KR20210000627A - Installation and withdrawal of transformer in switchgear - Google Patents

Abstract

The present invention relates to a transformer installation and withdrawal device of switchgear which guides movement of the switchgear while a lifting means is in contact with the ground when moving for installation of the switchgear by installing the lifting means on a bottom surface of the switchgear, and assists withdrawal of heavy electric equipment while the lifting means lifts and supports the heavy electric equipment when the heavy electric equipment is withdrawn to the outside of an enclosure to repair and check the heavy electric equipment installed inside the switchgear enclosure, thereby simply performing withdrawal operation of the outside of the enclosure of the heavy electric equipment with convenience of the movement in accordance with the installation of the switchgear.

Description

Installation and withdrawal of transformer in switchgear}

The present invention relates to a transformer installation and withdrawal device of a switchgear, and in more detail, a switchboard transformer installation and a switchboard transformer installation and in which the transformer is lifted by the lifting operation of the lifting plate installed on the bottom of the enclosure, and the elevated transformer is pulled out through rollers. It relates to a withdrawal device.

The switchboard is a device that steps down high-voltage power supplied from a substation to a commercial voltage and supplies it to customers.

The switchgear is a power receiving facility for receiving high-voltage power supplied from a substation, a substation facility for stepping down the high-voltage power received from the substation to a commercial voltage, and a distribution facility for supplying the stepped down electricity to the electric devices in the building. It may include switch devices and other safety devices.

In this switchgear, electrical equipment such as heavy electricity, switch devices, and other safety devices are installed inside the enclosure to control power supply.

Particularly, automatic load transfer switch (ALTS) used for automatic load switching between heavy electricity or main line and spare line to transform extra-high voltage, instrument transformer (MOF) that converts high voltage/high current into low voltage/small current, vacuum Circuit breakers (VCBs) are representative transformers.

Transformers installed inside the enclosure should be taken out of the enclosure as necessary for repair and maintenance work.

In the Korean Patent Office Registered Utility Model Publication No. 20-0422854, in a known switchboard with an opening or closing door formed on the front, front, or rear, and various instruments, viewing windows, and indicator lamps fixedly installed on the opening and closing door, a guide means in the space room of the enclosure. And, a technique in which a movable arrangement box having a plurality of supports and a caster structure is fitted and fixed to the space chamber has been disclosed.

The above technology is a method of easily inserting and withdrawing heavy electricity into the interior of the enclosure through the guide means and caster structure, but the casters and guide means of the technology are fixedly installed on the interior floor of the enclosure, so that they can be removed from the exterior of the enclosure floor. It is not a structure, and therefore, there is a problem in that a large number of workers and equipment must still be mobilized to directly drag the case where the heavy electric machine is installed in order to move the case where the heavy electric machine is installed.

Document 1: Korean Intellectual Property Office Registration Utility Model Publication No. 20-0422854

Accordingly, it is an object of the present invention to provide a switchgear transformer installation and withdrawal device that raises and lowers a transformer by an elevating operation of an elevating plate installed on the bottom of a housing, and allowing the elevated transformer to be withdrawn through a roller.

Another object of the present invention is to provide a switchgear transformer installation and withdrawal device capable of withdrawing the transformer to the outside of the enclosure even if a plurality of equipment is not mobilized by allowing the lifting plate to come out of the enclosure while supporting the transformer.

In the present invention, in the transformer installation and withdrawal device of the switchboard, a case provided with a space for accommodating the transformer, a bottom plate having a hole formed at the center and rail guide plates on both sides of the hole , An elevating plate that is movable up and down on the upper surface of the floor plate and supports the transformer accommodated in the space, a lead screw disposed at a certain distance below the bottom square of the elevating plate, and the lead screw A driven pulley coupled to an outer diameter and a driving pulley wound in a state sequentially passing through the driven pulley and rotated by the power of a driving motor are engaged with the driving pulley to transmit the power of the driving pulley to the driven pulley to fix the lead screw, Chain for reverse rotation, screwed to the outer diameter of the leadscrew, moves up and down according to the rotational motion of the leadscrew, passes through the hole of the floor plate, and contacts the bottom square of the lifting plate A lifting means consisting of a lifting nut for lifting the lifting plate, and fixedly installed in a state covered over a roller hole formed on the upper surface of the lifting plate, and a space is provided inside and the lower end is opened. A roller bracket installed in a state of being elastically supported by the main spring in the inner space, a roller coupled under the roller bracket with a bearing therebetween, and in a state located on both sides of the bearing, the ends are inserted into the bearing, and the tip An auxiliary spring installed between the first and second shafts exposed to both sides of the bearing and the first and second shafts and elastically pushes the first and second shafts, and an auxiliary spring formed at the lower end of the inner wall surface of the inner space of the housing to lift the lifting plate A rail guide plate of the floor plate by the rollers having passed through the roller holes of the lifting plate according to the lifting operation of the lifting plate, consisting of first and second stepped portions that respectively engage the tips of the first and second axes according to the operation Consisting of moving guide means to guide the withdrawal of the lifting plate by supporting it in contact with the will be.

