KR101556572B1 - Respiratory-mounted drying power transformer - Google Patents

Respiratory-mounted drying power transformer Download PDF

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Publication number
KR101556572B1
KR101556572B1 KR1020150061098A KR20150061098A KR101556572B1 KR 101556572 B1 KR101556572 B1 KR 101556572B1 KR 1020150061098 A KR1020150061098 A KR 1020150061098A KR 20150061098 A KR20150061098 A KR 20150061098A KR 101556572 B1 KR101556572 B1 KR 101556572B1
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KR
South Korea
Prior art keywords
heater
pipe body
control panel
outer cylinder
transformer
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KR1020150061098A
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Korean (ko)
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KR20150073891A (en
Inventor
심민섭
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주식회사 신흥전력
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Priority to KR1020150061098A priority Critical patent/KR101556572B1/en
Publication of KR20150073891A publication Critical patent/KR20150073891A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means
    • H01F2027/404—Protective devices specially adapted for fluid filled transformers

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Drying Of Gases (AREA)

Abstract

The present invention relates to a respirator having a drying function of a power transformer and includes an outer cylinder 100, an oil cup 14 assembled to the lower end of the outer cylinder 100, A power transformer comprising a top flange (130), a grill (110) provided in the outer cylinder (100), and a silica gel (120) stacked on the grill (110) In the respiratory tract; A heater 200 is installed on the upper surface of the grill 110; The heater (200) is electrically connected to a control panel (P) of the transformer; A timer T is mounted on the control panel P so that the heater 200 periodically generates heat; The water exhaust unit 300 further includes an exhaust pipe body 310 having a predetermined length and a drain pipe 310 having a predetermined length and being connected to the exhaust pipe body 310 at a part of the length of the exhaust pipe body 310. [ And a branch pipe (320) connected vertically; A first solenoid valve (330) electrically connected to the control panel (P) is installed on the exhaust pipe body (310) passing the branching point of the branch pipe body (320) A second solenoid valve 340 electrically connected to the control panel P is installed in a part of the length of the branch tube 320 so that the first and second solenoid valves 330 and 340 operate in opposite directions to each other; The end portion of the branch tube 320 is downwardly installed and further provided with an intake air shutoff port 350 in which the airtight shutoff port 350 is a cylindrical member, (352) and a check valve (354) for blocking the reverse flow of the outside air.

Description

[0001] The present invention relates to a respiratory-mounted drying power transformer for a power transformer,

The present invention relates to a respirator having a drying function of a power transformer, and more particularly, to a respirator having a drying function of a power transformer that increases the performance of a respirator by adding a drying function to a respirator used in a power transformer It is about the respiratory system.

The transformer installed to raise or lower the voltage in the transmission and distribution line is filled with insulating oil so as to prevent the insulation strength from dropping due to moisture or dust in the transformer and to prevent the heat generated in the winding from being dissipated by convection or radiation of oil .

The transformer is equipped with a respirator to prevent the transformer from being damaged or exploded because the insulation oil inside the transformer and the air above the insulation oil shrink or expand according to the ambient temperature around the transformer.

The respirator plays a role to prevent expansion of the transformer due to the temperature change when the temperature of the insulation oil in the transformer rises or falls due to the load fluctuation of the power transformer and the weather change, and to prevent foreign substances (moisture, etc.) from being introduced.

To this end, the respirator includes an oil cup containing oil for sedimenting foreign substances contained in the outside air, and a dehumidifying chamber filled with a dehumidifying agent on the upper portion of the oil cup, so that foreign substances contained in the outside air are filtered while passing through the oil cup, The moisture is removed and configured to communicate with the transformer.

Prior art related to such a respirator is disclosed in a number 0291557 (2002.09.27), No. 0299929 (2002.12.20), and No. 0367537 (November 11, 2004), which are registered in the registry.

