KR102658212B1 - Distribution board having earthquake-proof apparatus - Google Patents

Abstract

The present invention relates to an anti-falling earthquake-resistant switchboard equipped with an operating switch that can absorb shock acting on the switchboard when vibration such as an earthquake occurs and prevent the switch from falling over.
In particular, the present invention is characterized in that shock is absorbed by a buffer spring in response to a small external force, and the cylinder rises to firmly support the main body in response to a large external force, thereby preventing the main body of the switchgear from falling.

Description

Anti-falling earthquake-resistant switchboard equipped with operation switch { DISTRIBUTION BOARD HAVING EARTHQUAKE-PROOF APPARATUS }

The present invention relates to a fall-prevention earthquake-resistant switchboard equipped with an operation switch, and in particular to an anti-tumble earthquake-resistant switchboard equipped with an operation switch capable of absorbing shocks acting on the switchboard in the event of vibration such as an earthquake and preventing it from falling into the switchboard. will be.

In general, a switchboard is an electrical facility that safely supplies industrial power to users, and is a device used to monitor, control, and protect the electric system when receiving and distributing power sent from a power plant or substation to consumers.

This type of switchboard is composed of a structure that attaches and supports unit devices such as circuit breakers and protection relays, and a collection of conductors that connect and connect the unit devices. It is a product in which these various electrical devices are safely insulated and housed in a rectangular steel enclosure. .

However, since the switchboard is fixedly installed on the ground, when an earthquake occurs, the vibration of seismic waves may cause deformation of the enclosure provided in the switchboard, damage various electrical devices installed inside the switchboard, and in severe cases, the switchboard may fall over. there was.

In this case, there is a problem that power cannot be stably supplied to places where power is needed, and problems such as electric shock may occur due to electric leakage.

To solve this problem, recently, a lower buffer member has been installed at the bottom of the switchboard to attenuate and buffer external forces such as earthquakes.

However, a switchboard equipped with a conventional lower shock absorber is effective against small vibrations, but when an earthquake with relatively large vibration occurs, the switchboard body flows rather than the spring-loaded lower shock member absorbing the shock. There was a problem with the switchboard body falling over.

Registered Patent 10-1808692 Registered Patent 10-1889304

The present invention is intended to solve the above-mentioned problem, and provides an operating switch that can prevent a falling accident of the switchgear body by suppressing the action of the lower shock absorbing member including the spring when an earthquake of relatively large vibration occurs. The purpose is to provide a built-in fall-proof earthquake-resistant switchboard.

In order to achieve the above object, an anti-falling earthquake-resistant switchboard equipped with an operating switch of the present invention includes a main body of the switchboard; a plurality of lower buffer members mounted on the lower part of the main body to separate the lower surface of the main body from the ground and buffer external forces; a pump that supplies air to the interior of the lower buffer member to expand and contract the lower buffer member in the vertical direction; a discharge valve that discharges air supplied to the lower buffer member to the outside; a control unit that controls the pump and discharge valve; A vibration sensor mounted on the main body or the lower shock absorbing member to detect vibration, wherein the lower shock absorbing member includes: an upper support coupled to the lower part of the main body; a lower supporter disposed spaced apart from a lower portion of the upper supporter; a buffer spring inserted into the upper and lower supports to elastically support the switchboard in a vertical direction; a cylinder arranged to be flexible in the vertical direction between the upper support and the lower support; An operating switch mounted on the cylinder and activated when the distance between the cylinder and the upper support becomes closer, wherein the pump supplies air to the inside of the cylinder to expand and contract the cylinder in the vertical direction, The discharge valve discharges the air supplied to the cylinder to the outside, and the control unit operates the pump when the operation switch is turned on as the distance between the cylinder and the upper support becomes closer due to the action of an external force. By supplying air to the cylinder to expand the cylinder, the upper part of the cylinder is supported by contacting the lower surface of the upper support, and when the measured value from the vibration sensor is less than a preset standard value, the discharge valve is opened to allow the cylinder to By discharging the air to the outside, the cylinder is contracted to its original state and the operation switch is turned off.

