KR20120000326A - Packing for valve - Google Patents

Packing for valve Download PDF

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Publication number
KR20120000326A
KR20120000326A KR1020100060640A KR20100060640A KR20120000326A KR 20120000326 A KR20120000326 A KR 20120000326A KR 1020100060640 A KR1020100060640 A KR 1020100060640A KR 20100060640 A KR20100060640 A KR 20100060640A KR 20120000326 A KR20120000326 A KR 20120000326A
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KR
South Korea
Prior art keywords
packing
valve
stem
valve body
fluid
Prior art date
Application number
KR1020100060640A
Other languages
Korean (ko)
Other versions
KR101197372B1 (en
Inventor
곽경민
박석균
전두환
Original Assignee
(재)한국섬유기계연구소
주식회사 대정밸브
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by (재)한국섬유기계연구소, 주식회사 대정밸브 filed Critical (재)한국섬유기계연구소
Priority to KR20100060640A priority Critical patent/KR101197372B1/en
Publication of KR20120000326A publication Critical patent/KR20120000326A/en
Application granted granted Critical
Publication of KR101197372B1 publication Critical patent/KR101197372B1/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)
  • Details Of Valves (AREA)

Abstract

The present invention relates to an airtight packing for a valve that can efficiently maintain and maintain the original object for airtight while eliminating maintenance due to long-term use, thereby allowing the stem to pass through the center. Forming a stem hole so that the outer diameter is connected to the valve body and forming an annular rim so that the packing body is formed in a roughly ring shape, and the inner and outer surfaces of the rim are connected to the stem and the valve body in a stable state. An airtight packing for a valve which prevents leakage of fluid by forming a vertical surface of a predetermined length so as to block a minute gap between a stem and a valve body constituting the valve;
The packing consists of a lower packing seated on the settling formed in the valve body, a middle packing stacked on the upper part of the lower packing, and an upper packing seated on the upper part of the middle packing to be clamped to the packing gland. In the lower packing and middle padding, the packing body is expanded in the direction of the valve body and the stem by receiving the pressure of the fluid flowing through the valve, thereby forming a fluid passage for increasing airtightness.

Description

Sealing packing for valves {PACKING FOR VALVE}

The present invention relates to an airtight packing for a valve, and more particularly, to an improved packing to improve the airtightness of a packing by using the pressure of a fluid passing through the valve as well as the airtightness of the packing itself mounted on the valve. .

Various types of valves used for controlling the flow of fluids have been developed and used. Among them, butterfly valves are frequently used due to their ability to appropriately control the flow rate of fluids. Looking at the configuration of the butterfly valve used for the purpose of controlling the flow rate of FIG. 1 as follows.

Conventional butterfly valve 100 is provided with a valve body 102 having a flow path hole 101 in the center to allow fluid to flow, the flow path 101 can control the flow rate by opening and closing. The disk 103 is connected with the stem 104 which is rotatably operated by the operating means.

The disc 103 and the valve body 102 are intermittent to the seat retainer 106 via the valve seat 105 as a means for maintaining airtightness, and the bottom of the stem 104 is airtight for airtightness. Finish with cover 108 via the ash 107.

The stem bearing 109 may be interposed between the stem 104 and the valve body 102 so as to ensure smooth operation of the stem 104 on the upper side of the stem 104. After opening the packing 110 so as to be finished with a packing gland (Packing Gland, 111).

Conventionally, the packing 1 has been applied to prevent the fluid from leaking between the valve stem and the valve body.

A roughly ring-shaped packing body 6 having a stem hole 3 formed therein so that the stem 2 can pass through the center thereof and an outer rim having an annular rim 5 so as to be connected to the valve body 4. It is provided.

The rim 5 has a mountain-shaped indentation part 8 so that the upper part is formed with a protruding portion 7 protruding in the shape of a mountain, and the lower surface thereof can be seated on the protruding portion 7 of the packing body 6 which is connected to the lower side. The inner and outer diameter surfaces of the rim 5 are formed by forming a vertical surface 10 of a predetermined length to enable a stable connection with the stem 2 and the valve body 4.