1 and 2, the conventional respirator 10 includes an upper flange 11 coupled to the transformer connecting means 6 communicating with the upper portion of the transformer and forming an upper portion of the dehumidifying chamber 10A, An outer body 12 formed of a transparent body so as to observe the color change of the dehumidifying agent 2 and forming an outer wall of the dehumidifying chamber 12 and an oil cup 14 coupled to a lower portion of the outer body 12 A coupling means including a bolt 15a and a nut 15b for fastening and assembling the lower flange 13 to the upper flange, the outer cylinder and the lower flange, the oil cup 14 and the oil cup 14, And a fastener (16) for fastening the fastener (16).

The dehumidifying chamber 10A is provided with a grill 17 for receiving the dehumidifying agent 2 and has a penetrating portion 11a extending from the dehumidifying chamber to the transformer connecting means 6. The oil cup 14 A plurality of recesses 14a are formed at the upper end so that the outside air is allowed to enter and exit through the recesses.

In the respiratory apparatus 10 having such a configuration, the outside air introduced through the groove 14a of the oil cup 14 passes through the oil 3 contained in the oil cup 14, so that the foreign matter is filtered and then the dehumidification chamber 10A The moisture is removed while communicating with the transformer 5 through the penetration portion 11a of the upper flange 11 so that the transformer 5 can breathe.

Nonetheless, recent weather fluctuations, such as repeated heat and cold, are also affecting the respiratory tract, raising concerns about water penetration.

As described above, when moisture permeates, the built-in desiccant, that is, the silica gel, changes from blue to black while eating moisture. In such a case, it is necessary to separate and regenerate the moisture. Since the period is shortened, maintenance and maintenance are troublesome.

In particular, if the regeneration of silica gel is frequent, the lifespan is shortened, which leads to an increase in cost. If the silica gel is not managed, moisture penetrates into the transformer and insulation breakdown phenomenon occurs. .

Therefore, it is inevitable to introduce a new concept of moisture barrier structure which can completely prevent such phenomenon.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems in the prior art, and it is therefore an object of the present invention to provide a water treatment apparatus and a water treatment method which can prevent water from penetrating into a transformer by heating and evaporating even if minute water leaks, The present invention has a main purpose of providing a dry type function type respirator of a power transformer capable of extending service life of silica gel as a dehumidifying agent.

The present invention provides an outer cylinder 100 that includes an oil cup 14 assembled to a lower end of the outer cylinder 100 and an upper flange 110 coupled to an upper end of the outer cylinder 100, A grill 110 provided in the outer cylinder 100 and a silica gel 120 laminated on the grill 110 and filled in the outer cylinder 100, ; A heater 200 is installed on the upper surface of the grill 110; The heater (200) is electrically connected to a control panel (P) of the transformer; A timer T is mounted on the control panel P so that the heater 200 periodically generates heat; The water exhaust unit 300 further includes an exhaust pipe body 310 having a predetermined length and a drain pipe 310 having a predetermined length and being connected to the exhaust pipe body 310 at a part of the length of the exhaust pipe body 310. [ And a branch pipe (320) connected vertically; A first solenoid valve (330) electrically connected to the control panel (P) is installed on the exhaust pipe body (310) passing the branching point of the branch pipe body (320) A second solenoid valve 340 electrically connected to the control panel P is installed in a part of the length of the branch tube 320 so that the first and second solenoid valves 330 and 340 operate in opposite directions to each other; The end portion of the branch tube 320 is downwardly installed and further provided with an intake air shutoff port 350 in which the airtight shutoff port 350 is a cylindrical member, (352) and a check valve (354) for blocking the reverse flow of the outside air.

At this time, the heater 200 is a replaceable glass tube heater 200 '; A through hole 140 is formed in a part of the outer cylinder 100 and a fitting pipe 150 having a step 152 is fitted in the through hole 140 at a part of an inner diameter of the through hole 140, The glass tube heater 200 'is inserted and the other end of the glass tube heater 200' is hermetically sealed by the step 152 and the glass tube heater 200 ' The opening portion of the fitting pipe 150 is sealed with a sealing cap 160 made of a rubber material having elasticity so as to have a secondary sealing structure.