The cylinder includes a housing; a piston disposed within the housing to be movable in an upward and downward direction; a support head coupled to the top of the piston at the top of the housing; and an expansion tube disposed below the piston inside the housing and connected to the pump, wherein when air is supplied from the pump to the expansion tube, the expansion tube expands and moves the piston and the support head upward. The support head is moved in this direction and supported with its upper surface in contact with the lower surface of the upper support.

The operation switch is mounted on the upper surface of the housing below the support head, and when the upper support and the support head collide due to an external force, the support head descends and turns on the operation switch.

The cylinder further includes an air cushioning pad disposed on the upper surface of the support head, wherein a through hole is formed in the piston in a vertical direction, the lower part of the through hole communicates with the expansion tube, and the upper part of the through hole communicates with the expansion tube. It communicates with the air buffer pad, and the air supplied from the pump is supplied to the air buffer pad through the expansion tube and through hole to expand the air buffer pad, and when the support head rises, the air buffer pad is inflated to the upper part. It absorbs shock as it touches the bottom of the support.

The cylinder further includes a check valve mounted on the lower part of the piston to open and close communication between the through hole and the expansion tube, wherein the check valve is hollow and has one end at the lower part of the piston. A fixing member that is coupled and communicates with the through hole on the inside and has an opening and closing hole at the other end; a contact rod disposed to be movable in the vertical direction while passing through the opening/closing hole, one end of which is disposed inside the fixing member, and the other end disposed outside the fixing member to form a close contact portion; and an opening and closing spring disposed between the other end of the fixing member and the close contact portion. The opening and closing hole is spaced apart from the other end and communicates with the inside of the expansion tube, and when the pressure inside the expansion tube exceeds a preset constant pressure value, the contact rod compresses the opening and closing spring by the pressure pushing the contact part. By moving in the direction indicated, the contact portion comes into close contact with the other end of the fixing member, thereby blocking communication between the opening and closing hole and the interior of the expansion tube.

According to the fall-prevention earthquake-resistant switchboard equipped with the operation switch of the present invention as described above, the following effects are achieved.

In the present invention, shock is absorbed by the buffer spring in response to a small external force, and the cylinder rises to firmly support the main body in response to a large external force, thereby preventing the main body from falling.

1 is a structural diagram of a fall-prevention earthquake-resistant switchboard according to an embodiment of the present invention;
Figure 2 is a structural diagram of a lower buffer member according to an embodiment of the present invention;
Figure 3 is an operation process diagram showing the process of injecting air into the cylinder of the lower shock absorber according to an embodiment of the present invention;
Figure 4 is an operation process diagram showing the state in which the check valve is closed and the piston is raised in Figure 3;
Figure 5 is an operation process diagram showing the process of shrinking the cylinder of the lower shock absorber according to an embodiment of the present invention.

As shown in Figures 1 and 2, the fall-prevention earthquake-resistant switchboard equipped with the operating switch of the present invention includes a main body 10, a lower buffer member 20, a pump 30, and a discharge valve 40. It includes a control unit 50 and a vibration sensor 61.

The main body 10 forms the external shape of the switchboard and is generally shaped like a rectangular parallelepiped.

A plurality of lower buffer members 20 are mounted on the lower part of the main body 10 to separate the lower surface of the main body 10 from the ground and serve to buffer external forces.

The pump 30 supplies air to the inside of the lower cushioning member 20 to expand and contract the lower cushioning member 20 in the vertical direction.

The discharge valve 40 discharges the air supplied to the lower buffer member 20 to the outside.

The control unit 50 controls the pump 30 and the discharge valve 40.

The vibration sensor 61 is mounted on the main body 10 or the lower shock absorbing member 20 and detects vibration.

In the present invention, the lower shock absorbing member 20 includes an upper support 21, a lower support 22, a shock absorbing spring 23, a cylinder 24, and an operating switch 62.

The upper support 21 is coupled to the lower part of the main body 10.

The lower support 22 is disposed spaced apart from the lower part of the upper support 21.

The buffer spring 23 is inserted into the upper support 21 and the lower support 22 to elastically support the switchboard in the vertical direction.

The cylinder 24 is arranged to be flexible in the vertical direction between the upper support 21 and the lower support 22.

In a free state, the upper part of the cylinder 24 is spaced apart from the lower surface of the upper support 21, and the lower part is fixedly coupled to the upper surface of the lower support 22.

