KR102662150B1 - Interlocking device of the earthing switch and the door of the distribution box - Google Patents

Abstract

An interlock device for a grounding switch and a distribution box door is disclosed. An interlock device between a ground switch and a distribution box door according to an aspect of the present invention includes a door that opens or closes one side of the distribution box; a grounding switch installed on the other side of the distribution box and grounding the residual voltage of the distribution box; a driving unit provided between the one side and the other side of the distribution box and driving the ground switch according to rotation; and a locking unit that locks or unlocks the driving unit as the door is opened or closed. may include.

Description

Interlocking device of the earthing switch and the door of the distribution box}

The present invention relates to an interlock device between an earthing switch and a distribution box door. More specifically, an earthing switch that operates only when the distribution box door is closed and stops working when the door is open, thereby improving user safety. and an interlock device for a distribution box door.

Generally, circuit breakers are installed in distribution boxes along with other electronic devices to operate or control power systems and operate electric motors in power plants or substations. Circuit breakers installed inside such distribution boxes are operated in the run position where voltage and current are supplied and the test position only to check the operation status of the breaker. When such a circuit breaker is in the operating position, the breaker operates when a fault current such as a short circuit or ground fault occurs, preventing safety accidents. However, when the circuit breaker is in the test position, the breaker does not operate, so grounding is required to ensure human and material safety. After installing the switch at the rear of the distribution box, safety accidents are prevented with the grounding switch turned on.

As shown in Figure 1, the distribution box (1) is divided into a circuit breaker room (6) and a transformer room (7). A circuit breaker (2) is stored in the circuit breaker room (6), and a grounding switch (3) is installed at the rear of the circuit breaker room (6). And, a transformer 8 and a fuse 9 are stored in the transformer room 7. At this time, if the circuit breaker (2) requires maintenance due to occurrence of fault voltage, etc., the door (5) of the circuit breaker room (6) is opened and the circuit breaker (2) is taken out. In addition, even if the circuit breaker (2) is moved to the test position, residual voltage remains in the circuit breaker room (6), so the residual voltage is removed by turning on the ground switch (3) and then maintenance is performed, thereby ensuring the safety of users and electronic devices. This is secured.

However, if the ground switch is opened due to the user's carelessness while the door 5 is open, there is a risk that a safety accident may occur due to residual voltage.

The present invention is to solve the above problems, and the purpose of the present invention is to provide a grounding switch that improves user safety by operating the grounding switch only when the distribution box door is closed and stopping it when the door is open. An interlock device for a distribution box door is provided.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned can be clearly understood by those skilled in the art from the description below.

According to one aspect of the present invention, a door opening or closing one side of the distribution box; a grounding switch installed on the other side of the distribution box and grounding the residual voltage of the distribution box; a driving unit provided between the one side and the other side of the distribution box and driving the ground switch according to rotation; and a locking unit that locks or unlocks the driving unit as the door is opened or closed. An interlock device of a grounding switch and a distribution box door is provided, including a.

At this time, the driving unit includes a shaft rotating between the one side and the other side of the distribution box; And it may include a link unit that drives the ground switch according to rotation of the shaft.

At this time, the locking part includes a support part coupled to one side of the distribution box; a plate capable of reciprocating along one side of the support portion and having a protrusion formed thereon that penetrates one side of the distribution box and contacts the door; a spring disposed between the one side of the distribution box and the plate, and pressing the plate toward the one side of the distribution box; and a locking portion that protrudes from the outer peripheral surface of the shaft and forms a contact surface corresponding to one surface of the plate.

At this time, when the door opens one side of the distribution box, the plate is moved to the one side of the distribution box by the spring, and as the plate is moved to the one side of the distribution box, one surface of the plate and the contact surface This contact may stop the rotation of the shaft.

At this time, when the door closes the one side of the distribution box, the protrusion is pressed by the door, and the plate moves to the other side of the distribution box, and as the plate moves to the other side of the distribution box, , one surface of the plate and the contact surface are released from contact, so that the shaft can rotate.