According to the present invention, since water is completely blocked, it is possible to prevent an accident of equipment and extend the service life of the silica gel as a dehumidifying agent.

1 is an illustration of a respirator according to the prior art.
Figure 2 is an exemplary cross-sectional view of Figure 1;
3 is an illustration of an example of a drying-type respirator of a power transformer according to the present invention.
FIG. 4 is a view illustrating an example of a deformed shape of a respirator having a drying function of a power transformer according to the present invention.

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

Before describing the present invention, the following specific structural or functional descriptions are merely illustrative for the purpose of describing an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention may be embodied in various forms, And should not be construed as limited to the embodiments described herein.

In addition, since the embodiments according to the concept of the present invention can make various changes and have various forms, specific embodiments are illustrated in the drawings and described in detail herein. However, it should be understood that the embodiments according to the concept of the present invention are not intended to limit the present invention to specific modes of operation, but include all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.

As shown in FIG. 3, the drying type respirator of the power transformer according to the present invention includes a heater 200 capable of generating heat inside the outer cylinder 100.

At this time, the same oil cup 14 (see FIG. 1) is coupled to the lower end of the outer cylinder 100.

The heater 200 is configured to be electrically connected to the control panel P of the transformer and generate heat under the control of a control unit (a kind of microprocessor) mounted on the control panel P.

Particularly, it is preferable that the heater 200 is arranged on the upper surface of the grill 110, and the desiccant, that is, the silica gel 120 is filled on the heater 200.

Generally, although the silica gel 120 has been mentioned in the prior art, the color of the silica gel 120 changes from blue to black when it absorbs moisture, and when the moisture is evaporated by heat, the silica gel 120 is changed to blue and regenerated.

Therefore, when the heater 200 applies heat to the uppermost portion of the stacked silica gel 120, the heat of the silica gel 120 can be increased and the entire silica gel 120 can be heated. . That is, the regeneration time of the silica gel 120 can be shortened.

Of course, since the silica gel 120 loaded in the outer cylinder 100 is in a state in which water is almost shut off, there is no significant change. However, in the present invention, even the minute moisture can be completely dehumidified and the unexpected transformer explosion accident can be completely The structure of the heater 200 as described above is provided.

In addition, the wiring for power connection can be sufficiently sealed by using the assembled portion of the upper flange 130 without breaking the wire, so a description thereof will be omitted.

In the meantime, the heat generated by the heater 200 evaporates the water absorbed in the silica gel 120. In this case, since the evaporated water can not be introduced into the transformer, the moisture exhaust unit 300 is installed in the upper flange 130, Is installed.

The moisture exhaust unit 300 includes an exhaust pipe body 310 having a predetermined length and a branch pipe body 320 connected to a part of the length of the exhaust pipe body 310 in a vertical direction.

At this time, a coupling flange 312 for coupling with the upper flange 130 provided at the upper end of the outer cylinder 100 is provided at the lower end of the exhaust pipe body 310, and a connection flange 314 are provided.

Therefore, by using the coupling flange 312 and the connection flange 314, the moisture exhaust unit 300 can be easily installed.

Of course, the flange joints are tightly sealed.

A first solenoid valve 330 is provided on the exhaust pipe 310 at a position near the connection flange 314 after the branch pipe 320 is branched.

The first solenoid valve 330 is a means for finally interrupting the flow of water to the transformer by selective opening and closing and is electrically connected to the control panel P to be opened and closed.

In addition, a second solenoid valve 340 is installed in a part of the length of the branch tube 320. The second solenoid valve 340 is also electrically connected to the control panel P so as to be opened and closed, 1 solenoid valve 340, as shown in FIG.

