KR20170057547A - Vibration Proofing Device - Google Patents

Vibration Proofing Device Download PDF

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Publication number
KR20170057547A
KR20170057547A KR1020150160807A KR20150160807A KR20170057547A KR 20170057547 A KR20170057547 A KR 20170057547A KR 1020150160807 A KR1020150160807 A KR 1020150160807A KR 20150160807 A KR20150160807 A KR 20150160807A KR 20170057547 A KR20170057547 A KR 20170057547A
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KR
South Korea
Prior art keywords
support plate
plate
elastic
vibration
support
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KR1020150160807A
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Korean (ko)
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KR101794668B1 (en
Inventor
박기주
김임배
지영재
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주식회사 라온테크
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Priority to KR1020150160807A priority Critical patent/KR101794668B1/en
Publication of KR20170057547A publication Critical patent/KR20170057547A/en
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Publication of KR101794668B1 publication Critical patent/KR101794668B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
    • E04H9/022—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising laminated structures of alternating elastomeric and rigid layers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • F16F15/046—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means using combinations of springs of different kinds
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/54—Anti-seismic devices or installations

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Environmental & Geological Engineering (AREA)
  • Power Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Vibration Prevention Devices (AREA)
  • Patch Boards (AREA)

Abstract

The present invention provides an anti-vibration device, including: a first support plate; a second support plate separate from the first support plate and supporting a lower portion of a structure; an anti-vibration spring interposed in a central portion where the first support plate and the second support plate face so as to reduce the vertical transmission of vibrations; and an elastic support connecting a plurality of outer circumferential surfaces of the first support plate and the second support plate by a predetermined interval so as to maintain the interval between the first support plate and the second support plate, as well as reducing the horizontal or vertical transmission of vibrations. Accordingly, the present invention can minimize the direct transmission of vibrations generated by external force, such as an earthquake, to a structure e.g., a distribution board, as well as preventing the structure from falling down when losing the balance by the external force.

Description

{Vibration Proofing Device}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration device, and more particularly, to an anti-vibration device capable of minimizing direct transmission of vibration generated by an external force such as an earthquake to a structure such as a switchboard, a distribution panel or a solar power generator.

In general, the switchgear is responsible for receiving power from the power supplier and supplying power to the equipment requiring power consumption, and has installed related facilities of a conventional power transformer room equipped with a power receiving facility and a power distribution facility in the internal accommodation space .

For example, in the interior of the above-mentioned power plant, there are a power receiving facility receiving electricity from KEPCO, a transformer supplying power supplied through the power receiving facility to a voltage or capacity required by the user, And a breaker to protect the entire plant from accidents.

In consideration of the safety of electric shock and fire in the process of use, the switchboard used in this case is an insulated main body having a switchgear door for restricting direct contact with the outside and for inspecting or maintaining the inside of the switchgear, In consideration of reliability against a supply voltage, various protective devices such as a circuit breaker and a lightning arrester are installed in the main body as essential requirements.

The switchgear also includes VCB, VCS, VC, ACB, MCCB, PCB and reactor, inverter, capacitor, measurement control module, SMPS, EMI filter and transformer to supply power.

In addition, the above-mentioned switchgear includes an input unit for outputting a DC current generated from the outside in a serial connection manner, an output unit connected in series to the input unit for outputting a DC current outputted from the input unit to the inverter, And a control unit for detecting and monitoring.

Such a conventional technology relating to a switchboard is described in detail in a registration application No. 20-0457648 entitled "Wiring for a Switchboard ".

However, the conventional switchgear is either provided with a vibration-proofing system corresponding to the vibration applied in either the vertical direction or the horizontal direction from the installation surface, or the vibration-proofing facility is continuously exposed to the load, Problems are pointed out.

In addition, when the dustproof equipment is out of the allowable range, there is a problem that the structure such as the power storage cabin that is supported while the dustproof equipment collapses occurs.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems and it is an object of the present invention to minimize vibration transmitted by an external force such as an earthquake directly to a structure such as a switchboard, And an object of the present invention is to provide an anti-vibration device that can prevent dust.

According to an aspect of the present invention, A second support plate spaced apart from the first support plate and supporting a bottom surface of the structure; A vibration-proof spring interposed between the first support plate and the second support plate to reduce transmission of vibration in a vertical direction, and a plurality of outer circumferential surfaces of the first support plate and the second support plate at a predetermined interval, 1 is a perspective view of a vibration damping device according to a first embodiment of the present invention;

The vibration damping device includes a first fixing plate coupled to a lower surface of the first supporting plate and fixed to an installation surface, and a cylindrical first shielding plate protruding from the first fixing plate to surround the elastic supporting portion. A second fixing plate coupled to an upper portion of the second supporting plate and fixed to a bottom surface of the structure, and a cylindrical second shielding plate protruding from the second fixing plate and inserted into the first cover portion And the second cover portion.