The cylinder 24 does not operate when external force such as an earthquake does not act or acts weakly, but when the external force operates greater than a preset standard value, it rises and comes into contact with the lower surface of the upper support 21. .

As the upper surface of the cylinder 24 comes into contact with the upper surface of the upper support 21 as above, it is possible to prevent the switchboard main body 10 from shaking greatly and overturning when a large vibration occurs.

The operating switch 62 is mounted on the cylinder 24 and is activated when the distance between the cylinder 24 and the upper support 21 becomes closer.

The operating switch 62 may have various switch structures including a limit switch.

The pump 30 supplies air to the inside of the cylinder 24 to expand and contract the cylinder 24 in the vertical direction.

And, the discharge valve 40 discharges the air supplied to the cylinder 24 to the outside.

The control unit 50 operates the pump 30 when the distance between the cylinder 24 and the upper support 21 becomes closer due to the action of an external force and the operation switch 62 is turned on. By supplying air to the cylinder 24 to expand the cylinder 24, the upper part of the cylinder 24 is supported in contact with the lower surface of the upper support 21.

And, if the measurement value measured by the vibration sensor 61 is less than a preset reference value, the control unit 50 opens the discharge valve 40 to discharge the air in the cylinder 24 to the outside. The cylinder 24 is retracted to its original state and the operation switch 62 is turned off.

The cylinder 24 for performing the above operation includes a housing 241, a piston 242, a support head 243, and an expansion tube 244.

The housing 241 has a hollow shape, and its lower surface is fixedly coupled to the lower support 22.

The piston 242 is disposed to be movable in the vertical direction within the housing 241.

The support head 243 is coupled to the top of the piston 242 at the outer top of the housing 241.

The support head 243 is shaped like a wide flat plate.

The expansion tube 244 is disposed below the piston 242 inside the housing 241 and is connected to the pump 30.

When air is supplied from the pump 30 to the expansion tube 244, the expansion tube 244 expands and moves the piston 242 and the support head 243 upward, and the support head 243 rises. ) is supported with its upper surface in contact with the lower surface of the upper support 21.

The operation switch 62 is mounted on the upper surface of the housing 241 from the lower part of the support head 243.

Therefore, when the upper support 21 and the support head 243 collide due to a large external force, the support head 243 descends and turns on the operation switch 62.

The cylinder 24 may further include an air buffering pad 245 disposed on the upper surface of the support head 243.

When the cylinder 24 is extended to support the lower surface of the upper support 21, the air buffer pad 245 contacts the lower support 22 and absorbs the impact force transmitted to the upper support 21. This minimizes the transmission of vibration.

The air buffer pad 245 may have air injected into it from the beginning, or it may be supplied through the expansion tube 244 as in this embodiment.

In order to allow air to be injected into the air buffer pad 245 through the expansion tube 244, a through hole 242a is formed in the up and down direction in the piston 242, and the through hole 242a is formed in the lower part. Communicates with the expansion tube 244 and the upper portion communicates with the air buffer pad 245.

The air supplied from the pump 30 is supplied to the air buffering pad 245 through the expansion tube 244 and the through hole 242a to expand the air buffering pad 245, and the support head 243 ) When rising, the air cushioning pad 245 contacts the lower surface of the upper support 21 and absorbs shock.

Additionally, the cylinder 24 may further include a check valve 246.

The check valve 246 is mounted on the lower part of the piston 242 and opens and closes communication between the through hole 242a and the expansion tube 244.

The check valve 246 includes a fixing member 246a, a contact rod 246c, and an opening/closing spring 246e.

The fixing member 246a has a hollow shape, one end of which is coupled to the lower part of the piston 242, the inside of which communicates with the through hole 242a, and an opening and closing hole 246b is formed at the other end.

The contact rod 246c is arranged to be movable in the vertical direction while penetrating the opening/closing hole 246b, one end is disposed inside the fixing member 246a, and the other end is outside the fixing member 246a. As it is placed, a close contact portion 246d is formed.

The close contact portion 246d formed at the other end of the close contact rod 246c has a large area.

The opening/closing spring 246e is disposed between the other end of the fixing member 246a and the close contact portion 246d, and elastically supports the close contact portion 246d in a direction away from the fixing member 246a.

