KR101854758B1 - Pressure reducing valve for electric transformer with non-power valve open and close sensing function - Google Patents

Pressure reducing valve for electric transformer with non-power valve open and close sensing function Download PDF

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Publication number
KR101854758B1
KR101854758B1 KR1020170010597A KR20170010597A KR101854758B1 KR 101854758 B1 KR101854758 B1 KR 101854758B1 KR 1020170010597 A KR1020170010597 A KR 1020170010597A KR 20170010597 A KR20170010597 A KR 20170010597A KR 101854758 B1 KR101854758 B1 KR 101854758B1
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KR
South Korea
Prior art keywords
valve
pressure
opening
transformer
shaft
Prior art date
Application number
KR1020170010597A
Other languages
Korean (ko)
Inventor
양대연
구양서
Original Assignee
한국알프스 주식회사
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Priority to KR1020170010597A priority Critical patent/KR101854758B1/en
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Publication of KR101854758B1 publication Critical patent/KR101854758B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0025—Electrical or magnetic means
    • F16K37/0041—Electrical or magnetic means for measuring valve parameters
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • 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

Abstract

A pressure-proof valve module for a transformer having a non-powered valve opening / closing detection function is disclosed. The pressure-proof valve module according to an embodiment of the present invention includes a pressure-proof valve that is tightened at a predetermined position of the transformer enclosure and functions to lower the internal pressure when the internal pressure of the transformer rises above a set pressure, And includes a valve opening detecting portion for detecting the opening of the pressure-proof valve and transmitting the detected opening information to the outside through the communication module wirelessly, and an interlocking member for interlockingly connecting the valve shaft of the pressure- The valve opening detection unit detects the opening of the pressure-proof valve as a non-power source through an electromagnetic induction type detection switch that operates the armature by the interlocking member to generate a predetermined electric signal when the pressure- By wirelessly transmitting to the external control room via the communication module, It can be a base so that one can determine whether or not the time come remotely.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pressure-reducing valve module for a transformer having a non-powered valve opening /

The present invention relates to a pressure-proof valve module for a transformer, and more particularly, to a pressure-proof valve module for a transformer, in which, when a pressure inside a transformer exceeds a predetermined pressure, instantaneous pressure is released to prevent deformation or breakage of an enclosure of the transformer, To a pressure control valve module for a transformer having a non-powered valve opening / closing detection function that can detect and transmit detected information to an external control room via a communication module.

Generally, transformers are widely used in a wide range of applications such as large power plants, households, and electric trains. Among them, they are located at the last stage of power distribution as a part of power transmission system and power distribution system. A distribution transformer is used to supply the required voltage in industrial facilities, factories or homes.

In the case of power distribution transformers, an overload frequently occurs due to an increase in power demand and expansion of urban areas. Such an overload may cause anomalous phenomena in the transformer due to external environmental factors and internal factors. For example, the pressure inside the transformer rises above the reference value and may cause explosion, fire due to the explosion, and the like.

Accordingly, a safety device for preventing a problem that a pressure inside the transformer exceeds a reference value is generally installed in the distribution transformer. The safety device may be, for example, a pressure-proof valve. The pressure-proof valve opens momentarily when the pressure inside the transformer exceeds a certain pressure, and releases the pressure to the outside, thereby preventing deformation, breakage and explosion of the transformer enclosure.

The pressure relief valve applied to the transformer is basically the same as the mechanical reducing valve commonly used to maintain the internal pressure of the enclosed structure at a constant pressure. That is, when the pressure rises, the valve is automatically opened and the pressure is discharged to the outside, so there is no problem in discharging the pressure for maintaining the internal pressure at a constant pressure.

However, it is not possible to determine the frequency of how often the valve opening occurs frequently only with a mechanical type pressure control valve. The number of openings of the pressure relief valve provides important information for determining the condition and life of the components inside the transformer, and whether or not the repair time has arrived. Nevertheless, in the past, there was no way to know the opening frequency, so we had to check the condition of the transformer through actual field inspection.

Korea Registered Utility Model No. 20-0443694 (Registered on Feb. 27, 2009) _ Emission safety device for pillar transformer

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pressure-proof valve module for a transformer having a valve opening / closing detection function so as to grasp a number of times the valve is opened as well as a basic pressure-proof function for maintaining the internal pressure at a constant pressure.

