KR20150078188A - Double-disc type butterfly valve having preliminary seal - Google Patents

Double-disc type butterfly valve having preliminary seal Download PDF

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Publication number
KR20150078188A
KR20150078188A KR1020130167361A KR20130167361A KR20150078188A KR 20150078188 A KR20150078188 A KR 20150078188A KR 1020130167361 A KR1020130167361 A KR 1020130167361A KR 20130167361 A KR20130167361 A KR 20130167361A KR 20150078188 A KR20150078188 A KR 20150078188A
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South Korea
Prior art keywords
valve body
disk
fixing member
seat ring
metal sheet
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KR1020130167361A
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Korean (ko)
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KR101567790B1 (en
Inventor
김만영
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서광공업 주식회사
김만영
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Priority to KR1020130167361A priority Critical patent/KR101567790B1/en
Publication of KR20150078188A publication Critical patent/KR20150078188A/en
Application granted granted Critical
Publication of KR101567790B1 publication Critical patent/KR101567790B1/en

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Abstract

The present invention relates to a butterfly valve, comprising: a first disk and a second disk which are rotatably mounted in a valve body and open and close a flow path of the valve body and installed facing each other at regular intervals; A first sealing portion provided between the outer circumferential surface of the disc and the inner circumferential surface of the valve body to be pressurized when the conduit is closed to block the leakage of water and a second sealing portion provided between the outer circumferential surface of the second disc and the inner circumferential portion of the valve body, A double disc type butterfly valve is provided which has a spare chamber including a second sealing portion for blocking the leakage of water.

Description

DISC TYPE BUTTERFLY VALVE HAVING PRELIMINARY SEAL "

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a butterfly valve, and more particularly, to a butterfly valve that regulates a flow of a fluid in accordance with rotation of a double disk disposed inside a valve body.

In general, a valve is installed in a part of a pipe formed by a pipe or the like which forms a passage of a fluid, and is a device that allows the flow to be stopped or the flow of the fluid to be controlled.

Among these valves, the butterfly valve is configured to open and close the conduit according to the rotation of the disk provided inside the valve body. Butterfly valves are typically installed between piping and are fastened to piping by fastening means such as bolts and nuts.

Despite the engagement with such pipes, when the hydraulic pressure is large, there is a case where the fluid leaks between the disk and the valve body when the valve is closed.

In particular, in the case of a double disc type butterfly valve, it is required to seal each of the two discs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a double disc butterfly valve which is more simply and conveniently fastened to a piping and is further complemented with sealing of a fluid.

In one or more embodiments of the present invention, there is provided a valve assembly comprising: a valve body installed between piping; A first disk and a second disk rotatably installed inside the valve body and opening and closing the flow path of the valve body and facing each other at regular intervals; A first sealing part installed between the outer circumferential surface of the first disk and the inner circumferential part of the valve body so as to be squeezed when the conduit is closed; And a second sealing part provided between the outer circumferential surface of the second disk and the inner circumferential surface of the valve body to be pressurized when the conduit is closed so as to block the leakage of water. The first sealing part is formed inside the valve body, Providing a pneumatic delivery passage; And a first portion is disposed inside the valve body and connected to the pneumatic pressure providing passage and the second portion includes an annular rubber seat ring protruding outside the valve body and closely contacting the outer circumferential surface of the first disk A double disk butterfly valve having a reserve chamber can be provided.

Wherein the rubber seat ring includes a seat ring insertion portion protruding from the valve body toward the first disk and a second ring member formed on an outer side of the seat ring insertion portion and interposed between the first fixing member engaged with the seat ring insertion portion, So as to be movable.

The rubber seat ring is characterized in that a portion in contact with the first disk is formed to be inclined downward toward the inside of the valve body.

The seat ring insertion portion includes a first fixing bolt passing through a first fixing bolt through hole formed in the first fixing member and inserted and fixed in a first fixing bolt insertion groove formed in the seat ring insertion portion, And is coupled to the first fixing member by a first adjusting bolt passing through the first adjusting bolt through-hole formed in the member and contacting the surface of the seat ring insertion portion.

An O-ring may be formed between the fixing member and the seat ring insertion portion, and the second disk may be formed with protrusions protruding from the outside.

