KR100420624B1 - A drawing apparatus for a drawer type electrical machinery - Google Patents

Abstract

A drawer which is shared among various types is obtained without being influenced by the size of an individual drawout-type electric machine.

On the bottom portion 11a of the draw-out type electrical device accommodating portion 11 of the switch device, a screw rod 17 having an axis in accordance with the drawing direction of the electric device 1 is rotatably supported, and the screw rod 17 The nut 19 engaged with the lower part of the electric device 1 was screwed together, and the nut 19 was moved by rotating the screw rod 17 to drive the electric device 1 in the insertion or drawer direction.

Description

Drawer of drawer-type electric equipment {A DRAWING APPARATUS FOR A DRAWER TYPE ELECTRICAL MACHINERY}

The present invention relates to a drawing apparatus for inserting and withdrawing operation of a drawer-type electrical apparatus stored in the switchgear.

8 is a perspective view showing, for example, a conventional drawing device shown in Japanese Patent Application Laid-Open No. 48-43931. In the drawings, 1 is a breaker, 2 is a screw rod disposed to be rotatable through the bogie of the breaker 1, 3 is a nut installed on the switchgear side, 4 is a screw rod 2 engaged with the screw rod 2, Handle to rotate

When the next breaker is inserted into the switchgear, the screw rod 2 is rotated by turning the handle 4 by bringing the screw rod 2 into contact with the nut 3, and the screw rod 2 on the nut 3. This is intertwined. Since the nut 3 is fixed to a switch gear (not shown), the breaker 1 is drawn into the switch gear as the screw rod 2 rotates.

By rotating the screw rod 2 in the reverse direction out of the above, the nut 3 moves to the left in Fig. 8 relatively, so that the breaker 1 is pulled out from the switchgear.

Conventional screw-driven take-out devices require many types of screws to accommodate circuit breakers of different sizes because the length required for the screw rod is determined from the dimensions of the breaker or the distance from the disconnection position to the connection position of the switchgear. There was a problem that a rod is needed. In addition, since the screw rod protrudes inwardly of the breaker, there is a problem in that a large occupied space is required at the manufacturing plant, at the installation place, or during transportation.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and a first object is to obtain a take-out apparatus capable of coping with any common circuit breaker of any size. A second object is to obtain a drawing device which is easy to install in the switchgear.

A third object is to obtain a safe drawer which can detect and operate an open / closed state of a switch. Further, a fourth object is to obtain an open / closed state detecting means capable of reliably detecting the open / closed state of the switch with a simple configuration. The fifth object is to obtain a shutter which can easily realize the interlocking operation with the open / closed state detection means. [0007] The sixth object is to obtain a take-out apparatus that is easy to assemble.

In the drawing device according to the present invention, a screw rod having a box of a switchgear, a driving part installed in the box and rotatably supported about an axis in accordance with a drawing direction of the drawer type electric machine, and engaged with the drawer type electric machine A nut which is fastened to the screw rod and acts to drive the drawer-type electronic device in the insertion or withdrawal direction by the rotation of the screw rod, a first position that completely covers the front face of the drive portion of the screw rod, and a front face of the drive portion. It is equipped with a shutter installed on a box moving between two positions.

A screw rod rotatably supported about an axis of the drawer type actuator in a drawing direction, and engaged with the drawer type actuator, and fastened to a screw rod, and the drawer type actuator is driven in an insertion or withdrawal direction by rotation of the screw rod. The operating nut, the open / closed state detection means for detecting the open / closed state of the drawer type actuator, the front side of the drive operation portion of the screw rod are closed and one side is engaged with the open / closed state detection means, and the open / closed state detection means detects the open state Only when there is a shutter that is movable to the position to open the front of the drive operation portion of the screw rod.