Another object of the present invention is to provide a transformer capable of remotely managing the state of a transformer, such as predicting the life of the internal parts of a transformer and whether a repair time is available, by wirelessly transmitting the valve opening detection information to an external control room through a communication module And to provide a pressure-proof valve module.

Another object of the present invention is to provide a power supply control apparatus and a control method thereof, in which a non-power source detecting switch of an electromagnetic induction type is operated in conjunction with a valve opening and a predetermined current is outputted and transmitted to an external control room through a communication module. And to provide a pressure-proof valve module for a transformer having a non-powered valve opening / closing detection function that can be excluded.

According to an embodiment of the present invention,

A pressure-proof valve which is coupled to an arbitrary position of the transformer enclosure and is opened when the pressure inside the transformer rises above a set pressure, thereby lowering the internal pressure;

A valve opening detecting portion disposed adjacent to a side portion of the pressure control valve and detecting the opening of the pressure control valve and wirelessly transmitting the detected opening information to the outside via the communication module; And

And an interlocking member interlockingly connecting the valve-opening detecting portion and the valve shaft of the pressure-proof valve,

Wherein the valve opening detection unit detects the opening of the pressure-proof valve by a non-power source through an electromagnetic induction type detecting switch that is operated by the armature by the interlocking member to generate a predetermined electric signal when the pressure- And the module is transferred to the outside through the module. The pressure-proof valve module for a transformer having a non-powered valve opening / closing detection function is provided.

In one embodiment of the present invention, the pressure-proof valve includes a small-diameter portion and a large-diameter portion, and a thread for screwing the side wall of the transformer housing or the fastening hole of the top plate is formed on the outer surface of the small- And a valve head which is movably coupled to the valve body and is brought into close contact with the valve seat, wherein the valve body has a hollow hollow structure in which a valve seat is formed at an inner edge of a boundary between the large diameter portion and the large diameter portion, An elastic member provided between the valve body and the valve shaft so as to be urged in a direction in which the valve head is in close contact with the valve seat and closes the internal passage of the valve body, .

Wherein the valve shaft includes: an outer shaft having a hollow structure, the valve shaft having an outer surface and an inner shaft hole formed along the longitudinal direction at a center thereof; and an inner shaft having a hollow portion, And an inner shaft which is inserted into the hole and to which the interlocking member is connected to the tip of another portion protruding outside the outer shaft, and a piston may be formed on the inner shaft located in the inner shaft hole.

Preferably, the inner shaft is first moved in the axial direction by the pressure acting on the piston when the pressure inside the transformer rises, and then, when the internal pressure reaches the set pressure, the outer shaft is moved in the axial direction to open the valve have.

The valve opening detection unit may include an electromagnetic induction type detection unit including an amateur and a coil surrounding the magnet on the armature so as to generate a predetermined electric signal interlocking with opening and closing of the pressure- A communication module for converting a predetermined electric signal generated by the detection switch into a signal capable of wireless communication and outputting the converted signal to the outside in a wireless manner; a circuit which is mounted so that the detection switch and the communication module are electrically connected Substrate. ≪ / RTI >

According to another embodiment of the present invention as a solution to the problem,

A pressure-proof valve which is coupled to an arbitrary position of the transformer enclosure and is opened when the pressure inside the transformer rises above a set pressure, thereby lowering the internal pressure;

And a valve opening detector disposed adjacent to a front side of the pressure control valve and detecting the opening of the pressure control valve and wirelessly transmitting the detected opening information to the outside via the communication module,

Wherein the valve opening detection unit detects the opening of the pressure-proof valve by a non-power source through an electromagnetic induction type detecting switch which is operated by an armature when the pressure-proof valve is opened and generates a predetermined electric signal, The pressure-proof valve module for a transformer having a non-powered valve opening / closing detection function is provided.

In another embodiment of the present invention, the pressure-proof valve includes a small-diameter portion and a large-diameter portion, wherein a thread for screwing the side wall of the transformer housing or the fastening hole of the top plate is formed on the outer surface of the small- And a valve head which is movably coupled to the valve body and is brought into close contact with the valve seat, and a part of the valve body, And a resilient member provided between the valve body and the valve shaft so as to be urged in a direction to close the valve body so that the valve head is in close contact with the valve seat. .

