KR101839816B1 - Pressure relief Device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pressure reducing device and, more particularly, to a pressure reducing device for temporarily reducing a pressure inside a rupturing plate when a pressure is suddenly increased due to an abnormal pressure generated in a transformer, will be. To this end, a lid for providing a plurality of lid fastening portions and concave / convex portions on an imaginary circumferential inner side, a main body portion having a main fastening portion and a lancet bar to be engaged with the lid fastening portion, And a rupture plate for releasing the inner air to the outside by tearing by the needle bar when abnormal pressure is generated.

Description

Technical Field [0001] The present invention relates to a pressure relief device,

More particularly, the present invention relates to a pressure reducing device, and more particularly, to a pressure reducing device that hermetically closes a hand hole of a transformer, and when an abnormal pressure is generated in a transformer and the pressure rises sharply, And a reduction device.

A transformer is a device that changes the voltage or current using an electromagnetic induction phenomenon. The transformer used by KEPCO is installed on the electric pole and supplies high voltage electricity to the home by lowering it to low pressure. In this case, in case of transformer, insulating oil is contained in the transformer enclosure to cool and insulate the coil. When moisture or other foreign matter enters into such insulating oil, insulating property of the insulating oil is lowered, thereby reducing the life of the coil. If the internal pressure rises sharply, it will lead to an accident that breaks the transformer.

In order to prevent such a transformer accident, a hand hole is formed in the upper part of the transformer enclosure so as to prevent infiltration of external impurities and to discharge the instantaneous pressure inside the transformer when the transient pressure suddenly rises, and a cover is simply provided on the hand hole. However, in such a cover, when the instantaneous pressure inside the transformer rises sharply, there is a possibility that internal oil flows out and burns on a pedestrian, etc. In particular, it is necessary to prevent foreign impurities such as rainwater or moisture from penetrating into the transformer .

Korean Patent Registration No. 10-1525363 (entitled "Instantaneous Pressure Reduction Device for Transformer") Korean Patent Registration No. 10-1465690 (entitled "Automatic Return Type Smart Instantaneous Pressure Reduction Device") Korean Patent Registration No. 10-1149921 (entitled "Emission Safety Device of Transformer") Korean Patent Registration No. 10-1038773 (entitled: Emission safety device) Korean Utility Model Registration No. 20-0443694 (Title: Emission safety device for pillar transformer) Korean Patent Registration No. 10-0899417 (entitled "Method for installing discharge safety device for pillar transformer in hand hole of pillar transformer) Korean Patent Publication No. 10-1229732 (entitled: Instantaneous Pressure Emitter for Transformer) Korean Patent Registration No. 10-1207169 (entitled: Instantaneous Pressure Emitter for Transformer) Korean Utility Model Registration No. 20-0425147 (entitled: Pressure Relief Device for Transformer) Korean Utility Model Registration No. 20-0440185 (entitled: Instantaneous Pressure Reduction Device)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an instantaneous pressure reducing apparatus for a transformer installed in a hand hole of a transformer and capable of rapidly reducing the instantaneous high- It has its purpose.

However, the objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

It is an object of the present invention to provide a lid comprising a lid portion having a plurality of lid fastening portions and concavo-convex portions on an imaginary circumference on the inner side, a main body portion having a main fastening portion and a lancet bar to be engaged with the lid fastening portion, And a rupture plate which is positioned below the inner wall and which is torn by the needle bar when an abnormal pressure is generated therein to thereby discharge the inner air to the outside.

The lid fastening part is provided at a plurality of imaginary circumferential positions of the inner lid part. The protruding and contracting part is formed on a virtual circumference within a predetermined distance from the lid fastening part, and the lid fastening part is fastened to the main body fastening part Is formed in the inner lid portion at a position corresponding to the position where the fastening portion is formed.

The concave and convex portions are formed as recesses having a relatively low height as compared with the convex portions so that the inner air moving upward from below by the tearing of the rupture plate when an abnormal pressure is generated, The portion is formed by protruding a relatively higher height than the concave portion so that the insulating oil moving upward from below by the tear of the rupture plate when an abnormal pressure is generated is not discharged to the outside.

In addition, the concave portion and the convex portion are respectively formed in plural on the imaginary circumference, so that the inside air is discharged from many surfaces to the outside, so that the insulating oil is not discharged to the outside.

The second concavo-convex portion is formed on an imaginary circumference of the inner lid portion at a relatively distance inward relative to the first concavo-convex portion, and the second concavo-convex portion is formed on the concave portion of the concave- And the convex portion are formed so as not to overlap with the concave portion and the convex portion of the second concave-convex portion so as not to overlap with each other so that the insulating oil is not discharged to the outside.

The main body includes a body portion having a plurality of fixing portions formed with fixing holes, a main body coupling portion formed at a predetermined height on the upper surface of the body portion, the cross-section being smaller than the diameter of the body portion, And a vertical support disposed downwardly in a central region of the horizontal support.

