KR102283836B1 - Transformer - Google Patents

Abstract

A ground transformer according to an embodiment of the present invention includes: a cabinet in which an interior space is formed having a front opening surface and a side opening surface extending rearward from a side end of the front opening surface; a panel provided inside the cabinet, disposed to correspond to the rear end of the side opening surface, spaced apart from the front opening surface, and provided with a bushing to which a power cable is connected and a configuration for checking an operation state; an opening/closing space defined as a spaced apart space between the front opening surface and the panel and opened forward and laterally by the front opening surface and the side opening surface; and a folding door rotatably coupled to the cabinet and configured to open and close the opening and closing space by rotation, wherein one end of the folding door is rotatably coupled to a side surface of the cabinet by a hinge device, and by rotation a side door opening and closing the side opening surface; and a front door that is rotatably coupled to the other end opposite to one end of the side door by a hinge device and opens and closes the front opening by rotation.

Description

Ground Transformer {Transformer}

The present invention relates to a ground transformer, and more particularly, to a ground transformer in which front and side openings are formed in a cabinet and the front and side openings can be opened and closed by a folding door, so that inspection and repair can be made more easily .

A ground transformer is a transformer installed on the ground, and is a device that generally receives electricity from a cable through which high voltage electricity flows, converts it to low voltage, and supplies it to consumers.

Electricity consumption is increasing year by year in society as a whole, and ground transformers are being installed in each city center for a smooth supply of electricity to each consumer.

A ground transformer may fail due to overload due to weather or rapid use of electric power, aging or damage of parts, etc. To prevent this, the ground transformer requires periodic safety inspection.

Such a ground transformer, installed on the ground, may be easily exposed to moisture and may be vulnerable to rust. In particular, when installed in a salty area such as a beach, the degree of rust may be severe, and rust-generating ground transformers may cause concerns about aesthetics and product quality.

Therefore, the ground transformer exposed to the widow for a long time is required to have excellent corrosion resistance, and it is a trend to be converted to stainless steel. In the case of stainless steel, as an expensive material, there is a problem in that the manufacturing cost of the ground transformer is greatly increased.

In general, a ground transformer may include a cabinet having a space formed therein and having a front opening, and a door opening and closing the front opening of the cabinet. In addition, a panel provided with a bushing to which a power cable is connected may be provided inside the cabinet.

The panel may be disposed on the inside spaced apart from the front opening surface of the cabinet so that an inspection and an operator do not come into contact with the bushing when the door is opened.

In the Republic of Korea Patent Publication No. 10-2018-0096416, an enclosure 10 having a space therein, and a door 20 for opening and closing the enclosure, the transformer front plate 11 inside the enclosure 10 is the enclosure ( A ground transformer (1) having a structure disposed so as to be spaced apart from the front opening of 10) is disclosed.

However, since the panel is located inside the cabinet spaced apart from the front opening surface, interference may be generated by the side of the cabinet during repair and inspection of the ground transformer, thereby causing inconvenience in repair and inspection. Also, it is difficult to access the panel from the side of the cabinet, so a work area is limited, and repair and inspection work is not easy.

Korean Patent Publication No. 10-2018-0096416

An object of the present invention is to provide an above-ground transformer in which the operator's repair and inspection work can be easily made by enabling the extended opening of the door while ensuring the safety of the operator when the door is opened.

An object of the present invention is to provide a ground transformer that can be manufactured at low cost with high corrosion resistance so that rust generation is minimized or not generated in any climatic or environmental conditions.

A ground transformer according to an embodiment of the present invention for achieving the above object includes: a cabinet in which an inner space is formed having a front opening surface and a side opening surface extending rearwardly from a side end of the front opening surface; a panel provided inside the cabinet, disposed to correspond to the rear end of the side opening surface, spaced apart from the front opening surface, and provided with a bushing to which a power cable is connected and a configuration for checking an operation state; an opening/closing space defined as a spaced apart space between the front opening surface and the panel and opened forward and laterally by the front opening surface and the side opening surface; and a folding door rotatably coupled to the cabinet and configured to open and close the opening and closing space by rotation, wherein one end of the folding door is rotatably coupled to a side surface of the cabinet by a hinge device, and by rotation a side door opening and closing the side opening surface; and a front door that is rotatably coupled to the other end opposite to one end of the side door by a hinge device and opens and closes the front opening by rotation.

In addition, the panel is divided into left and right into a high-pressure panel having a high-pressure bushing and a low-pressure panel having a low-pressure bushing, and the opening and closing space includes a high-pressure opening and closing space in which the high-pressure panel is exposed by a partition wall, and the low-pressure panel is exposed a low-pressure side opening and closing space that becomes wherein the folding door is provided as a pair, one opening and closing a side opening surface and a front opening surface corresponding to the low-pressure side opening and closing space, and the other one opening and closing a side opening surface and a front opening surface corresponding to the high-pressure side opening and closing space. It is characterized in that the spherical surface is opened and closed.

In addition, the cabinet includes a base plate forming a bottom surface, a hood forming an upper surface, a back plate forming a rear surface, and a pair of side plates forming left and right side surfaces of the hood, the rear end of the hood being rotated on the back plate It is characterized in that it is possible to open the upper surface of the cabinet.

And, a spring damper for elastically supporting the hood is provided in the cabinet, and the spring damper is extended in length by an elastic restoring force when the hood is opened to maintain the open state of the hood.

In addition, the cabinet and the door are formed of a PosMac material, and the cabinet and the hinge device are coupled by a proximal bolt penetrating the cabinet and the hinge device from the outside. The coupling is characterized in that the door and the hinge device are formed by a root angle bolt that penetrates from the outside.

The ground transformer according to an embodiment of the present invention can expect the following effects.