Wherein the valve shaft includes: an outer shaft having a hollow structure, the valve shaft having an outer surface and an inner shaft hole formed along the longitudinal direction at a center thereof; and an inner shaft having a hollow portion, And an inner shaft which is inserted into the hole and is provided so that another portion protruding outside the outer shaft faces the armature of the detection switch in a straight line. At this time, a piston may be formed on the inner shaft located in the inner shaft hole have.

Preferably, the inner shaft is first moved in the axial direction by the pressure acting on the piston when the pressure inside the transformer rises, and then, when the internal pressure reaches the set pressure, the outer shaft is moved in the axial direction to open the valve have.

The valve opening detection unit may include an electromagnetic induction type detection unit including an amateur and a coil surrounding the magnet on the armature so as to generate a predetermined electric signal interlocking with opening and closing of the pressure- A communication module for converting a predetermined electric signal generated by the detection switch into a signal capable of wireless communication and outputting the converted signal to the outside in a wireless manner; a circuit which is mounted so that the detection switch and the communication module are electrically connected Substrate. ≪ / RTI >

The pressure-proof valve module for a transformer according to an embodiment of the present invention outputs a detection signal at the time of valve opening as well as a basic pressure-proof function for maintaining the internal pressure at a constant pressure and transmits the detection signal to the outside through the communication module. Therefore, it is possible to remotely check the life expectancy of the parts inside the transformer from the number of times the detection signal is generated, and whether the repair time has arrived or not. As a result, the number of field inspections for transformer management can be greatly reduced.

Further, an electromagnetic induction type non-power source detecting switch for outputting a predetermined electric signal interlocked with the valve opening is applied without a separate power supply. Therefore, it is possible to eliminate or minimize the use of the power source separate from the battery in the implementation of the detector, which is advantageous from the viewpoint of maintenance cost and management, and is advantageous in terms of ease of mass production and ease of installation.

1 is an exploded perspective view of a pressure-proof valve module for a transformer according to an embodiment of the present invention;
2 is an exploded perspective view of the pressure-proof valve module for a transformer shown in FIG. 1;
3 is a sectional view of the pressure-proof valve shown in Figs. 1 and 2. Fig.
4 is a schematic view of the valve opening detecting portion shown in Figs. 1 and 2. Fig.
5 is a view showing a modified example of a pressure-proof valve applied to an embodiment of the present invention.
6 is a side view of a pressure-proof valve module for a transformer according to another embodiment of the present invention;
7 is an operational state diagram of the pressure-proof valve module for a transformer shown in Fig.

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

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

It is to be understood that the terms "comprises", "having", and the like in the specification are intended to specify the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof.

Also, the terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

In addition, the terms " part, "" unit," " module, "and the like, which are described in the specification, refer to a unit for processing at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software .

In the following description with reference to the accompanying drawings, the same reference numerals are given to the same constituent elements, and a duplicate description thereof will be omitted. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

FIG. 1 is an exploded perspective view of a pressure-proof valve module for a transformer according to an embodiment of the present invention, FIG. 2 is an assembled perspective view of a pressure-proof valve module for a transformer shown in FIG. 1, . FIG. 3 is a cross-sectional view of the pressure-proof valve shown in FIGS. 1 and 2, and FIG. 4 is a schematic view of the valve-opening detecting portion shown in FIGS.

1 to 4, a pressure-proof valve module 1 for a transformer according to an embodiment includes a pressure-proof valve 10, a valve-opening detecting portion 30, and an interlocking member 20. The pressure-proof valve 10 functions to maintain the pressure inside the transformer at a set pressure. The valve-opening detecting unit 30 is switched when the pressure-proof valve 10 is opened to output a predetermined detection signal. The interlocking member 20 interlockingly connects the pressure-proof valve 10 and the valve-opening detection unit 30. [

The pressure-proof valve (10) is fastened at an arbitrary position in the transformer enclosure, and functions to lower the internal pressure when the internal pressure of the transformer rises above the set pressure. The pressure-proof valve 10 in one embodiment includes a hollow valve body 12, a valve shaft 14 that performs linear motion along the valve body 12, and a valve body 12 And an elastic member 16 disposed between the elastic member 16 and the elastic member 16.