The second shield plate may include a first guide groove formed at a position corresponding to the position of the elastic supports so as not to interfere with the elastic supports.

The first and second support plates may have a first and a second guide groove formed on the inner circumferential surface of the first shield plate so as to restrict the extent of the elastic support members protruding from the first guide plate, And an elastic pad interposed between the outer circumferential surfaces of the second shielding plate and contacting the protruding portion of the elastic supporting portion.

The second guide groove may be formed in the elastic pad so that the elastic support portion is inserted while being in contact with the position where the guide groove is formed.

The height of the first shielding plate or the second shielding plate is formed to be at least smaller than the height between the first support plate and the second support plate when the vibration-proof spring or the elastic support portion is compressed to the maximum, The inner circumferential surface of the first shielding plate and the outer circumferential surface of the second shielding plate may be formed to contact each other at least when they are pulled.

The dustproof device is screwed so as to be able to linearly reciprocate in a vertical direction on a fixing hole formed at the center of the second fixing plate, and one end thereof contacts the upper surface of the second supporting plate, And an adjusting unit adjusting the elastic force of the anti-vibration spring or the elastic supporting unit by adjusting the fixing height.

Wherein the first support plate and the second support plate are deformed in shape when the one of the first support plate and the second support plate is compressed and the elastic support part coupled to one side of the first support plate and the second support plate is compressed, 2 When the other side of the support plate is pulled, the first support plate and the elastic support unit coupled to the other side of the second support plate can be prevented from collapsing while maintaining the shape without being stretched have.

According to the dustproof device of the present invention,

First, vibration can be prevented from being directly transmitted on the installation surface on which the structure is installed,

Second, vibration can be prevented from being transmitted through the vibration-proof spring and the elastic supporting portion corresponding to an external force in the horizontal direction as well as in the vertical direction,

Third, when the external force is out of the permissible range, the structure can be prevented from falling over or falling off from the mounting surface through the elastic supporting portion,

Fourth, the horizontal position of the structure can be adjusted by adjusting the joining position of the adjustment part,

Fifth, it is possible to apply the present invention to various structures such as a distribution panel, a motor control panel, a photovoltaic power generation device, an inverter, and a connection panel as well as a transmission and reception panel by using an anti-vibration device.

FIG. 1 is a front view showing a switchboard in which an anti-vibration device according to an embodiment of the present invention is installed.
Fig. 2 is a cross-sectional view showing the anti-vibration device shown in Fig. 1 in front view.
Fig. 3 is an exploded view showing the anti-vibration device shown in Fig. 2. Fig.
4 is a reference view showing a state in which the dustproof device shown in Fig. 2 is compressed in the vertical direction.
Fig. 5 is a reference view showing a state in which the dustproof device shown in Fig. 2 is compressed in the vertical or horizontal direction.
Fig. 6 is a reference view showing a state in which the adjustment portion of the vibration damping device shown in Fig. 2 is adjusted.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. It should be noted that the drawings denoted by the same reference numerals in the drawings denote the same reference numerals whenever possible, in other drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. And certain features shown in the drawings are to be enlarged or reduced or simplified for ease of explanation, and the drawings and their components are not necessarily drawn to scale. However, those skilled in the art will readily understand these details.

FIG. 1 is a front view showing a switchboard in which an anti-vibration device according to an embodiment of the present invention is installed. Hereinafter, a description will be given of a switchboard 1 equipped with an anti-vibration device, and the structure supported on the anti-vibration device may be applied to a panel board, a motor control panel, a solar power generator, an inverter,

Referring to FIG. 1, an anti-vibration device 100 according to an embodiment of the present invention is installed at a lower portion of a structure such as the switchboard 1. An inverter module (not shown), a water distribution module (not shown) and a transformer module (not shown) are installed inside the switchboard 1. The dustproof device 100 is coupled to a lower portion of the enclosure main body 10 to support the enclosure main body 10 from an installation surface and to prevent vibration from being transmitted to the enclosure main body 10 from an external force such as an earthquake, .

The outer shape of the enclosure main body 10 is formed in a substantially rectangular parallelepiped shape, and an accommodating space (not shown) separated by one or a plurality of partition walls (not shown) so that the inverter module, the water distribution module, Is formed. Here, the switchboard 1 will be described as an example of a structure. In addition, the switchboard, the switchboard, the motor control panel (MCC), and the like may be applied as other examples of the structure.