First, the cabinet has an interior space having a front opening surface and a side opening extending from the side end of the front opening to the rear, and a bushing to which the power cable is connected and a configuration for checking the operation state are arranged in the interior of the cabinet A panel is provided. In this case, the panel is disposed to correspond to the rear end of the side opening surface, and between the front opening surface and the panel, an opening/closing space opened to the front and to the side by the front opening surface and the side opening surface is formed. In addition, a folding door that is rotatably coupled to the cabinet to open and close the opening/closing space is provided.

The foldable door is rotatably coupled to a side surface of the cabinet by a hinge device, and is rotatably coupled to a side door that opens and closes the side opening surface by rotation, and is rotatably coupled to the side door by a hinge device, by rotation and a front door opening and closing the front opening surface.

According to this feature, in a state in which only the front door is opened, the side opening surface is shielded so that the panel cannot be accessed from the side, and the panel is located inside the front opening surface and spaced apart, so that an operator can use the panel It is possible to prevent the problem of being electrocuted by contact with the bushing provided in the . That is, in a state in which the operator opens only the front door, the safety of the operator is secured, and the operator can safely check the operation state of the ground transformer and the state of the bushing.

On the other hand, when the side door is additionally opened while the front door is open, both the front opening surface and the side opening surface are opened, so that the panel can be accessed from the side as well as from the front. Therefore, when a more efficient repair or inspection operation is required in a state in which the power of the ground transformer is cut off, the operator can open the side door to more easily repair or inspect the panel and components provided in the panel. can In other words, the work space can be freely adjusted according to the work contents.

Second, the opening/closing space is divided into a high-pressure side opening/closing space and a low-pressure side opening/closing space by a partition wall, and the panel is provided with a high-pressure bushing and is provided with a high-pressure panel exposed to the high-pressure side opening/closing space, and a low-pressure bushing, the low-pressure side It is divided into a low-pressure panel exposed as an opening and closing space. And, the folding door is provided as a pair, one of which opens and closes a lateral opening surface and a front opening surface corresponding to the low-pressure side opening and closing space, and the other is a lateral opening surface and a front opening surface corresponding to the high-pressure side opening and closing space. open and close

Therefore, since only the side opening surface and the front opening surface of the desired area among the low-pressure side opening/closing space and the high-pressure side opening/closing space can be opened, only the area requiring work can be opened to make repair or inspection work more safely.

Third, since the hood forming the upper surface of the cabinet is provided so that the upper surface of the cabinet can be opened by rotation, the upper surface of the opening and closing space can be opened through the opening of the hood.

Accordingly, the operator may open the hood to further expand the working space, thereby making repair or inspection easier. And, through the opening of the hood, it is possible to easily perform the repair and inspection work required from above the ground transformer.

Fourth, a spring damper for elastically supporting the hood is provided, and the spring damper is extended in length by an elastic restoring force when the hood is opened to maintain an open state of the hood. Therefore, it is possible to easily maintain the open state of the hood without lifting the hood by manpower or fixing the hood with a separate pedestal, and it is possible to induce a safe operation of the operator by securing an inclination angle necessary for the operation.

Fifth, since the cabinet and the door forming the outer shape of the ground transformer are made of POSMAC material, excellent corrosion resistance can be obtained.

Accordingly, the ground transformer minimizes or does not generate rust under any climatic conditions or environment, thereby ensuring excellent safety and durability. In addition, since the PosMAC material is provided at a lower price compared to the stainless steel plate generally used for ground transformers, it is possible to secure high corrosion resistance and reduce the preparation cost.

Sixth, the coupling of the cabinet and the hinge device is made by a proximal bolt penetrating the cabinet and the hinge device from the outside, and the coupling of the door and the hinge device is performed by a proximal bolt passing through the door and the hinge device from the outside. made by

Therefore, since the cabinet and the hinge device and the door and the hinge device are not welded together, but are made by the root angle bolt, the external appearance of the ground transformer can be neatly configured and the work man-hours can be minimized. In addition, it is possible to solve the problem of bonding of the Posmac material, which is difficult to weld, so that the Posmac material can be applied. In addition, before the door is opened, only the head of the root angle bolt is exposed to the outside, and since the root angle bolt cannot be released from the outside due to the characteristics of the root angle bolt, it is possible to effectively secure the security state of the ground transformer.

1 is a front view of a ground transformer in an open state according to an embodiment of the present invention.
2 is a side view of a ground transformer according to an embodiment of the present invention.
3 is a plan view of a ground transformer in a state in which the front opening surface is opened according to an embodiment of the present invention.
4 is a plan view of a ground transformer in an open state with a front opening surface and a side opening surface according to an embodiment of the present invention.
5 is a view showing a coupling structure of a door and a flap hinge according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, it cannot be said that the spirit of the present invention is limited to the embodiments presented, and other degenerative inventions or other embodiments included within the scope of the spirit of the present invention can be easily made by addition, change, deletion, etc. of other components. can suggest

1 is a front view of a ground transformer in an open state according to an embodiment of the present invention. 2 is a side view of a ground transformer according to an embodiment of the present invention.

The ground transformer 1 according to the embodiment of the present invention may include a cabinet 100 having a space therein, and a door 200 for opening and closing the cabinet 100 .

A transformer 20 for converting a high-voltage current into a low-voltage current may be provided in the interior space of the cabinet 100 .

The ground transformer 1 may include a heat dissipation device 40 that radiates heat generated by the transformer 20 to the outside.

The ground transformer 1 may include a panel 30 disposed in front of the transformer 20 inside the cabinet 100 .

Hereinafter, the configuration of the ground transformer 1 will be described in more detail.

The cabinet 100 may be formed in a box shape that is opened substantially forward. That is, the front opening surface 160 may be formed in the cabinet 100 .

