KR101765535B1 - Power Distributing Board with the cable connector to absorb earthquake - Google Patents

Abstract

The present invention relates to a power distribution board with a cable lead-in wire buffering device, the power distribution board which has the cable lead-in wire buffering device for reducing vibration of an earthquake and so on and impact applied from the outside and thus can protect a connection unit, connected to power equipment and a cable on the power distribution board. According to the present invention, the power distribution board comprises: a power distribution board box (10) which includes the power equipment installed therein; a cable (20) which has one side, connected to commercial power, and the other side, connected to the power distribution board, and supplies power; a cable tray (30) which is installed on a floor, a wall side, or a ceiling of facilities to support the cable for commercial power; and the cable lead-in wire buffering device (40) which is installed on an end portion of the cable tray, supports the power cable inserted in the power distribution board, and absorbs vibration or impact transmitted to the power cable. The power cable is mounted on an upper-end portion of the buffering device and reduces vibrations while moving along external vibrations. In addition, a seismic isolator (50) for reducing vibration or impact in vertical and horizontal directions is additionally arranged between the power distribution board box (10) and the floor.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a power distribution board having a cable penetration damper for earthquake,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a switchgear having a cable lead-in damper for earthquake, and more particularly to a switchgear having a cable lead-in damper for damping vibrations such as an earthquake or an external shock.

In particular, the cable lead-in shock absorber of the present invention is provided between a cable tray and a switchboard, and is capable of protecting a power facility in a switchboard and a connection portion connected to the power cable from vibration or impact.

The switchgear is a device that incorporates various power facilities such as transformers, breakers, converters, and bus bars, and supplies power to various electric devices installed in the facility by converting high voltage power supplied from power plants and substations to low pressure.

Since the switchgear is directly installed on the ground or installed in a factory or apartment building and operates 24 hours, it is easily exposed to external impacts such as earthquakes and is vulnerable to vibration due to the connection of power facilities with many contacts.

When vibration or shock is transmitted to the switchboard, the impact is transmitted to the cabinet of the switchgear, and the electric power equipment installed therein is damaged. Especially, the electric connection parts connected with the cables, bus bars, and power equipment are damaged, , Overcurrents, etc., can lead to a dangerous situation that may occur to the fire.

In recent years, large and small earthquakes have frequently occurred on the Korean Peninsula. Especially, strong earthquake that collapses the structures has occurred, so that it is important to secure the stability of the building structure. Especially, in case of the switchboard installed in the building, Has been strengthened compared to the past.

In the seismic design for protection of the switchboard, it is general to install a shock absorber using a spring or an impact absorbing member at the lower end of the enclosure to damp vibrations or shocks by moving the enclosure to the upper and lower sides. Such a conventional shock absorber can damp vibrations or shocks by moving the electric power equipment fixed inside the enclosure when an earthquake occurs. However, since the electric power cable connected to the electric power equipment can not be moved, The terminals of the electric power equipment connected to the power unit may be damaged due to strong stress due to vibration or impact.

Conventionally, a large number of seismic isolation devices have been developed. However, in order to protect the enclosure mainly from vertical vibration or horizontal vibration, a power cable for supplying electric power to the switchboard and a seismic device for absorbing vibration applied to the connection portion of the electric power facility This is relatively insufficient.

The prior art disclosed in Patent Document No. 10-1557099, which is a patent document relating to an anti-dusting panel, includes an earthquake-proof device at the end of a cable tray which is connected to an enclosure of an enclosure for supporting an external power source, The present invention provides a seismic isolation device capable of preventing a fire or an overload caused by a contact failure such as a short or an open that may occur in a conductive part. However, such a seismic isolation device can attenuate only a vibration between a cable tray and an enclosure, The vibration transmitted to the lead line can not be directly damped. In addition, there is a disadvantage in that the structure is complicated, and thus a large cost is required for manufacturing and installing the seismic resistant device.

Therefore, there is a need for a new seismic device that can protect the connection portion between the power cable and the power facility while protecting the cabinet from the external vibration, and which is low in manufacturing cost and installation cost.

Korean Registered Patent No. 10-1397804 (registered on May 14, 2014): Seismic isolation module for earthquake mitigation Korean Registered Patent No. 10-1557099 (Date of Registration: September 24, 2015): Power Distribution Board

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a power supply system capable of protecting a power facility in a switchboard and a connection unit connected to a power cable from vibrations or shocks by absorbing vibration, And which can attenuate vibrations more efficiently with a simple and simple structure.

