KR101467141B1 - Watertight structur of shaft housing in butterfly valve - Google Patents

Watertight structur of shaft housing in butterfly valve Download PDF

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Publication number
KR101467141B1
KR101467141B1 KR20140012474A KR20140012474A KR101467141B1 KR 101467141 B1 KR101467141 B1 KR 101467141B1 KR 20140012474 A KR20140012474 A KR 20140012474A KR 20140012474 A KR20140012474 A KR 20140012474A KR 101467141 B1 KR101467141 B1 KR 101467141B1
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KR
South Korea
Prior art keywords
shaft
shaft housing
ring
butterfly valve
valve body
Prior art date
Application number
KR20140012474A
Other languages
Korean (ko)
Inventor
박근영
Original Assignee
박근영
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Application filed by 박근영 filed Critical 박근영
Priority to KR20140012474A priority Critical patent/KR101467141B1/en
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Publication of KR101467141B1 publication Critical patent/KR101467141B1/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
    • F16K1/226—Shaping or arrangements of the sealing
    • 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
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/46—Attachment of sealing rings
    • 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
    • F16K41/00—Spindle sealings
    • F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
    • F16K41/04—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing
    • F16K41/043—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing for spindles which only rotate, i.e. non-rising spindles
    • F16K41/046—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing for spindles which only rotate, i.e. non-rising spindles for rotating valves

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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 watertight structure for a shaft housing of a butterfly valve, including a valve body (110) made of cast iron or cast iron alloy and having a flow path; a shaft (120) made of stainless steel and connected to the valve body (110), the shaft being rotated by operation of an operating mechanism; a disc (130) fixed to the shaft (120) and rotatably mounted to the valve body (110), the disc opening or closing the flow path of the valve body (110) by rotation of the shaft (120); and a shaft housing (140) axially connected to the shaft (120) in a state of being mounted to the disc (130). An inlet of the shaft housing (140) to receive the shaft (120) is provided with a packing groove (141) to so that the shaft housing (140) and the shaft (120) are watertight. A pressing member (160) is made to have any one of an O-ring, a C-ring, or a semicircular ring. The pressing member (160) is forcibly fitted into a ring groove (121) formed on the outer circumference of the shaft (120), so that the packing member (150) is pressed between the packing groove (141) and the shaft (120).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a butterfly valve shaft housing,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a butterfly valve for opening and closing a fluid conduit or a gas conduit, and more particularly, to a butterfly valve for opening and closing a fluid channel or a gas conduit, C-ring, and semicircular ring, and the pressure member is forced into a ring groove formed in the shaft outer diameter, so that the packing member is pressed between the packing groove and the shaft, and the watertightness of the butterfly valve shaft housing Structure.

Generally, a butterfly valve is a valve that opens and closes a conduit by rotation of a shutoff valve, and is usually installed in a fluid pipe or gas pipe having a large size and high pressure.

1 is a cross-sectional view of a conventional butterfly valve, and FIG. 2 is a cross-sectional view of a butterfly valve of the prior art in which the airtightness of the conventional butterfly valve is maintained. Fig.

As shown in the drawing, the conventional butterfly valve includes a valve body 10 having a flow path formed therein, and an eccentric valve stem 21 having an insertion hole formed by opening or closing the flow path of the valve body 10, A valve disc 20 in which a seat space 22 is formed along the edge and one side release preventing hole 23 is formed at a side end portion of the seating space 22 in which the seat space 22 is formed; The rubber sheet 30 of the annular body placed on the ball 23 and the seat 22 of the valve disc 20 are securely seated through the bolt 41 in the seat space 22, Shaped seat seat 40 in which the rubber sheet 30 is fixed to the side surface of the valve disc 20 and the valve disc 20 A valve shaft 50 axially coupled to the insertion hole of the eccentric type valve seat 21 provided on the side surface of the valve body 50, Worth it consists of a driving unit (not shown) for engagement with the valve shaft 50, valve disk 20 provides a rotating force to open and close.