In the first embodiment, a thread and a thread are formed on the outer circumferential surface of the main body fastening part. The plurality of lid fastening parts protrude downward from the inner upper surface of the lid by a predetermined length. Are formed on the protrusions of the respective lid fastening portions, and the threads of the main body fastening portion and the threads and the threaded portions formed on the plurality of projections of the threaded boss and the lid fastening portion are engaged with each other.

Further, the plurality of lid fastening portions are arranged to face the convex portions, respectively, and are provided at four virtual circumferential positions of the inner lid portion.

Further, at least two of the plurality of lid fastening portions are supported by the support ribs.

In the second embodiment, a plurality of fastening grooves are formed on the outer circumferential surface of the main body fastening portion, and the plurality of lid fastening portions have a first protrusion protruding downward from the inner upper surface of the lid by a predetermined length, And each of the second projections is fastened to the fastening groove.

Further, the fastening groove is formed by bending downward from one side of the upper surface of the outer side surface of the main body fastening portion, and the groove is formed diagonally with decreasing width from the upper side to the lower side. And are fastened and coupled.

Further, the plurality of lid fastening portions are disposed to face each other with the concave portions, and are provided at three virtual circumferential positions of the inner lid portion.

Further, the plurality of lid fastening portions are respectively supported by the support ribs.

Further, the cover further includes a cover for covering the pressure reducing device, and one of the fixing portions is formed with a step by the thickness of the fixing ring of the cover.

In addition, since the lid portion narrows in width from the lower side to the upper side, the inner air discharged to the outside can be collected at the central portion of the lid portion, and the cover can be opened easily.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a washing machine and a washing machine which are provided with a main body having a lid portion and a lid portion and a lid portion and a main body portion provided below the lancet bar, And a gasket positioned below the rupture plate. The present invention also provides a pressure reducing device comprising:

The cover further includes a cover for covering the pressure reducing device, and a step is formed in the fixing part of the main body part fixedly coupled to the cover by a thickness of the fixing ring of the cover.

A gasket protruding portion having a height difference in a circumferential direction is formed on one surface of the gasket to prevent moisture from penetrating from the outside.

Also, the gasket protrusions are higher and narrower in width than other regions of the gasket on the same plane.

The body protruding portion is formed in a circumferential direction on the surface of the inner body portion of the main body portion which is in contact with the gasket, so that the gasket is closely attached to the transformer enclosure cover when the pressure reducing device is fixed at three points after the gasket is seated.

The gasket protruding portion is formed in a circumferential direction on one surface of the gasket that is in contact with the inner body portion of the main body portion so that the gasket can be closely contacted to the transformer enclosure cover when the pressure reducing device is fixed at three points after the gasket is seated.

A gasket protrusion corresponding to the body groove portion is formed on one surface of the gasket which is in contact with the inner body portion to prevent pressure drop when the gasket is in close contact with the rupture membrane. Prevent penetration.

Also. The gasket includes a gasket side projection portion protruding along the side circumferential direction of the gasket.

Further, the gasket includes a gasket lower projection protruding downward along a circumferential direction of the gasket.

The gasket lower protruding portion includes a first gasket lower protrusion protruded downward along a circumferential direction of the gasket, and a second gasket lower protrusion formed inside the first gasket lower protrusion.

Further, the lower protrusion of the first gasket has a higher protrusion height than the lower protrusion of the second gasket.

As described above, according to the present invention, it is possible to quickly reduce the instantaneous high-pressure power generated in the transformer through the hand hole of the transformer, and to effectively prevent the infiltration of impurities such as water into the transformer.

In addition, according to the present invention, the lid can be easily unlocked, so that the maintenance is simple and convenient.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, It should not be construed as limited.
1 is a perspective view of an instantaneous pressure reducing apparatus according to a first embodiment of the present invention,
2 and 3 are views showing a lid according to a first embodiment of the present invention,
4 is an exploded perspective view of the instantaneous pressure reducing apparatus according to the first embodiment of the present invention,
FIG. 5 is a view illustrating a coupling between the lid and the main body according to the first embodiment of the present invention,
6 is a cross-sectional view of the instantaneous pressure reducing apparatus according to the first embodiment of the present invention,
7 is a bottom view of the instantaneous pressure reducing apparatus according to the first embodiment of the present invention,
8 is a perspective view of the instantaneous pressure reducing apparatus according to the second embodiment of the present invention,
9 and 10 are views showing a lid according to a second embodiment of the present invention,
11 is an exploded perspective view of the instantaneous pressure reducing apparatus according to the second embodiment of the present invention,
12 is a view showing a coupling groove of a main body coupling part according to a second embodiment of the present invention,
13 is a cross-sectional view of the instantaneous pressure reducing apparatus according to the second embodiment of the present invention,
FIG. 14 is a view showing an instantaneous pressure reducing device and a cover according to a second embodiment of the present invention,
15 is a view showing a gasket protrusion according to a third embodiment of the present invention,
16 is a view showing a body protrusion according to a third embodiment of the present invention,
17 is a view showing a body groove part and a gasket projection part according to the third embodiment of the present invention,
18 and 19 are views showing that the pressure reducing device is coupled to the transformer enclosure cover,
20 (a), 20 (b) and 20 (c) are views showing the side projection portion, the lower projection portion, and the groove portion of the gasket according to the fourth embodiment of the present invention,
20 (a), 20 (b) and 20 (c) are views showing a side projection portion, a lower projection portion, a gasket groove portion, and a gasket projecting collar of a gasket formed on the upper side according to the fourth embodiment of the present invention,
21 (a), 21 (b) and 21 (c) are views showing side projections, lower protrusions and gasket projecting feathers of the gasket formed on the lower side according to the fourth embodiment of the present invention,
Figs. 22 (a), 22 (b) and 23 (a) and 23 (b) are views showing that the gasket according to the fourth embodiment of the present invention is seated on the transformer enclosure cover.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment described below does not unduly limit the content of the present invention described in the claims, and the entire structure described in this embodiment is not necessarily essential as the solution means of the present invention.