In order to accomplish the above object, the present invention provides a switchboard comprising: an enclosure (10) having an electric power facility installed therein; a cable (20) connected to a commercial power source at one end and connected to the switchboard A cable tray (30) installed at the bottom, wall, or ceiling of the facility to support the cable, a power cable installed at the end of the cable tray to receive the cable for power input to the switchboard and absorbing vibration or shock transmitted to the cable And a cable lead-in shock absorber (40), wherein the power cable is seated on the upper end of the shock absorber and moves according to external vibration to attenuate the vibration.

The cable penetration line cushioning device 40 is composed of a vertical vibration absorbing means 41 made of a chemical material such as poly-silicon, polyurethane, or synthetic rubber and capable of absorbing vibration or impact as the outer shape is deformed .

The cable penetrating line cushioning device 40 may include a vertical vibration absorbing means 42 composed of several pieces and a spring 43 provided at the lower end of the vertical vibration absorbing means 42, The vibration absorbing means (42) is characterized in that vibration or shock is attenuated as the outer shape of the spring is deformed in response to the vibration or shock transmitted to the power cable.

In addition, a horizontal vibration absorbing means (LM guide) is provided at the lower end of the cable penetration line cushioning device 40, and the horizontal vibration absorbing means (LM guide) is moved in accordance with vibration or impact transmitted to the power cable, Thereby attenuating the impact.

Further, the present invention is characterized by further comprising an isolation device (50) between the switchgear housing (10) and the bottom surface to damp vibrations or shocks.

The switchboard provided in the present invention is equipped with a cable penetration damper to protect a power facility in a switchgear and a connection part connected to a power cable from vibrations such as an earthquake or external impacts, So that it is easy to manufacture and install at a low cost.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a switchboard with a cable lead-
2 is a conceptual diagram of a cable lead-in dampener according to the first embodiment of the present invention.
3 is a conceptual diagram of a cable lead-in dampener according to a second embodiment of the present invention.
4 and 5 show the coupling and the exploded views of the horizontal vibration absorbing means of the present invention
Fig. 6 is a perspective view of an electric distribution board having a conventional earthquake-

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. The embodiments described below are for illustrative purposes only and the present invention is not limited thereto and various changes, modifications, alterations, alterations, alterations, and equivalents may be made by those skilled in the art, It should be understood that it is possible.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. For example, the power equipment installed in the main body of the switchgear according to the present invention is a general configuration, and a detailed description thereof will be omitted.

6 shows a conventional earthquake-resistant switchboard. The earthquake-proof device 100 is connected to the cabinet 200 and terminates at a cable tray 120 supporting a power lead-in line 110 for supplying external power Discloses a feature that a fire or an overload can be prevented in advance due to a contact failure such as a short or an open which may occur in a conductive part of a power transmission / reception system due to vibration or shock caused by an earthquake.

However, such a conventional switchgear having a seismic isolation device can attenuate vibrations only between the cable tray and the cabinet, and can not directly damp vibrations transmitted to the power line. In addition, there is a disadvantage that the structure is complicated and a manufacturing cost and installation cost of an earthquake-proof apparatus are increased.

However, the switchboard comprising the cable pull-in shock absorber 40 of the present invention is equipped with a cable pull-in shock absorber for protecting the power pull-in line from vibrations or shocks caused by an earthquake or the like, And can be protected from vibration or shock caused by vibration.

To this end, as shown in FIG. 1, the switchboard including the cable pull-in shock absorber 40,

A switchgear housing (10) in which a powering device for exclusive use of the order is installed;

A power cable 20 connected to a commercial power source at one side and a power cable 20 connected to the other side of the switchgear housing 10 to supply electric power to the electric power facility;

 A cable tray 30 installed on a wall surface or a ceiling for supporting the power cable 20;

And a cable lead-in shock absorber (40) installed at the end of the cable tray (30) to support a cable for power drawn into the cabinet and absorb vibration or shock transmitted to a power cable.

The switchgear housing 10 is provided with an electric power supply device for exclusive use in the inside of the switchgear 10, and the power supply device for exclusive use of the electric power for the purpose of application provides electric power to various electric devices of the facility. Inside the housing 10 of the switchgear, Bar and the like, and a power cable 20 is connected to the power equipment to supply power received from a commercial power source.

The power cable 20 is supported and fixed by a cable tray 30 installed on a floor, a wall surface, or a ceiling of a facility, one side of the power cable 20 is connected to a commercial power source, 10 to supply electric power to the electric power facility.