In addition, although not shown in the drawings, components such as a PCB, a circuit breaker, a lightning arrester, a fuse, an opening and closing device, and the like can be additionally provided in the receiving space.

A door (12) is provided on one side of the enclosure body (10) to selectively open and close the accommodation space.

One or a plurality of the doors 12 may be provided so as to open or close the accommodating space in whole or in part, and the inverter module, the water distribution module, and the transformer are installed or maintained through the door 12 .

The door 12 may be formed as a hinged or sliding door structure, and the door 12 is installed in the hinged door 1 according to the present invention as an example.

The vibration damping device 100 has a function of preventing the vibration generated from any one side of the enclosure main body 10 or the mounting surface from being transmitted to the other side, and a detailed description will be given later.

Fig. 2 is a cross-sectional view showing the dustproofing device shown in Fig. 1, and Fig. 3 is an exploded view showing the dustproofing device shown in Fig. FIG. 5 is a reference view showing a state in which the vibration isolation device shown in FIG. 2 is compressed in the vertical or horizontal direction, and FIG. 6 is a view showing a state in which the adjustment portion of the vibration isolation device shown in FIG. 2 is adjusted It is a reference diagram. It is needless to say that the vibration damping apparatus 100 may be installed in the electric power distribution board 1 as well as installed in the lower part of the distribution board or the motor control board.

2 to 6, the anti-vibration device 100 includes a first support plate 110, a second support plate 120 spaced apart from the first support plate 110 and supporting a bottom surface of the structure, A vibration damper 130 interposed between the first support plate 110 and the second support plate 120 so as to reduce transmission of vibration in a vertical direction and an outer peripheral surface of the first support plate 110, A plurality of outer circumferential surfaces of the first support plate 110 and the second support plate 120 are connected to each other at a predetermined interval to maintain a space between the first support plate 110 and the second support plate 120, A first fixing plate 151 coupled to a lower portion of the first supporting plate 110 and fixed to a mounting surface of the first supporting plate 110 and a second fixing plate 151 protruding from the first fixing plate 151 to surround the elastic supporting portion 140, A first cover portion 150 having a first shielding plate 153 of a shape similar to that of the first support plate 120, A second fixing plate 161 coupled to the top of the structure and fixed to the bottom of the structure and a cylindrical second shielding plate 162 protruding from the second fixing plate 161 and inserted into the first cover portion 150 And an elastic pad 170 inserted in the first shielding plate 153 and selectively disposed in contact with the elastic supporting portion 140. The elastic cover 170 may be formed of a synthetic resin.

Here, the first support plate 110 and the second support plate 120 prevent vibrations from being transmitted from one side to the other, and conversely, transmission of vibration from the other side to the one side can be prevented.

The first support plate 110 is installed on the first fixing plate 151 and the first fixing plate 151 is installed on the mounting surface. The mounting surface may be another structure fixed to the ground or the ground. At this time, an installation groove 152 may be formed in the first fixing plate 151 so that the first supporting plate 110 can be installed. The installation groove 152 prevents the first support plate 110 from being separated from the first support plate 110 in the horizontal direction and facilitates the installation of the first support plate 110 to provide. A first coupling protrusion 111 is formed on the upper portion of the first support plate 110 so that the vibration springs 130 can be inserted and fixed.

The second support plate 120 is disposed on the upper portion of the first support plate 110 and supports the bottom surface of the structure. The upper surface of the second support plate 120 contacts the inner bottom surface of the second fixing plate 161 to elastically support the second fixing plate 161 to support the structure. A second coupling protrusion 121 is formed at a lower portion of the second support plate 120 so that the vibration springs 130 can be inserted and fixed.

4, the anti-vibration spring 130 provides elastic restoring force between the first support plate 110 and the second support plate 120 in the vertical direction. Therefore, the structure coupled to the upper portion of the second fixing plate 161 is elastically disposed on the mounting surface by the elastic restoring force to absorb vibration. Also, the anti-vibration spring 130 can provide a predetermined restoring force against an external force generated in the horizontal direction.

5, the elastic supporting part 140 may provide an elastic restoring force in a vertical direction together with the vibration-proof spring 130, and may be formed of any one of the first supporting plate 110 and the second supporting plate 120 So that the restoring force can be provided in the horizontal direction by providing the reaction force corresponding to the force that the other one is inclined or horizontally spaced apart.