The conventional butterfly valve having such a configuration is configured such that when the valve disc 20 closes the flow path of the valve body 10 by operating the driving portion, the rubber sheet 30 fixed along the side surface of the valve disc 20 is guided to the valve body 10 so as not to leak the fluid.

The butterfly valve as described above treats the fluid contact surface to prevent corrosion by the fluid. The inner surface of the body of the butterfly valve and the disk are always in contact with the fluid. In addition, the outer surface of the body, which is not in contact with the fluid, is treated to prevent corrosion. Where the treatment is difficult, the shaft housing portion of the body into which the shaft is inserted. The shaft housing portion is a portion into which a shaft for supporting and driving the disk is inserted, which requires high accuracy, and therefore, it is difficult to perform a separate treatment.

In order to protect the shaft housing part of the butterfly valve from corrosion, it is best to prevent the fluid from penetrating. Each butterfly valve has a structure for blocking the infiltration of the fluid. In reality, it is impossible to completely prevent the interruption of the fluid. This is because a strong torque for driving the disk is transmitted to the shaft. If the fluid barrier property is increased, the torque of the shaft is increased. Also, the inserted o-ring or the like inserted for the purpose of blocking the fluid hardens after a lapse of time.

The lifetime of a butterfly valve depends on the operating environment, and is typically 10 to 20 years as valve life. The main reason that the valve can not be used at this time is due to serious corrosion of the shaft housing part. That is, the main reason for determining the lifetime of the butterfly valve is the corrosion of the shaft housing part, because it does not completely block the fluid penetrating into the shaft housing part.

Corrosion caused by fluid penetration of the shaft housing portion of the butterfly valve not only serves to shorten the life of the valve but also causes contamination of the fluid. Particularly, when butterfly valve is connected to tap water pipe, melting due to corrosion of shaft housing part is a cause of polluting water quality.

Korean Patent No. 10-1061095

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems of the prior art, and it is an object of the present invention to provide a packing groove in which a packing member is inserted into an inlet of a shaft housing into which a shaft of a butterfly valve is inserted, A compression member coupled to the shaft is formed in the form of a ring, a C ring, or a semicircular ring, and the pressing member is forced into a ring groove formed in the shaft outer diameter of the shaft so that the packing member is compressed between the packing groove and the shaft To provide a watertight structure of the butterfly valve shaft housing.

It is another object of the present invention to prolong the life of the valve by preventing fluid penetration of the shaft housing portion of the butterfly valve to prevent corrosion of the shaft housing portion.

Another object of the present invention is to prevent contamination of the fluid due to corrosion of the shaft housing portion, thereby preventing the stigma of water when the butterfly valve according to the present invention is applied to the water pipe.

According to an aspect of the present invention, there is provided a valve body comprising: a cast iron or cast iron alloy valve body; A shaft connected to the valve body and made of stainless steel and rotated by the operation of the opening / closing mechanism; A disk fixed to the shaft and rotatably mounted on the valve body and opening and closing the flow path of the valve body by rotation of the shaft; And a shaft for housing the shaft in a state where the shaft is mounted on the disk, wherein a packing groove for inserting the packing member is formed at the entrance of the shaft housing into which the shaft is inserted so that water tightness is established between the shaft housing and the shaft , The pressing member is formed in the form of a ring, a C ring, or a semicircular ring, and the pressing member is forced into a ring groove formed in the shaft outer diameter of the shaft so that the packing member is pressed between the packing groove and the shaft .

Further, the pressing member is characterized by having a wedge-shaped inclined surface in cross section which is inserted into the ring groove of the shaft to increase the pressing force.

In addition, a protrusion is formed on the inclined surface of the pressing member to prevent the pressing member pressed on the ring groove from being opened.