In addition, the power cable 20 is supported on the upper end of the cable lead-in absorbing device 40, specifically, the vertical vibration absorbing device 42 while maintaining a certain curvature.

The reason why the power cable 20 is supported at the upper end of the cable lead-in dampener 40, specifically, the vertical vibration absorbing means 42 while maintaining a certain curvature is that the power cable 20 and the cable lead- More specifically, more surface contact with the vertical vibration absorbing means 42 is possible.

When the power cable 20 and the vertical vibration absorbing means 42 make a lot of surface contact, the vertical vibration absorbing means 42 can absorb the vibration or impact transmitted to the power cable 20 as much .

As a result, the power cable 20 is held at the upper end of the cable pull-in dampers 40, specifically, the vertical vibration absorbing means 42 while maintaining the predetermined curvature, Or the impact can be absorbed or attenuated by the vertical vibration absorbing means 42 more, so that the vibration transmitted to the power cable 20 due to an earthquake or the like and the shock damping effect are improved.

The cable tray 30 is installed on a wall or a ceiling to support a cable 20 for power drawn into the cabinet 10.

As shown in FIG. 1, at the end of the cable tray, a cable pull-in shock absorber 40 is installed to support a power cable to be introduced into a power transmission and transmission system, and at the same time, absorbs or attenuates vibrations or shocks caused by an earthquake, And the like.

2 or 3, the cable lead-in shock absorber 40 supports the power cable so that the power cable 20, which is normally drawn into the power and control panel, can maintain a certain curvature, It absorbs or attenuates the vibration or shock transmitted to the power cable.

Fig. 2 shows a first embodiment of the cable lead-in dampener 40 of the present invention, and Fig. 3 shows a second embodiment of the cable lead-in dampener 40 of the present invention.

As shown in FIG. 2, the first embodiment of the cable lead-in damping device 40 of the present invention,

A vertical vibration absorbing means 42 for primarily absorbing vibration or impact in a vertical direction that is stacked with at least one piece of the piece and transmitted to the power cable,

A buffer spring 43 connected at one side to the lower portion of the vertical vibration absorbing means 42 and connected at the other end to the spring support plate 44 to absorb vibration or impact in the vertical direction transmitted to the power cable, ,

And a spring support plate (44) connected to the buffer spring (43) and supporting the buffer spring (43).

The vertical vibration absorbing means 42 is for absorbing vibrations or shocks in the vertical direction transmitted to the power cable, and is stacked with one or more pieces.

In other words, the vertical vibration absorbing means 42 is formed by stacking at least one piece of slices formed in a slice shape, and absorbs vibration or impact in a vertical direction (Z direction in FIG. 2) transmitted to a power cable at the time of an earthquake Or attenuates the signal.

The pieces constituting the vertical vibration absorbing means 42 are formed of an elastic material such as polysilicon, polyurethane, or synthetic rubber.

The reason why the pieces are made of an elastic material is that vibrations or impacts in the vertical direction (Z direction in FIG. 2) are applied to the power cable at the time of an earthquake. At this time, Absorbing or attenuating vibration or shock in the vertical direction (Z direction in Fig. 2) applied to the cable.

The buffer spring 43 has one side connected to the lower portion of the vertical vibration absorbing means 42 and the other side connected to the spring supporting plate 44 to be driven in the vertical direction Absorbs shock.

That is, the buffer spring 43 absorbs or attenuates vibrations and shocks in the vertical direction (Z direction in FIG. 2) applied to the power cable while repeating compression and extension operations in the Z direction shown in FIG. 2

The spring support plate 44 serves to support the buffer spring 43 and is connected to one side of a buffer spring 43 for repeated compression and extension in the Z direction shown in FIG. 2, .

The spring support plate 44 is attached to a wall surface or a ceiling to support the buffer spring 43.

As a result, the vibration or impact in the vertical direction transmitted to the power cable is primarily absorbed or attenuated by the vertical vibration absorbing means 42, and subsequently absorbed or attenuated by the cushioning spring 43, The vibration or shock in the vertical direction transmitted to the power cable is absorbed or attenuated.

As shown in FIG. 3, the second embodiment of the cable penetrating line shock absorber 40 of the present invention is characterized in that the horizontal vibration absorbing means 41 is further included in the first embodiment.