In more detail, the cabinet 100 includes a base plate 110 forming a bottom surface, a hood 120 spaced upward from the base and forming an upper surface of the cabinet 100 , and the cabinet 100 . It may include a back plate 130 forming a lower surface and a pair of side plates 140 forming left and right side surfaces of the cabinet 100 .

The pair of side plates 140 may be divided into a left side plate 141 forming a left side surface of the cabinet 100 and a right side plate 142 forming a right side surface of the cabinet 100 . .

The interior space of the cabinet 100 may be opened forward. That is, the front opening surface 160 may be formed in the cabinet 100 .

In addition, the inner space of the cabinet 100 may be opened laterally, and may be opened at both left and right sides. That is, a pair of side opening surfaces 170 may be formed in the cabinet 100 .

The side opening surface 170 may be divided into a left opening surface and a right opening surface according to a formed position.

The pair of side opening surfaces 170 may be formed in contact with the front opening surface 160 .

For example, the pair of side plates 140 may have a smaller front and rear length than the base plate 110 and the hood 120 . In addition, the rear ends of the pair of side plates 140 may be positioned to correspond to the rear ends of the base plate 110 and the hood 120 . Accordingly, the front ends of the pair of side plates 140 may be located behind the front ends of the base plate 110 and the hood 120 , and the pair of side opening surfaces 170 may be formed.

That is, the pair of side opening surfaces 170 may be viewed as being formed by positioning the front ends of the pair of side plates 140 behind the front ends of the base plate 110 and the hood 120 .

At least one surface of the cabinet 100 may be provided with an air flow unit 101 through which outside air flows so that heat of the heat dissipation device 40 may be dissipated.

In this case, the air flow unit 101 may be formed to correspond to the arrangement position of the heat dissipation device 40 .

For example, the heat dissipating device 40 may include a heat dissipating plate that radiates heat through heat exchange with outside air, and the heat dissipating plate may be disposed at a rear side of the inner space of the cabinet 100 .

The air flow unit 101 may be formed on at least one of the back plate 130 and the side plate 140 of the cabinet 100 , and may be formed through the cabinet 100 . In addition, the air flow portion 101 may be formed in plurality.

The heat dissipation device 40 may absorb heat by being connected to components generating heat of the transformer 20 , and may radiate heat to the outside through heat exchange through the heat sink.

The panel 30 may cover the transforming unit 20 in front of the transforming unit 20 . In this case, the panel 30 may be disposed to be spaced rearwardly from the front opening surface 160 of the cabinet 100 inside the cabinet 100 .

In detail, the panel 30 may be positioned at the rear of the front ends of the hood 120 and the base plate 110 , and may be positioned to correspond to the front ends of the pair of side plates 140 .

Accordingly, the opening/closing space 150 opened in the front and left and right directions may be formed in the front of the panel 30 in the interior of the cabinet 100 . The opening/closing space 150 may be viewed as a space defined by the panel 30 and the hood 120 and the base plate 110 positioned in front of the panel 30 .

In addition, the front opening surface 160 may correspond to the front surface of the opening and closing space 150 . In addition, the pair of side opening surfaces 170 may correspond to the left and right side surfaces of the opening and closing space 150 .

On the other hand, the opening and closing space 150 may be divided into a plurality. For example, the cabinet 100 may include a partition wall 102 dividing the opening/closing space 150 . The partition wall 102 has a fixed thickness and may partition the opening/closing space 150 left and right.

The partition wall 102 may extend back and forth from the front surface of the panel 30 to a position corresponding to the front opening surface 160 of the cabinet 100 , and passes through the panel 30 to further rearward. may be extended.

Meanwhile, the panel 30 may include a high-pressure panel 31 and a low-pressure panel 32 .

The high-pressure panel 31 and the low-pressure panel 32 may be divided by the partition wall 102 .

For example, the panel 30 may be provided as an integrated structure and may be divided into a high-pressure panel 31 and a low-pressure panel 32 based on the partition wall 102 . Alternatively, the high-pressure panel 31 and the low-pressure panel 32 may be provided as separate components, and may be disposed in different areas partitioned by the partition wall 102 .

Hereinafter, for convenience of explanation, the opening/closing space 150 is partitioned to the left and right by the partition wall 102 as an example.

When the opening/closing space 150 is partitioned left and right by the partition wall 102 , the high-pressure panel 31 may be located on the left side of the partition wall 102 . In addition, the low-pressure panel 32 may be located on the right side of the partition wall 102 .

The opening/closing space 150 may be divided into a high-pressure side opening/closing space 151 in which the front surface of the high-pressure panel 31 is exposed, and a low-pressure opening/closing opening space 152 in which the front surface of the low pressure panel 32 is exposed. . That is, the opening/closing space 150 may be divided into a low-pressure side opening/closing space 152 and a high-pressure side opening/closing space 151 by the partition wall 102 on the left and right.

The high-voltage panel 31 may be provided with a high-voltage bushing 35 to which a high-voltage cable is connected. The high-pressure bushing 35 may be exposed through the front surface of the high-pressure panel 31 .

In addition, the low-pressure panel 32 may be provided with a low-pressure bushing 36 to which a low-voltage cable is connected. The low pressure bushing 36 may be exposed through the front surface of the low pressure panel 32 .

The high voltage cable for supplying high voltage power may be connected to the high voltage bushing 35 . The high-pressure bushing 35 may be electrically connected to the transformer 20 to supply the supplied high-voltage power to the transformer 20 .

Through this, a primary circuit through which high-voltage power flows from the high-voltage bushing 35 to the inside of the transformer 20 may be formed in the above-ground transformer 1 .

The low voltage cable for outputting low voltage power to the consumer may be connected to the low voltage bushing 36 . The low-pressure bushing 36 may be electrically connected to the transformer 20 to receive the low-pressure power reduced in the transformer 20 .