With this structure, when the pressure inside the expansion tube 244 is below a preset constant pressure value, the close contact portion 246d is spaced apart from the other end of the fixing member 246a by the elastic force of the opening and closing spring 246e. Thus, the opening/closing hole (246b) communicates with the inside of the expansion tube (244).

And, when the pressure inside the expansion tube 244 exceeds a preset constant pressure value, the close contact rod 246c is opened and closed by the pressure pushing the close contact portion 246d inside the expansion tube 244. By moving in the direction of compressing (246e), the close contact portion (246d) comes into close contact with the other end of the fixing member (246a), thereby blocking communication between the opening and closing hole (246b) and the inside of the expansion tube (244).

Hereinafter, we will look at the operating process of the present invention consisting of the above-described configuration.

When vibration or external force such as a small earthquake acts, the vibration transmitted from the ground to the main body 10 is absorbed by the elastic force of the buffer spring 23.

When a relatively large external force is applied due to a large earthquake, etc., the buffer spring 23 is severely compressed and deformed, as shown in FIG. 3(a), and the upper support 21 and the support head 243 are damaged. At this time, the support head 243 moves downward due to the impact applied to the support head 243 and the operation switch 62 is pressed to turn it on.

When the operation switch 62 is turned on as above, the control unit 50 operates the pump 30 to supply air to the expansion tube 244, as shown in FIG. 3(b).

At this time, the through hole 242a of the fixing member 246a constituting the check valve 246 is not in close contact with the close contact portion 246d due to the elastic force of the opening and closing spring 246e, and the expansion tube 244 ) is in a state of communication with the interior.

Accordingly, the air supplied to the expansion tube 244 is supplied to the air buffering pad 245 through the through hole 242a and expands the air buffering pad 245 to absorb shock and vibration.

If air continues to be supplied to the expansion tube 244, the expansion tube 244 expands and its internal pressure increases. At this time, when the pressure inside the expansion tube 244 exceeds a preset constant pressure value, Figure 4 As shown in (a), by the pressure pushing the close contact portion 246d, the close contact rod 246c moves in the direction of compressing the opening and closing spring 246e, so that the close contact portion 246d is connected to the fixing member ( It is in close contact with the other end of 246a), and communication between the opening and closing hole 246b and the inside of the expansion tube 244 is blocked.

Therefore, as shown in FIG. 4(b), high-pressure air is no longer supplied to the air buffer pad 245, and the expansion tube 244 expands.

As the expansion tube 244 expands, the piston 242 rises, and as a result, the air buffer pad 245 coupled to the upper surface of the support head 243 is connected to the lower surface of the upper support 21. While in contact, it stably supports the upper support 21 and at the same time performs a buffering function.

When the cylinder 24 is extended as described above, the cylinder 24 firmly supports the main body 10 at a certain height without shaking, thereby preventing the main body 10 from falling.

When the external force that was acting large decreases or disappears, the upper support 21 rises due to the elastic force of the buffer spring 23, as shown in Figure 5(a), and the vibration sensor 61 measures it. The measured value falls below the preset standard value.

At this time, since there is no need for the cylinder 24 to support the lower part of the main body 10, the control unit 50 opens the discharge valve 40 as shown in FIG. 5(b) to allow the expansion. The air injected into the tube 244 is discharged to the outside.

As the air inside the expansion tube 244 is discharged to the outside, the pressure inside the expansion tube 244 decreases. At this time, when the pressure inside the expansion tube 244 falls below a preset constant pressure value, the opening and closing Due to the elastic force of the spring 246e, the close contact portion 246d is spaced apart from the other end of the fixing member 246a, and the opening/closing hole 246b communicates with the inside of the expansion tube 244.

Accordingly, the air supplied to the air buffering pad 245 is discharged to the outside, and the air buffering pad 245 also contracts.

As the expansion tube 244 contracts, the piston 242 descends and is restored to its original position.

Then, the control unit 50 turns off the operation switch 62.

With the above structure, the present invention absorbs shock by the buffer spring 23 for small external forces, and the cylinder 24 rises to firmly support the main body 10 in case of large external forces. 10) can prevent conduction.

The fall-prevention earthquake-resistant switchboard equipped with the operating switch of the present invention is not limited to the above-described embodiments, and can be implemented with various modifications within the scope of the technical spirit of the present invention.