The second sealing portion may include an annular metal sheet formed between the projection of the second disk and the valve body; A second fixing member coupled to the metal sheet to adhere the metal sheet to the second disk; And a second adjusting unit inserted into the second fixing member to adjust a gap between the metal sheet and the second disk.

The metal sheet is formed in a " C "shape, and has an upper portion in contact with the projection; A lower portion slidingly contacting the surface of the body; And a connection part connecting the upper part and the lower part.

The second adjusting unit is inserted into a second fixing bolt insertion groove formed in the metal sheet and passes through a second fixing bolt through hole formed in the second fixing member, Fixing bolt; And an adjusting bolt formed through the second adjusting bolt through-hole formed in the second fixing member and formed in contact with the surface of the metal sheet.

And the lower surface of the upper surface of the metal sheet is flat so as to be in sliding contact with the upper surface of the second fixing member.

A pair of O-rings are formed between the metal sheet and the valve body, and the first disk and the rubber seat ring are inclined downward toward the inner space of the valve body.

And the upper surface of the upper portion is inclined downward toward the inner space of the valve body.

According to the present invention having the above-described structure, double sealing is performed at both sides of the disk, so that the sealing of the fluid can be further strengthened irrespective of the flow direction.

Further, there is an advantage that the pressing amount of the fixing member can be easily adjusted by using the adjustment unit.

1 is a side cross-sectional view of a butterfly valve according to one embodiment of the present invention.
Figure 2 is a schematic front view of the butterfly valve shown in Figure 1;
3 is an enlarged cross-sectional view of an enlarged view of a portion A in Fig.
4 is an enlarged cross-sectional view showing an enlarged view of a portion B in Fig.
5 is an assembled sectional view of a fixing bolt and an adjusting bolt.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described in detail below. However, it is to be understood that the present invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It is intended that the disclosure of the present invention be limited only by the terms of the appended claims.

Hereinafter, a double disc butterfly valve having a reserve chamber related to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side cross-sectional view of a butterfly valve according to one embodiment of the present invention, and FIG. 2 is a schematic front view of a butterfly valve shown in FIG.

1 and 2, the butterfly valve includes a valve body 100 installed between the pipes 101 and 102, and a pair of disks 105 and 106 for opening and closing the flow path of the valve body 100 .

The valve body 100 is formed in a substantially cylindrical shape so that the fluid introduced from the first pipe 101 is provided on the opposite side of the first pipe 101 through the internal space 103 of the cylindrical valve body 100 To the second piping 102, which is the second piping. That is, the inner space 103 of the valve body 100 forms a flow path through which the fluid can flow, and both ends of the valve body 100 are opened to continuously extend the flow path without interruption. Alternatively, the fluid introduced through the second pipe 102 may flow through the first pipe 101.

The inner space 103 is provided with a pair of disks 105 and 106, which can open and close the upper flow path. The pair of discs 105 and 106 are rotatably mounted on the valve body 100 to open and close the flow path, and are formed at predetermined intervals.

A shaft 130 (see FIG. 2) connected to an opening / closing mechanism (not shown) is fixed to one surface of the pair of disks 105 and 106. The disks 105 and 106 are rotated in the inner space 103 by the operation of the opening / closing mechanism.

The disks 105 and 106 open or close the flow path while closing the flow path (closed state) and rotating along the rotation direction T with respect to the center O of the disks 105 and 106 (open state). In order to completely open the flow path, the discs 105 and 106 may rotate along the rotational direction T by approximately 90 degrees. That is, the surface of the disks 105 and 106 may be adjusted so as to be parallel to the flow direction of the fluid.

The valve body 100 is coupled with fasteners 110 and 120 for fastening the valve body 100 to the pipes 101 and 102. The fasteners 110 and 120 are formed on the pipes 101 and 102, And fastened to flanges 107 and 108, respectively.

The fasteners 110 and 120 may be formed in plural along the circumferential direction of the valve body 100 and the intervals between the fasteners 110 and 120 along the circumferential direction may be equally spaced.

