CN110094534B - Spring compensation type movable valve seat plug valve - Google Patents

Spring compensation type movable valve seat plug valve Download PDF

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Publication number
CN110094534B
CN110094534B CN201910365965.3A CN201910365965A CN110094534B CN 110094534 B CN110094534 B CN 110094534B CN 201910365965 A CN201910365965 A CN 201910365965A CN 110094534 B CN110094534 B CN 110094534B
Authority
CN
China
Prior art keywords
valve
valve seat
cock
sealing
shaped ring
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
CN201910365965.3A
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Chinese (zh)
Other versions
CN110094534A (en
Inventor
赵宇
徐娇
李茂元
胡海鸥
王迪
于江宁
李红梅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Harbin Power Plant Valve Co ltd
Original Assignee
Harbin Power Plant Valve Co ltd
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.)
Filing date
Publication date
Application filed by Harbin Power Plant Valve Co ltd filed Critical Harbin Power Plant Valve Co ltd
Priority to CN201910365965.3A priority Critical patent/CN110094534B/en
Publication of CN110094534A publication Critical patent/CN110094534A/en
Application granted granted Critical
Publication of CN110094534B publication Critical patent/CN110094534B/en
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Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/04—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor
    • F16K5/0457—Packings
    • F16K5/0464—Packings in the housing
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/04—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor
    • F16K5/0457—Packings
    • F16K5/0485—Spindle 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
    • F16K5/18—Special arrangements for separating the sealing faces or for pressing them together for plugs with cylindrical surfaces

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

Abstract

The invention relates to a spring compensation type movable valve seat plug valve which is mainly used for a fluid medium conveying pipeline. The valve mainly comprises a valve body, a cock, a spring washer, a valve seat, an upper valve cover, a lower valve cover, an O-shaped ring for sealing and other parts. The valve actuating mechanism is connected to the upper part of the cock, the cock is provided with a through hole, the valve seat is arranged on the cock, and the actuating mechanism drives the cock and the valve seat on the cock to rotate in the valve body. The valve seat and the inner wall surface of the valve body form a sealing pair, and the circulation channel is opened or closed by rotation. The valve can effectively ensure the close fitting of the sealing pair through the compensation force of the spring, and improves the tightness. The back of the valve seat is designed to be communicated with the medium through the flow hole, and the pressure receiving area of the back of the valve seat is larger than the area of the sealing surface through the asymmetric structure of the pressure receiving area of the back of the valve seat, so that a certain pressure difference can be generated between the sealing surface of the valve seat and the back of the valve seat during working, the back of the valve seat is larger than the side pressure of the sealing surface, and the higher the pressure of the medium is, the better the tightness is.