The valve body 12 may preferably be composed of a metal material including a small diameter portion 120 having a hollow hollow structure and a large diameter portion 124 integrally provided on one side of the small diameter portion 120. The outer surface of the small diameter portion 120 may be threaded to be screwed with the side wall of the transformer enclosure or the fastening hole of the upper plate and a valve may be formed at the inner edge of the boundary between the small diameter portion 120 and the large diameter portion 124, The sheet 13 can be formed.

A valve shaft 14 may be axially movably coupled to the valve body 12. The valve shaft 14 is provided with a valve head 15. The valve head 15 is integrally formed at one end of the valve shaft 14 located in the valve body 12 and is spaced from the valve seat 13 or brought into close contact with the valve seat 13 depending on the pressure of the transformer, Thereby opening or closing the internal passageway forming the discharge path.

A portion of the valve shaft 14 extends to protrude out of the valve body 12 through an outlet E of the large diameter portion 124 opposite to the small diameter portion 120 and is provided at an extended end portion protruding outside the valve body 12 The interlocking member 20 is connected. The resilient member 16 urges the valve body 12 and the valve shaft 14 so that the valve head 15 is urged against the valve seat 13 to close the internal passage of the valve body 12, Respectively.

The resilient member 16 is preferably a compression coil spring and includes a stopper 18 mounted at the outlet for blocking the valve head 15 and the valve shaft 14 from separating from the valve body 12, So that one end and the other end thereof are respectively supported. The stopper (Stopper, 18) may be formed of a wheel (Wheel) structure consisting of a boss (Boss) and the rim (Rim), and spokes (Spoke) connecting them.

The interlocking member 20 is a member that interlockingly connects the valve opening detection portion 30 and the valve shaft 14 of the pressure-proof valve 10. When the valve shaft 14 receives pressure and is pushed to the open position, The detection switch 32 of the detection unit 30, specifically, the armature 320 described later, is operated to output a predetermined electric signal. The interlocking member 20 may be a structure capable of interlocking two interlocking objects.

The valve opening detection portion 30 may be disposed adjacent to the side of the pressure-proof valve 10 at a distance such that the operating force of the valve shaft 14 can be smoothly transmitted through the interlocking member 20. [ The valve opening detection unit 30 detects the opening degree of the pressure control valve 10 through the electromagnetic induction detection switch 32 that operates the armature 320 by the interlocking member 20 to generate a predetermined electric signal when the pressure control valve 10 is opened, (10) as a non-power source, and transmits the open information to the outside, for example, the control room via the communication module (34) wirelessly.

The valve opening detection unit 30 includes a detection switch 32 composed of an amateur 320 having a magnet 322 and a coil 324 surrounding the amateur 320, And a communication module 34 for converting the electric signal of the wireless communication device into a signal capable of wireless communication and outputting the converted signal to the outside in a wireless manner. And a circuit board 36 mounted so that the detection switch 32 and the communication module 34 are electrically connected to each other.

When the valve shaft 14 of the pressure-proof valve 10 is moved in the direction of opening the internal passage due to the increase of the internal pressure of the transformer, the armature member 20 moves the armature 320 in the axial direction, And the electromagnetic induction principle of the coil 324, a predetermined electricity is generated. The generated electric signal is transmitted to the communication module 34, and is wirelessly transmitted to the outside through a predetermined conversion process.

Preferably, the circuit for converting the detection signal generated by the detection switch 32 into a signal capable of wireless transmission and wirelessly transmitting the signal to the outside, that is, the communication module 34 may be a separate small power source.

In the drawings, reference numeral 40 denotes a grip ring provided at the end of the valve shaft 14 so that an operator can manually open the valve manually. In some cases, the grip ring 40 is held by the gripping ring 40, Reference numeral 50 and 52 denote a case and a cover which accommodate the pressure-proof valve 10 and the valve-opening detecting portion 30 so as to form one module .

According to the embodiment of the present invention described above, a basic pressure-proof function for maintaining the internal pressure at a constant pressure, as well as a detection signal at the valve-opening time, is transmitted to the outside through the communication module 34. Therefore, it is possible to remotely check the life expectancy of the parts inside the transformer from the number of times the detection signal is generated, and whether the repair time has arrived or not. As a result, the number of field inspections for transformer management can be greatly reduced.