Through this, a secondary-side circuit through which low-voltage power flows from the inside of the transformer 20 to the low-voltage bushing 36 may be formed in the ground transformer 1 .

The high-pressure bushing 35 may pass through the high-pressure panel 31 to be connected to the primary circuit. In addition, the low pressure bushing 36 may pass through the low pressure panel 32 to be connected to the secondary circuit.

The high-pressure bushing 35 may include an HA terminal bushing and an HB terminal bushing. In addition, the number of the HA terminal bushing and the HB terminal bushing may be adjusted according to whether the ground transformer 1 is a three-phase transformer specification or a single-phase transformer specification.

The low-pressure bushing 36 may include an X-terminal bushing. And, the number of X-terminal bushings may also be adjusted according to the specifications of the ground transformer 1 .

Meanwhile, a plurality of internal components may be provided inside the transforming unit 20 .

In detail, insulating oil may be embedded in the transforming unit 20 .

Insulation oil is required to narrow the distance between each component due to the high voltage flowing inside the transformer 20 . By the insulating oil, the positions of the current flowing components provided in the transformer 20 may be stably maintained.

Some of the plurality of internal components provided in the transforming unit 20 may function to reduce high voltage power to low voltage power or to prevent damage to the transform unit 20 .

A transformer 21 for reducing high-pressure electric power to low-pressure electric power may be provided inside the transformer 20 . The transformer 21 may be electrically connected to the high-pressure bushing 35 and the low-pressure bushing 36 .

A tap changer 23 may be provided inside the transformer 20 . The tap changer 23 is connected to the circuit of the transformer 20 and changes the output voltage by changing the turns ratio. function can be

A manipulation unit operable by a user may be formed at the front end of the tap changer 23 . The manipulation unit of the tap changer 23 may be exposed through the panel 30 , and may be disposed on the high-pressure panel 31 .

A protection device 22 for preventing damage to the transformer 20 may be provided inside the transformer 20 .

A fuse may be applied as the protection device 22 . The fuse may be connected to a circuit inside the transformer 20 .

For example, the fuse may be connected to the primary circuit. The fuse may be connected to the high-voltage bushing 35 , and operates in the event of an internal failure such as a short-circuit accident of the ground transformer 1 to suppress the spread of the accident to the primary circuit.

A plurality of the fuses may be provided, and some may be connected to the secondary circuit. The fuse connected to the secondary circuit may function to protect the secondary circuit from failure and overload.

A current-limiting fuse may be applied as the fuse connected to the primary circuit. In addition, a dual element fuse may be applied as the fuse connected to the secondary circuit.

On the other hand, the protection device of the above-ground transformer is disclosed in various ways in the prior art, and the protection device of the present invention is not limited to the proposed embodiment, and various protection devices disclosed in the prior art can be applied. That is, in the description of the present invention, the protection device is applied as a fuse as an embodiment, but the protection device is not limited to the fuse and various protection devices disclosed in the prior art may be applied.

On the other hand, the ground transformer 1 may include a break switch 50 that conducts or cuts off the current supplied to the ground transformer 1 from the outside.

The brake switch 50 may be disposed on the panel 30 to be operably exposed, and may be disposed on the high-pressure panel 31 . In addition, the break switch 50 may pass through the panel 30 and be connected to the primary circuit to selectively energize or cut off the primary circuit. That is, the brake switch 50 may selectively block the high-voltage current supplied through the high-voltage bushing 35 by an on/off operation.

The brake switch 50 may be turned on/off by a user's manipulation, and a separate brake fuse may be provided therein.

The break fuse may be a fuse having a lower capacity than a fuse provided in the transformer 20 .

The break switch 50, when an internal failure such as a short circuit accident of the ground transformer 1, the brake fuse operates to cut off the primary circuit, thereby suppressing the spread of the accident inside the transformer 20 there is.

The break switch 50 may not include the break fuse, but may include an earth leakage breaker, and may be turned off by the operation of the breaker to cut off the primary circuit. The earth leakage breaker may be an earth leakage breaker having a lower capacity than a fuse provided inside the transformer 20 .

Meanwhile, the ground transformer 1 may further include a low voltage level switch 60 . The low-voltage level switch 60 may be connected to the secondary circuit to energize or cut off the secondary circuit.

The low pressure level switch 60 may be disposed on the panel 30 to be operably exposed, and may be disposed on the low pressure panel 32 . In addition, the low voltage level switch 60 may pass through the panel 30 and be connected to the secondary circuit to selectively energize and cut off the secondary circuit.

By providing the low pressure level switch 60 , only the secondary circuit is cut off, so that only the low pressure side area where the low pressure panel 32 is located can be checked and repaired.

On the other hand, the ground transformer (1), a condensed oil supply valve (81) for supplying insulating oil to the inside of the transformer (20), and an insulating oil discharge valve (82) for discharging the insulating oil inside the transformer (20) ) may be included.

The condensed oil supply valve 81 and the insulating oil discharge valve 82 may be provided on the panel 30 to be exposed so as to be operated by a user, and may be disposed on the low pressure panel 32 .

In addition, the condensed oil supply valve 81 and the insulating oil discharge valve 82 may communicate with the internal space of the transformer 20 .

In addition, the condensed oil supply valve 81 may be disposed at a height corresponding to an appropriate maximum height of the insulating oil inside the transformer 20 or a higher position. For example, it may be disposed above the low-pressure panel 32 , and may be positioned above at least the high-pressure bushing 35 and the low-pressure bushing 36 .

The insulating oil discharge valve 82 may be disposed below the low pressure panel 32 , and may be disposed below at least the high pressure bushing 35 and the low pressure bushing 36 .