The present invention is characterized in that a packing groove in which a packing member is inserted is formed at an entrance of a shaft housing into which a shaft of a butterfly valve is inserted so that water tightness is formed between the shaft housing and the shaft, The present invention provides a watertight structure of a butterfly valve shaft housing in which the compression member is pressed into a ring groove formed in the shaft outer diameter and the packing member is pressed between the packing groove and the shaft Thereby preventing fluid penetration of the shaft housing portion of the butterfly valve and preventing corrosion of the shaft housing portion, thereby prolonging the life of the valve.

Further, the present invention has the effect of preventing stagnation of water when the butterfly valve according to the present invention is applied to a tap water pipe by preventing contamination of the fluid by corrosion of the shaft housing part.

1 is a sectional view showing a conventional butterfly valve,
FIG. 2 is a perspective exploded perspective view showing a portion of a conventional butterfly valve that maintains airtightness. FIG.
3 is a front view showing the watertight structure of the butterfly valve shaft housing according to one embodiment of the present invention.
4 is a plan view showing a watertight structure of a butterfly valve shaft housing according to an embodiment of the present invention.
5 is an enlarged view of part A of Fig. 3 showing the watertight structure of a butterfly valve shaft housing according to an embodiment of the present invention.
6 is a front view showing the watertight structure of the butterfly valve shaft housing according to another embodiment of the present invention.
7 is an enlarged view of a portion B in Fig.
8 is a perspective view showing the packing member of the present invention.

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

FIG. 3 is a front view showing a watertight structure of a butterfly valve shaft housing according to an embodiment of the present invention, FIG. 4 is a plan view showing a watertight structure of a butterfly valve shaft housing according to an embodiment of the present invention, 5 is an enlarged view of part A of Fig. 3 showing the watertight structure of the butterfly valve shaft housing according to an embodiment of the present invention.

3 to 5, a butterfly valve according to an embodiment of the present invention includes a valve body 110 made of a cast iron or cast iron alloy having a flow path, a valve body 110 connected to the valve body 110, A shaft 120 fixed to the shaft 120 and rotatably mounted on the valve body 110 and rotated by the rotation of the shaft 120, And a shaft housing 140 for axially coupling the shaft 120 in a state where the shaft 130 is mounted on the disk 130.

The valve body 110 is opened at both sides to form a flow path, thereby providing a structure in which the fluid can flow.

The disk 130 opens or closes the flow path of the valve body 110, and a sealing member for preventing leakage of the fluid is installed along the side surface.

A packing groove 141 is formed at the entrance of the shaft housing 140 into which the shaft 120 is inserted so that the shaft housing 140 and the shaft 120 are water tight. can do.

At this time, a separate pressing member 160 is axially coupled to the shaft 120 to prevent the packing member 150 from being separated.

The pressing member 160 is formed in a ring shape and is tightly engaged with the ring groove 121 formed in the shaft outer diameter of the shaft 120.

At this time, the pressing member 160 may be formed in a C-ring shape or may be manufactured in a semicircular shape and coupled.

The pressing member 160 functions to improve the watertightness by compressing the packing member 150 between the packing groove 141 and the shaft 120.

6 is a front view showing a watertight structure of a butterfly valve shaft housing according to another embodiment of the present invention.

6, the pressing member 160 may be formed of a wedge-shaped inclined surface 161 so as to be inserted into the ring groove 121 of the shaft 120 in order to increase the pressing force. For example, in the process of contracting the inner diametric end face of the pressing member 160 toward the ring groove 121 side, a vertical pressure is applied to press the packing member 150 against it.

7 is an enlarged view of a portion B in Fig. Referring to FIG. 7, a projecting protrusion 163 may be formed on the inclined surface 161 of the pressing member 160. The projecting protrusion 163 can prevent the pressing member 160 pressed against the ring groove 121 from being opened by providing a structure for suppressing slippage in the opposite direction of travel.

In addition, the packing member 150 of the present invention as shown in FIGS. 3 to 7 may be formed with a plurality of pleated layers 151.

8 is a perspective view showing the packing member of the present invention. 8, the pleated layer 151 expands the volume in the horizontal direction when the pressing member 160 is compressed to form a plurality of contact surfaces between the packing groove 141 and the shaft 120, .