In addition, a nut that is engaged with the screw rod and the drawer type actuator pivotably supported around the shaft center along the drawing direction of the drawer type actuator, is fastened to the screw rod, and is operated to drive the drawer type actuator in the insertion or withdrawal direction; Opening / closing state detection means for detecting the open / closed state of the drawer-type switch, and closing the front of the driving operation portion of the screw rod, while engaging one side with the open / closed state detection means, and driving the screw rod only when the open / closed state detection means detects the open state. The shutter is movable to a position to open the front side of the operation unit, and the open / closed state detecting means has an interlocking member installed in the opening / closing moving between the open / close positions of the drawer-type switch and a shaft supported to be rotatable in parallel with the screw rod. , A detector on the arm, rotates along the shaft, engages with the interlocking member, opens and closes the switch Detecting the state and the actuator, and a sill located at one end of the shaft, is provided with an interlocking rod and for outputting the detected state.

In addition, the open / closed state detecting means includes an interlock member mounted on the switch and moving between the positions of the switch opening and closing positions, an axis parallel to the screw rod and rotatably supported, and rotated together with the shaft to engage with the interlock member. An interlock rod is provided which has the arm-shaped detection part which detects the open / close state of an actuator, and the arm-shaped output part provided in the end of a shaft, and outputs a detection state.

In addition, the shutter slides freely in the direction orthogonal to the lengthwise direction of the screw rod on the front surface of the drive control portion of the screw rod, and when one slides in the direction of opening the front surface of the drive manipulation portion, one side of the interlock rod of the open / close state detecting means The interlock rod is rotated in the direction in which the interlock rod is in contact with the interlock member of the actuator.

The screw rod, the open / closed state detection means, and the shutter are configured as one unit on a common base.

1 is a side cross-sectional view of a switchgear showing Embodiment 1 of the present invention.

Fig. 2 is a side sectional view showing a withdrawal state of the breaker in the breaker room of the embodiment 1 of the present invention.

FIG. 3 is a side sectional view taken from the pulled out state of FIG. 2 to the inserted state. FIG.

4 is a cross-sectional plan view seen in the direction B-B of FIG. 3.

5 is a cross-sectional plan view showing a state in which the operation handle is mounted in the state of FIG. 4.

FIG. 6 is a partial front view seen in the C-C direction of FIG. 3, wherein the breaker closes the shutter and closes the shutter; FIG.

FIG. 7 is a partial front view of the breaker in FIG. 6 open and the state immediately before the shutter is opened; FIG.

8 is a perspective view showing a conventional drawing out device of a circuit breaker;

<Description of protection of main parts of drawing>

1: breaker, 5: box, 11: breaker chamber,

11a: floorboard, 15: bogie frame, 17: screw rod,

17a: driving operation portion, 18: support member, 19: nut,

20: fixed piece, 22: operation handle, 23: shutter,

25: interlock pin, 27: axis, 27a: arm (detection part),

27b: arm (detection part), 27c: arm (output part), 27d: roller,

27f: interlock rod, 29: open / closed state detection means.

Embodiment 1

1 to 7 show a drawing device according to Embodiment 1 of the present invention. Fig. 1 shows a state in which a drawer-type breaker is built into a switchgear, 5 is a box body, 6 is a bus chamber accommodating a busbar 7 in a depth direction of the drawing, 8 is a cable 9 and a disconnector A cable chamber in which 10 is stored, 11 is a breaker chamber in which the breaker 1 is stored, and 11a is a bottom plate of the breaker chamber 11. The circuit breaker 1 is movable from the connection position shown in FIG. 1 to the disconnection position inclined to the left by the dimension A. FIG. As a matter of course, when checking the breaker 1, a tool (not shown) may be used to draw out to the left side and may be taken out of the switch gear. In addition, 12 is a contactor attached to the front end of the main circuit terminal of the circuit breaker 1, and is connected with the bus side terminal 13 and the disconnector side terminal 14.

When the breaker 1 is pulled out to the disconnecting position, the contactor 12 is dissociated from the terminals 13 and 14.