Meanwhile, the ground transformer 1 may include a pressure relief valve 73 for discharging the internal pressure of the transformer 20 .

The pressure relief valve 73 may be disposed on the panel 30 , and may be disposed on the low pressure panel 32 . In this case, the pressure relief valve 73 may be disposed at a position higher than an appropriate maximum height of the insulating oil inside the transformer 20 .

The pressure relief valve 73 may function to discharge gas when the internal pressure rises rapidly due to a short circuit accident or the like in the pressure transformer 20 .

On the other hand, the ground transformer 1 includes an oil level gauge 71 indicating the amount of insulating oil inside the transformer 20 and a thermometer 72 indicating the temperature of the insulating oil inside the transformer 20 . may include more.

The oil level gauge 71 and the thermometer 72 may be disposed on the panel 30 , and may be disposed on the low pressure panel 32 .

The low pressure level switch 60 , the pressure relief valve 73 , the oil level gauge 71 , and the thermometer 72 may be densely disposed on one side of the low pressure panel 32 . For example, it may be disposed above the low pressure bushing 36 , and may be densely disposed on the low pressure panel 32 .

Therefore, when checking the above-ground transformer (1), the low-pressure level switch (60) can be accurately checked and operated with the naked eye to check whether the voltage is cut off or not, and the pressure relief valve (73), the oil level gauge (71) and the thermometer are densely packed. Through (72), it is possible to easily check the state of the ground transformer (1).

Meanwhile, referring to FIG. 2 , the hood 120 of the cabinet 100 is rotatably provided so that the upper surface of the inner space of the cabinet can be opened by rotation.

For example, the rear end of the hood 120 may be rotatably coupled to the back plate 130 . Therefore, in the initial state in which the hood 120 shields the upper surface of the inner space of the cabinet 100 , the upper end is rotated upward with the rear end as the rotation axis to open the upper surface of the inner space of the cabinet 100 . there is.

A portion of the hood 120 spaced apart from the rear end is supported by the damper 90 , so that the opening operation can be easily performed and the open state can be stably maintained.

For example, one end of the damper 90 may be connected to an approximately center of the hood 120 , and one end may be connected to the side plate 140 .

The damper 90 may be provided to be adjustable in length, and may be applied as a spring damper 90 having a spring therein.

The damper 90 includes a cylinder 91 having a spring therein, and a shaft 92 that is drawn in and out of the cylinder 91 and is elastically supported toward the outside of the cylinder 91 by the spring. may include In this case, the spring may be a coil spring.

In the state where the front end of the hood 120 is rotated downward to shield the upper surface of the inner space of the cabinet 100 , the shaft 92 is drawn into the cylinder 91 in the damper 90 . and the spring may be compressed.

Further, in the damper 90 , when the front end of the hood 120 is rotated upward and the upper surface of the inner space of the cabinet 100 is opened, the shaft 92 is moved to the outside of the cylinder 91 . can be withdrawn. In addition, the spring is extended by the elastic restoring force, and by elastically supporting the shaft 92 , the hood 120 may be maintained in an open state.

Accordingly, the hood 120 can be easily opened with a small force by the damper 90 , and the open state of the hood 120 can be stably maintained.

As the hood 120 can be opened, the repair and inspection of the ground transformer 1 can be performed more easily by opening the upper surface of the inner space of the cabinet 100 .

Meanwhile, the door 200 may be provided to open and close the front opening surface 160 and the side opening surface 170 of the cabinet 100 by rotation.

The door 200 may be provided in plurality, and may be provided to open and close a portion of the front opening surface 160 and the side opening surface 170 , respectively.

Hereinafter, the door 200 will be described in detail by taking as an example the number corresponding to the number of divisions of the opening/closing space 150 divided by the partition wall 102 .

Hereinafter, the structure of the door 200 and the coupling structure of the door 200 and the cabinet will be described in more detail with reference to the drawings.

3 is a plan view of a ground transformer in a state in which the front opening surface is opened according to an embodiment of the present invention. 4 is a plan view of a ground transformer in an open state with a front opening surface and a side opening surface according to an embodiment of the present invention.

The door 200 may include a high-pressure side door 210 for opening and closing the high-pressure side opening/closing space 151 and a low-pressure side door 220 for opening and closing the low-pressure side opening and closing space 152 .

The high-pressure side door 210 and the low-pressure side door 220 may be applied in a folding structure to enable opening and closing of the side opening surface 170 and the front opening surface 160 .

In detail, since the left opening surface of the side opening surfaces 170 corresponds to the side opening surface 170 of the high-pressure side opening/closing space 151 , it may be referred to as the high-pressure side opening surface 171 . In addition, the right opening surface among the side opening surfaces 170 corresponds to the side opening surface 170 of the low pressure side opening and closing space 152 , and thus may be referred to as the low pressure side opening surface 172 .

In addition, the front opening surface 160 may be divided into a left front opening surface 160 and a right front opening surface 160 by the partition wall 102 . In this case, since the left front opening surface 160 corresponds to the front surface of the high-pressure side opening/closing space 151 , it may be referred to as the high-pressure side front opening surface 161 . And, since the right front opening surface 160 corresponds to the front surface of the low pressure side opening/closing space 152 , it may be referred to as the low pressure side front opening surface 162 .

The high-pressure side door 210 includes a high-pressure side door 212 for opening and closing the high-pressure side opening surface 171 , and a high-pressure side front door 211 for opening and closing the high-pressure side front opening surface 161 . can do.

The high-pressure side door 212 may be formed in a plate shape corresponding to the high-pressure side opening surface 171 .