In the present invention, when moving for installation of the switchboard by installing the lifting means on the bottom of the switchboard, the lifting means contacts the ground and guides the movement of the switchboard, and also includes a heavy electric machine to repair and check the heavy electricity installed inside the switchboard enclosure. In the case of withdrawal to the outside, the lifting means supports the heavy electric machine in the state of lifting it and helps the heavy electric machine withdraw. This has the effect of being able to conveniently perform the operation of withdrawing the heavy electric unit outside the housing as well as the convenience of movement according to the switchboard installation.

1 is a side view showing the overall configuration of a transformer installation and withdrawal device of a switchgear of the present invention.
Fig. 2 is a three-dimensional view showing the main configuration of Fig. 1;
3 is a view showing an extract of the main configuration of FIG. 1;
4 to 6 are views showing the operation of the switchboard transformer installation and withdrawal device.

Referring to FIGS. 1 to 3, the switchboard transformer installation and withdrawal device is composed of a housing in which a space 12 for accommodating the transformer 200 is provided, and a floor plate 14 is provided at the bottom of the housing 10. It is installed in a state separated from the ground by a certain distance while being supported by the seismic isolator 13. An installation space 11 for installing a lifting means 20 is provided between the floor plate 14 and the ground through the height of the seismic isolator 13.

The bottom plate 14 of the housing 10 is formed with a hole 16 in the center so as to have a "∩" shape in a plan view so as not to interfere with the operation of the lifting means 20, and moving guide means 40 on both sides thereof. ) Through a rail guide plate (18) so that the lifting plate (80) supporting the transformer (200) can come out to the front.

The elevating plate 80, the lifting means 20, and the moving guide means 40 have a transformer 200 installed inside the enclosure 10 or, in particular, a transformer installed in the interior space 12 of the enclosure 10 ( These devices are provided for the purpose of allowing the transformer 200 to be easily withdrawn to the outside of the enclosure 10 during inspection work such as replacement of 200) and fault repair.

The elevating plate 80 is a plate type of a flat plate, which is mounted on the upper surface of the bottom plate 14 of the enclosure 10 so as to move up and down, and directly supports the transformer 200.

The lifting means 20 is installed in the installation space 11 between the floor plate 14 and the ground, and lifts the lifting plate 80 through the hole 16 of the floor plate 14.

The lifting means (20) are four leadscrews (30), each screwed to the outer diameter of the leadscrew (30), four lifting nuts that move up and down according to the rotational motion of the leadscrew (30) It consists of (32).

The leadscrew 30 is positioned at the bottom four corners of the lifting plate 80 located above the hole 16 of the floor plate 14, and four lifting screws coupled to the leadscrew 30 in a screw manner. The nuts 32 are brought into contact with the four corners of the bottom of the lifting plate 80.

The leadscrew 30 receives power from one driving motor 22 and simultaneously rotates in the forward and reverse directions.

To this end, a driven pulley 28 is fixedly installed on the outer diameter of the lead screw 30, and a chain 26 is sequentially wound on the outer diameter of the driven pulley 28, forming a closed circuit, and is attached to the four lead screws 30. The fixedly installed driven pulley (28) is connected with one chain (26). One drive pulley 24 is engaged with the chain 26, and the drive pulley 24 is coupled to the shaft of the drive motor 22 to receive power from the drive motor 22 to receive the drive pulley ( 24) rotates in the forward and reverse directions.

When the driving pulley 24 rotates in the forward and reverse directions with the power of the driving motor 22, the chain 26 moves in the left and right directions. In this process, the chain 26 and the driven pulley 28 The four leadscrews 30 connected to each other are rotated in forward and reverse directions simultaneously with the driving pulley 24.

Four lifting nuts 32 each screwed to the outer diameter of the leadscrew 30 are screw threads formed on the outer diameter of the leadscrew 30 according to the forward and reverse rotational motion of the leadscrew 30 It moves up and down by riding (30a). At this time, when the lifting nut 32 performs an ascending operation, the lifting nut 32 is in contact with the four corners of the bottom of the lifting plate 80 as described above. The plate 80 is lifted up to perform an elevating operation.