10: main body,
20: lower buffer member,
21: upper support, 22: lower support, 23: buffer spring,
24: cylinder, 241: housing, 242: piston, 242a: through hole, 243: support head, 244: expansion tube, 245: air buffer pad, 246: check valve, 246a: fixing member, 246b: opening and closing hole, 246c: Adhesion rod, 246d: Adhesion part, 246e: Opening/closing spring,
30: pump,
40: discharge valve,
50: control unit,
61: Vibration sensor, 62: Operation switch.

Claims (5)

The main body of the switchboard;
a plurality of lower buffer members mounted on the lower part of the main body to separate the lower surface of the main body from the ground and buffer external forces;
a pump that supplies air to the interior of the lower buffer member to expand and contract the lower buffer member in the vertical direction;
a discharge valve that discharges air supplied to the lower buffer member to the outside;
a control unit that controls the pump and discharge valve;
A vibration sensor mounted on the main body or lower shock absorbing member to detect vibration,
The lower buffer member,
an upper support coupled to the lower part of the main body;
a lower supporter disposed spaced apart from a lower portion of the upper supporter;
a buffer spring inserted into the upper and lower supports to elastically support the switchboard in a vertical direction;
a cylinder arranged to be flexible in the vertical direction between the upper support and the lower support;
It includes an operating switch mounted on the cylinder and activated when the distance between the cylinder and the upper support becomes closer,
The pump supplies air to the inside of the cylinder to expand and contract the cylinder in the vertical direction,
The discharge valve discharges the air supplied to the cylinder to the outside,
The control unit,
When the distance between the cylinder and the upper support becomes closer due to the action of an external force and the operation switch is turned on, the pump is operated to supply air to the cylinder to expand the cylinder, so that the upper part of the cylinder is connected to the upper support. Support it by contacting the lower surface of the
If the measurement value measured by the vibration sensor is less than a preset reference value, the discharge valve is opened to discharge the air in the cylinder to the outside, thereby shrinking the cylinder to its original state and turning off the operation switch,
The cylinder is,
housing;
a piston disposed within the housing to be movable in an upward and downward direction;
a support head coupled to the top of the piston at the top of the housing;
An expansion tube disposed below the piston inside the housing and connected to the pump,
When air is supplied from the pump to the expansion tube, the expansion tube expands and moves the piston and support head upward,
The raised support head supports the upper surface in contact with the lower surface of the upper support,
The operating switch is mounted on the upper surface of the housing from the lower part of the support head,
When the upper support and the support head collide due to an external force, the support head descends and turns on the operation switch,
The cylinder is,
It further includes an air buffering pad disposed on the upper surface of the support head,
The piston has a through hole formed in the vertical direction,
The lower part of the through hole communicates with the expansion tube and the upper part communicates with the air buffer pad,
The air supplied from the pump is supplied to the air buffering pad through the expansion tube and through hole to expand the air buffering pad, and when the support head rises, the air buffering pad contacts the lower surface of the upper support and causes shock. An anti-fall earthquake-resistant switchboard equipped with an operation switch, characterized in that it absorbs. delete delete delete In claim 1,
The cylinder is,
It further includes a check valve mounted on the lower part of the piston to open and close communication between the through hole and the expansion tube,
The check valve is,
a fixing member that has a hollow shape, one end of which is coupled to the lower part of the piston, the interior of which communicates with the through hole, and an opening and closing hole formed at the other end;
a contact rod disposed to be movable in the vertical direction while penetrating the opening/closing hole, one end of which is disposed inside the fixing member, and the other end disposed outside the fixing member to form a close contact portion;
It includes an opening and closing spring disposed between the other end of the fixing member and the close contact portion,
When the pressure inside the expansion tube is below a preset constant pressure value, the close contact portion is spaced from the other end of the fixing member by the elastic force of the opening and closing spring, and the opening and closing hole communicates with the interior of the expansion tube,
When the pressure inside the expansion tube exceeds a preset constant pressure value, the contact rod moves in a direction to compress the opening and closing spring by the pressure pushing the close contact portion, and the close contact portion comes into close contact with the other end of the fixing member to open and close the close contact portion. An anti-fall earthquake-resistant switchboard equipped with an operating switch, characterized in that communication between the ball and the inside of the expansion tube is blocked.

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