The pressure reducing device according to an embodiment of the present invention is coupled to a hand hole of a transformer to discharge internal air of the transformer to the outside when an abnormal pressure of the transformer is generated, thereby rapidly reducing the internal pressure of the transformer. Hereinafter, a pressure reducing apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

( 1st Example )

The first pressure reduction device 100 according to the first embodiment of the present invention is constituted by a lid 110, a main body 120 and a rupture plate 130. The first pressure reduction device 100 according to the first embodiment of the present invention is not limited to the technical idea of the present invention Additional components, including transformers, may be added. As shown in FIG. 1, the first pressure reduction device 100 is fastened to the hand hole of the transformer.

As shown in FIG. 2, the lid part 110 is substantially constituted by a body part 111, lid fastening parts 112, 113, 114 and 115, and a concave and convex part 117. 1 and 2, the body part 111 has a hexagonal shape which is easily grasped by the installer. The body part 111 is formed to have a smaller diameter than the main body part 120 and has a predetermined thickness and is formed hollow so that the lid fastening parts 112, 113, 114 and 115 and the concave and convex parts 117 can be arranged inside have.

The lid fastening portions 112, 113, 114, and 115 are provided at at least four points on the outermost inner side of the body portion 111. Thus, the lid fastening portions 112, 113, 114, and 115 are disposed at an approximately 90 degree angle. The lid fastening portions 112, 113, 114, and 115 are disposed at four points starting from the virtual circumferential surface. However, the number of the lid fastening portions 112, 113, 114, and 115 may be smaller or larger than four if necessary. The lid fastening portions 112, 113, 114, and 115 protrude downward from the upper surface of the inner lid portion, so that the lid fastening portion can be seen as a protrusion protruding in the longitudinal direction downward from the upper surface. The protrusions disposed at these four points are formed with threaded threads and threaded threads 112a and 113a, respectively. These threaded and threaded bosses 112a and 113a are fastened to threaded threads and threaded bosses 122a of the main body fastening portion described later. 3, support ribs 116a and 116b for supporting the first and third lid fastening parts 112 and 114 are provided in the space between the inner lid part and the lid fastening parts 112 and 114, respectively. The second and fourth lid fastening portions 113 and 115 are respectively supported on the inner rim of the body portion 111.

As shown in FIG. 2, the concave and convex portions 117 are spaced apart from the lid-locking portion by a certain distance from the inside of the inner lid portion. The concave and convex portion 117 is composed of a concave portion 117a and a convex portion 117b. The concavities and convexities 117a and 117b are formed so as to intersect with each other successively along the circumferential phase of the concavo-convex portion, and each of them is formed by four. The concave portion 117a is an internal air discharge groove for discharging the inside air of the transformer to the outside, and a step is formed as compared with the convex portion 117b. The convex portion 117b protrudes from the concave portion 117a to prevent the insulating oil of the transformer from being discharged to the outside. The convex portion 117b has a protruding length shorter than the lid engaging portion. The concave portion 117a is formed at at least four points so that the rupture plate is torn by the abnormal pressure of the transformer so that the inner air can be quickly discharged to all directions when the inner air of the transformer is moved upward from below. In addition, when the rupture plate is torn when an abnormal pressure of the transformer is generated, the insulation oil is moved upwardly from the lower side together with the inner air. At this time, the insulation oil can be prevented from being discharged to the outside by the convex portion 117b. The insulating oil does not discharge to the outside but falls back into the inside of the transformer by the convex portion 117b.

In order to prevent the insulating oil from being discharged to the outside, the concavo-convex portion can be configured in two stages. That is, the second concavo-convex portion (not shown) formed inwardly at a distance from the first concavo-convex portion 117 can be formed in the same manner as the first concavo-convex portion 117. It is preferable that the second concavo-convex portion is formed so that the sectional diameter is smaller than that of the first concavo-convex portion, and the concave portion and the convex portion of the first concavo-convex portion and the concave portion and the convex portion of the second concavo-convex portion are formed so as not to overlap each other Do. In other words, the convex portion of the first concavo-convex portion and the convex portion of the second concavo-convex portion do not face each other but are arranged to be shifted from each other at a predetermined angle, Preferably, the convex portion of the second concave-convex portion is arranged so as to overlap with the concave portion of the first concave-convex portion on the same line, so that the insulating oil can be prevented from being discharged to the outside from the circumferential side of the inner lid portion. If necessary, the concavo-convex portion may be constituted by two or more steps. The lid fastening portions 112, 113, 114, and 115 are arranged at an angle of 90 degrees so as to overlap with each other on the same line as the convex portion 117b.