2 shows the breaker in the disconnected position, and FIG. 3 shows the state in the connected position. In the figure, 15 is a box-shaped bogie frame disposed below the breaker 1, 16 is a wheel for movement mounted on both sides of the bogie frame 15, 17 is a screw rod, 18 is the bottom of the breaker chamber 11 Attached to the support member for rotationally supporting the screw rod 17 freely, 19 is a nut mounted on the screw rod 17 in a clamped state, and 20 is between the protrusion 19a of the nut 19. The fixing piece 22 attached to the nut 19 by the bolt 21 in the state of sandwiching the bogie frame 15 is connected to the drive manipulating portion 17a of the hexagonal cross section formed on one side of the screw rod 17. An operation handle for indicating a state in which the engaging portion is engaged, 23 is a shutter covering the front surface of the driving operation portion 17a, 24 is a conventional stopper and is not fixed to the screw rod 17 on the outer circumference of the screw rod 17. When the nut 19 is moved to the right side, the nut 19 is brought into contact with the nut 19 to further reduce the movement to the right. The.

25 is an interlock pin mounted to the breaker 1 main body so as to be movable up and down, that is, the interlock member is configured such that the breaker 1 is kept in a down state in a closed state and cannot move upward. In this way, the screw rod 17 is rotated only, and the nut 19 is movable to drive the breaker in the insertion and withdrawal direction so that the screw rod 17 is of the size of the bogie frame 15 of the breaker 1. Irrespective of the need for preparation of the dimensions determined from the insertion and withdrawal strokes, it is not necessary to have multiple types of inventory, thereby facilitating production. In addition, since the screw rod 17 is mounted on the switchgear side, the space occupied by the breaker 1 is reduced without causing the screw rod 17 to protrude from the breaker 1 to the outside when the breaker is single. It is possible to improve the space efficiency during storage and transportation at the manufacturing plant installation site.

In addition, since the take-out device was designed to catch the lower side of the bogie frame 15 of the breaker 1 attached to the bottom plate of the breaker chamber 11, the take-out device only needs to be placed on the bottom plate 11a. The effect is that it is easy to attach. Moreover, since only the nut frame 15 is caught by the trolley frame 15, the machining of the trolley frame 15 side is almost unnecessary and the configuration can be simplified.

4 is a cross-sectional plan view of FIG. 3 viewed in the B-B direction.

In the figure, 26 is a position preservation member of the circuit breaker having a cross-section c, and has an angle hole engaged with the interlock pin 25 of the circuit breaker 1 at the top. The square hole 26a is a connection position of the breaker 1, and the square hole 26b is an engagement hole in a disconnection position. 27 is a shaft supported by the support member 18 in parallel with the rod 117, 27a, 27b is an arm extending in a direction perpendicular to the shaft 27, and rotates integrally with the shaft 27 At the same time, the interlock pin 25 is contacted below the square holes 26a and 26b to detect an open / closed state of the circuit breaker 1.

27c is an arm which is attached to one end of the shaft 27 and rotates integrally with the shaft 27, and is provided with a roller 27d supported at the distal end thereof so as to be rotatable. Since the arm 27c has a function of drawing out the open / closed signal of the breaker 1 detected by the arms 27a and 27b to the outside, the arm 27c serves as an output unit. In addition, the assembly to the axis 27-roller 27d is called an interlock rod. 28 is a torsion spring mounted on the outer circumference of the shaft 27 and operates the shaft 27 in a counterclockwise direction.

Moreover, the assembly which consists of the shaft 27, the arms 27a-27c, the roller 27d, and the torsion spring 28 is called open / closed state detection means 29. As shown in FIG.

The shutter 23 engages with the groove portions of one end of the screw rod 17 and the shaft 27 and is slidably supported from side to side in FIG.

The left end of the shutter 23 is engaged with the roller 27d, and the right end thereof is operated to the right by the tension spring 28, and is usually kept closed at all times. Thus, by combining the opening / closing state detection means 29 and the shutter 23, it is possible to obtain the opening / closing detection device with which the operation can be sure with a simple configuration.