The packing as described above is used after being combined with the stem and stacked into the packing gland as a plurality of layers are stacked. In this process, the packing is kept airtight as follows.

Since the packing gland is pressurized to the upper side of the packing coupled to the stem, the protrusions and indentations formed in the shape of the mountain of each packing body are spread out in the shape of the mountain, and the inner diameter of the packing body is connected to the stem, and the outer diameter of the packing body is the valve. In contact with the body to maintain confidentiality.

In this state, the inner diameter surface of the packing body is worn while the stem operates the disk. At this time, the packing gland is periodically tightened to press each packing to be laminated and deform in the direction of the stem and the valve body. To keep it confidential.

However, since the wear state of the valve cannot be visually checked in the process of using the valve, it is difficult to maintain the normal airtight state without checking the leakage state until the leakage of the fluid is visually confirmed by the operator or the manager.

In addition, it is difficult to check whether each packing is normally combined with the stem or valve body in the state of assembling the valve at the initial stage.In this case, the packing gland after visually confirming the airtightness through the fluid is passed. It is inconvenient to adjust the airtight to maintain confidentiality.

The packing gland is adjusted to pressurize the multi-stacked packing to control the airtightness. Therefore, the packing at the bottom and top is excessively applied to the packing, and the packing at the middle is weak in transmitting the control force of the packing gland. However, since it is impossible to maintain the uniformity of the fluid and leaks through the packing, it is impossible to fundamentally block the phenomenon of leaking through the packing, which causes various problems such as degrading the overall quality of the valve.

Therefore, in the present invention, the invention has been invented to solve the above problems, forming a stem hole in the center so that the stem can pass through, and the outer diameter of the packing having an outline rim to form an annular rim to be connected to the valve body The inner and outer surfaces of the body and the rim form a vertical surface having a predetermined length to allow a stable connection with the stem and the valve body to block the minute gap between the valve body and the stem constituting the valve to prevent leakage of fluid. In the airtight packing for valve which prevents;

The packing consists of a lower packing seated on the settling formed in the valve body, a middle packing stacked on the upper part of the lower packing, and an upper packing seated on the upper part of the middle packing to be clamped to the packing gland. In the lower packing and middle padding, the packing body is inflated in the direction of the valve body and the stem by receiving the pressure of the fluid flowing through the valve to form a fluid passage to increase the airtightness, thereby providing an original purpose for maintaining airtightness. It is possible to achieve maintenance faithfully while eliminating maintenance due to long-term use, which makes it possible to use and manage efficiently.

According to the present invention, when the airtightness is maintained between the stem and the valve body by using the packing, the pressure of the fluid passing through the valve is introduced to expand or expand the packing with the fluid pressure so that the packing is in close contact with the stem and the valve body. It is an invention having various effects, such as improving the quality and durability of the valve to achieve the original purpose of the packing to ensure the airtightness even if not separately pressurized to be in the competitive advantage.

1 is a perspective view of an exploded state showing the valve shown for explaining the present invention.
Figure 2 is a perspective view of the exploded state showing the hermetic packing for the valve to which the technique of the present invention is applied.
Figure 3 is a cross-sectional view showing a state in which the airtight packing for the valve to which the technique of the present invention is applied.
Figure 4 is a cross-sectional view showing a state in which the airtight packing for the valve to which the technique of the present invention is applied.
Figure 5 is a block diagram showing a hermetic packing for the valve to which the prior art is applied.

Hereinafter, with reference to the accompanying drawings will be described a preferred configuration and operation of the present invention for achieving the above object.

1 is a perspective view of an exploded state showing a valve shown for explaining the present invention, Figure 2 is a perspective view of an exploded state showing an airtight packing for a valve to which the technique of the present invention is applied, Figure 3 is a technique of the present invention 4 is a cross-sectional view showing a state in which an airtight packing for valves is applied, and FIG. 4 is a cross-sectional view showing a state in which the airtight packing for valves to which the technique of the present invention is applied is mounted.