The fasteners 110 and 120 are provided with threaded holes 112 and 122 for threaded engagement with the flanges 107 and 108 of the piping 101 and 102, respectively. The fasteners 110 and 120 are fastened to the pair of disks 105 and 106 while facing the flanges 107 and 108 of the pipes 101 and 102, respectively.

A first flange 111 and a second flange 121 are formed at both ends of the valve body 100. The first flange 111 and the second flange 111 protrude from the outer circumferential surface of the valve body 100 by a predetermined height . The fasteners 110 and 120 may include a first fastener 110 protruding from the first flange 111 and a second fastener 120 protruding from the second flange 121. The first fastener 111 is fastened to the flange 107 of the first pipe 101 and the second fastener 120 is fastened to the flange 108 of the second pipe 102.

FIG. 3 is an enlarged cross-sectional view of the portion A of FIG. 1, showing a first sealing portion 200 provided between the outer peripheral surface of the first disk 105 and the inner diameter portion of the valve body, Referring to FIG. 3, the first sealing part 200 includes a pneumatic pressure providing passage 220 formed inside the valve body 100 to provide pneumatic pressure, and a first part 212, The second part 211 is protruded to the outside of the valve body 100 and is disposed on the outer circumferential surface 105a of the first disk 105 And may include an annular rubber seat ring 210 which is closely attached. At this time, the rubber seat ring 210 is formed on the outer side of the seat ring inserting portion 140 and the seat ring inserting portion 140 protruding from the valve body 100 toward the first disk 105, Is inserted into the space (250) defined by the first fixing member (240), which is coupled with the seat ring insertion portion (140) and forms a space, so as to be movable by air pressure. That is, as the rubber seat ring 210 is closely attached to the first disk 105, the space 250 is gradually reduced.

According to an embodiment of the present invention, the first disk 105 is formed to be inclined downward toward the inner space 103 of the valve body 100, and the rubber that is in contact with the first disk 105 The second portion 211 of the seat ring 210 also has a shape corresponding to the outer peripheral surface 105a of the first disk 105. [ That is, both the first disk 105 and the rubber seat ring 210 are formed to be inclined downward toward the inner space 103 of the valve body 100.

The first fixing member 240 is coupled to the seat ring insertion portion 140 by a first adjusting unit 230. The first adjusting unit 230 includes a first fixing bolt 231 and a first adjusting bolt 231. [ Lt; / RTI > The first fixing bolt 231 passes through a first fixing bolt through hole 241 formed in the first fixing member 240 and is inserted into a first fixing bolt insertion groove 141 formed in the seat ring insertion portion . The first adjustment bolt 232 may pass through the first adjustment bolt through hole 242 formed in the first fixing member 240 and may be in contact with the surface 143 of the seat ring insertion portion 140.

Referring to FIG. 5, the first fixing bolt 231 includes a first fixing member 240 and a seat ring insertion portion 240. The first fixing bolt 231 and the second fixing bolt 231 are coupled to each other, And the first adjustment bolt 232 can adjust the gap D1 between the first fixing member 240 and the seat ring insertion portion 140 (see FIG. 3). That is, if the first fixing bolt 231 is tightened while the first adjusting bolt 232 is loosened, the first fixing member 240 and the seat ring insertion portion 140 move relative to each other in the direction of approaching each other, . When the first fixing bolt 231 is loosened and the first adjusting bolt 232 is tightened, the first fixing member 240 and the seat ring insertion portion 140 are relatively moved in directions away from each other. When the first fixing bolt 231 is tightened in this state, the position of the seat ring insertion portion 140 is fixed. The pressing amount of the rubber seat ring 210 can be adjusted by adjusting the position of the rubber seat ring 210 by using the first fixing bolt 231 and the first adjusting bolt 232 as described above. At this time, the head 231a of the first fixing bolt 231 is supported by the outer surface of the first fixing member 240.

The second portion 211 of the rubber seat ring 210 is spaced apart from the outer circumferential surface 105a of the first disk 105 as the distance D1 between the first fixing member 240 and the seat ring insertion portion 140 becomes smaller. The leakage can be blocked more effectively.

The rubber sheet ring 210 can move finely while contacting the outer circumferential surface 105a of the first disk 105 by the above-described principle. At this time, an O-ring 180 is disposed on the contact surface between the first fixing member 240 and the seat ring insertion portion 140 to prevent the inflow and outflow of the fluid.