The high-pressure side door 212 may completely shield the high-pressure side opening surface 171 in a fully closed state. In this case, the high-pressure side door 212 may be located on the extended surface of the left side plate 141 . That is, the outer surface of the high-voltage side door 212 may be positioned on the same plane as the outer surface of the left side plate 141 , and may form a part of the left surface of the ground transformer 1 .

When the high-pressure side door 212 is closed, the rear end of the high-pressure side door 212 may be rotatably connected to the front end of the left side plate 141 by a hinge device. In this case, the hinge device may be a flap hinge 300 .

In addition, when the high-pressure side door 212 is opened, the front end may be rotated outward based on the rear end to open the high-pressure side side opening surface 171 .

Meanwhile, the high-pressure side door 212 may contact one side of the cabinet 100 in a state in which the high-pressure side opening surface 171 is completely shielded, and rotation in a closing direction may be restricted. Alternatively, rotation in the closing direction may be restricted by limiting the rotation radius of the flap hinge 300 . In addition, various structures and additional configurations for limiting rotation of the high-pressure side door 212 in the closing direction may be applied.

The front end of the high-pressure side door 212 may be opened at an angle of 90 degrees or more in a fully closed state so that the high-pressure side opening surface 171 may be completely opened. To this end, the flap hinge 300 may be provided to have a rotation angle of 90 degrees or more.

Meanwhile, the high-pressure side front door 211 may be formed in a plate shape corresponding to the high-pressure side front opening surface 161 .

The high-pressure side front door 211 may completely shield the high-pressure side front opening surface 161 in a fully closed state.

When the high-pressure side front door 211 is maximally closed, the left end of the high-pressure side front door 211 can be rotatably connected to the front end of the high-pressure side door 212 by a hinge device. there is. In this case, the hinge device may be a flap hinge 300 .

Further, when the high-pressure side front door 211 is opened, a right end thereof is rotated outward with respect to a left end thereof to open the high-pressure side front opening surface 161 .

On the other hand, the high-pressure side front door 211 is in contact with one side of the cabinet 100 in a state in which the high-pressure side front opening surface 161 is completely shielded, or by limiting the rotation radius of the flap hinge 300 . Rotation in the closing direction may be restricted. In addition, various structures and additional configurations for limiting rotation of the high-pressure side front door 211 in the closing direction may be applied.

When the high-pressure side door 212 and the high-pressure side front door 211 are completely closed, the high-pressure side front door 211 and the high-pressure side door 212 may be perpendicular to each other.

The high-pressure side front door 211 may be opened at an angle of 90 degrees or more in a closed state as much as possible so that the high-pressure side front opening surface 161 may be completely opened. To this end, the flap hinge 300 may be provided to have a rotation angle of 90 degrees or more.

Meanwhile, the low-pressure side door 220 may have the same structure as the high-pressure side door 210 .

The low-pressure side door 220 includes a low-pressure side door 222 for opening and closing the low-pressure side opening surface 172 and a low-pressure side front door 221 for opening and closing the low-pressure side front opening surface 162 . can do.

The low-pressure side door 222 may be formed in a plate shape corresponding to the low-pressure side opening surface 172 .

The low pressure side side door 222 may completely shield the low pressure side side opening surface 172 in a fully closed state.

In this case, the low-pressure side door 222 may be located on the extended surface of the right side plate 142 . That is, the outer surface of the low-voltage side door 222 may be located on the same plane as the outer surface of the right side plate 142 , and may form a part of the right surface of the ground transformer 1 .

When the low pressure side door 222 is closed, the rear end of the low pressure side door 222 may be rotatably connected to the front end of the right side plate 142 by a hinge device. In this case, the hinge device may be a flap hinge 300 .

In addition, when the low-pressure side door 222 is opened, the front end may be rotated outward based on the rear end to open the low-pressure side side opening surface 172 .

On the other hand, the low-pressure side door 222 contacts one side of the cabinet 100 while completely shielding the low-pressure side opening surface 172 or by limiting the rotation radius of the flap hinge 300 . Rotation in the closing direction may be restricted. In addition, various structures and additional configurations for limiting rotation of the low-pressure side door 222 in the closing direction may be applied.

The low pressure side side door 222 may be opened at an angle of 90 degrees or more in a closed state as much as possible so that the low pressure side side opening surface 172 can be fully opened. To this end, the flap hinge 300 may be provided to have a rotation angle of 90 degrees or more.

Meanwhile, the low pressure side front door 221 may be formed in a plate shape corresponding to the low pressure side front opening surface 162 .

The low pressure side front door 221 may completely shield the low pressure side front opening surface 162 in a fully closed state.

When the low pressure side front door 221 is maximally closed, the right end of the low pressure side front door 221 may be rotatably connected to the front end of the low pressure side door 222 by a hinge device. there is. In this case, the hinge device may be a flap hinge 300 .

In addition, when the low-pressure side front door 221 is opened, the left end of the low-pressure side front door 221 is rotated outward based on the right end, and thus the low-pressure side front opening surface 162 may be opened.

On the other hand, the low pressure side front door 221 contacts one side of the cabinet 100 in a state in which the high pressure side front opening surface 162 is completely shielded, or by limiting the rotation radius of the flap hinge 300 . Rotation in the closing direction may be restricted. In addition, various structures and additional configurations for limiting rotation of the low-pressure side front door 221 in the closing direction may be applied.

When the low pressure side door 222 and the low pressure side front door 221 are completely closed, the low pressure side door 222 and the low pressure side front door 221 may be perpendicular to each other.

The low pressure side front door 221 may be opened at an angle of 90 degrees or more in a closed state as much as possible so that the low pressure side front opening surface 162 may be fully opened. To this end, the flap hinge 300 may be provided to have a rotation angle of 90 degrees or more.