FIG. 5 is a partial plane cross-sectional view showing a state in which the shutter 23 is slid in the left direction in FIG. 4 and the engaging portion of the handle 22 is coupled to the driving manipulation portion 17a of the screw rod 17.

FIG. 6 shows a front view as viewed in the direction C-C in FIG. 3. In the figure, a long horizontal hole 23a is provided in the shutter 23, and the long hole 23a is slidably mounted to the end of the screw rod 17 and the shaft 27 from side to side. In Fig. 6, the breaker 1 indicates a closed state, and the interlock pin 25 is lowered downward. In order to take out and insert the breaker 1, the shutter 23 is slid to the left, and the large diameter hole 23b at the right end of the long hole 23a is positioned in front of the screw rod 17. It is necessary to insert the engaging portion of the handle 22 through 23b, and to engage the drive operation portion 17a. However, as shown in FIG. 6, when trying to slide the shutter 23 to the left direction, it tries to push up the roller 27d which is in contact with the inclined part 23c of the shutter 23, but the roller 27d and the arm (Output section) 27c, shaft 27, arm (detection section) 27a, 27b, the tip of the arm (detection section) 27a or 27b touches the tip of the interlock pin 25. , It is impossible to rotate clockwise more about the axis 27 and as a result, the shutter 23 cannot slide to the left. For this reason, the take-out device cannot be operated.

7 shows the open state of the circuit breaker 1, and the interlock pin is moving upward. Therefore, when the shutter 23 is driven in the left direction, the inclined portion 23c pushes up the roller 27d, but the arm (detection portion) interlocked with the roller 27d by the rotation of the shaft 27 in the clockwise direction ( Since the tip of 27a) and 27b is movable upward, the shutter 23 slides the roller 27d and slides to the left.

As a result, since the large diameter hole 23b of the long hole 23a comes to the front of the screw rod 17, the engagement part of the handle 22 is inserted through this large diameter hole 23b, and it drives to the drive operation part 17a. Can be combined 7 shows the state just before the large diameter hole 23b comes to the front of the screw rod 17. As shown in FIG.

When the handle 22 is rotated in the right or left direction (a predetermined direction of drawing and inserting), the screw rod 17 rotates, and the nut 19 clamped to the screw rod 17 is the breaker chamber 11. Move forward or inward). At this time, since the projection part 19a of the nut 19 and the fixed piece 20 hold | maintain the lower part of the bogie frame 15 of the breaker 1, the breaker 1 is also pulled out by the movement of the nut 19. (Forward direction) or insertion side (inward direction). Then, when the operation handle 22 is removed, the shutter 23 is moved to the right by the tension spring 28 and the front of the screw rod 17 is closed. do.

Embodiment 2

In the first embodiment, a breaker is described as an example of a drawer-type electric device, but the present invention is not limited to the breaker path. For example, even a switchgear including a load breaker, a conductor, a ground breaker, and the like may be used. It exhibits the same effect as that of 1.

Embodiment 3

In the first embodiment described above, a breaker is described as an example of a drawer type electric device. However, if the breaker is brought into contact with the main circuit by insertion and withdrawal, the present invention also applies to an electric device such as a transformer without a switching function and a transformer for a cone sensor instrument. Of course.

At this time, since it is not necessary to confirm the open / closed state of the electric equipment, the open / closed state detection means is not necessary. Instead, it is necessary to check the energized state with the energized state detection means of the main circuit to insert and withdraw under no load.

Embodiment 4

In addition, in Embodiment 1, although the example which installed the support member 18 in the bottom plate 11a of the breaker chamber 11 was shown, for example, as shown in the range of FIG. 4D, the threaded rod 17 ), The support member 18, the shutter 23, the position preservation member 26, and the open / closed state detection means 29 are constituted as a unit on one base (width D), and the bottom plate 11a is provided. Since the work ratio on the outside of the switchgear can be increased by placing it on the top, it is possible to simplify the assembly work in the switchgear which causes the assembly air to become long. In the case where the open / close state detecting means 29 is grounded separately, only the screw rod 17 and the support member 18 may be attached to the base to be unitized.