As shown in FIG. 4, the main body 120 is fastened to the lid part from below the lid part 110. The main body part 120 is composed of a body part 121 and a main body coupling part 122. The body part 121 and the main body fastening part 122 have a circular cross section. The body portion 121 is formed at at least three points on the outer circumference at an angle of 120 degrees with the fixing portions 123, 124, and 125 formed thereon. Fixing holes 123a, 124a, and 125a are formed to fix the fixing portions 123, 124, and 125 to the fixing bolts of the hand holes, respectively.

The main body fastening part 122 has a diameter smaller than that of the body part 121 and protrudes upward from the central upper surface of the body part 121 for a predetermined length and has threads and threaded bosses 122a formed on the outer peripheral surface thereof. As shown in FIG. 5, threaded threads and threaded bosses 122a formed on the outer circumferential surface of the main body coupling part 122 are screwed to the first, second, third and fourth lid coupling parts 112, 113, 114 and 115, respectively.

The main body coupling part 122 is hollow and includes a horizontal support 126a provided across the diameter of the hollow main body coupling part 122 and a vertical support 126b disposed perpendicularly to the center point of the horizontal support 126a, A needle bar 126 is provided. The needle bar 126 tears the rupture plate 130 disposed under the needle bar 126 when an abnormality occurs in the internal pressure of the transformer. The inner air of the transformer is discharged upward from below through the ripped rupture plate 130, so that the internal pressure of the transformer can be quickly lowered. The tip of the vertical support 126b may be sharpened to tear the rupture plate 130.

The rupture plate 130 disposed inside the body portion 120 and disposed below the needle bar 126 is made of a material and thickness suitable for the internal pressure of the transformer. When the inner pressure of the transformer rises and the inner air needs to be discharged to the outside, the rupturing plate 130 is convex outward due to the internal abnormal pressure. In this case, the rupturing rod 126 is convex By tearing the point, the inside air is discharged to the outside.

A gasket 140 is disposed at the lower end of the rupture plate 130 to protect the rupture plate 130 as shown in FIG. The gasket 140 has a hollow inside (a central region is formed by a groove and an outer side of the central region is formed by a constant diameter and width). When an abnormal pressure is generated in the transformer, the rupture plate 130 is torn, Or the inner air is discharged to the outside.

( Second Example )

8, the second pressure reduction device 200 according to the second embodiment of the present invention is composed of a lid part 210, a main body part 220 and a rupture plate 230, Additional components, including transformers, may be added to the scope of the invention without departing from the spirit of the invention. The second pressure reduction device 100 is fastened to the hand hole of the transformer.

9 and 10, the lid part 210 is substantially constituted by a body part 211, lid fastening parts 212, 213 and 214, and a concave-convex part 217. [ As shown in FIG. 8, the body portion 211 is formed into a hexagonal dome shape that the installer easily grasps. The body part 211 is formed to have a smaller diameter than the body part 220 described later and has a predetermined thickness and is formed hollow so that the lid fastening parts 212, 213, and 214 and the concave and convex parts 217 can be disposed inside have.

The lid fastening portions 212, 213, and 214 are provided at at least three points on the outermost inner side of the body portion 211. Thus, the lid fastening portions 212, 213, and 214 are disposed at an angle of approximately 120 degrees. The lid fastening portions 212, 213, and 214 are disposed at three points starting from the virtual circumferential surface. However, if necessary, the number of lid fastening portions 212, 213, and 214 may be smaller or larger than three. The lid fastening portions 212,213 and 214 comprise a first protrusion 212a vertically protruding downward from the upper surface of the inner lid portion and a second protrusion 212b extending inwardly from the first protrusion 212a, Shaped. The second projecting portion 212b of the lid fastening portion disposed at these three points is fastened to the fastening groove 222a described later. 9, a support rib 216 for supporting the respective lid fastening portions 212, 213 and 214 is provided in the space between the inner lid portion and the lid fastening portions 212, 213 and 214.

