KR101456010B1 - A butterfly valve for transformer - Google Patents

A butterfly valve for transformer Download PDF

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Publication number
KR101456010B1
KR101456010B1 KR20140037987A KR20140037987A KR101456010B1 KR 101456010 B1 KR101456010 B1 KR 101456010B1 KR 20140037987 A KR20140037987 A KR 20140037987A KR 20140037987 A KR20140037987 A KR 20140037987A KR 101456010 B1 KR101456010 B1 KR 101456010B1
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KR
South Korea
Prior art keywords
stopper
valve
valve disc
transformer
flow path
Prior art date
Application number
KR20140037987A
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Korean (ko)
Inventor
박정준
Original Assignee
박정준
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Priority to KR20140037987A priority Critical patent/KR101456010B1/en
Application granted granted Critical
Publication of KR101456010B1 publication Critical patent/KR101456010B1/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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/221—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves specially adapted operating means therefor
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/52—Means for additional adjustment of the rate of flow
    • 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
    • F16K27/0209—Check valves or pivoted valves
    • F16K27/0218—Butterfly 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/60—Handles

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)

Abstract

The present invention relates to a butterfly valve for a transformer, and more particularly, to a butterfly valve for a transformer, which is applied to a transformer in general electric equipment to control the flow of insulating oil, And more particularly to a butterfly valve for a transformer for ensuring convenience and workability of a fastening structure in accordance with an installation position of a stopper while allowing a closed rotation angle of a disk provided in a flow path of a valve to be precisely controlled using a stopper .
According to an aspect of the present invention, It is a butterfly valve that is applied to a transformer among general electric equipments to control the flow of insulating oil and enables the maintenance of the transformer without discharging the insulating oil stored in the inside of the transformer. A valve body 110 having an oil passage 111 as a space through which the oil of the transformer flows; The shaft 121 is coupled to an upper portion of the valve body 110 by a shaft 121 so that the shaft 121 is penetrated to expose a part of the lower part from the inside of the flow path 111, A handle bundle 120 that rotates to operate the valve disc 130; A valve disc 130 which is fixedly coupled to the shaft 121 of the handle bundle 120 and which is exposed to the inside of the oil passage 111 and opens and closes the oil passage 111 by rotating the shaft 121 in place, Wow; A portion protruding from the inside of the flow path 111 protrudes from the valve disc 110 at a position adjacent to the flow path 111 at a side surface of the valve body 110, And a stopper 200 for precisely controlling the rotation angle at which the valve disc 130 is closed by using a structure in which the valve disc 130 is fixed in contact with the side surface of the valve disc 130,
The valve disc 130 is inserted into the valve disc 130 and is tightly attached to the side wall of the flow path 111 to thereby seal the valve disc 130. [ And the stopper 200 is made of a neodymium (Nd) magnet or a samarium-cobalt (Sm-Co) magnet made of a magnetic metal material, The stopper 200 is made of a metal having magnetism, and the surface of the stopper 200 is plated with nickel or copper-nickel. The stopper 200 is inserted into the stopper groove 210 formed at a position adjacent to the flow passage 111 and has a clearance space capable of moving before and after the flow passage 111 in the through direction, (Not shown) And the fixing bolt 220 is inserted into the end plate 230 coupled to the stopper groove 210 from the side surface of the valve body 110 so that the head portion of the fixing bolt 220 passes through the fixing bolt 220, And the stopper 200 is moved forward and backward in the stopper groove 210 in response to the spiral rotation of the fixing bolt 220. [

Description

A BUTTERFLY VALVE FOR TRANSFORMER FOR TRANSFORMER

The present invention relates to a butterfly valve for a transformer, and more particularly, to a butterfly valve for a transformer, which is applied to a transformer in general electric equipment to control the flow of insulating oil, And more particularly to a butterfly valve for a transformer for ensuring convenience and workability of a fastening structure in accordance with an installation position of a stopper while allowing a closed rotation angle of a disk provided in a flow path of a valve to be precisely controlled using a stopper .

Discloses a valve for controlling the flow rate of various kinds of fluids. The valve disclosed in Korean Patent Publication No. 1980-0000236 (Publication Date: 1980.03.22) A wet tubular body engaged with the tubular body so as to be movable only in the axial direction of the rotary shaft of the valve body and a rotary tubular body on the user capable of only rotating around the axial center are coaxially arranged in the axial bearing portion, A butterfly valve having a structure in which a sieve is engaged with a tight pitch and is located in a closed space formed by a rotating operation of the rotary cylinder to refine the trast rotation axis number between the bearing water portion and the rotary cylinder.

