever that freely connects to the closing cam, and a break that connects one end to the output lever An electric spring operating mechanism for an opening / closing device configured to store an opening / closing device by releasing the closing spring and simultaneously store the cutoff spring via the closing cam and the output lever. ,
A transmission gear for transmitting the driving force of the motor to the closing spring is connected to the motor,
An electric spring operating mechanism for an opening / closing device, wherein a torque sensor is provided on a rotation shaft of the transmission gear. An abnormality monitoring method for an opening / closing device using the electric spring operation mechanism according to claim 1,
An output signal monitoring step of monitoring an output signal of the displacement meter and an output signal of at least one of the strain sensor and the torque sensor;
A reference value of a specific displacement, or a reference value of a strain or torque in an angular displacement is set in advance as a determination reference value, and a specific displacement value monitored in the output signal monitoring step, or a distortion in an angular displacement or An abnormality monitoring method for an opening / closing device, comprising: an abnormality determination step for determining whether the operating state of the electric spring operating mechanism for the opening / closing device is normal by comparing a torque value with the determination reference value. Including an integration step of calculating an integrated amount of displacement at two or more specific points, or an integrated amount of strain or torque between angular displacements;
In the abnormality determination step, it is determined whether or not the operating state of the electric spring operating mechanism for the switching device is normal by comparing the integrated amount calculated in the integrating step with the preset determination reference value. The method for monitoring an abnormality of the switchgear according to claim 4. An abnormality monitoring method for an opening / closing device using the electric spring operating mechanism according to claim 3,
An output signal monitoring step of monitoring the output signal of the torque sensor with reference to the current waveform of the motor;
A standard torque value after a certain period of time based on the current waveform is set in advance as a determination reference value, and a torque value after a certain period of time based on the current waveform monitored in the monitoring step is determined. An abnormality monitoring method for an opening / closing device including an abnormality determining step of determining whether the operating state of the electric spring operating mechanism for the opening / closing device is normal by comparing with the determination reference value.   The open / close device electric spring operating mechanism includes a peripheral member that is connected, engaged or abutted with the closing cam, the output lever, or the electric motor. In the abnormality determination step, the state of the peripheral member is normal. The switch monitoring apparatus abnormality monitoring method according to any one of claims 4 to 6, characterized by: An abnormality monitoring device for an opening / closing device comprising the electric spring operation mechanism according to any one of claims 1 to 3,
An output signal monitoring means for monitoring an output signal of the displacement meter and an output signal of at least one of the strain sensor and the torque sensor;
An abnormality determining means for connecting the displacement meter and at least one of the strain sensor and the torque sensor via a field relay board is provided,
The abnormality determination means is preset with a reference value of a specific displacement or a reference value of strain or torque in an angular displacement as a determination reference value, and a specific displacement value or an angle monitored by the output signal monitoring means An opening / closing device configured to determine whether an operating state of an electric spring operating mechanism for an opening / closing device is normal by comparing a strain or torque value in displacement with the determination reference value. Anomaly monitoring device.   The switchgear abnormality monitoring apparatus according to claim 8, wherein a portable computer is used as the abnormality determination means.   A switchgear comprising the switchgear abnormality monitoring device according to claim 8 or 9.

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