At this time, the plate includes: a first plate arranged in parallel and spaced apart from the shaft; and a second plate extending in a vertical direction from the first plate, wherein when the door closes the one side of the distribution box, the second plate may be formed to be spaced apart from the engaging portion by the length of the protrusion. there is.

At this time, the support part is provided with a guide part that protrudes toward the first plate, a long guide hole is formed in the first plate, and the guide part can be moved along the guide hole.

At this time, the contact surface is a first contact surface; It may include a second contact surface formed parallel to the first contact surface.

In addition, according to another aspect of the present invention, the locking part includes a support part coupled to one side of the distribution box; a first plate capable of reciprocating along one side of the support portion and having a protrusion formed thereon that penetrates one side of the distribution box and contacts the door; a second plate linked with the first plate and moved in a direction perpendicular to the first plate; a spring disposed between the one side of the distribution box and the second plate, and pressing the second plate toward the one side of the distribution box; And it may include a locking groove formed on the outer peripheral surface of the shaft and having a shape corresponding to one end of the second plate.

According to the above configuration, the interlocking device between the grounding switch and the distribution box door according to the embodiment of the present invention stops the operation of the grounding switch by the locking unit when the door is opened, thereby preventing the user from operating during the maintenance of the distribution box. Stability is ensured.

1 is a perspective view showing a power distribution box according to the prior art.
Figure 2 is a perspective view showing the appearance of a distribution box in which a grounding switch and an interlock device for the distribution box door are installed according to an embodiment of the present invention.
Figure 3 is a perspective view of the exterior of a distribution box in which a grounding switch and an interlock device for a distribution box door according to an embodiment of the present invention are installed from another side.
Figure 4 is a perspective view showing a state in which the door is closed on one side of the distribution box in the interlock device between the ground switch and the distribution box door according to an embodiment of the present invention.
Figure 5 is a diagram showing a locking portion of an interlock device for a ground switch and a distribution box door according to an embodiment of the present invention.
Figure 6 is a view of the locking part of the interlocking device of the ground switch and distribution box door according to an embodiment of the present invention as seen from another side.
Figure 7 is a diagram showing the rotation of the shaft of the interlock device of the ground switch and the distribution box door according to an embodiment of the present invention.
Figure 8 is a perspective view showing a state in which the door opens one side of the distribution box in the interlock device between the ground switch and the distribution box door according to an embodiment of the present invention.
Figure 9 is a diagram showing a state in which the locking part of the ground switch and the interlocking device of the distribution box door is moved toward one side of the distribution box according to an embodiment of the present invention.
Figure 10 is a view from another side showing the locking part of the grounding switch and the interlocking device of the distribution box door according to an embodiment of the present invention being moved toward one side of the distribution box.
Figure 11 is a diagram showing a state in which the locking part of the interlocking device of the ground switch and the distribution box door is in contact with the engaging part according to an embodiment of the present invention.
Figure 12 is a diagram schematically showing a locking portion of an interlock device for a ground switch and a distribution box door according to another embodiment of the present invention.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. The present invention may be implemented in many different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention, parts not related to the description have been omitted in the drawings, and identical or similar components are given the same reference numerals throughout the specification.

The words and terms used in this specification and claims are not to be construed as limited in their usual or dictionary meanings, but according to the principle that the inventor can define terms and concepts in order to explain his or her invention in the best way. It must be interpreted with meaning and concepts consistent with technical ideas.

Therefore, the embodiments described in this specification and the configuration shown in the drawings correspond to a preferred embodiment of the present invention, and do not represent the entire technical idea of the present invention, so the configuration may be replaced by various alternatives at the time of filing of the present invention. There may be equivalents and variations.