In addition, as a background of the present invention, a "Korean Registered Utility Model No. 20-0220495 (Registered Date: 2001.02.02)" was disclosed as a prior art, which is characterized in that the outer end of the valve disk of the butterfly valve is contacted or separated, A reinforcing ring made of phenolic resin is installed inside the valve seat to prevent the deformation and damage of the valve seat to increase the sealing effect of the valve and to extend the service life of the valve. A butterfly valve comprising a ring-shaped valve seat disposed on an inner circumferential surface thereof, a disc connected to the stem rotating, and an outer end of the disc being selectively in close contact with an inner surface of the valve seat, wherein a reinforcing ring made of phenol resin material A butterfly valve having a built-in structure is proposed.

In this way, conventionally, a disc-shaped valve disc is inserted into a flow path formed inside the butterfly valve, and the valve disc is axially coupled with the valve disc being rotated around the axis to open and close the flow path, And has a structure corresponding to the rotation direction of the shaft.

Further, in order to fix the rotation angle of the valve disk for opening and closing the flow path of the butterfly valve so as to be accurately closed separately from the rotation of the shaft, a fixing part such as a stopper must be directly installed on the side wall inside the flow path Structure.

Therefore, when the butterfly valve is installed in a device in which a fluid flows at a high pressure, the valve disc closes the flow path depending on only that the valve disc is opened and closed on the shaft. Therefore, If an error occurs with respect to the rotation angle at which the valve disc closes, such as when the disc rotates finely about the shaft, and the rotation angle of the shaft is not constant in structure, leakage of the fluid occurs when the flow path of the butterfly valve is completely closed, It is not easy to accurately control the flow rate during the unit time.

Further, in order to fix the valve disc so that the valve disc is correctly closed separately from the rotation of the shaft, a fixing part such as a stopper may be separately used. Accordingly, when the butterfly valve is manufactured, It is difficult to use a tool such as a drill or a screwdriver because of the shape of the flow path, so that the workability and assemblability for fastening the fixed part are remarkably deteriorated. Also, since the mounting position of the fixed part after machining also has a tolerance, There is another problem that an error is caused to the closed rotation angle.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a butterfly valve in which a stopper is inserted and closed at a position where a valve disc closes a flow path, This makes it possible to precisely control the rotation angle at which the valve disc closes the flow path by means of which the error of the rotation angle at which the valve disc is closed can be reduced to prevent leakage of the fluid in the state where the flow path of the butterfly valve is completely closed, Which is capable of accurately controlling the flow rate during a unit time.

Further, in the present invention, the fixing bolt for mounting the stopper on the butterfly valve is inserted into the stopper groove formed adjacent to the flow path and screwed into the stopper groove through the valve body from the side of the valve body to the inside of the stopper, Since the use of a tool such as a drill or a screwdriver can be easily performed outside the flow path having a narrow space, workability and assembling performance for fastening the stopper can be improved and the tolerance on the mounting position of the stopper after machining can be reduced Another object is to minimize the error in the rotational angle at which the valve disc closes.

According to an aspect of the present invention, It is a butterfly valve that is applied to a transformer among general electric equipments to control the flow of insulating oil and enables the maintenance of the transformer without discharging the insulating oil stored in the inside of the transformer. A valve body having a flow path which is a space through which the insulating oil of the transformer flows; A handle assembly coupled to an upper portion of the valve body through a shaft so as to penetrate the lower portion of the shaft from the inside of the flow passage to expose a lower portion thereof and to operate the valve disk by rotating the shaft by an external force; A valve disc fixedly coupled to a portion of the handle bundle exposed on an inner side of the flow passage and opening / closing the flow passage by using a rotating operation of the shaft; Wherein a portion of the valve body protruding from the side surface of the valve body is provided in a position adjacent to the valve body and protruding from the valve body, And a stopper for precisely controlling the rotation angle at which the rotation shaft is closed,
Wherein the valve disc further comprises a sealing member which is inserted into the outer periphery of the valve disc to closely contact the side wall of the flow path to increase the efficiency of sealing the flow path of the valve disc, (Nd) magnet or a samarium-cobalt (Sm-Co) magnet made of a material, and the valve disc is fixed while being in contact with the end of the stopper through magnetic force, and the stopper is made of magnet And the stopper is inserted into a stopper groove formed at a position adjacent to the flow path, and the stopper is provided with a clearance space that can be moved before and after the flow path in the through direction Is inserted into the stopper groove and is threadedly engaged with a fixing bolt which rotates in place, Wherein the bolt is configured to rotate in a fixed manner so as not to be detached in a state in which the head portion passes through the finish plate coupled to the stopper groove side from the side surface of the valve body, Wherein the forward and backward movement is effected within a predetermined range.