As shown in FIGS. 9 and 10, the concave and convex portions 217 are spaced a predetermined distance from the lid engagement portion to the inside of the inner lid portion. The concave-convex portion 217 is composed of a concave portion 217a and a convex portion 217b. The recesses and protrusions 217a and 217b are formed so as to intersect with each other in order along the circumference of the recesses and protrusions, and are formed by three protrusions 217a and 217b, respectively. The concave portion 217a is an inner air discharge groove for discharging the inside air of the transformer to the outside, and a step is formed as compared with the convex portion 217b. The convex portion 217b protrudes from the concave portion 217a to prevent the insulating oil of the transformer from being discharged to the outside. The convex portion 217b has a protruding length shorter than that of the lid engaging portion. The concave portion 217a is formed at at least three points, whereby the rupture plate is torn by the abnormal pressure of the transformer, so that the inner air can be quickly discharged to all directions when the inner air of the transformer is moved upward from below. In addition, when the rupture plate is torn when an abnormal pressure of the transformer is generated, the insulating oil is moved upwardly from the lower side together with the inner air. At this time, the insulating oil can be prevented from being discharged to the outside by the convex portion 217b. The insulating oil does not discharge to the outside but falls back into the inside of the transformer by the convex portion 217b.

In order to prevent the insulating oil from being discharged to the outside, the concavo-convex portion can be configured in two stages. That is, the second concavo-convex portion 218 (see FIG. 13), which is spaced apart from the first concavo-convex portion 217 by a predetermined distance, can be formed in the same manner as the first concavo-convex portion 217. The second concavo-convex portion 218 is formed to have a smaller sectional diameter than the first concavo-convex portion, and the concave portion and the convex portion of the first concavo-convex portion and the concave portion and convex portion of the second concavo- . In other words, the convex portion of the first concavo-convex portion and the convex portion of the second concavo-convex portion do not face each other but are arranged to be shifted from each other at a predetermined angle, Preferably, the convex portion of the second concave-convex portion is arranged so as to overlap with the concave portion of the first concave-convex portion on the same line, so that the insulating oil can be prevented from being discharged to the outside from the circumferential side of the inner lid portion. If necessary, the concavo-convex portion may be constituted by two or more steps. The lid fastening portions 212, 213, and 214 are disposed at an angle of 120 degrees so as to overlap each other on the same line as the concave portion 217a. Preferably, the width of the first and second projecting portions 212a and 212b of the lid fastening portion is less than the width of the recess 217a.

As shown in FIG. 11, the main body 220 is fastened to the lid part from below the lid part 210. The body portion 220 is composed of a body portion 221 and a main body coupling portion 222. The body portion 221 and the main body fastening portion 222 have a circular cross section. The body portion 221 has the fixing portions 223, 224, 225 formed at an angle of 120 degrees on at least three points on the outer circumference. Fixing holes 223a, 224a, 225a are formed in the fixing portions 223, 224, 225 so as to be screwed to the fixing bolts of the hand holes, respectively.

The main body fastening part 222 has a diameter smaller than that of the body part 221 and protrudes upward from the central upper surface of the body part 221 by a predetermined length and has a fastening groove 222a formed on the outer peripheral surface thereof. The respective fastening grooves 222a formed on the outer circumferential surface of the main body fastening portion 222 are respectively engaged with the first, second and third lid fastening portions 212, 213, and 214 by sliding. The fastening groove 222a is formed at three points on the outer circumferential surface of the body fastening portion 222 at a 120 degree angle so as to be formed at a position corresponding to the position where the first, second and third lid fastening portions 212, 213 and 214 are formed. The fastening groove 222a is formed by being bent downward from the upper surface of the outer circumferential surface of the main body fastening portion 222 as shown in FIG. And the second projection 212b of the lid-fastening portion is easily inserted and slidable, and the second projection 212b is slidably inserted and fixed while the width becomes narrower toward the lower side. Therefore, the approximate shape of the fastening groove 222a may be "inverted shape ". However, the above-described fastening direction has been described with reference to the direction of the right-hand screw, but may be a "bush shape"

The body fastening portion 222 is hollow and includes a horizontal support 226a provided across the diameter of the hollow main body fastening portion 222 and a vertical support 226b disposed perpendicularly to the center point of the horizontal support 226a, A needle bar 226 is provided. The needle bar 226 tears the rupture plate 230 disposed under the needle bar 226 when an abnormality occurs in the internal pressure of the transformer. The inner air of the transformer is discharged upward from the lower side through the tear rupturing plate 230, so that the internal pressure of the transformer can be quickly lowered. The tip of the vertical support 226b may be sharpened to tear the rupture plate 230.

The rupture plate 230 disposed inside the main body 220 and disposed below the needle bar 226 is usually made of a material and a thickness suitable to withstand the internal pressure of the transformer. When the inner pressure of the transformer rises and the inner air needs to be discharged to the outside, the rupturing plate 230 is convex outward due to the internal abnormal pressure. In this case, the rupturing rod 226 is convex By tearing the point, the increased pressure or the internal air is discharged to the outside.

As shown in FIG. 13, an inclined surface 221a is formed on the inside of the body portion 221, so that the inside diameter becomes smaller as it goes from the lower side to the upper side as a whole. Therefore, when an abnormal pressure is applied to the transformer, when the inner air moves from the lower side to the upper side due to the tearing of the rupture plate, the inner air flows faster and the lowering of the pressure can be performed faster. So that the insulating oil is collected in the central region of the lid portion. The above description can also be applied to the instantaneous pressure reducing apparatus according to the first embodiment.