That is, in the second embodiment of the cable lead-in dampener 40 of the present invention,

 A horizontal vibration absorbing means 41 coupled to the spring support plate 44 and absorbing horizontal vibration or shock transmitted to the power cable by sliding the vertical vibration absorbing means 42 and the buffer spring 43 in the horizontal direction, and,

A vertical vibration absorbing means 42 for primarily absorbing vibration or impact in a vertical direction that is stacked with at least one piece of the piece and transmitted to the power cable,

A buffer spring 43 connected at one side to the lower portion of the vertical vibration absorbing means 42 and connected at the other end to the spring support plate 44 to absorb vibration or impact in the vertical direction transmitted to the power cable, ,

And a spring support plate (44) connected to the buffer spring (43) and supporting the buffer spring (43).

Since the vertical vibration absorbing means 42, the buffer spring 43, and the spring support plate 44 have already been described in Embodiment 1, a detailed description thereof will be omitted and the horizontal vibration absorbing means 41 will be described in detail below .

The horizontal vibration absorbing means 41 is for absorbing or absorbing vibration in the horizontal direction (X, Y direction in FIG. 5) or shock transmitted to the power cable. As shown in FIGS. 4 and 5,

A pair of first guide rails 41a for guiding the vertical vibration absorbing means 42 and the buffer spring 43 to slide in one direction of the horizontal direction,

A pair of second guide rails 41b for guiding the vertical vibration absorbing means 42 and the buffer spring 43 to slide in a direction perpendicular to the one direction of the horizontal direction,

Is connected to the first guide rail 41a and the second guide rail 41b and moves horizontally along the first guide rail 41a or horizontally along the second guide rail 41b to be absorbed by the vertical vibration absorbing means And a plurality of bi-directional moving means 41c for sliding the buffer spring 43 and the buffer spring 43 in the horizontal direction,

And a spring support plate 44 is seated on the pair of second guide rails 41b.

5, the vertical vibration absorbing means 42 and the buffer spring 43 are slid in one direction (the X direction in FIG. 5) of the horizontal direction, and the first guide rails 41a are formed as a pair as shown in FIG. As well as to provide guidance.

That is, by vertically absorbing the vertical vibration absorbing means 42 and the buffer spring 43, which absorb vibration or impact in the vertical direction applied to the power cable by an earthquake or the like, in one direction (X direction in FIG. 5) As a result, it absorbs horizontal vibration or shock applied to the power cable.

5, the vertical vibration absorbing means 42 and the cushioning spring 43 are connected to the guide direction of the first guide rail 41a in the horizontal direction, (Y direction in Fig. 5).

That is, the vertical vibration absorbing means 42 and the buffer spring 43, which absorb vibrations or impact in the vertical direction applied to the power cable by an earthquake or the like, are perpendicular to the guiding direction of the first guide rail 41a in the horizontal direction (Y direction in FIG. 5), thereby absorbing horizontal vibration or shock applied to the power cable.

The spring support plate 44 is seated on the second guide rail 41b.

5, the bidirectional moving means 41c is connected to the first guide rail 41a and the second guide rail 41b and moves in the horizontal direction along the first guide rail 41a And moves horizontally along the second guide rail 41b to slide the vertical vibration absorbing means 42 and the buffer spring 43 in the horizontal direction.

Specifically, vibrations or shocks during an earthquake are applied to the power cable. The vibration or impact includes horizontal vibration or shock and vertical vibration or shock.

The vibration or shock in the vertical direction is absorbed or attenuated by the vertical vibration absorbing means 42 and the buffer spring 43 as described above.

In addition, the horizontal vibration or shock is absorbed or attenuated by the horizontal vibration absorbing means 41, and specific operating characteristics are as follows.

 A buffer spring 43 is connected to the spring support plate 44 and a vertical vibration absorbing means 42 is connected to the buffer spring. Accordingly, when the spring support plate 44 is moved in the horizontal direction (X, Y direction in FIG. 5), the vertical vibration absorbing means 42 and the buffer spring 43 also move in the horizontal direction.

When vibration or impact is applied to the power cable 20 due to an earthquake or the like in the horizontal direction, the spring support plate 44 moves in the horizontal direction due to the vibration or impact.

If the spring support plate 44 can not move in the horizontal direction, a contact failure such as a short or open occurs in the conductive parts of the power cable 20 and the switchgear housing 10 due to vibration or impact, Which leads to electrical accidents.

Therefore, when vibration or impact is applied to the power cable 20 due to an earthquake or the like, the spring support plate 44 should be moved in the horizontal direction to absorb vibration or shock in the horizontal direction.