For example, when an external force is applied to the upper part of the second cover part 160 and an external force is applied from the left side of the first cover part 150, the second fixing plate 161 is pressed downward, Relative to the second cover portion 160, the first cover portion 150 relatively moves to the right.

A virtual axis connecting the opposite ends of the anti-vibration spring 130 is inclined while being bent, and the elastic supporting part 140 is also deformed into an inclined shape and is compressed while the left side of the elastic supporting part 140 is horizontal And the right side of the elastic supporting portion 140 is disposed to be spaced apart from the elastic pad 170 relatively. The second shielding plate 162 is compressed with the first shielding plate 153 around the elastic pad 170 to form a restoring force due to the elastic force of the elastic pad 170. Therefore, a reaction force is generated corresponding to the external force applied in the vertical direction and the horizontal direction, and a restoring force is formed not only in the vertical direction but also in the horizontal direction.

In addition, for example, when an external force is concentrated on the left upper end of the second cover part 160, the second fixing plate 161 is pressed downward in the left direction, And the right upper side is inclined to the raised shape (not shown).

Then, the anti-vibration spring 130 is compressed in the vertical direction, and the elastic supporting portion 140 disposed on the left side in the drawing is also compressed while being compressed to press the inner peripheral surface of the second guide groove 171 formed on the inner side of the elastic pad 170 Respectively. At this time, the elastic supporting portion 140 disposed on the right side is relatively stretched and a reaction force is applied to prevent the distance between the first supporting plate 110 and the second supporting plate 120 from being distanced from the distance of the elastic supporting portion 140 . Accordingly, the resilient supporting portion 140 disposed on the left side of the anti-vibration spring 130 in the vertical direction or the horizontal direction is subjected to a reaction force to bend the elastic supporting portion 140, and the elastic supporting portion 140 disposed on the right side is in the unfolded state A reaction force to return to the circular state acts to provide a vertical or horizontal restoring force that the first support plate 110 and the second support plate 120 can return to each other.

In addition, when the external force acts only in the horizontal direction, the anti-vibration spring 130, the elastic supporting portion 140, and the elastic pad 170 together can exert a reaction force in the opposite direction of the external force, have. This is because when the external force is transmitted to the first cover part 150 and the first cover part 150 is pressed in the left direction, the first support plate 110 fixed to the first fixing plate 151 is prevented from being damaged A reaction force is generated in the opposite direction by the spring 130 and the elastic support 140 and a reaction force is generated by the elastic pad 170 between the first shield plate 153 and the second shield plate 162 While providing resilience.

Since the restoring force of the vibration-proof spring 130 and the resilient supporting portion 140 can block the flow of the vibration and prevent the first supporting plate 110 and the second supporting plate 120 from being separated from each other, The anti-vibration device 100 can prevent the structure from falling down, that is, falling or detaching from the mounting surface.

Referring to FIG. 6, a fixing hole 164 is formed at the center of the second fixing plate 161. A female screw is formed in the fixing hole 164 and the adjusting part 180 is coupled to the fixing hole 164 so that the screw can be reciprocated vertically. The control unit 180 moves in the vertical direction on the fixing hole 164 to selectively press the second support plate 120. The compressive stress between the first support plate 110 and the second support plate 120 is adjusted according to the force that the regulating unit 180 presses the second support plate 120, There is an effect.

For example, when the first support plate 110 and the second support plate 120 are brought close to each other by rotating the control unit 180, the width between the first cover unit 150 and the second cover unit 160 is narrow The resilient restoring force between the anti-vibration spring 130 and the elastic supporting part 140 increases, and the horizontal structure of the structure can be adjusted together with other anti-vibration devices installed on the bottom surface of the structure.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken in conjunction with the present invention. But can be carried out within a range that does not deviate. Accordingly, such modifications are also considered to be within the scope of the present invention, and the true scope of protection of the present invention should be determined by the technical idea of the following claims.

100: anti-vibration device
110: first support plate 120: second support plate
130: anti-vibration spring 140:
150: first cover part 160: second cover part
170: elastic pad 180:
1: Switchboard 10: Enclosure main body

Claims (8)