Further, an electromagnetic induction type non-power source detecting switch for outputting a predetermined electric signal interlocked with the valve opening is applied without a separate power supply. Therefore, it is possible to exclude or minimize the use of the power source separate from the battery in the implementation of the detector, which is advantageous in terms of maintenance cost and management, and is advantageous in terms of ease of mass production and ease of installation.

5 is a modification of the embodiment of the present invention, except that the configuration of the valve shaft 14 is the same as that of the above-described embodiment. Therefore, redundant description of the same configuration will be omitted, and only the configuration of the valve shaft 14 corresponding to the difference will be briefly described.

5 may be constituted by an outer shaft 140 formed with a valve head 15 and an inner shaft 142 surrounded by an outer shaft 140. [ At this time, the shaft 142 located inwardly can be coupled to the outer shaft 140 so as to be relatively movable in the axial direction. The outer shaft 140 and the inner shaft 142 will be used for convenience of explanation.

The outer shaft 140 preferably has a hollow structure in which the valve head 15 is provided on the outer surface portion and the inner shaft hole 141 is formed along the longitudinal direction at the center. The inner shaft 142 is partially inserted into the inner shaft hole 141 so as to be axially movable with respect to the outer shaft 140 and is inserted into the distal end of another portion protruding outside the outer shaft 140, 20 can be connected.

 A piston 144 may be formed on the inner shaft 142 located in the inner shaft hole 141. At this time, the outer circumferential surface of the piston 144 may be configured to be in intimate contact with the inner circumferential surface of the inner shaft hole 141. Preferably, the frictional force between the inner circumferential surface of the inner shaft hole 141 and the outer circumferential surface of the piston 144 is smaller than the elastic force of the resilient member 16 that elastically supports the outer shaft 140, Can be configured to move.

The frictional force between the inner circumferential surface of the inner shaft hole 141 and the outer circumferential surface of the piston 144 is made smaller than the elastic force of the elastic member 16 elastically supporting the outer shaft 140, The inner shaft 142 first moves in the axial direction to actuate the detection switch 32 as described above. When the inner pressure reaches the set pressure, the outer shaft 140 moves in the axial direction to open the valve can do.

According to this configuration, the detection switch 32 is operated by the inner shaft 142 before reaching the internal pressure setting pressure of the transformer, that is, the dangerous pressure, and outputs a predetermined signal to the outside. Thereby, it is possible to recognize in advance the abnormal state of the transformer before the internal pressure of the transformer reaches the dangerous pressure, so that an appropriate response such as inspection and repair can be performed quickly at an early stage.

6 is a side view of a pressure-proof valve module for a transformer according to another embodiment of the present invention.

6 shows a state in which the valve opening detection portion 30 (see FIG. 6) is disposed in the direction in which the valve shaft 14 is moved when the pressure-proof valve 10 is opened in front of the pressure-proof valve 10, ) Are positioned on a straight line with a predetermined distance therebetween. That is, the use of a separate interlocking means such as the interlocking member 20 in the embodiment is eliminated, thereby simplifying the construction.

Hereinafter, only a portion corresponding to a difference in configuration will be briefly described as compared with the above-described embodiment, and the same reference numerals are given to the same components as those of the above-described embodiment, and a duplicated description thereof will be omitted do.

Referring to FIG. 6, a valve opening detecting portion 30 is disposed at a predetermined distance in front of the pressure-proof valve 10. It is preferable that the front end of the armature 320 of the valve opening detecting portion 30 (the portion into which the switching operating force is input) is pushed to the valve shaft 14 of the pressure-proof valve 10 by a predetermined distance, The valve opening detecting portion 30 is disposed in front of the valve 10 so as to be spaced apart therefrom.

According to such a configuration, when the pressure-proof valve 10 is operated to the open position due to the pressure rise in the transformer, the valve-opening detection portion 30, specifically, the armature 320 constituting the detection switch 32 is pushed backward In this process, a predetermined electric signal is generated due to the interaction of the magnet and the coil of the armature 320. The generated electric signal is transmitted to the communication module 34, and is wirelessly transmitted to the outside through a predetermined conversion process.