When the lifting operation of the lifting plate 80 is performed, the roller 50 of the moving guide means 40 passes through the roller hole 82 of the lifting plate 80, and the rail guide plate of the bottom plate 14 ( 18), and after this process is performed, the lifting nut 32 descends along the thread 30a of the lead screw 30, which starts to rotate in the opposite direction with the power of the driving motor 22. It falls from the bottom four corners of the lifting plate 80 and returns to the initial state.

The moving guide means 40 rides on the rail guide plates 18 provided on both sides of the bottom plate 14 of the housing 10 after the transformer is lifted according to the elevating operation of the elevating plate 80. It is provided for the purpose of moving the transformer 200 to the outside of the enclosure 10 to be moved.

The moving guide means 40 is mounted in the same structure at four outer corners of the upper surface of the lifting plate 80.

When explaining the structure of one moving guide means, the housing 42 and the housing 42 are fixedly installed in a state covered with the roller hole 82 of the lifting plate 80, and a space is provided inside and the lower end is opened. ) To be installed in the inner space of the main spring, roller brackets, first and second shafts (56, 58) and a roller (50).

First and second guide grooves 62 and 64 are vertically provided on both inner wall surfaces of the inner space 44 of the housing 42, and first and second guide grooves 62 and 64 are provided below the first and second guide grooves 62 and 64. Two stepped portions 66 and 68 are formed. The first and second guide grooves 62 and 64 are fitted with the tips of the first and second shafts 56 and 58, respectively, while riding the first and second guide grooves 62 and 64. Guide the shafts 56 and 58 to move up and down.

In the first and second stepped portions 66 and 68, the tips of the first and second shafts 56 and 58, which have moved downward by riding the first and second guide grooves 62 and 64, are the expansion force of the auxiliary spring 60 In the process of being pushed out by the first and second shafts (56, 58), the tips of the first and second stepped portions (66, 68) are respectively caught, and the roller (50) exposed under the lifting plate (80) The roller 50 is supported so that it is not pushed back into the housing 42 by the load of the transformer 200. That is, when the lifting operation of the lifting plate 80 proceeds while the roller 50 is not exposed below the initial lifting plate 80, the lifting plate 80 through the roller hole 82 of the lifting plate 80 It is exposed below 80 and moves on the rail guide plate 18 of the enclosure 10.

The roller bracket 48 is elastically supported by the main spring 46 while being inserted into the inner space 44 of the housing 42. That is, the main spring 46 is located at the upper end of the inner space 44 of the housing 42, and the roller bracket 48 makes elastic contact under the main spring 46.

A bearing 52 is coupled under the roller bracket 48, and a roller 50 is coupled to the outer diameter of the bearing 52.

The first and second shafts 56 and 58 are installed in the inner space 53 of the bearing 52 with the auxiliary spring 60 interposed therebetween.

The first and second shafts 56 and 58 are inserted and installed with their ends facing the inner space 53 of the bearing 52 while being located on both sides of the bearing 52, and the first and second shafts When the transformer 200 is pushed to pull out the transformer 200, the rollers 56 and 58 perform a shaft function so that the roller 50 can rotate. At this time, an auxiliary spring 60 is provided between the first and second shafts 56 and 58, and the first and second shafts 56 and 58 are respectively externally disposed by the tension force of the auxiliary spring 60. It receives the force to be pushed in the direction.

The tips of the first and second shafts (56, 58) are formed on the inner wall surfaces of the inner space (44) on both sides of the housing (42) by the tension force of the auxiliary spring (60). 62, 64, respectively, in the state of elastic contact, the lifting operation of the lifting plate 80 proceeds, and while the housing 42 is lifted, the first and second guide grooves 62 and 64 are moved downwards. , The first and second stepped portions 66 and 68 provided at the lower ends of the first and second guide grooves 62, 64, respectively, and exposed under the roller hole 82 of the lifting plate 80. ) Can be supported without entering the housing 42 by the weight of the transformer 200.

In the transformer installation and withdrawal device of the switchgear of the present invention configured as described above, the roller 50 of the moving guide means 40 is moved when the lifting plate 80 is lifted by the driving of the lifting means 20 when the transformer 200 is withdrawn. When the transformer 200 is pushed by being supported under the roller hole 82 of the lifting plate 80, the roller 50 moves along the rail guide plate 18 of the housing 10, and the transformer ( 200) is guided to come out of the enclosure 10.

The operation of the transformer installation and withdrawal device of such a switchboard will be described in more detail.

First, when you want to take out the transformer 200 installed inside the enclosure 10 for inspection or other transformer replacement, you can apply power to the driving motor 22 and rotate the driving pulley 24 to drive the The four driven pulleys 28 connected by the pulley 24 and the chain 26 rotate the four leadscrews 30 at the same time, and in this process, they are respectively screwed to the outer diameter of the leadscrew 30 The four lifting nuts 32 are lifted and descended on the threads 30a formed on the outer diameter of the leadscrew 30 according to the rotational motion of the leadscrew 30, and are mounted on the bottom four corners of the lifting plate 80. In a contacted state, the lifting plate 80 is lifted upward to perform the lifting operation.