Description

Spring compensation type movable valve seat plug valve
Technical Field
The invention relates to a spring compensation type movable valve seat plug valve, which is a quick switch type straight-through valve, and is mainly used as an opening and closing device on medium conveying pipelines in industries of thermal power, nuclear power, petrochemical industry, natural gas, heating ventilation and the like.
Background
The existing plug valve generally adopts a conical plug hard sealing mechanism, a sealing pair is generally of a fixed structure, and sealing surfaces cannot be well matched together to cause valve leakage due to abrasion after the temperature of the valve changes or works for a period of time; meanwhile, when the medium contains suspended particles, the blocking event can be caused by the fact that the sealing pairs cannot be well regulated; in addition, the leakage of the valve can be caused by insufficient specific sealing pressure during high-pressure operation. The spring compensation type movable valve seat plug valve disclosed by the invention well solves the problems of the plug valve in working.
Disclosure of Invention
The invention aims to design a spring compensation type movable valve seat plug valve, which effectively solves the problems of compensation of valve sealing force and high-pressure leakage.
The invention provides a spring compensation type movable valve seat plug valve, which mainly comprises a lower valve cover (1), a valve cover sealing O-shaped ring (2), a valve body (3), a butterfly spring (4), a plug (5), a valve seat (6), a valve seat sealing O-shaped ring (7), an upper valve cover (8), an actuating mechanism (9) and a plug sealing O-shaped ring (10). The method is characterized in that: the valve seat (6) is arranged in the cock (5) and is sealed by a valve seat sealing O-shaped ring (7), the back of the valve seat (6) is provided with a butterfly spring (4) group for pressure compensation, meanwhile, the back of the valve seat (6) is designed to be communicated with a medium through a flow hole, the pressure area of the back of the valve seat (6) is larger than the area of the sealing surface through an asymmetric structure of the pressure area of the back of the valve seat, a certain pressure difference is generated between the sealing surface of the valve seat and the back of the valve seat during operation, the back of the valve seat is larger than the side pressure of the sealing surface, the higher the pressure of the medium is, the better the tightness is, the components are arranged in the valve body together, and the sealing surface of the valve seat (6) and the wall surface of the inner cavity of the valve body are sealed; the upper valve cover (8) and the lower valve cover (1) are connected with the valve body (3) through bolts to position internal components such as the cock (5), and are sealed through the valve cover sealing O-shaped ring (2) and the cock sealing O-shaped ring (10); the actuating mechanism (9) is connected with the upper part of the cock (5) through a square matched shaft hole, the rotation of the actuating mechanism (9) directly drives the cock (5) and the valve seat and other parts to rotate in the valve body, the cock (5) is provided with a through hole with the same diameter as a valve body channel, the 90-degree direction of the through hole is provided with double-side valve seats, and the valve is alternately opened and closed through the rotation of the cock (5).
The beneficial effects of the invention are as follows: the compression butterfly spring component in the spring compensation type movable valve seat generates spring force as compensation force, so that the tight fit between the valve seat and the sealing pair on the inner cavity wall surface of the valve body is effectively ensured; through the structure that the back surface of the valve seat is communicated with the medium and the pressure area of the back surface of the valve seat and the pressure area of the sealing surface are asymmetric, the leakage problem of the valve under high pressure difference is effectively solved.
Drawings
FIG. 1 shows a spring-compensated plug valve with a movable valve seat
In the figure, the valve cover comprises a lower valve cover 1, a valve cover sealing O-shaped ring 2, a valve body 3, a butterfly spring 4, a cock 5, a valve seat 6, a valve seat 7, a valve seat sealing O-shaped ring 8, an upper valve cover 9, an actuating mechanism 10 and a cock sealing O-shaped ring
FIG. 2 is an enlarged view of a sealing pair of a plug valve
In the figure, the valve cover is 1, the valve cover seals the O-shaped ring 2, the valve body 3, the butterfly spring 4, the cock 5, the valve seat 6, the valve seat 7, the valve seat seals the O-shaped ring 8 and the upper valve cover
Detailed Description
In the embodiment shown in figure 1 of the drawings,
The valve is welded or otherwise mounted to the pipe. When the valve is opened, the rotary actuating mechanism moves, the actuating mechanism drives the cock to rotate, and when the through hole on the cock is communicated with the valve body channel, the valve is opened, and medium flows; when the valve seat on the cock rotates to the same axis with the valve body channel, the sealing surface of the valve seat and the wall surface of the inner cavity of the valve body form a closed sealing pair, the valve is closed, and medium circulation is blocked.

Claims (1)

1. A spring compensation type movable valve seat plug valve is characterized in that: the valve mainly comprises a lower valve cover (1), a valve cover sealing O-shaped ring (2), a valve body (3), a butterfly spring (4), a cock (5), a valve seat (6), a valve seat sealing O-shaped ring (7), an upper valve cover (8), an actuating mechanism (9) and a cock sealing O-shaped ring (10); the valve seat (6) is arranged in the cock (5) and is sealed by a valve seat sealing O-shaped ring (7), a butterfly spring (4) group is arranged on the back of the valve seat (6) to perform pressure compensation, so that the tight fit between the valve seat and a sealing pair of the inner cavity wall surface of the valve body is effectively ensured, meanwhile, the valve seat (6) is designed to be that the back is communicated with a medium through a flow hole, the pressure bearing area of the back of the valve seat is larger than the area of the sealing surface through an asymmetric structure of the pressure bearing area of the back of the valve seat and the sealing surface, a certain pressure difference is generated between the sealing surface of the valve seat and the back of the valve seat during operation, the higher the sealing performance of the medium is, the better the higher the sealing performance of the medium is, the components are arranged in the valve body together, and the sealing surface of the valve seat (6) and the inner cavity wall surface of the valve body are sealed; the upper valve cover (8) and the lower valve cover (1) are connected with the valve body (3) through bolts to position internal components of the cock (5), and are sealed through the valve cover sealing O-shaped ring (2) and the cock sealing O-shaped ring (10); the actuating mechanism (9) is connected with the upper part of the cock (5) through a square matched shaft hole, the rotation of the actuating mechanism (9) directly drives the cock (5) and the valve seat to rotate in the valve body, the cock (5) is provided with a through hole with the same diameter as a valve body channel, the 90-degree direction of the through hole is provided with double-side valve seats, and the valve is alternately opened and closed through the rotation of the cock (5).
CN201910365965.3A 2019-04-24 2019-04-24 Spring compensation type movable valve seat plug valve Active CN110094534B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910365965.3A CN110094534B (en) 2019-04-24 2019-04-24 Spring compensation type movable valve seat plug valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910365965.3A CN110094534B (en) 2019-04-24 2019-04-24 Spring compensation type movable valve seat plug valve