The valve shaft 14 applied to the present embodiment may also have the same configuration as the modification of the above-described embodiment (Fig. 5). A hollow outer shaft 140 having an inner shaft hole 141 formed therein and a pair of inner shaft holes 141 and 142 which are inserted into the inner shaft hole 141 so as to be axially movable with respect to the outer shaft 140, And the piston 144 may be integrally formed with the inner shaft 142 positioned.

In this case, the outer circumferential surface of the piston 144 may be configured to be in intimate contact with the inner circumferential surface of the inner shaft hole 141, as in the modification. Preferably, the frictional force between the inner circumferential surface of the inner shaft hole 141 and the outer circumferential surface of the piston 144 is smaller than the elastic force of the resilient member 16 that elastically supports the outer shaft 140, Can be configured to move.

The frictional force between the inner circumferential surface of the inner shaft hole 141 and the outer circumferential surface of the piston 144 is made smaller than the elastic force of the resilient member 16 elastically supporting the outer shaft 140, The inner shaft 142 first moves in the axial direction to actuate the detection switch 32 (Fig. 7 (a)). Then, when the inner pressure reaches the set pressure, the outer shaft 140 moves in the axial direction The valve can be opened (Fig. 7 (b)).

According to another embodiment of the present invention, when the pressure-proof valve is opened, the valve-opening detecting portion is positioned on a straight line with a predetermined distance in the direction in which the valve shaft is moved, The use of the interlocking means can be excluded.

In the foregoing detailed description of the present invention, only specific embodiments thereof have been described. It is to be understood, however, that the invention is not to be limited to the specific forms thereof, which are to be considered as being limited to the specific embodiments, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims. .

1: Pressure-proof valve module 10: Pressure-proof valve
12: valve body 13: valve seat
14: valve shaft 15: valve head
16: elastic member 18: stopper
20: interlocking member 30: valve opening detecting portion
32: detection switch 34: communication module
40: Grip ring 50: Case
120: small diameter portion 124: large diameter portion
140: outer shaft 141: inner shaft hole
142: Inner shaft 144: Piston
320: Amateur 322: Magnet
324: Coil

Claims (10)