When the lifting plate 80 moves up and down, the rollers 50 of the moving guide means 40 installed at the four corners of the upper surface of the lifting plate 80 are lowered through the roller holes 82 of the lifting plate 80. It is exposed to and comes into contact with the rail guide plate 18 of the enclosure 10, and rolling rotation is performed so that the transformer 200 moves.

That is, if the operation of one moving guide means 40 is described, when the lifting plate 80 is raised and lowered, the housing 42 installed on the upper surface of the lifting plate 80 is lifted together. The ends of the two shafts (56, 58) are in the first and second guide grooves (62, 64) formed on both inner wall surfaces of the inner space (44) of the housing (42) by the tension force of the auxiliary spring (60). When the lifting plate 80 is lifted and lowered in a state of elastic contact, respectively, the first and second guide grooves 62 and 64 are moved downward while the housing 42 is lifted, and then the first, The first and second stepped portions 66 and 68 provided at the lower ends of the two guide grooves 62 and 64 are hooked, respectively.

And the roller 50 descends together with the first and second shafts 56 and 58 while the housing 42 is lifted, and is exposed under the hole 82 of the lifting plate 80 to be exposed to the enclosure 10 It comes into contact with the rail guide plate 18 of the transformer 200 by means of the first and second shafts 56 and 58 that are hung on the first and second stepped portions 66 and 68. ) Effectively supports the self-weight.

Next, when the operator enters the interior of the enclosure 10 and pushes the transformer 200, the transformer 200 is enclosed together with the lifting plate 80 by rolling motion of the roller 50 in contact with the rail guide plate 18. (10) It can be easily withdrawn to the outside.

10: housing 14: floor plate
16: hole 18: rail guide plate
20: lifting means 22: drive motor
26: chain 30: lead screw
32: lifting nut 40: moving guide means
42: housing 46: main spring
50: roller 52: bearing
56, 58: 1st, 2nd axis 60: auxiliary spring
62, 64: first and second guide grooves 66, 68: first and second stepped portions
80: lifting plate 82: roller hole

Claims (1)

In the transformer installation and withdrawal device of the switchgear
A housing 10 provided with a space 12 for accommodating the transformer 200;
A bottom plate 14 comprising a bottom of the enclosure 10 and having a hole 16 formed at the center thereof, and having rail guide plates 18 on both sides of the hole 16;
An elevating plate 80 that is raised on an upper surface of the floor plate 14 so as to move up and down and supports the transformer 200 accommodated in the space 12;
A lead screw 30 disposed at a predetermined distance below the bottom square of the lifting plate 80;
A driven pulley 28 coupled to the outer diameter of the leadscrew 30;
It is wound in a state passing through the driven pulley 28 sequentially and is meshed with a driving pulley 24 that rotates with the power of the driving motor 22, so that the power of the driving pulley 24 is transferred to the driven pulley 28. A chain 26 for forward and reverse rotation of the leadscrew 30 by transmitting;
It is screwed to the outer diameter of the leadscrew 30, moves up and down according to the rotational motion of the leadscrew 30, passes through the hole 16 of the bottom plate 14, and passes the elevating plate 80 Lifting means (20) consisting of a lifting nut (32) for lifting the lifting plate (80) in a state in contact with the bottom square surface of the;
A housing 42 which is fixedly installed while being covered over the roller hole 82 formed on the upper surface of the lifting plate 80, and has a space 44 inside and the lower end is opened;
A roller bracket 48 installed in the inner space 44 of the housing 42 while being elastically supported by the main spring 46;
A roller 50 coupled under the roller bracket 48 with a bearing 52 therebetween;
First and second shafts (56, 58) whose ends are inserted into the bearing (52) in a state located on both sides of the bearing (52), and the tips are exposed to both sides of the bearing (52);
An auxiliary spring (60) installed between the first and second shafts (56, 58) and elastically pushing the first and second shafts (56, 58);
The first and second ends of the first and second shafts 56 and 58 are formed at the bottom of the inner wall surface of the inner space 44 of the housing 42 and are respectively hooked according to the lifting operation of the lifting plate 80 Consisting of stepped portions 66 and 68, the roller 50 passing through the roller hole 82 of the lifting plate 80 according to the lifting operation of the lifting plate 80 is a rail of the floor plate 14 A transformer installation and withdrawal device of a switchboard, characterized in that it comprises a moving guide means (40) for supporting the guide plate (18) in a contacted state to guide the withdrawal of the lifting plate (80).

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