Publications (2)

Publication Number Publication Date
CN110094534A CN110094534A (en) 2019-08-06
CN110094534B true CN110094534B (en) 2024-04-30

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ID=67446720

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910365965.3A Active CN110094534B (en) 2019-04-24 2019-04-24 Spring compensation type movable valve seat plug valve

Country Status (1)

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115492962A (en) * 2021-06-17 2022-12-20 浙江盾安机械有限公司 Four-way valve and air conditioning system with same

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3136867A1 (en) * 1981-09-17 1983-04-07 Armaturenfabrik und Metallgießerei Koch und Müller GmbH, 4250 Bottrop Shut-off element for gas conduits
BE1012943A4 (en) * 1999-10-22 2001-06-05 Belgeonne Richard Industrial valve of the full flow tapered plug valve type
CN2931966Y (en) * 2006-05-08 2007-08-08 苏林波 Faucet type valve
CN101672377A (en) * 2009-09-28 2010-03-17 江苏亿丰机械制造有限公司 automatic compensation sealing plug valve
CN101672376A (en) * 2009-09-28 2010-03-17 江苏亿丰机械制造有限公司 Cock type mud valve
CN203906858U (en) * 2014-04-08 2014-10-29 南京自控仪表有限公司 Metal valve seat sealing ball valve with improved structure
CN208719435U (en) * 2018-05-03 2019-04-09 苏州纽威阀门股份有限公司 A kind of sealing structure and non-return valve of non-return valve
CN210218749U (en) * 2019-04-24 2020-03-31 哈电集团哈尔滨电站阀门有限公司 Spring compensation type plug valve with movable valve seat

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3136867A1 (en) * 1981-09-17 1983-04-07 Armaturenfabrik und Metallgießerei Koch und Müller GmbH, 4250 Bottrop Shut-off element for gas conduits
BE1012943A4 (en) * 1999-10-22 2001-06-05 Belgeonne Richard Industrial valve of the full flow tapered plug valve type
CN2931966Y (en) * 2006-05-08 2007-08-08 苏林波 Faucet type valve
CN101672377A (en) * 2009-09-28 2010-03-17 江苏亿丰机械制造有限公司 automatic compensation sealing plug valve
CN101672376A (en) * 2009-09-28 2010-03-17 江苏亿丰机械制造有限公司 Cock type mud valve
CN203906858U (en) * 2014-04-08 2014-10-29 南京自控仪表有限公司 Metal valve seat sealing ball valve with improved structure
CN208719435U (en) * 2018-05-03 2019-04-09 苏州纽威阀门股份有限公司 A kind of sealing structure and non-return valve of non-return valve
CN210218749U (en) * 2019-04-24 2020-03-31 哈电集团哈尔滨电站阀门有限公司 Spring compensation type plug valve with movable valve seat

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Address after: 150046 No. 1, mat street, Xiangfang District, Heilongjiang, Harbin

Applicant after: HARBIN POWER PLANT VALVE Co.,Ltd.

Address before: Hanan Hanan Industrial Park core area three road 150066 Heilongjiang city of Harbin province No. 6

Applicant before: HARBIN POWER PLANT VALVE Co.,Ltd.

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