In this specification, terms such as “comprise” or “have” are intended to describe the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to describe the presence of one or more other features. It should be understood that it does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

A component being “in front,” “rear,” “above,” or “below” another component means that it is in direct contact with the other component, unless there are special circumstances. This includes not only those placed at the “bottom” but also cases where another component is placed in the middle. In addition, the fact that a component is "connected" to another component includes not only being directly connected to each other, but also indirectly connected to each other, unless there are special circumstances.

Hereinafter, an interlock device for a ground switch and a distribution box door according to an embodiment of the present invention will be described with reference to the drawings.

Figure 2 is a perspective view showing the appearance of a distribution box in which an earthing switch and an interlock device for a distribution box door are installed according to an embodiment of the present invention, and Figure 3 is a perspective view showing the appearance of an earthing switch and an interlock device for a distribution box door according to an embodiment of the present invention. It is a perspective view of the appearance of the installed distribution box from another side, and Figure 4 is a perspective view showing a state in which the door is closed on one side of the distribution box in the interlock device between the ground switch and the distribution box door according to an embodiment of the present invention.

2 to 4, the interlock device 100 of the grounding switch and the distribution box door according to an embodiment of the present invention includes doors 111 and 112, a grounding switch 120, a driving unit 130, and a locking unit ( 200).

The doors 111 and 112 open or close one side of the distribution box 110. In addition, the distribution box 110 is provided with an accommodation space 110a where a circuit breaker (not shown) is installed. At this time, not only the circuit breaker but also a transformer (not shown) is installed in the receiving space 11a of the distribution box 110. In addition, the doors 111 and 112 are a first door 111 that opens or closes one side of the distribution box 110 to take out the rotary circuit breaker, and a first door 111 that opens or closes one side of the distribution box 110 to maintain the transformer. It includes a second door 112 that opens or closes.

The ground switch 120 is installed on the other side of the distribution box 110, which is opposite to one side. The grounding switch 120 is operated to distinguish between a closed state that grounds the residual voltage of the distribution box 110 and an open state that stops grounding when the circuit breaker is activated. For convenience of explanation, Figures 2 to 4 show the ground switch 120 in an engaged state.

The driving unit 130 is provided between one side and the other side of the distribution box 110 and drives the ground switch according to rotation. At this time, the driving unit 130 includes a shaft 131, a link unit 132, and a handle 113. The shaft 131 is generally shaped like a rod. In addition, the shaft 131 is rotatably coupled between the first side 115 and the second side 116 of the distribution box 110 in a clockwise or counterclockwise direction. Additionally, the link unit 132 drives the ground switch 120 according to the rotation of the shaft 131. For example, when the shaft 131 rotates clockwise, the link portion 132 moves upward along the Z axis to operate the ground switch 120 so that the ground switch 120 is in an engaged state. . Conversely, when the shaft 131 rotates counterclockwise, the link portion 132 moves downward along the Z axis to operate the ground switch 120 so that the ground switch 120 is in an open state. . Additionally, the handle 113 includes a shaft coupling portion 113a and a handle portion 113b coupled to one side of the shaft 131. When the handle 113 is rotated clockwise or counterclockwise by a user gripping the handle portion 113b, the shaft 131 is rotated clockwise or counterclockwise. Additionally, according to various embodiments of the present invention, the handle portion 113b is not limited to being gripped only by the user, but can also be applied as a connection structure connected to a separate rotation device.

The locking unit 200 locks or unlocks the driving unit 130 as the doors 111 and 112 are opened or closed. As the locking unit 200 locks the driving unit 130, the ground switch 120 is maintained in an engaged state, thereby ensuring user safety. Conversely, as the locking unit 200 unlocks the driving unit 130, the ground switch 120 is operated in an open state, thereby preventing interference with the circuit breaker of the distribution box 110. The locking unit 200 will be described in detail later with reference to the drawings.

Figure 5 is a view showing the locking part of the interlocking device of the grounding switch and the distribution box door according to an embodiment of the present invention, and Figure 6 is a view showing the locking part of the interlocking device of the grounding switch and the distribution box door according to an embodiment of the present invention from another side. 7 is a view showing the rotation of the shaft of the interlock device of the ground switch and the distribution box door according to an embodiment of the present invention.