A first support plate;
A second support plate spaced apart from the first support plate and supporting a bottom surface of the structure;
A vibration-proof spring interposed between the first support plate and the second support plate and facing each other to reduce transmission of vibration in a vertical direction;
A plurality of elastic supporting portions connecting the outer circumferential surface of the first support plate and the outer circumferential surface of the second support plate at a predetermined interval to maintain a space between the first support plate and the second support plate and reduce the transmission of vibration in a horizontal or vertical direction;
And a vibration damper. The method according to claim 1,
A first cover plate having a first fixing plate coupled to a lower surface of the first support plate and fixed to the mounting surface and a cylindrical first shield plate protruding from the first fixing plate to surround the periphery of the elastic support, ,
A second fixing plate coupled to an upper portion of the second support plate and fixed to a bottom surface of the structure, and a second cover portion protruding from the second fixing plate and having a cylindrical second shielding plate inserted into the first cover portion, Further comprising a vibration damper. The method of claim 2,
Wherein the second shielding plate includes a first guide groove formed at a position corresponding to a position of the elastic supporting portions so as not to interfere with the elastic supporting portions. The method of claim 3,
When the first support plate and the second support plate are brought close to each other, the first cover portion may pass through the first guide groove to restrict an extent of the elastic support portion protruding from the inner circumferential surface of the first shield plate, And an elastic pad interposed between the outer circumferential surfaces of the elastic supporting portions and contacting the protruded portions of the elastic supporting portions. The method of claim 4,
Wherein the elastic pad has a second guide groove formed in a position corresponding to a position where the guide groove is formed so that the elastic support portion is inserted while being protruded. The method of claim 2,
The height of the first shielding plate or the second shielding plate,
Wherein the first support plate and the second support plate are formed to be at least smaller than a height between the first support plate and the second support plate when the vibration-
Wherein the inner circumferential surface of the first shielding plate and the outer circumferential surface of the second shielding plate are formed so as to contact each other at least when the vibration-proof spring or the elastic supporting portion is pulled to the maximum. The method of claim 2,
A first fixing plate having a first fixing plate and a second fixing plate, the second fixing plate being fixed to the second fixing plate by a fixing screw, Further comprising an adjuster for adjusting an elastic force of the vibration-proof spring or the elastic supporter. The method according to claim 1,
The elastic support portion
When one side of the first support plate and the second support plate is compressed, the elastic support part coupled to one side of the first support plate and the second support plate is compressed and deformed in appearance, and the first support plate and the second support plate Wherein the elastic support part coupled to the other side of the first support plate and the second support plate prevents the first support plate and the second support plate from collapsing while maintaining the shape without being stretched when the first support plate and the second support plate are pulled. Device.
KR1020150160807A 2015-11-17 2015-11-17 Vibration Proofing Device KR101794668B1 (en)

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CN107611818A (en) * 2017-10-23 2018-01-19 安徽金环电气设备有限责任公司 A kind of shockproof high-tension switch cabinet
CN108346991A (en) * 2018-03-08 2018-07-31 华翔翔能电气股份有限公司 Shockproof box-type substation
CN108547829A (en) * 2018-06-29 2018-09-18 神华国华广投（柳州）发电有限责任公司 A kind of medium-speed pulverizer hydraulic cylinder and accumulator connection structure
CN109058690A (en) * 2018-09-11 2018-12-21 大连海事大学 A kind of novel parking lot display screen
CN109348681A (en) * 2018-10-19 2019-02-15 芜湖汉科信息技术有限公司 A kind of electrical cabinet safety device
KR101955574B1 (en) * 2018-08-14 2019-05-30 주식회사 제현산업 footbridge
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KR101038672B1 (en) * 2010-09-13 2011-06-02 (주)서전기전 Earthquake resistnat type switchgear using elastic supporting element providing kinesis
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Publication number Priority date Publication date Assignee Title
CN107611818A (en) * 2017-10-23 2018-01-19 安徽金环电气设备有限责任公司 A kind of shockproof high-tension switch cabinet
CN108346991A (en) * 2018-03-08 2018-07-31 华翔翔能电气股份有限公司 Shockproof box-type substation
CN108547829A (en) * 2018-06-29 2018-09-18 神华国华广投（柳州）发电有限责任公司 A kind of medium-speed pulverizer hydraulic cylinder and accumulator connection structure
KR101955574B1 (en) * 2018-08-14 2019-05-30 주식회사 제현산업 footbridge
CN109058690A (en) * 2018-09-11 2018-12-21 大连海事大学 A kind of novel parking lot display screen
CN109058690B (en) * 2018-09-11 2024-02-13 大连海事大学 Novel parking area display screen
CN109348681A (en) * 2018-10-19 2019-02-15 芜湖汉科信息技术有限公司 A kind of electrical cabinet safety device
CN116387994A (en) * 2023-03-15 2023-07-04 国网江苏综合能源服务有限公司 New energy regulation and control device
CN116387994B (en) * 2023-03-15 2024-01-23 国网江苏综合能源服务有限公司 New energy regulation and control device

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