The valve 100 for controlling the flow of fluid, such as a conventional butterfly, has a valve body 102 having a flow path 101 so that the fluid can flow in the center, and the flow path 101 has a valve body 102. The disc 103 is connected to the stem 104 which is rotationally operated by the operating means so that the flow rate can be controlled by the lungs.

The disc 103 and the valve body 102 are intermittent to the seat retainer 106 via the valve seat 105 as a means for maintaining airtightness, and the bottom of the stem 104 is airtight for airtightness. Finish with cover 108 via the ash 107.

The stem bearing 109 may be interposed between the stem 104 and the valve body 102 so as to ensure smooth operation of the stem 104 on the upper side of the stem 104. After opening the packing 110 so as to be finished with a packing gland (Packing Gland, 111).

The packing 110 forms a stem hole 112 to allow the stem 104 to pass through the center, and an outer diameter of the packing 110 to form an annular rim 113 so as to be connected to the valve body 102. A packing body 114 is provided.

The inner diameter surface 115 and the outer diameter surface 116 of the rim 113 is formed by forming a vertical surface 117 of a predetermined length to enable a stable connection with the stem 104 and the valve body 102.

In the present invention, the packing 110 is improved to receive the pressure of the fluid flowing through the valve 100 so as to maintain the airtightness between the valve body 102 and the stem 104.

To this end, the packing 110 of the present invention has a lower packing 120 seated on the settled jaw 119 formed in the valve body 102 and a plurality of middle packings 121 stacked on the lower packing 120. And an upper packing 122 seated on an upper portion of the middle packing 121 and clamped to the packing gland 111.

The lower and upper surfaces of the lower packing 120 and the upper packing 122 form a flat contact portion 125 to be in close contact with the settling jaw 120 and the packing gland 111, and the lower packing 120 The upper surface of the middle and the upper surface of the middle packing 121 is formed with a mountain-shaped protrusion 126, the lower surface of the middle patch 121 and the upper packing 122 is formed in the lower portion of the lower packing by forming a recessed portion (127) The middle packing 121 is seated at the position 120, and the upper packing 122 is seated on the middle packing 121.

In the lower packing 121 and the middle packing 122, a packing body 114 constituting each middle packing 121 is formed by receiving the pressure of the fluid flowing through the valve 100. A fluid passage 130 is formed to expand in the 104 direction to increase airtightness.

The upper packing 122 or the middle packing 121 stacked on the top end may not be provided with a distribution hole 130 to prevent the fluid from leaking out of the packing 110.

The fluid passage 130 may be implemented in various forms such as forming one hole in one packing body 114 or forming a plurality of holes in the packing body 114 to limit a specific shape or shape. The description is omitted.

In particular, the fluid passage 130 formed in the lower packing 121 is formed in the center of the protrusion 126 of the packing body 114 so that the fluid pressure can be transmitted to the middle packing 121 in a state in which the fluid pressure is not biased in one direction. Good to do.

Looking at the process of maintaining the airtight packing 110 is applied between the valve body 102 and the stem 104 is applied as described above as follows.

After the assembly of the packing 110 is completed, the fluid passing through the valve 110 is controlled. In this process, the fluid and the pressure of the fluid are conducted to the packing 110 and the packing gland 111 is pressurized from above. The packing 110 is expanded in the direction of the valve body 102 and the stem 104 by the force applied by the fluid pressure from the lower side to maintain the airtightness.

In detail, when the fluid passes through the valve 100, the pressure of the fluid is introduced into the fine gap between the valve body 102 and the stem 104 to form the bottom of the lower packing 120 constituting the packing 110. After being introduced into, it is supplied to the middle packing 121 stacked in multiple stages through the fluid passage 130.