The control panel P is provided with a timer T and the control unit mounted on the control panel P according to the operation of the timer T activates the heater 200 for a predetermined period of time The first solenoid valve 330 is closed and the second solenoid valve 340 is opened. When the operation of the heater 200 is stopped, the second solenoid valve 330 is opened, The solenoid valve 340 is closed and the first solenoid valve 330 is controlled to be open.

The water evaporated from the inside of the outer cylinder 100 due to the heat generated by the heater 200 is discharged to the outside through the branch tube 320 so that no internal moisture is left and the first solenoid valve 330 is connected to the transformer. The transformer can be safely protected.

In addition, the end of the branch tube 320 must be piped downward to prevent the branch tube 320 from flowing when the snow, rain, etc. come.

Particularly, in the present invention, in addition to merely bending in a downward direction, an intake block 350 can be further installed, which can be screwed on and detached from the end of the branch pipe 320.

The air intake port 350 is a cylindrical member to prevent the outside air from flowing backward through the end of the branch tube 320. In order to block moisture when a small amount of outside air flows backward, a dehumidifying agent tank 352 And a check valve 354 is fixed to the outside of the dehumidifying agent cylinder 352 on the lower side in the drawing to form one set.

At this time, the check valve 354 is a kind of diaphragm which is a one-way opening / closing valve that is opened to the outside discharge side and is blocked to the outside outside air inflow side.

In this case, the outside air itself flowing backward through the open end of the branch tube 320 can be completely blocked, so that there is no fear that water will leak.

In addition, the heater 200 may be configured to be replaceable as shown in FIG.

For example, since the heater 200 may cause deterioration when it is used for a long time, the heater 200 may be replaced so that the lifetime of the heater 200 can be further extended.

If the heater 200 has a replaceable structure, it is preferable that the heater 200 uses a glass tube heater 200 '.

The glass tube heater 200 'is a type in which a heater is built in the inside of the tube, and is a heater that is widely used mainly for a defrosting in a refrigerator or the like.

The replacement of the glass tube heater 200 'is performed by forming a through hole 140 in a part of the outer cylinder 100 and a fitting tube 150 having a step 152 in a part of the inner diameter of the through tube 140 And the glass tube heater 200 'is inserted into the fitting tube 150 so that the other end of the glass tube heater 200' can be firstly sealed while being caught by the step 152, Can be configured.

Particularly, when the glass tube heater 200 'is fully inserted into the fitting tube 150 and the opening of the fitting tube 150 is closed with a rubber sealing cap 160 having elasticity, Since it has a double sealing structure by sealing, moisture inflow by leakage can be completely blocked.

Such a structure is merely an example. In another modification, the glass tube heater 200 'can be replaced with a system in which the door is formed in the outer cylinder 100 and the door is opened and closed, to be.

As described above, according to the present invention, the leakage gas is completely blocked, and even if a small amount of water flows into the heater 200, the heater 200 is periodically heated and evaporated before the moisture flows into the transformer, It is possible to obtain an effect that the driving safety of the transformer is remarkably increased.

100: External cylinder 200: Heater
300: Water exhaust unit

Claims (2)