As shown in FIG. 14, the lid part 210 has a hexagonal dome shape. The hexagonal shape makes it easy for the user to grasp, and the dome shape allows the air discharged from the inside of the pressure reducing device to be gathered at the central portion so that the cover 10 covering the pressure reducing device can be easily opened.

( Third Example )

In the case where the fixing bolt is fastened to the fixing hole of the first and second embodiments, the fixing ring 11 of the cover 10 is fixed to any one of the fixing portions (for example, the first fixing portion 223 in Fig. 14) It is fastened together. In this case, when the fixing bolts at three points are fastened, the first fixing portion 223 of FIG. 14 may be exposed to the enclosure cover of the transformer compared to the other two points corresponding to the thickness of the fixing ring 11, This is because the enclosure cover of the transformer is not flat and rounded. At this time, if the first fixing portion 223 is more tightly locked than the other two points, the fixing ring 11 may be damaged.

Therefore, in any one of the fixing portions of the first and second embodiments, a step (or a height difference) is formed by the thickness of the fixing ring 11 of the cover 10 covering the pressure reducing device so that the fixing portions 223, The fixing bolts of the hand holes that are fixed to the screw holes can be screwed with the same force. That is, the first fixing part 123 shown in FIG. 6 is formed to have a height higher than that of the second fixing part 124 (i.e., a height difference equal to the thickness of the fixing ring 11 of the cover) A thickness of the fixing ring 11 of the cover is formed by the difference in height between the bottom surface of the first fixing portion 123 and the bottom surface of the second fixing portion 124. [ Such a step may also be formed as shown in FIG. 13 in the fixed portion of the instantaneous pressure reducing apparatus according to the second embodiment.

On the other hand, when fixing the fixing bolt at three points after attaching the pressure reducing device to the outer cover of the transformer, the fixing bolt part is slightly opened by the force of tightening the outer cover cover of the transformer at three points. Since the enclosure cover of the transformer is not made flat but made round (or the upper surface of the enclosure cover has a curved line), the lower surface of the main body 320 and the enclosure cover or gasket of the transformer contacting the transformer are excited There is a fear that moisture may penetrate. Therefore, as shown in FIG. 15, a gasket protruding vane 341 is formed in the gasket 340 to prevent moisture infiltration. The gasket protruding vanes 341 are formed to have a constant width d2 and a constant height h2 in the circumferential direction of the gasket 340. A groove is formed in the central region of the gasket 340 so that the dielectric oil and the inner pressure of the inner side of the transformer pass upward and has a constant width d1 and a height h1 outside the central region. The height of the gasket protruding vane 341 is higher than the height h1 of the gasket by a predetermined height h2 and the width of the gasket protruding vane 341 is narrower than the width d1 of the gasket. The cross-sectional shape of the gasket 340 is "circle" or "ellipse" The height of the gasket protruding collar 341 may be approximately 3 to 10 mm, but the numerical value may be varied depending on the manufacturing environment.

When the pressure reducing device is attached to the outer cover of the transformer, the gasket 340, which is spaced a certain distance from the fixing bolt, is less tightly attached to the outer cover of the round transformer when the fixing bolt is fixed at the third point than the gasket 340 around the fixing bolt . That is, the gasket area where the fixing bolts at the three points are tightly tightened closely to the transformer enclosure cover by tightening the fixing bolts, and the gasket area between each fixing points is slightly spaced from the transformer enclosure cover. This is because when the transformer cover of the transformer is rounded and the fixing bolt is tightened at three points, the transformer cover of the round transformer is floated between the points. In order to solve such a problem, the inner protrusion (body protrusion 321a) is formed in the inner circumferential direction of the body portion 321 contacting with the gasket 340. [ The inner protrusion 321a is formed in a circumferential direction on the inner body portion 321 which is in contact with the gasket 340 as shown in Fig. A seat space 322 in which the gasket 340 is seated is formed inside the body part 321 and a gasket 340 is seated in the seating space 322. The gasket 340 is fitted to the casing cover direction of the transformer (downward when the instantaneous pressure reducing device is installed) by the inner protrusion 321a formed in the circumferential direction when the gasket is seated in the seating space 322 and tightened at the three points by the fixing bolt, So as to be more closely contacted between the gasket and the enclosure cover. The inner protrusion 321a protrudes in the direction of the seating space 322 so that the gasket 340 is slightly excited by the protrusion height of the inner protrusion 321a when the gasket 340 is seated in the seating space 322. [ The inner protrusion 321a may be formed in the gasket 340 in the circumferential direction without forming the inner protrusion 321a inside the body part. At this time, the inner protrusion formed on the gasket protrudes in a direction in contact with the inside of the body. The protrusion height of the inner protrusion is preferably about 1 to 3 mm, but it may have various protrusion heights depending on the manufacturing environment. The inner protrusion 321a is formed in a circumferential direction with a predetermined width and thickness in a substantially central region inside the body portion in contact with the gasket. At this time, the protrusion height may be constant, the protrusion height may not be constant, and the protrusion height may be rounded.