Then, the middle packing 121 expands in the left and right directions along with the up and down directions due to the fluid pressure, and at the same time, the packing gland 111 located on the upper part of the upper packing 122 generates the pressing force in the downward direction. Therefore, the packing body 114 and the valve body 102 and the stem 104 is in close contact with each other, so that the fluid can be prevented from leaking.

In particular, in the present invention, since the pressure conducted to the packing 110 is changed according to the pressure of the fluid passing through the valve 100 and the expansion state of the packing 110 is changed accordingly, airtightness is facilitated, of course, the valve. The long-term use of (100), even if there is abrasion of the surface in contact with the valve body 102 or the stem 104, the pressure is operated by the amount of wear to further expand the packing 110, so as not to interfere with airtightness will be.

The present invention can increase the airtightness by blocking the minute gap between the valve body and the stem by inflating the packing by using the pressure of the fluid passing through the valve without having to pressurize the packing by periodically tightening the packing gland, It has various advantages, such as the effort and cost of the separate maintenance for long-term use.

100; valve
102; Valve body
104; Stem
110; packing
114; Packing body
120; Lower Packing
121; Middle packing
122; Upper packing
125; Contact
126; projection part
127; Indentation
130; Fluid passage

Claims (2)

The stem body 112 is formed in the center so that the stem 104 can pass therethrough, and the outer body is formed in an annular rim 113 so as to be connected to the valve body 102. )Wow;
On the inner diameter surface 115 and the outer diameter surface 116 of the rim 113, a vertical surface 117 of a predetermined length is formed to allow a stable connection with the stem 104 and the valve body 102 to form a valve 100. In the airtight packing (110) for the valve to prevent the leakage of fluid by blocking the fine gap between the valve body 102 and the stem 104 constituting the;
The packing 110 includes a lower packing 120 seated on a settling 119 formed in the valve body 102;
Middle packing (121) and a plurality of stacked on top of the lower packing (120);
An upper packing 122 seated on an upper portion of the middle packing 121 and cracked by a packing gland 111;
The lower packing 121 and the middle packing 122 receive the pressure of the fluid flowing through the valve 100 to expand the packing body 114 toward the valve body 102 and the stem 104 to increase airtightness. Hermetic packing for the valve, characterized in that for forming a fluid passageway (130). The method of claim 1;
On the bottom and top surfaces of the lower packing 120 and the upper packing 122, a flat contact portion 125 is formed to be in close contact with the settling 120 and the packing gland 111, and the lower packing 120 is formed. The upper surface of the middle and the upper surface of the middle packing 121 is formed with a mountain-shaped protrusion 126, the lower surface of the middle patch 121 and the upper packing 122 is formed in the lower portion of the lower packing by forming a recessed portion (127) Middle packing 121 is seated at the position 120, and the upper packing 122 is seated on the middle packing 121 is sealed.
KR20100060640A 2010-06-25 2010-06-25 Packing for valve KR101197372B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR20100060640A KR101197372B1 (en) 2010-06-25 2010-06-25 Packing for valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR20100060640A KR101197372B1 (en) 2010-06-25 2010-06-25 Packing for valve

Publications (2)

Publication Number Publication Date
KR20120000326A true KR20120000326A (en) 2012-01-02
KR101197372B1 KR101197372B1 (en) 2012-11-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR20100060640A KR101197372B1 (en) 2010-06-25 2010-06-25 Packing for valve

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101895165B1 (en) * 2017-05-02 2018-09-04 두산중공업 주식회사 Steam leak-off apparatus and method of control valve for steam turbine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102181092B1 (en) 2020-03-20 2020-11-20 고기창 A leakage shut-off device of a fluid control valve

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5512619Y2 (en) * 1975-09-22 1980-03-19
US8132785B2 (en) * 2006-07-12 2012-03-13 Kitz Corporation Shaft seal packing and shaft seal structure for valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101895165B1 (en) * 2017-05-02 2018-09-04 두산중공업 주식회사 Steam leak-off apparatus and method of control valve for steam turbine

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Publication number Publication date
KR101197372B1 (en) 2012-11-09

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