A pressure-proof valve which is coupled to an arbitrary position of the transformer enclosure and is opened when the pressure inside the transformer rises above a set pressure, thereby lowering the internal pressure;
A valve opening detecting portion disposed adjacent to a side portion of the pressure control valve and detecting the opening of the pressure control valve and wirelessly transmitting the detected opening information to the outside via the communication module; And
And an interlocking member interlockingly connecting the valve-opening detecting portion and the valve shaft of the pressure-proof valve,
Wherein the valve opening detection unit detects the opening of the pressure-proof valve by a non-power source through an electromagnetic induction type detecting switch that is operated by the armature by the interlocking member to generate a predetermined electric signal when the pressure- And the module is transmitted to the outside through a module. The pressure-proof valve module for a transformer has a non-powered valve opening / closing detection function.
The method according to claim 1,
The pressure-
Wherein a screw thread for screw connection with the side wall of the transformer housing or the fastening hole of the upper plate is formed on the outer surface of the small diameter portion and the valve seat is formed at the inner edge of the boundary between the small diameter portion and the large diameter portion A hollow hollow valve body;
A valve shaft movably coupled to the valve body and having a valve head that is in close contact with the valve seat, the valve shaft having an extended end protruding outwardly of the large diameter portion;
And an elastic member installed between the valve body and the valve shaft so as to be urged in a direction in which the valve head is in close contact with the valve seat to close the internal passage of the valve body. Pressure relief valve module.
3. The method of claim 2,
Wherein the valve shaft includes:
An outer shaft having a hollow structure in which the valve head is provided on an outer surface portion and an inner shaft hole is formed along a longitudinal direction at the center;
And an inner shaft which is inserted into the inner shaft hole so as to be axially movable with respect to the outer shaft and to which the interlocking member is connected to a distal end of another portion protruding outside the outer shaft,
And a piston is formed on the inner shaft located in the inner shaft hole.
The method of claim 3,
The inner shaft is first moved in the axial direction by the pressure acting on the piston when the internal pressure of the transformer rises, and when the internal pressure reaches the set pressure, the outer shaft is moved in the axial direction to open the valve. Pressure-proof valve module for transformer with detection function.
The method according to claim 1,
Wherein the valve-
An electromagnetic induction detection switch composed of an amateur and a coil surrounding an amateur magnet so as to generate a predetermined electric signal interlocked with opening and closing of the pressure-proof valve;
A communication module for converting a predetermined electric signal generated by the detection switch into a signal capable of wireless communication and outputting the converted signal to the outside via radio;
And a circuit board on which the detection switch and the communication module are mounted to be electrically connected to each other.
A pressure-proof valve which is coupled to an arbitrary position of the transformer enclosure and is opened when the pressure inside the transformer rises above a set pressure, thereby lowering the internal pressure;
And a valve opening detector disposed adjacent to a front side of the pressure control valve and detecting the opening of the pressure control valve and wirelessly transmitting the detected opening information to the outside via the communication module,
Wherein the valve opening detection unit detects the opening of the pressure-proof valve by a non-power source through an electromagnetic induction type detecting switch which is operated by an armature when the pressure-proof valve is opened and generates a predetermined electric signal, Wherein the pressure control valve module has a non-powered valve opening / closing detection function.
The method according to claim 6,
The pressure-
Wherein a screw thread for screw connection with the side wall of the transformer housing or the fastening hole of the upper plate is formed on the outer surface of the small diameter portion and the valve seat is formed at the inner edge of the boundary between the small diameter portion and the large diameter portion A hollow hollow valve body;
A valve shaft axially movably coupled to the valve body and having a valve head which is in close contact with the valve seat, and a part of which is protruded outwardly from the large diameter portion;
And an elastic member installed between the valve body and the valve shaft so as to be urged in a direction in which the valve head is in close contact with the valve seat to close the internal passage of the valve body. Pressure relief valve module.
8. The method of claim 7,
Wherein the valve shaft includes:
An outer shaft having a hollow structure in which the valve head is provided on an outer surface portion and an inner shaft hole is formed along a longitudinal direction at the center;
And an inner shaft having a part thereof inserted into the inner shaft hole so as to be axially movable with respect to the outer shaft and another part protruding outside the outer shaft so as to face the armature of the detection switch in a straight line,
And a piston is formed on the inner shaft located in the inner shaft hole.
9. The method of claim 8,
The inner shaft is first moved in the axial direction by the pressure acting on the piston when the internal pressure of the transformer rises, and when the internal pressure reaches the set pressure, the outer shaft is moved in the axial direction to open the valve. Pressure-proof valve module for transformer with detection function.
The method according to claim 6,
Wherein the valve-
An electromagnetic induction detection switch composed of an amateur and a coil surrounding an amateur magnet so as to generate a predetermined electric signal interlocked with opening and closing of the pressure-proof valve;
A communication module for converting a predetermined electric signal generated by the detection switch into a signal capable of wireless communication and outputting the converted signal to the outside via radio;
And a circuit board on which the detection switch and the communication module are mounted to be electrically connected to each other.
KR1020170010597A 2017-01-23 2017-01-23 Pressure reducing valve for electric transformer with non-power valve open and close sensing function KR101854758B1 (en)

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KR20190103049A (en) * 2018-02-26 2019-09-04 (주)오너스 Sensor for solenoid valve monitoring
KR102060612B1 (en) 2019-07-11 2019-12-30 주식회사 미진 A pressure relief device
KR102060610B1 (en) 2019-07-11 2019-12-30 주식회사 미진 A pressure relief device
KR102264003B1 (en) * 2020-02-03 2021-06-10 엘에스일렉트릭(주) Pressure gauge coupler for gas insulated ring main unit

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190103049A (en) * 2018-02-26 2019-09-04 (주)오너스 Sensor for solenoid valve monitoring
KR102143478B1 (en) 2018-02-26 2020-08-11 (주)오너스 Sensor for solenoid valve monitoring
KR102060612B1 (en) 2019-07-11 2019-12-30 주식회사 미진 A pressure relief device
KR102060610B1 (en) 2019-07-11 2019-12-30 주식회사 미진 A pressure relief device
KR102264003B1 (en) * 2020-02-03 2021-06-10 엘에스일렉트릭(주) Pressure gauge coupler for gas insulated ring main unit

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