Referring to FIGS. 5 to 7 , the locking unit 200 (see FIG. 4 ) will be examined in a state in which the door 111 closes the distribution box 110 (see FIG. 4 ). The locking part 200 (see FIG. 4) includes a support part 210, a plate 220, a spring 230, and a locking part 240.

The support portion 210 is coupled to one side of the distribution box 110 (see FIG. 4). Specifically, the support portion 210 is formed in a plate shape and is coupled to the first side 115 of the distribution box 110 (see FIG. 4).

The plate 220 reciprocates along one surface of the support portion 210. In addition, the plate 220 includes a protrusion 220a that penetrates one side of the distribution box 110 (see FIG. 4) and contacts the door 111. When the door 111 closes one side of the distribution box 110, the door 111 moves the protrusion 220a in the first direction ①. Here, the first direction ① refers to a direction toward the other side of the distribution box 110 (see FIG. 4). And, as the protrusion 220a moves in the first direction (①), the plate 220 moves in the first direction (①). Additionally, the plate 220 includes a first plate 221 and a second plate 222. The first plate 221 is arranged parallel to and spaced apart from the shaft 131. In addition, long guide holes 221a and 222a are formed in the first plate 221, and guide portions 221b and 222b are formed in the support portion 210 to protrude toward the first plate 221. is provided. The guide parts 221b and 222b move along the guide holes 221a and 222a. That is, as the guide parts 221b and 222b move along the guide holes 221a and 222a, the first plate 221 can be stably moved on one surface of the support part 210. And, the second plate 222 extends in a vertical direction from the first plate 221. That is, the second plate 222 is formed to intersect the shaft 131.

The spring 230 is disposed between the one side of the distribution box 110 (see FIG. 4) and the plate 220, and presses the plate 220 toward one side of the distribution box 110 (see FIG. 4). . And, one end of the spring 230 is connected to the spring fixing part 211 coupled to one side of the distribution box 110 (see FIG. 4), and the other end of the spring 230 is connected to the plate 220. do. At this time, when the door 111 closes one side of the distribution box 110 (see FIG. 4), even if the protrusion 220a moves in the first direction ①, the spring 230 moves in the first direction ①. By pressing the plate 220 in the direction opposite to the direction (①), the plate 220 is prevented from moving excessively along the support portion 210.

The locking portion 240 is protruding from the outer peripheral surface of the shaft 131. In addition, the locking portion 240 has a contact surface 241 corresponding to one surface of the second plate 222. At this time, as shown in FIG. 7, when the door 111 closes one side of the distribution box 110 (see FIG. 4), the second plate 222 extends the length of the protrusion 220a ( It is formed to be spaced apart from the locking portion 240 by a predetermined length (L2) by L1. In this way, when the door 111 closes one side of the distribution box 110 (see FIG. 4), the locking portion 240 is spaced apart from the second plate 222, thereby allowing the user to use the shaft ( 131) can be rotated to change the ground switch 120 to the closed or open state.

Figure 8 is a perspective view showing a state in which the door is open on one side of the distribution box in the interlock device between the grounding switch and the distribution box door according to an embodiment of the present invention, and Figure 9 is a grounding switch and a distribution box door according to an embodiment of the present invention. It is a diagram showing the locking part of the interlocking device of the distribution box door being moved toward one side of the distribution box, and Figure 10 shows the locking part of the interlocking device of the grounding switch and distribution box door according to an embodiment of the present invention being moved toward one side of the distribution box. This is a view viewed from another side, and FIG. 11 is a view showing the locking portion of the interlocking device of the ground switch and distribution box door in contact with the locking portion according to an embodiment of the present invention.

Referring to FIGS. 8 to 11 , the locking unit 200 will be examined in a state in which the door 111 opens the distribution box 110 .