According to the structure of the door 200 according to the embodiment of the present invention described above, the high-pressure side opening/closing space 151 is shielded by the high-pressure side door 210 , and the low-pressure side opening and closing space 151 is shielded by the low-pressure side door 220 . The side opening/closing space 152 is shielded so that the panel 30 is not exposed to the outside, thereby preventing an electric shock accident.

And, when the front doors 211 and 221 are opened, the panel 30 may be exposed to the outside through the front opening surface 160 , and operation and inspection is possible.

At this time, the high-pressure side opening/closing space 151 and the low-pressure side opening/closing space 152 are partitioned by the partition wall 102, and as the high-pressure side door 210 and the low-pressure side door 220 are separately provided, Workers and inspectors can repair and inspect more safely by opening only the desired door 200 .

That is, only the high-pressure side front door 211 is opened to access the high-pressure panel 31 to perform manipulation and inspection of the high-pressure side region, and only the low-pressure side front door 221 is opened to access the low-pressure panel ( 32) can be accessed to perform manipulation and inspection of the low-voltage side area without exposure to high-voltage voltage.

In addition, by additionally opening the side doors 212 and 222 while the front doors 211 and 221 are opened, the side opening surface 170 may be additionally opened. That is, since the front doors 211 and 221 are rotatably connected to the side doors 212 and 222, when the front doors 211 and 221 are further pulled outward with the front doors 211 and 221 open, the side doors ( 212 and 222) may be rotated and opened. In addition, both the front opening surface 160 and the side opening surface 170 may be in an open state.

That is, as the side opening surface 170 can be additionally opened while the front opening surface 160 is opened, the opening and closing space 150 can be completely opened to the front and the side. Accordingly, the panel 30 can be accessed from the side, and the interference of the repair and inspector by the side of the ground transformer 1 is minimized, and the repair and inspection work can be made more easily.

On the other hand, the ground transformer 1 is disposed on the ground and is easily exposed to moisture, so corrosion resistance is required.

The cabinet 100 and the door 200 forming the outer shape of the ground transformer 1 may be formed of a material capable of corrosion resistance, or may be formed of a metal material having corrosion resistance.

In this case, the cabinet 100 and the door 200 may not be easily welded due to the characteristics of the material, and the appearance of the cabinet 100 and the door 200 may be damaged during welding. Accordingly, the cabinet 100 and the door 200 may be coupled to each other by the flap hinge 300 and the fastening member 400 .

Hereinafter, the material of the cabinet 100 and the door 200 and the coupling structure of the flap hinge 300 will be described in detail.

5 is a view showing a coupling structure of a door and a flap hinge according to an embodiment of the present invention.

The cabinet 100 and the door 200 may be formed of a metal material with strong corrosion resistance.

For example, the cabinet 100 and the door 200 may be made of a highly corrosion-resistant PosMac material developed by POSCO.

The POSMAC material is a magnetum and aluminum alloy coated product, and has corrosion resistance comparable to that of a stainless steel sheet.

On the other hand, the POSMAC material has a problem in that welding is difficult due to the characteristics of the material.

The POSMAC material is a known material, and a more detailed description thereof will be omitted.

The base plate 110 , the hood 120 , the back plate 130 , and the side plate 140 may be formed of the POSMAC material.

In addition, the base plate 110 , the hood 120 , the back plate 130 , and the side plate 140 may be coupled to each other by a fastening member 400 such as a screw or a bolt and a nut.

In addition, the side doors 212 and 222 and the front door 200 may be formed of a POSMAC material.

The side doors 212 and 222 and the side plate 140 may be coupled to the flap hinge 300 by a fastening member 400 such as a screw or a bolt and a nut.

In addition, the front doors 211 and 221 and the side doors 212 and 222 may be coupled to the flap hinge 300 by a fastening member 400 such as a screw or a bolt and a nut.

Hereinafter, an example in which the root angle bolt 410 and the nut 420 are applied as the fastening member 400 will be described in detail.

The proximal bolt 410 may include a head 411 and a body 412 extending from one surface of the head 411 and having a smaller circumference than the head 411 . A thread may be formed around the body 412 .

The proximal bolt 410 is formed in a substantially hemispherical shape without a groove in the head 411 to prevent it from being loosened by using a tool such as a wrench from the outside.

The nut 420 has a center through it, and a thread interlocking with the thread of the body 412 may be formed on an inner circumferential surface of the nut 420 . By inserting the body 412 of the root angle bolt 410 through the nut 420, the components positioned between the head 411 of the root angle bolt 410 and the nut 420 are fixed to each other. can

The base plate 110 , the hood 120 , the back plate 130 , and the side plate 140 are coupled to each other by a root angle bolt 410 and a nut 420 inserted from the outside to the inside. can be

Accordingly, it is possible to assemble the cabinet 100 made of POSMAC material. In addition, since the coupling portion of the cabinet 100 cannot be easily released from the outside, the security of the ground transformer 1 can be enhanced. In addition, since welding is not performed due to the coupling by the proximal bolt 410, the appearance can be neatly assembled.

Meanwhile, the side plate 140 , the front doors 211 , 221 , the side doors 212 and 222 , and the flap hinge 300 may also be coupled to each other by the proximal bolt 410 and the nut 420 inserted from the outside to the inside.

Accordingly, the cabinet 100 and the door 200 made of the POSMAC material can be assembled with the flap hinge 300 . Further, since the coupling portion between the cabinet 100 and the door 200 and the coupling portion of the door 200 cannot be easily released from the outside, the security of the ground transformer 1 can be enhanced. In addition, since welding is not performed due to the coupling by the proximal bolt 410, the appearance can be neatly assembled.

Hereinafter, a structure in which the side doors 212 and 222 and the front doors 211 and 221 are rotatably connected by a flap hinge 300 and a proximal bolt 410 will be exemplified as the side plate 140 and the front door 200. And a structure in which the side door 200 is rotatably connected will be described in more detail.