Embodiment 5

In addition, in the above description, the case where the take-out device is attached to the lower part of the breaker 1 has been described, but the attachment position of the take-out device may be the side part or the middle part of the breaker.

Since this invention is comprised as mentioned above, it shows an effect as shown below.

A screw rod rotatably supported around an axis in accordance with the drawing direction of the electric machine and a nut that is fastened to the screw rod and moved in the insertion and withdrawal direction of the drawer-type electric machine by the rotation of the screw rod. Since it is installed, it is possible to obtain a drawing device which can be compatible with any size electric equipment.

The screw rod is rotatably supported at the bottom of the electrical appliance housing section around the shaft center along the drawing direction of the electrical appliance, and is screwed to the screw rod at the bottom of the drawer-type electrical appliance. Since a nut is installed to drive the device in the insertion or withdrawal direction, a withdrawal device that is easy to install in the switchgear can be obtained.

In addition, the screw rod supported by rotation and the rotation of the screw rod insert or move the switch in the withdrawal direction, the open / close state detecting means for detecting the open / close state of the switch, and the open / close state detecting means detect the open state. Since the shutter is provided to allow the front surface of the drive operation portion of the screw rod to be opened only when there is, the safe take-out apparatus capable of detecting and operating the open / closed state of the switch can be obtained.

Moreover, since the interlock member which moves between openings of each switch, and the opening / closing state detection means which consist of an interlock rod is provided, the open / closed state detection means which can reliably detect the open / closed state of a switch can be obtained with a simple structure.

In addition, in the direction orthogonal to the longitudinal direction of the screw rod, the shutter is provided with a free slide, and in the case of opening the front side of the drive penetrator, one side is engaged with the roller provided at the output end of the interlock rod of the open / close state detecting means. Is rotated in the direction of abutment with the interlock member of the switch, so that a shutter can be obtained which can easily realize the interlocking operation with the open / close state detecting means.

Moreover, since the screw rod, the open / closed state detection means, and the shutter are constituted by one uni on a common base, a take-out device that is easy to assemble can be obtained.

Claims (3)

A screw rod having a box of a switchgear, a drive part installed in the box and rotatably supported about an axis in the draw-out direction of the drawer type electronic device, and fastened to the screw rod while being engaged with the drawer type electric machine. Between the first position completely covering the front surface of the drive portion of the screw rod and the second position representing the front surface of the drive portion; Withdrawal device of the drawer-type electric machine with a shutter installed on the box to move the. A screw rod rotatably supported about an axis of the drawer type actuator in a pullout direction, and engaged with the drawer type actuator and fastened to the screw rod, and the drawer actuator is inserted or withdrawn in a rotational manner by the screw rod. A nut operable to drive the motor, an open / closed state detection means for detecting the open / closed state of the drawer type switch, and a front side of the drive operation portion of the screw rod, while one side is engaged with the open / closed state detection means, and detecting the open / closed state. And a shutter capable of moving to a position for opening the front surface of the drive operating portion of the screw rod only when the means detects an open state. A screw rod rotatably supported about an axis of the drawer type actuator in a pullout direction, a nut engaged with the drawer type actuator and fastened to the screw rod and actuated to drive the drawer type switch in the insertion or withdrawal direction And an opening / closing state detecting means for detecting an open / closed state of the drawer-type switch, and closing one of the front surfaces of the driving operation portion of the screw rod, while one side is engaged with the open / closed state detecting means, and the open / closed state detecting means detects the open state. And a shutter which is movable to a position for opening the front surface of the driving operation portion of the screw rod only when it is in operation, and the opening / closing state detecting means rotates in parallel with the interlocking member and the screw rod installed in the switch for moving between the opening and closing positions of the drawer-type switch. Possibly with a supported shaft, a detector on the arm, rotating along the shaft, A drawer-type electric machine withdrawal device having an interlocking rod that engages with an interlocking member, detects the open / closed state of the switch, and outputs the detected state by placing an actuator on the arm at one end of the shaft.