When the door 111 opens one side of the distribution box 110, the protrusion 220a is not pressed by the door 111. And, the plate 220 is moved in the second direction (②) of the distribution box 110 by the spring 230. Here, the second direction (②) refers to a direction toward one side.

And, as the plate 220 moves to one side of the distribution box 110, one surface 220b of the plate 220 and the contact surface 241 come into contact. And, when one surface 220b of the plate 220 and the contact surface 241 come into contact, the rotation of the shaft 131 is stopped. Accordingly, even if the user inadvertently rotates the shaft 131 while the door 111 is open, the locking portion 240 is fixed to the plate 220 and the ground switch 120 is Because the input state is maintained, the user is prevented from being exposed to residual voltage.

Conversely, when the door 111 closes the one side of the distribution box 110, the plate 220 moves to the other side of the distribution box 110, and one side 220b of the plate 220 The contact surface 241 is released from contact and the shaft 131 can be rotated. That is, when the circuit breaker of the distribution box 110 is operated again, the shaft 131 is operated to rotate, so that the ground switch 120 can be switched to the open state.

Additionally, according to one embodiment of the present invention, the contact surface 241 includes a first contact surface 241a and a second contact surface 241b. The second contact surface 241b is formed parallel to the first contact surface 241a. Accordingly, when the shaft 131 is rotated approximately 180°, either the first contact surface 241a or the second contact surface 241b may contact the one surface 220b of the plate 220. there is. Meanwhile, the second contact surface 241b is not limited to being formed parallel to the first contact surface 241a, but is tilted by an angle corresponding to the rotation angle of the first contact surface 241a and the shaft 131. can be formed.

Figure 12 is a diagram schematically showing a locking portion of an interlock device for a ground switch and a distribution box door according to another embodiment of the present invention.

Referring to FIG. 12, the interlock device 300 of a grounding switch and a distribution box door according to another embodiment of the present invention includes a door, a grounding switch, a driving unit, and a locking unit 310, and is the same or similar to the above-described embodiment. The description of the components will be replaced with the above-described description, and the locking unit 310 will be mainly explained.

The locking part 310 includes a support part 210 (see FIG. 5) coupled to one side of the distribution box 110, a first plate 321, a second plate 322, a spring 330, and a locking part 131'. Includes b).

The first plate 321 may be moved back and forth in the first direction (①) or the second direction (②) along one surface of the support portion (210, see FIG. 5). In addition, the first plate 321 is formed with a protrusion 321a that penetrates one side of the distribution box 110 and contacts the door.

The second plate 322 is link-coupled with the first plate 321 and can be reciprocated in the third direction (③) or fourth direction (④), which is a direction perpendicular to the first plate (321). there is. At this time, a link guide hole 322a formed to be inclined at an angle to the first plate 321 is formed in the second plate 322. In addition, the first plate 321 is provided with a link guide portion 322b inserted into the link guide hole 322a. And, the link guide portion 322b moves along the link guide hole 322a. Accordingly, the first plate 321 and the second plate 322 can be relatively moved while remaining coupled to each other. For example, when the first plate 321 is moved in the first direction (①), the second plate 322 is moved in the fourth direction (④). Conversely, when the first plate 321 is moved in the second direction (②), the second plate 322 is moved in the third direction (③).

The locking portion 131'b is formed on the outer peripheral surface of the shaft 131'. At this time, a locking groove 131'b having a shape corresponding to one end 325 of the second plate 322 is formed in the locking portion 131'b.

Accordingly, when the door closes one side of the distribution box 110, the door presses the protrusion 321a and the first plate 321 moves in the first direction ①. And, as the first plate 321 moves in the first direction (①), the second plate 322 moves in the fourth direction (④) so that one end of the second plate 322 ( 325) is inserted into the locking groove (131'a). And, as the one end 325 of the second plate 322 is inserted into the locking groove 131'a, the rotation of the shaft 131' stops, so the operation of the ground switch stops and the user's Stability is ensured.