In the present invention as described above, a packing groove for inserting a packing member is formed at an inlet of a shaft housing into which a shaft of a butterfly valve is inserted, so that water tightness is formed between the shaft housing and the shaft, A C-ring, and a semicircular ring, and the pressing member is forced into a ring groove formed in an outer diameter of the shaft so that the packing member is pressed between the packing groove and the shaft, By providing a watertight structure, the life of the valve can be extended by preventing fluid penetration of the shaft housing portion of the butterfly valve to prevent corrosion of the shaft housing portion.

Further, according to the present invention, contamination of the fluid due to corrosion of the shaft housing portion is prevented, so that stagnation of water can be prevented when the butterfly valve according to the present invention is applied to the water supply pipe.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. For example, a person skilled in the art can change the material, size and the like of each constituent element depending on the application field or can combine or substitute the embodiments in a form not clearly disclosed in the embodiments of the present invention, Of the range. Therefore, it should be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, and that such modified embodiments are included in the technical idea described in the claims of the present invention.

110: Valve body
120: shaft
121: Ring home
130: disk
140: Axial housing
141: Packing groove
143: pressing member seat groove
147: Female thread tab
150: packing member
151: Creased layer
160: pressing member
161: wedge slope
163: Fluttering

Claims (3)

A valve body 110 made of cast iron or cast iron alloy having a flow path; A shaft 120 connected to the valve body 110 and made of stainless steel and rotated by the operation of the opening / closing mechanism; A disk 130 fixed to the shaft 120 and rotatably mounted on the valve body 110 to open and close a flow path of the valve body 110 by rotation of the shaft 120; And a shaft housing (140) for axially coupling the shaft (120) while being mounted on the disk (130)
A packing groove 141 is formed at the entrance of the shaft housing 140 into which the shaft 120 is inserted so that the shaft housing 140 and the shaft 120 are watertight, The pressing member 160 is formed in the shape of a ring, a C ring, or a semicircular ring, and the pressing member 160 is forced into the ring groove 121 formed in the shaft outer diameter of the shaft 120, (150) is compressed between the packing groove (141) and the shaft (120).
The method according to claim 1,
The watertight structure of the butterfly valve shaft housing as set forth in claim 1, wherein the pressing member (160) is formed of a wedge-shaped inclined surface (161) so as to be inserted into the ring groove (121) of the shaft (120)
3. The method of claim 2,
Wherein a protrusion (163) is formed on the inclined surface (161) of the pressing member (160) to prevent the pressing member (160) pressed on the ring groove (121) from being opened.
KR20140012474A 2014-02-04 2014-02-04 Watertight structur of shaft housing in butterfly valve KR101467141B1 (en)

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KR20140012474A KR101467141B1 (en) 2014-02-04 2014-02-04 Watertight structur of shaft housing in butterfly valve

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KR20140012474A KR101467141B1 (en) 2014-02-04 2014-02-04 Watertight structur of shaft housing in butterfly valve

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102172920B1 (en) * 2019-11-29 2020-11-02 주식회사 피엔케이이엔지 Sealing ability reinforced type valve

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5289735U (en) * 1975-12-27 1977-07-05
JPS60188283U (en) * 1984-05-23 1985-12-13 日立造船株式会社 butterfly valve
JPH01178280U (en) * 1988-06-07 1989-12-20
JPH04105672U (en) * 1991-02-22 1992-09-11 エヌオーケー株式会社 butterfly valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5289735U (en) * 1975-12-27 1977-07-05
JPS60188283U (en) * 1984-05-23 1985-12-13 日立造船株式会社 butterfly valve
JPH01178280U (en) * 1988-06-07 1989-12-20
JPH04105672U (en) * 1991-02-22 1992-09-11 エヌオーケー株式会社 butterfly valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102172920B1 (en) * 2019-11-29 2020-11-02 주식회사 피엔케이이엔지 Sealing ability reinforced type valve

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