The gaskets 140 and 240 shown in FIGS. 4 and 11 have a cylindrical structure (cross section is "circle") in which a central region is formed as a groove, one surface being in intimate contact with the enclosure cover of the transformer and the other surface being in intimate contact with the rupture plates 130 and 230 . At this time, when the gasket is in close contact with the rupture plate, the pressure inside the transformer may leak out into the space between the gasket and the rupture plate. 17, a body groove portion 421a is formed in the inner central region of the main body body portion 421 in contact with the gasket 440 in the circumferential direction, and the gasket portion 440 The gasket protrusion 441 is formed at a position corresponding to the body groove portion 421a to prevent pressure drop. The shape of the body groove portion 421a is such that a round groove is formed in a direction in which the gasket 440 closely contacts the rupture plate and a gasket projection portion 441 is seated in the body groove portion 421a. The gasket protrusion 441 has a round shape on one surface or the entire surface in the circumferential direction. However, the body groove portion 421a may be a round groove or a rectangular groove formed in one direction. The gasket protrusion 441 has a shape corresponding to the body groove portion 421a. However, if necessary, the inner body portion 421 may have a protrusion (formed in the direction of the transformer enclosure cover at this time), and a groove portion may be formed in the gasket 440.

The above-described gasket may be a moisture-proof rubber pack made of a rubber material, which is a cylindrical shape having two steps and a step difference. However, the gasket may be made of various materials capable of achieving such functions by preventing the internal pressure from falling out and preventing moisture penetration from the outside into the pressure reducing device. The third embodiment can be applied to both the pressure reducing apparatuses of the first and second embodiments.

( Fourth Example )

The pressure reducing apparatuses 100 and 200 are coupled and fixed to the transformer enclosure cover (pressure reducing apparatus mounting base, 510 and 520) as shown in Figs. 18 and 19. The transformer enclosure cover 510 shown in Fig. 18 has a surface on which the pressure reducing device is placed roughly stepwise, and the transformer enclosure cover 520 shown in Fig. 19 has a surface on which the pressure- And is formed in a round shape. The gasket protruding vanes 341 described in the third embodiment prevent moisture infiltration from the outside when the pressure reducing device of Figs. 18 and 19 is fixedly engaged with the transformer enclosure cover.

20 (a), a gasket side protrusion 342 is formed on the circumferential surface of the gasket 340 along the circumferential direction. Although the gasket lateral protrusion 342 is shown on the upper circumferential surface of the gasket in FIG. 20, it is preferable that it is formed on the lower circumferential surface of the gasket as shown in FIG. However, the position where the gasket side protrusion 342 is formed may be variously formed according to the installation environment (or position) of the transformer enclosure cover. 20 and 21 are different from each other in that the gasket side projection portion 342 is formed and the gasket groove portion 344 is not formed, and the rest are the same. The gasket lateral protrusion 342 according to an embodiment of the present invention improves the adhesion between the rupturable membrane and the gasket to prevent the rupturable membrane from moving and prevent the rupturable membrane from being released by the external impact at the body portion 221. [ Further, the airtightness is maintained by the improvement of the adhesion, and moisture permeation from the outside can be prevented.

As shown in FIG. 20 (b), first and second gasket lower protrusions 343a and 343b and a gasket groove 344 are formed on the lower surface of the gasket 340. The first and second gasket lower protrusions 343a and 343b are protrusions having a predetermined width and height along the circumferential direction of the lower surface of the gasket. The first gasket lower protrusion 343a is located on the outer side relative to the second gasket lower protrusion 343b and is formed to have a higher protrusion height than the second gasket lower protrusion 343b. The transformer enclosure cover 510 shown in FIG. 18 is formed such that the coupling surface to be engaged with the pressure reducing device is inclined (refer to FIGS. 22 and 23), and the first and second gasket lower protrusions 343a And 343b are different from each other. The widths of the first and second gasket lower protrusions 343a and 343b may be the same or may be set differently depending on the situation. The distance between the first and second gasket lower protrusions 343a and 343b may be variously changed according to the installation environment. The gasket groove portion 344 shown in FIG. 20 (c) is a mounting groove for allowing the gasket to be seated on the round-type transformer housing cover 520 as shown in FIG. However, in the case of the stepped transformer case cover 510 as shown in FIG. 18, the instantaneous pressure reducing device having the gasket groove portion 244 as shown in FIG. 20 may be used. It is preferable to use an instantaneous pressure reducing device in which the gasket groove portion 344 is not formed but is formed flat and in a shape of a magnetic field. The gasket protruding diaphragm 341 primarily prevents water infiltration from the outside, and the first and second gasket lower protrusions 343a and 343b secondarily and sequentially prevent such moisture infiltration.

22 is a view showing that the gasket 340 is seated on the stepped transformer enclosure cover 510 and FIG. 23 is a view showing that the gasket 340 is seated on the round transformer enclosure cover 520. FIG. When the pressure reducing device is coupled to the transformer enclosure cover, the pressure reducing device is further pressed and joined to each other by the projecting height of the first and second gasket lower protrusions 343a and 343b, thereby further enhancing airtightness.