Conversely, when the door opens one side of the distribution box 110, the door does not press the protrusion 321a. And, as the spring 330 pulls the second plate 322 in the second direction (②), the second plate 322 moves together with the first plate 321 in the second direction (②). It moves to ②). At this time, as the first plate 321 moves in the second direction (②), the second plate 322 moves in the third direction (③) and one end of the second plate 322 (325) is separated from the locking groove (131'a). Accordingly, since the shaft 131' is released from the restraint of the second plate 322, the shaft 131' can be rotated. As the shaft 131' rotates clockwise or counterclockwise, the ground switch is switched to an open state to prevent the ground switch from interfering with the circuit breaker.

Although the embodiments of the present invention have been described, the spirit of the present invention is not limited to the embodiments presented in this specification, and those skilled in the art who understand the spirit of the present invention can add or change components within the scope of the same spirit. , deletion, addition, etc., other embodiments can be easily proposed, but this will also be said to fall within the scope of the present invention.

100: Interlock device of earthing switch and distribution box door
110: distribution box 111: door
120: ground switch 130: driving unit
200: Locking part

Claims (9)

A door that opens or closes one side of the distribution box;
a grounding switch installed on the other side of the distribution box and grounding the residual voltage of the distribution box;
a driving unit provided between the one side and the other side of the distribution box and driving the ground switch according to rotation; and
a locking unit that locks or unlocks the driving unit as the door is opened or closed;
Including,
The driving unit,
a shaft rotated between the one side and the other side of the distribution box; and
It includes a link unit that drives the ground switch according to rotation of the shaft,
The locking part,
A support portion coupled to one side of the distribution box;
a plate capable of reciprocating along one side of the support portion and having a protrusion formed thereon that penetrates one side of the distribution box and contacts the door;
a spring disposed between the one side of the distribution box and the plate, and pressing the plate toward the one side of the distribution box; and
An interlock device for a ground switch and a distribution box door, including a locking portion protruding from the outer peripheral surface of the shaft and forming a contact surface corresponding to one surface of the plate.
delete delete According to claim 1,
When the door opens one side of the distribution box, the plate is moved to the one side of the distribution box by the spring,
As the plate is moved to the one side of the distribution box, one surface of the plate and the contact surface of the locking portion come into contact with each other and the rotation of the shaft is stopped.
According to claim 1,
When the door closes the one side of the distribution box, the protrusion is pressed by the door, so that the plate moves to the other side of the distribution box,
As the plate is moved to the other side of the distribution box, one surface of the plate and the contact surface are released from contact, allowing rotation of the shaft.
According to claim 1,
The plate is,
a first plate arranged parallel to and spaced apart from the shaft; and
It includes a second plate extending in a vertical direction from the first plate,
When the door closes one side of the distribution box, the second plate is formed to be spaced apart from the latching portion by the length of the protrusion.
According to clause 6,
The support portion is provided with a guide portion that protrudes toward the first plate,
A guide hole having a long hole shape is formed in the first plate,
An interlock device for a ground switch and a distribution box door, wherein the guide part moves along the guide hole.
According to claim 1,
The contact surface is,
a first contact surface;
An interlock device of a ground switch and a distribution box door, comprising a second contact surface formed parallel to the first contact surface.
According to claim 1,
The locking part,
A support portion coupled to one side of the distribution box;
a first plate capable of reciprocating along one side of the support portion and having a protrusion formed thereon that penetrates one side of the distribution box and contacts the door;
a second plate linked with the first plate and moved in a direction perpendicular to the first plate;
a spring disposed between the one side of the distribution box and the second plate, and pressing the second plate toward the one side of the distribution box; and
An interlock device for a ground switch and a distribution box door, comprising a locking portion formed on an outer peripheral surface of the shaft and having a locking groove formed in a shape corresponding to one end of the second plate.

Images