According to the present invention, it is possible to precisely control the rotation angle at which the valve disc closes the flow path, thereby reducing errors in the rotation angle at which the valve disc closes, thereby preventing leakage of the fluid in a state in which the flow path of the butterfly valve is completely closed In addition, there is an effect that the flow rate of the fluid flowing during the unit time can be accurately controlled.

In addition, since the use of a tool such as a drill or a screwdriver can be easily performed outside the flow path having a narrow space to allow the stopper to be installed on the butterfly valve, workability and assembling performance for fastening the stopper can be improved, It is possible to reduce the tolerance to the mounting position of the stopper, thereby minimizing the error in the angle of rotation of the valve disk.

1 is a front view and a partial enlarged view of a butterfly valve for a transformer according to an embodiment of the present invention.
2 is a side view of a butterfly valve for a transformer according to an embodiment of the present invention.
3 is a plan view and a partial enlarged view of a butterfly valve for a transformer according to an embodiment of the present invention.
4 is a view showing a butterfly valve for a transformer according to another embodiment;

The butterfly valve for a transformer according to the present invention will be understood by those skilled in the art with reference to the accompanying drawings.

In the following description of the exemplary embodiments of the present invention, a detailed description of components that are widely known and used in the art to which the present invention belongs is omitted, and unnecessary explanations thereof are omitted. It is to communicate the point more clearly.

1 to 3 are views illustrating a butterfly valve for a transformer according to an embodiment of the present invention.

Accordingly, the butterfly valve 100 for a transformer is roughly described. The butterfly valve 100 for a transformer is generally applied to a transformer to control the flow of the insulating oil. In addition, the maintenance of the transformer is performed without discharging the insulating oil stored in the transformer. A valve body 110 having a passage 111 that is a portion directly coupled to the transformer and connected to the inside of the transformer and through which the insulating oil of the transformer flows; The shaft 121 is coupled to an upper portion of the valve body 110 by a shaft 121 so that the shaft 121 is penetrated to expose a part of the lower part from the inside of the flow path 111, A handle bundle 120 that rotates to operate the valve disc 130; A valve disc 130 which is fixedly coupled to the shaft 121 of the handle bundle 120 and which is exposed to the inside of the oil passage 111 and opens and closes the oil passage 111 by rotating the shaft 121 in place, Wow; A portion protruding from the inside of the flow path 111 protrudes from the valve disc 110 at a position adjacent to the flow path 111 at a side surface of the valve body 110, And a stopper 200 for precisely controlling a rotation angle at which the valve disc 130 is closed using a structure in which the valve disc 130 is held in contact with and fixed to a side surface of the valve disc 130.

Hereinafter, the constitution of each part of the present invention will be described in detail.

First, the valve body 110 is directly coupled to the transformer and has a flow path 111, which is a space through which the insulating fluid of the transformer flows.

The valve body 110 is made of a metal material and has a size corresponding to the size of the transformer to which the butterfly valve 100 is applied and a flow path 111 ) Are formed in a circular shape.

The upper portion of the valve body 110 preferably has a horizontal upper surface for engaging with the handle bundle 120 to be described later. And a shaft hole 112 to be connected therethrough.

Further, as the pipe is bolted to the through hole 113 in a state in which a plurality of through holes 113 to be connected to the transformer by a pipe fastening structure are formed at an equal interval in the inner circumference of the valve body 110, The body 110 can be directly fastened to the transformer.

The valve body 110 has a stopper groove 210 for engaging the stopper 200 to be described later formed at a position adjacent to the flow passage 111 on one side of the valve body 110, Type structure.

The handle bundle 120 is coupled to an upper portion of the valve body 110 using a shaft 121 so that the shaft 121 is penetrated to expose a part of the lower portion from the inside of the flow passage 111, The shaft 121 rotates in place to operate the valve disc 130 to open and close the oil passage 111 as will be described later.

The lower end of the handle bundle 120 is exposed to the inside of the flow passage 111 while being inserted into the shaft hole 112 passing through the upper portion of the valve body 110, 111).

At this time, the shaft 121 is manufactured corresponding to the diameter and the penetration length of the shaft hole 112, and the part of the shaft 121 exposed to the inside of the flow path 111 is connected to the valve disc 130 It is preferable that a vertical plane is formed.

The handle bundle 120 is fixed to the upper horizontal surface of the valve body 110 so that the upper side of the shaft 121 is inserted into the valve body 110. When the shaft 121 is fastened to the valve body 110, And a handle cap 122 for rotating operation.