The flap hinge 300 may include a first coupling part 310 and a second coupling part 320 rotatably coupled to each other.

The second coupling part 320 may be disposed on inner surfaces of the side doors 212 and 222 . In addition, the first coupling part 310 may be disposed on the rear surface of the front doors 211 and 221 . In this case, the connection ends of the side doors 212 and 222 and the front doors 211 and 221 are in contact with or adjacent to each other to minimize exposure of the flap hinge 300 through a gap between the connection ends.

The proximal bolt 410 and the nut 420 may be provided in plurality, and the second coupling part 320 and the side doors 212 and 222 and the first coupling part 310 and the front doors 211 and 221 are It may be coupled by one or a plurality of proximal bolts 410 and nuts 420 .

The body 412 of the proximal bolt 410 may be coupled by sequentially passing through the side doors 212 and 222 and the second coupling part 320 from the outside of the side doors 212 and 222 . In addition, the nut 420 is coupled to the body 412 passing through the side doors 212 and 222 and the second coupling part 320 to fix the side doors 212 and 222 and the second coupling part 320 . can do.

When the body 412 of the proximal bolt 410 is coupled from the outside of the side doors 212 and 222, in a state where the coupling of the side doors 212 and 222 and the second coupling part 320 is completed, the proximal bolt ( Only the head 411 of 410 may be located on the outer surface of the side doors 212 and 222 . That is, when the door 200 is closed, only the head 411 of the proximal bolt 410 may be exposed to the outside of the ground transformer 1 .

In addition, the proximal bolt 410 may be coupled by sequentially passing through the front doors 211 and 221 and the first coupling part 310 from the outside of the front doors 211 and 221 . In addition, the nut 420 is coupled to the body 412 passing through the front doors 211 and 221 and the first coupling part 310 to fix the front doors 211 and 221 and the first coupling part 310 . can do.

When the body 412 of the proximal bolt 410 is coupled from the outside of the front doors 211 and 221, in a state where the coupling of the front doors 211 and 221 and the first coupling part 310 is completed, the proximal bolt ( Only the head 411 of the 410 may be positioned in front of the front doors 211 and 221 . That is, when the door 200 is closed, only the head 411 of the proximal bolt 410 may be exposed to the outside of the ground transformer 1 .

By means of the proximal bolt 410 and the nut 420, the cabinet 100 and the door 200 made of the POSMAC material of the ground transformer 1 can be easily assembled, and a neat appearance can be realized, and security state can be secured.

1: ground transformer 100: cabinet
101: air flow unit 102: bulkhead
110: base plate 120: hood
130: back plate 140: side plate
141: left side plate 142: right side plate
150: opening and closing space 151: high-pressure side opening and closing space
152: low pressure side opening and closing space 160: front opening surface
170: side opening 200: door
210: high-pressure side door 211: high-pressure side front door
212: high pressure side door 220: low pressure side door
221: low pressure side front door 222: low pressure side side door
300: flap hinge 400: fastening member
410: root angle bolt 420: nut
20: transformer 21: transformer
22: protective device 23: tap changer
30: panel 31: high pressure panel
32: low pressure panel 35: high pressure bushing
36: low pressure bushing 40: heat sink
50: brake switch 60: low pressure level switch
71: oil level gauge 72: thermometer
73: pressure relief valve 81: insulating oil supply valve
82: insulating oil drain valve 90: damper

Claims (5)

a cabinet in which an interior space is formed having a front opening surface and a side opening surface extending rearwardly from a side end of the front opening surface;
a panel provided inside the cabinet, disposed to correspond to the rear end of the side opening surface, spaced apart from the front opening surface, and provided with a bushing to which a power cable is connected and a configuration for checking an operation state;
an opening/closing space defined as a spaced apart space between the front opening surface and the panel and opened forward and laterally by the front opening surface and the side opening surface;
and a folding door rotatably coupled to the cabinet and opening and closing the opening and closing space by rotation.
The folding door is
a side door having one end rotatably coupled to a side surface of the cabinet by a hinge device and opening and closing the lateral opening surface by rotation;
a front door that is rotatably coupled to the other end opposite to one end of the side door by a hinge device, and opens and closes the front opening by rotation;
The cabinet and the door are formed of a PosMac material,
The combination of the cabinet and the hinge device is made by an angled bolt penetrating the cabinet and the hinge device from the outside,
The coupling of the door and the hinge device is a ground transformer, characterized in that it is made by an angled bolt passing through the door and the hinge device from the outside. The method of claim 1,
The panel is divided into a high pressure panel provided with a high pressure bushing and a low pressure panel provided with a low pressure bushing, left and right,
The opening/closing space is divided into a high-pressure side opening/closing space through which the high-pressure panel is exposed and a low-pressure side opening/closing space through which the low-pressure panel is exposed by a partition wall on the left and right;
The side opening surface includes a left opening surface extending rearward from the left end of the front opening surface, and a right opening surface extending rearwardly from the right end of the front opening surface,
The folding doors are provided as a pair, one opening and closing a lateral opening and a front opening corresponding to the low-pressure side opening and closing space, and the other opening and closing of a lateral opening and a front opening corresponding to the high-pressure opening and closing space. Ground transformer, characterized in that. The method of claim 1,
The cabinet includes a base plate forming a bottom surface, a hood forming an upper surface, a back plate forming a rear surface, and a pair of side plates forming left and right sides,
and the rear end of the hood is rotatably coupled to the back plate, so that the upper surface of the cabinet can be opened. 4. The method of claim 3,
The cabinet is provided with a spring damper elastically supporting the hood,
The spring damper is extended in length by an elastic restoring force when the hood is opened to maintain an open state of the hood. delete

Images