An oil cup 14 assembled to a lower end of the outer cylinder 100; an upper flange 130 coupled to an upper end of the outer cylinder 100; And a silica gel (120) stacked on the grill (110) and filled in the outer cylinder (100), the respirator of the power transformer comprising:
A heater 200 is installed on the upper surface of the grill 110;
The heater (200) is electrically connected to a control panel (P) of the transformer;
A timer T is mounted on the control panel P so that the heater 200 periodically generates heat;
The moisture exhaust unit 300 is further connected between the upper flange 130 and the transformer,
The moisture exhaust unit 300 includes an exhaust pipe body 310 having a predetermined length and a branch pipe body 320 connected to a part of the length of the exhaust pipe body 310 in a vertical direction; A first solenoid valve (330) electrically connected to the control panel (P) is installed on the exhaust pipe body (310) passing the branching point of the branch pipe body (320) A second solenoid valve 340 electrically connected to the control panel P is installed in a part of the length of the branch tube 320 so that the first and second solenoid valves 330 and 340 operate in opposite directions to each other;
The end portion of the branch tube 320 is downwardly installed and further provided with an intake air shutoff port 350 in which the airtight shutoff port 350 is a cylindrical member, (352) and a check valve (354) for blocking the reverse flow of the outside air.
The method of claim 1,
The heater 200 is a replaceable glass tube heater 200 ';
A through hole 140 is formed in a part of the outer cylinder 100 and a fitting pipe 150 having a step 152 is fitted in the through hole 140 at a part of an inner diameter of the through hole 140, The glass tube heater 200 'is inserted and the other end of the glass tube heater 200' is hermetically sealed by the step 152 and the glass tube heater 200 ' Wherein the open end of the fitting pipe (150) is closed with a rubber sealing cap (160) having elasticity so as to have a secondary sealing structure.
KR1020150061098A 2015-04-30 2015-04-30 Respiratory-mounted drying power transformer KR101556572B1 (en)

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KR101556572B1 true KR101556572B1 (en) 2015-10-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101942458B1 (en) 2018-08-30 2019-01-25 주식회사 광해전력 Respirators used in power transformers for cooling insulation oil

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CN107993811A (en) * 2017-11-29 2018-05-04 国网浙江省电力公司宁波供电公司 The extension tube of for transformer breathing equipment
CN108597782B (en) * 2018-06-20 2024-03-26 国网江苏省电力有限公司泰州供电分公司 Transformer respirator
CN108831698B (en) * 2018-06-20 2024-03-26 国网江苏省电力有限公司泰州供电分公司 Oil immersed transformer with processing device
CN109003789A (en) * 2018-08-01 2018-12-14 湖北科技学院 A kind of transformer breather of automatic dehumidifying
CN109087786B (en) * 2018-08-13 2023-09-05 国网湖北省电力公司咸宁供电公司 Respirator for transformer and silica gel regeneration method in respirator
CN109346282B (en) * 2018-11-20 2024-01-26 国网河南省电力公司孟津县供电公司 Numerical control drying maintenance-free transformer respirator
KR101966069B1 (en) * 2018-12-18 2019-04-05 주식회사 메가파워 Power transformer with tap automatic switching device
CN109702686B (en) * 2019-01-15 2020-02-18 浙江金冠特种变压器有限公司 Device for disassembling oil cup of transformer respirator
CN112582145B (en) * 2020-12-23 2024-09-06 国家电网有限公司 Device is changed to transformer respirator silica gel is electronic
KR102635558B1 (en) * 2023-05-31 2024-02-07 손현성 Respirator of a oil transformer equipped with a means of hydrogen measurement
CN118197753B (en) * 2024-05-20 2024-09-03 淄博炳砚电气设备有限公司 Intelligent transformer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3029706B2 (en) 1991-07-17 2000-04-04 株式会社東芝 Ultrasound diagnostic equipment
KR200299929Y1 (en) 2002-10-18 2003-01-08 박정준 A gram type breather of transformer
JP2012151144A (en) 2011-01-14 2012-08-09 Chugoku Electric Power Co Inc:The Moisture-absorbing respirator and moisture-absorbing respiration device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3029706B2 (en) 1991-07-17 2000-04-04 株式会社東芝 Ultrasound diagnostic equipment
KR200299929Y1 (en) 2002-10-18 2003-01-08 박정준 A gram type breather of transformer
JP2012151144A (en) 2011-01-14 2012-08-09 Chugoku Electric Power Co Inc:The Moisture-absorbing respirator and moisture-absorbing respiration device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101942458B1 (en) 2018-08-30 2019-01-25 주식회사 광해전력 Respirators used in power transformers for cooling insulation oil

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