The handle cap 122 is formed in a plate shape and is bolted and fixed in a state of being in surface contact with the upper horizontal surface of the valve body 110. The valve body 110 and the handle cap 122 are coupled And an O-ring (not shown) for sealing is inserted into the gap.

Since the handle bundle 120 is widely used for opening and closing a valve disk in a general butterfly valve, a detailed description of the structure will be omitted, and thus the structure and shape of the handle bundle 120 are various The present invention is applicable to the butterfly valve 100 of the present invention.

The valve disc 130 is fixedly coupled to a portion of the handle bundle 120 where the shaft 121 is exposed to the inside of the flow passage 111 and is rotated by the rotation of the shaft 121, ).

When the valve disc 130 is inserted into the flow path 111 in the form of a metal disc corresponding to the diameter of the flow path 111 of the valve body 110, The valve disc 130 is opened and closed by the rotation of the shaft 121 as the side surface of the valve disc 130 is brought into contact with the bottom surface of the valve disc 130 at the lower side.

The valve disc 130 is fitted around the outer circumference of the valve disc 130 and is in close contact with the side wall of the flow path 111 to seal the valve disc 130 with the sealing member 131 .

The sealing member 131 is made of rubber or soft synthetic resin in the form of a circular ring corresponding to the circumferential length of the valve disc 130. The circumferential end of the valve disc 130 is recessed, And are coupled with a fastening structure in which the projections are mutually fitted.

The stopper 200 is installed at a position adjacent to the flow passage 111 on the side of the valve body 110 so that a part of the stopper 200 protrudes inside the flow passage 111, And the rotation angle at which the valve disc 130 is closed is precisely controlled by using a structure in which the protruded portion is fixed to the side surface of the valve disc 130 and fixed.

The stopper 200 is formed in the shape of a square block using a metal material. The stopper 200 is inserted into the stopper groove 210 formed on the side surface of the valve body 110, It is preferable to correspond to the formation size of the stopper groove 210.

In addition, the stopper 200 may be formed in such a manner that the protruded portion of the stopper 200 protrudes into the channel 111 according to the user's selection, and the tip of the bent portion is brought into contact with the side surface of the valve disc 130.

In this case, the stopper 200 is manufactured in a state where the stopper 200 is completely closed so that the valve disc 130 completely closes the flow path 111 or the fluid flows in an arbitrary gap. 200 to correspond to various rotational angles of the valve disc 130 by using a shape-like structure for adjusting the lengths of the bent portions of the valve disc 130. [

In this case, although the stopper 200 is shown as being bent in the shape of a letter, the stopper 200 may be formed in a rectangular plate shape.

The stopper 200 is inserted into the valve disc 130 of the butterfly valve 100 at a position where the valve disc 130 closes to the flow passage 111 and is fastened together with the stopper 200. When the valve disc 130 is closed, The rotation angle of the valve disc 130 close to the flow path 111 can be precisely controlled by the valve disc 130 so that the error of the rotation angle at which the valve disc 130 is closed can be reduced, It is possible to precisely control the flow rate of the fluid flowing through the unit time while preventing the leakage of the fluid in the completely closed state.

In addition, the stopper 200 is made of a magnetic metal material, and is firmly fixed in a state where the valve disc 130 is in contact with the end of the stopper 200 through magnetic force.

Meanwhile, the stopper 200 is made of a neodymium (Nd) magnet or a samarium-cobalt (Sm-Co) magnet made of an alloy of rare earth elements as a metal material having magnetism.

At this time, since the rare earth magnet has corrosion resistance and oxidation resistance, it is preferable to use nickel or copper-nickel plating on the surface of the stopper 200 made of a magnetic metal material.

The stopper 200 is inserted into a stopper groove 210 formed at a position adjacent to the flow path 111 and inserted into the stopper groove 210 from the side of the valve body 110, (Not shown).

At this time, the fixing bolt 220 has a general flat head bolt structure.

The stop bolt 220 for inserting the stopper 200 into the butterfly valve 100 is inserted into the stopper 200 from the side of the valve body 110, The use of a tool such as a drill or a screwdriver can be easily performed outside the flow path 111 having a narrow space. Therefore, the workability of the stopper 200 and the workability of the stopper 200 can be improved. The assemblability is increased and the tolerance to the mounting position of the stopper 200 after machining can be reduced, thereby minimizing the error with respect to the rotation angle at which the valve disc is closed.

4 is a view showing a butterfly valve for a transformer according to another embodiment.