According to an embodiment of the present invention, the rubber seat ring 210 is in close contact with the outer circumferential surface 105a of the first disk 105 while moving up and down by pneumatic pressure, A space 250 is formed so as to move toward the outer peripheral surface 105a of the disk. At this time, the pneumatic pressure is supplied from the outside and may be supplied by a hydraulic cylinder or the like, but is not limited thereto.

FIG. 4 is an enlarged cross-sectional view of part B of FIG. 1, illustrating a second sealing part 300 according to an embodiment of the present invention. The second sealing part 300 includes a second sealing part 300, An annular metal sheet 310 formed between the valve body 100 and a second fixing member 310 coupled to the metal sheet 310 to adjust the distance between the metal sheet 310 and the second disk 106, And a second adjusting unit 330 inserted into the second fixing member 320 to adjust the interval between the metal sheet 310 and the second disk 106. [

The second adjusting unit 330 passes through a second fixing bolt through hole 321 formed in the second fixing member 320 and is inserted into a second fixing bolt insertion groove 311 formed in the metal sheet 310 A second fixing bolt 331 inserted through the second fixing member 320 to couple the second fixing member 320 to the metal sheet 320 and a second adjusting bolt through hole 322 formed in the second fixing member 320 And a second adjustment bolt 332 formed to be in contact with the surface 315 of the metal sheet 310.

At this time, since the second adjusting unit 330 has the same configuration as that of the first adjusting unit 230, it will be replaced with the above description with reference to FIG.

The metal sheet 310 has an approximately "C" shape and includes an upper portion 312 formed adjacent to the second disk 106, a lower portion 314 and a lower portion 314 which are moved on the surface 100a of the valve body 100 312 and a lower portion 314 of the valve body 100. The surface of the upper portion 312 may be inclined downward toward the inner space 103 of the valve body 100, 106). A projection 106a is formed on the lower portion of the second disk 106 to perform sealing by contacting with the upper portion 312. [ That is, the protrusion 106a protrudes along the outer circumferential surface of the second disk 106 so as to be in contact with the metal sheet 310. [ The protrusion 106a may be formed of a metal material, such as the metal sheet 310, and may be formed on the outer circumferential surface of the second disc 106 by welding. The protrusion 106a contacts the metal sheet 310 in a state where the second disc 106 is closed and thereby the seal between the valve body 100 and the second disc 106 can be sealed.

O rings 281, 282 and 280 are provided for sealing between the metal sheet 310 and the valve body 100. A cover 340 is provided outside the second adjusting unit 330 have.

Hereinafter, the operation of the second sealing part will be described.

Referring to FIG. 4, the lower surface 312a of the upper portion 312 of the metal sheet 310 is at least partially flat and is capable of sliding contact with the upper surface 320a of the second fixing member 320. For sealing, the metal sheet 310 must move toward the inside of the second disk 106, and it is the second adjustment unit 330 that controls the movement. The interval D2 is adjusted by the second fixing bolt 331 and the second adjusting bolt 332 of the second adjusting unit 330. [ At this time, the second fixing member 320 is fixed, and the metal sheet 310 slides on the upper surface 320a of the second fixing member 320 and the surface 100a of the valve body 100.

As the distance D2 between the metal sheet 310 and the second fixing member 320 increases, the upper portion 312 of the metal sheet 310 is more closely contacted with the protrusion 106a, .

As described above, according to the embodiment of the present invention, since the first and second sealing parts 200 and 300 are provided on both sides of the pair of disks 105 and 106, The leakage will be blocked. That is, in the embodiment of the present invention, the first sealing part 200 capable of sealing by pneumatic pressure is provided, so that leakage of water can be prevented in advance.

The double disc type butterfly valve having the above-described spare chamber can be applied to a case where the configuration and method of the above-described embodiments are not limitedly applied, but the embodiments can be applied to all or a part of each embodiment Some of which may be selectively combined.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be interpreted as being included in the scope of the present invention .