The configuration and functions of the above-described components have been described separately from each other for convenience of description, and any of the components and functions may be integrated with other components or may be further subdivided as needed.

Although the present invention has been described with reference to the embodiment thereof, the present invention is not limited thereto, and various modifications and applications are possible. In other words, those skilled in the art can easily understand that many variations are possible without departing from the gist of the present invention. In the following description, well-known functions or constructions relating to the present invention as well as specific combinations of the components of the present invention with respect to the present invention will be described in detail with reference to the accompanying drawings. something to do.

10: cover
11: Cover ring (fixing ring)
100: first pressure reducing device
110: lid part
111:
112: first lid fastening portion (protruding portion)
112a: threads and threads
113: second lid fastening portion
113a: Threads and threads
114: Third lid fastening part
115: Fourth lid fastening part
116a: first supporting rib
116b: second supporting rib
117: concave and convex portion
117a:
117b:
120:
121: Body part
122: main body fastening portion
122a: threads and threads
123: first fixing unit
123a: first fixing hole
124: Second fixing portion
124a: second fixing hole
125: Third Fixing Section
125a: third fixing hole
126: Needle bar
126a: Horizontal support
126b: vertical support
130: Rupture plate
140: Gasket
200: second pressure reducing device
210:
211: Body part
212: first lid fastening portion
212a: first projection (vertical portion)
212b: second projecting portion (horizontal portion)
213: second lid fastening part
214: Third lid fastening part
216: first support rib
217: First concave /
217a:
217b:
218: second concave /
220:
221: Body part
221a:
222: main body fastening portion
222a: fastening groove
223:
223a: first fixing hole
224:
224a: second fixing hole
225: third fixing unit
225a: third fixing hole
226: Spit bar
226a: horizontal support
226b: vertical support
230: Rupture plate
240: Gasket
310:
320:
321:
321a: body protrusion
322: Gasket seating space
330: Rupture plate
340: Gasket
341: gasket protruding collar
342: Gasket side projection
343a: first gasket lower projection
343b: the second gasket lower projection
344: Gasket groove
421: Body part
421a: body groove
440: Gasket
441: Gasket protrusion
510,520: Transformer enclosure cover

Claims (11)

Lid portion,
A main body portion coupled to the lid portion and having a needle bar,
A rupture plate positioned below the needle bar and tearing by the needle bar when an abnormal pressure is generated inside to discharge the inner air or the increased pressure to the outside;
A gasket positioned below the rupture disc, and
Further comprising a cover,
Wherein a gasket protruding vane having a height difference in a circumferential direction is formed on an outermost circumferential surface of the gasket to prevent water infiltration from the outside.
The method according to claim 1,
Wherein a stepped portion is formed in the fixing portion of the main body portion fixedly coupled to the cover by a thickness of the fixing ring of the cover.
The method according to claim 1,
And a seating space in which the gasket is seated is formed in an inner body portion of the body portion.
The method of claim 3,
The gasket projecting collar
Is higher on the same plane than the other region of the gasket and narrower in width.
The method according to claim 1,
Wherein a body protruding portion is formed in a circumferential direction on a surface of the inner body portion of the main body portion which is in contact with the gasket so as to closely contact the gasket in the direction of the cover of the transformer enclosure when the pressure reducing device is fixed at three points after the gasket is seated. Abatement device.
Lid portion,
A main body portion coupled to the lid portion and having a needle bar,
A rupture plate positioned below the needle bar and tearing by the needle bar when an abnormal pressure is generated inside to discharge the inner air or the increased pressure to the outside;
And a gasket positioned below the rupture plate,
The gasket protrusion is formed in a circumferential direction on one surface of the gasket which is in contact with the inner body portion of the main body portion so that the gasket is closely contacted to the transformer enclosure cover when the pressure reducing device is fixed at three points after the gasket is seated. Pressure reducing device.
The method according to claim 6,
Wherein the inner body portion of the body portion is formed with a body groove portion in a circumferential direction,
Wherein the gasket protrusion is formed to correspond to the body groove portion, thereby preventing pressure drop during close contact with the rupture plate, and preventing moisture infiltration from the outside.
Lid portion,
A main body portion coupled to the lid portion and having a needle bar,
A rupture plate positioned below the needle bar and tearing by the needle bar when an abnormal pressure is generated inside to discharge the inner air or the increased pressure to the outside;
And a gasket positioned below the rupture plate,
In the gasket,
And a gasket side protrusion protruding along the side circumferential direction of the gasket.
9. The method of claim 8,
In the gasket,
And a gasket lower protrusion protruded downward along a circumferential direction of the one surface of the gasket.
10. The method of claim 9,
The gasket lower protruding portion
A first gasket lower protrusion protruded downward along a circumferential direction of the gasket,
And a second gasket lower protrusion formed on the inner side of the first gasket lower protrusion.
11. The method of claim 10,
Wherein the first gasket lower protrusion has a higher protrusion height than the second gasket lower protrusion.

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