4 shows another embodiment of the butterfly valve 100 according to the present invention. In the butterfly valve 100 having the above-described structure, the stopper 200 is connected to the oil passage 111, The stopper groove 210 has a clearance space which is inserted into the stopper groove 210 formed at the adjacent position and can move to the position before and after the passage of the flow passage 111, And is screwed into the fixing bolt 220 which is inserted inward and rotates in place,

The stopper 200 is moved forward and backward in the stopper groove 210 corresponding to the spiral rotation of the fixing bolt 220.

Meanwhile, the fixing bolt 220 is fixed to the finishing plate 230 coupled to the stopper groove 210 from the side surface of the valve body 110 so as to prevent the head from passing through the valve body 210,

At this time, when the fixing bolt 220 is passed through the finishing plate 230, a fastening part such as a toothed lock washer or a snap ring is used on the head side of the fixing bolt 220 So that it is preferable to prevent the escape.

As the stopper 200 is moved forward and backward in the stopper groove 210 by the spiral rotation of the fixing bolt 220, the stopper 200 The valve disc 130 can be easily adjusted in position.

As described above. While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It will be understood by those skilled in the art that various changes, modifications, and alterations can be made by those skilled in the art.

100. Valve 110. Valve body
120. Handle bundle 130. Valve disk
200. Stopper 210. Stopper Home
220. Fixing bolt 230. Finishing plate

Claims (4)

It is a butterfly valve that is applied to a transformer among general electric equipments to control the flow of insulating oil and enables the maintenance of the transformer without discharging the insulating oil stored in the transformer inside,
A valve body 110 having a passage 111 which is a portion directly coupled to the transformer and connected to the inside of the transformer and through which the insulating oil of the transformer flows;
The shaft 121 is coupled to an upper portion of the valve body 110 by a shaft 121 so that the shaft 121 is penetrated to expose a part of the lower part from the inside of the flow path 111, A handle bundle 120 that rotates to operate the valve disc 130;
A valve disc 130 which is fixedly coupled to the shaft 121 of the handle bundle 120 and which is exposed to the inside of the oil passage 111 and opens and closes the oil passage 111 by rotating the shaft 121 in place, Wow;
A portion protruding from the inside of the flow path 111 protrudes from the valve disc 110 at a position adjacent to the flow path 111 at a side surface of the valve body 110, And a stopper 200 for precisely controlling the rotation angle at which the valve disc 130 is closed by using a structure in which the valve disc 130 is fixed in contact with the side surface of the valve disc 130,
The valve disc 130 is inserted into the valve disc 130 and is tightly attached to the side wall of the flow path 111 to thereby seal the valve disc 130. [ And a member (131)
The stopper 200 is selectively made of a neodymium magnet or a samarium-cobalt (Sm-Co) magnet made of a magnetic metal material so that the valve disc 130 is magnetically coupled to the stopper 200, And is fixed in a state of being in contact with an end of the frame,
When the stopper 200 is made of a magnetic metal material, the surface of the stopper 200 is coated with nickel or copper-nickel,
The stopper 200 is inserted into the stopper groove 210 formed at a position adjacent to the flow path 111 and has a clearance space capable of moving before and after the flow path 111 in the through direction, Inserted into the groove 210 and screwed into the fixing bolt 220 rotating in place,
The fixing bolt 220 is fixed to the finishing plate 230 coupled to the stopper groove 210 from the side surface of the valve body 110 so as to prevent the head from penetrating,
Wherein the stopper (200) is moved forward and backward in the stopper groove (210) in response to the spiral rotation of the fixing bolt (220). delete delete delete
KR20140037987A 2014-03-31 2014-03-31 A butterfly valve for transformer KR101456010B1 (en)

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KR20140037987A KR101456010B1 (en) 2014-03-31 2014-03-31 A butterfly valve for transformer

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KR20140037987A KR101456010B1 (en) 2014-03-31 2014-03-31 A butterfly valve for transformer

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60249773A (en) * 1984-05-25 1985-12-10 Daiee Giken Kk Butterfly valve
JPH07183133A (en) * 1993-12-21 1995-07-21 Hanshin Koki Kk Radiator valve for electrical equipment such as transformer
KR101202464B1 (en) * 2012-04-27 2012-11-16 동아대학교 산학협력단 Butterfly valve with electromagnet stopper

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60249773A (en) * 1984-05-25 1985-12-10 Daiee Giken Kk Butterfly valve
JPH07183133A (en) * 1993-12-21 1995-07-21 Hanshin Koki Kk Radiator valve for electrical equipment such as transformer
KR101202464B1 (en) * 2012-04-27 2012-11-16 동아대학교 산학협력단 Butterfly valve with electromagnet stopper

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