For this purpose, the horizontal vibration absorbing means 41 is required.

A spring support plate 44 is seated on the second guide rail 41b, which is a component of the horizontal vibration absorbing means 41. [

The bidirectional moving means 41c is coupled to the second guide rail 41b so as to be slidable along the second guide rail 41b in a horizontal direction (Y direction in FIG. 5).

The bidirectional moving means 41c is coupled to the first guide rail 41a so as to be able to slide along the first guide rail 41a in a horizontal direction (X direction in FIG. 5).

Therefore, when vibration or impact in the horizontal direction is applied to the power cable 20 due to an earthquake or the like, the bidirectional moving means 41c moves in the horizontal direction (X direction in FIG. 5) along the first guide rail 41a The vertical vibration absorbing means 42 and the buffer spring 43 connected to the spring support plate 44 are horizontally slid in the horizontal direction (Y direction in FIG. 5) along the second guide rail 41b, The power cable 20 absorbs vibration or shock in the horizontal direction.

The present invention may further include an isolator 50 between the floor of the switchgear housing 10 and the floor.

The seismic isolation device 50 is a constituent means that can more effectively protect the power cable 20 and the housing 10 from vibration or external impact such as an earthquake and the seismic isolation device 50 is a cushion pad, A conventional vibration damping device known in the art may be used.

The foregoing description of exemplary embodiments of the present invention has been provided for purposes of illustration and description. It is to be understood that those skilled in the art can change or modify the embodiments without departing from the scope of the present invention. Various implementations are within the scope of the invention as defined in the claims. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: Switchboard enclosure 20: Power cable
30: Cable tray 40: Cable penetration buffer
50: Isolation device

Claims (7)

Claims [1] A switchboard with a cable entry damper for earthquake-proof vibration or shock transmitted to a power cable by an earthquake,
A switchgear housing (10) in which a powering device for exclusive use of the order is installed;
A power cable 20 connected to a commercial power source at one side and a power cable 20 connected to the other side of the switchgear housing 10 to supply electric power to the electric power facility;
A cable tray 30 installed on a wall surface or a ceiling for supporting the power cable 20;
And a cable penetrating line shock absorber (40) installed at an end of the cable tray (30) to support a cable for power drawn into the cabinet and absorb vibration or shock transmitted to the power cable,
The cable penetration line cushioning device (40)
A vertical vibration absorbing means 42 for primarily absorbing vibration or impact in a vertical direction that is stacked with at least one piece of the piece and transmitted to the power cable,
A buffer spring 43 connected at one side to the lower portion of the vertical vibration absorbing means 42 and connected at the other end to the spring support plate 44 to absorb vibration or impact in the vertical direction transmitted to the power cable, ,
And a spring support plate (44) connected to the buffer spring (43) and supporting the buffer spring (43).
delete The method according to claim 1,
The cable penetration line cushioning device (40)
A horizontal vibration absorbing means 41 which is coupled to the spring support plate 44 and absorbs horizontal vibration or impact transmitted to the power cable by sliding the vertical vibration absorbing means 42 and the buffer spring 43 in the horizontal direction, And a cable connecting part connected to the cable connecting part.
The method of claim 3,
The horizontal vibration absorbing means (41)
A pair of first guide rails 41a for guiding the vertical vibration absorbing means 42 and the buffer spring 43 to slide in one direction of the horizontal direction,
A pair of second guide rails 41b for guiding the vertical vibration absorbing means 42 and the buffer spring 43 to slide in a direction perpendicular to the one direction of the horizontal direction,
Is connected to the first guide rail 41a and the second guide rail 41b and moves horizontally along the first guide rail 41a or horizontally along the second guide rail 41b to be absorbed by the vertical vibration absorbing means And a plurality of bi-directional moving means 41c for sliding the buffer spring 43 and the buffer spring 43 in the horizontal direction,
And a spring support plate (44) is seated on the pair of second guide rails (41b). ≪ IMAGE > The method according to any one of claims 1, 3, and 4,
Characterized in that the pieces constituting the vertical vibration absorbing means (42) are elastic materials capable of absorbing vibrations or shocks.

The method according to any one of claims 1, 3, and 4,
Wherein the power cable (20) is seated and supported at an upper end of the cable penetration line shock absorber (40) while maintaining a predetermined curvature.
The method according to claim 1,
Further comprising an isolation device (50) for damping vibrations or shocks in the vertical and horizontal directions between the floor of the switchgear housing (10) and the bottom surface of the switchgear housing (10).

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