Claims (13)

A valve body installed between the pipes;
A first disk and a second disk rotatably installed inside the valve body and opening and closing the flow path of the valve body and facing each other at regular intervals;
A first sealing part installed between the outer circumferential surface of the first disk and the inner circumferential part of the valve body so as to be squeezed when the conduit is closed; And
And a second sealing part provided between the outer circumferential surface of the second disk and the inner circumferential part of the valve body,
Wherein the first sealing portion
A pneumatic pressure providing passage formed inside the valve body to provide a pneumatic pressure; And
The first portion is disposed inside the valve body and connected to the pneumatic pressure providing passage and the second portion includes an annular rubber seat ring protruding outside the valve body and closely contacting the outer circumferential surface of the first disk A double disk butterfly valve having a preliminary chamber made of stainless steel. The method according to claim 1,
Wherein the rubber seat ring includes a seat ring insertion portion protruding from the valve body toward the first disk and a second ring member formed on the outer side of the seat ring insertion portion and interposed between the first fixing member engaged with the seat ring insertion portion, Is inserted in such a manner that it can be moved by a spring. 3. The method of claim 2,
Wherein the rubber sheet ring comprises:
Wherein a portion contacting the first disk is formed to be inclined downward toward the inside of the valve body. The method of claim 3,
The seat ring insertion portion
A first fixing bolt passing through a first fixing bolt through hole formed in the first fixing member and inserted and fixed in a first fixing bolt insertion groove formed in the seat ring insertion portion,
Wherein the first fixing bolt is coupled to the first fixing member by a first adjusting bolt passing through the first adjusting bolt through-hole formed in the first fixing member and contacting the surface of the seat ring insertion portion. Butterfly valve. 5. The method of claim 4,
And an O-ring is formed between the fixing member and the seat ring insertion portion. The method according to claim 1,
Wherein the second disk is formed with protrusions protruding outwardly. ≪ RTI ID = 0.0 > 11. < / RTI > The method according to claim 6,
And the second sealing portion
An annular metal sheet formed between the projection of the second disk and the valve body;
A second fixing member coupled to the metal sheet to adhere the metal sheet to the second disk; And
And a second adjusting unit inserted in the second fixing member to adjust the distance between the metal sheet and the second disk. 8. The method of claim 7,
The metal sheet is formed in a "C" shape,
An upper portion in contact with the projection;
A lower portion slidingly contacting the surface of the body; And
And a connecting portion connecting the upper portion and the lower portion. 9. The method of claim 8,
The second adjusting unit is inserted into a second fixing bolt insertion groove formed in the metal sheet and passes through a second fixing bolt through hole formed in the second fixing member, Fixing bolt; And
And a control bolt formed through the second adjustment bolt through-hole formed in the second fixing member and formed in contact with the surface of the metal sheet. 9. The method of claim 8,
Wherein the upper surface of the metal sheet is in plane contact with the upper surface of the second fixing member so as to be in sliding contact with the upper surface of the second fixing member. 9. The method of claim 8,
And a pair of O-rings are formed between the metal sheet and the valve body. The method according to claim 1,
Wherein the first disc and the rubber seat ring are inclined downward toward the inner space of the valve body. 9. The method of claim 8,
Wherein the upper surface of the upper portion is inclined downward toward the inner space of the valve body.
KR1020130167361A 2013-12-30 2013-12-30 Double-disc type butterfly valve having preliminary seal KR101567790B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020130167361A KR101567790B1 (en) 2013-12-30 2013-12-30 Double-disc type butterfly valve having preliminary seal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020130167361A KR101567790B1 (en) 2013-12-30 2013-12-30 Double-disc type butterfly valve having preliminary seal

Publications (2)

Publication Number Publication Date
KR20150078188A true KR20150078188A (en) 2015-07-08
KR101567790B1 KR101567790B1 (en) 2015-11-11

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Family Applications (1)

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Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001336643A (en) * 2000-05-29 2001-12-07 Nishi Nippon Sekkei Kogyo Kk Seal device for double water seal butterfly valve and its safety lock device
KR100687294B1 (en) * 2004-12-09 2007-03-02 서광공업 주식회사 Floating type apparatus preventing water leakage of butterfly valve
KR101096525B1 (en) * 2011-04-26 2011-12-20 서광공업 주식회사 Butterfly valve having function of maintaining sealing performance under low and high temperature

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