CN102588620A - Stop valve with valve seat provided with protective sleeve - Google Patents

Stop valve with valve seat provided with protective sleeve Download PDF

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Publication number
CN102588620A
CN102588620A CN2012100762129A CN201210076212A CN102588620A CN 102588620 A CN102588620 A CN 102588620A CN 2012100762129 A CN2012100762129 A CN 2012100762129A CN 201210076212 A CN201210076212 A CN 201210076212A CN 102588620 A CN102588620 A CN 102588620A
Authority
CN
China
Prior art keywords
valve
valve seat
sheathed casing
protective sleeve
seat
Prior art date
Application number
CN2012100762129A
Other languages
Chinese (zh)
Inventor
宣伯民
Original Assignee
宣伯民
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 宣伯民 filed Critical 宣伯民
Priority to CN2012100762129A priority Critical patent/CN102588620A/en
Publication of CN102588620A publication Critical patent/CN102588620A/en

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Abstract

The invention discloses a stop valve with a valve seat provided with a protective sleeve, belonging to the technical field of the structure of the stop valve and aiming to solve the problems of the influence on the closing tightness due to the fact that the sealing surface of the valve seat of existing stop valve is easy to have defect in the scouring of fluid. The stop valve comprises a valve body, a valve seat and a valve plate. A protective sleeve is arranged on the inner ring of the valve seat; the lower end of the protective sleeve is connected with an elastic bearing mechanism. The protective sleeve moves upwards when the valve plate is opened, the upper end face of the protective sleeve is higher than the sealing surface of the valve seat; the upper end face of the protective sleeve clings to the lower surface of the valve plate to move downwards together with the valve plate when the valve plate is closed. The stop valve with the valve seat provided with the protective sleeve is applied to the stop valve with a planar valve plate.

Description

Valve seat is provided with the stop valve of sheathed casing

Technical field

The present invention relates to a kind of structure technology of stop valve, particularly relate to the stop valve that a kind of valve seat is provided with sheathed casing.

Background technique

Owing to the favorable sealing property of stop valve, can be used for the occasion of accurate control flow rate; When opening, valve plate receives the promotion of hydrodynamic pressure, can operate like a cork fast; Therefore, be widely used on the gas pipings such as steam, pressurized air, rock gas, refrigeration and vacuum, also can be used on the liquid lines such as oil transportation, water delivery.Internal structure from stop valve; When valve open to use; The most of sealing surface of valve seat all is to receive washing away of flowing medium; And at the flow through position of sealing surface of seat of fluid, just fluid flow to the place that the strong variation of brush takes place fluidised form, fluid to the scouring force of sealing surface of seat can be unusual powerful.The fluid that particularly ought flow through is a high temperature and high speed, perhaps or even have corrosivity, contain solid particulate matter impurity; Then the suffered scouring force of the sealing surface of valve seat can make it that serious corrosion and abrasion phenomenon take place.What show sealing surface of seat is: defectives such as pit, groove, cut and breach appear in surface very soon; Cause can't close between valve plate and the valve seat tight; Causing valve evaporating, emitting, dripping or leaking of liquid or gas phenomenon, particularly valve plate to occur is plate stop valve, more is prone to produce this phenomenon.And for stop valve; The leakproofness of closing is one of its very important performance index, as long as the defective of the influential slightly seal of sealing surface of valve seat occurs, just must overhaul; Sometimes have to scrap whole valve, spent human and material resources, financial resources are very big.

Summary of the invention

The purpose of this invention is to provide the stop valve that a kind of valve seat is provided with sheathed casing, the sealing surface of seat that overcomes present stop valve is produced defective by fluid scouring easily, and the deficiency of leakproofness is closed in influence.

The present invention is achieved through following technical proposals.

The present invention includes valve body, valve seat, valve plate, at the inner ring of said valve seat sheathed casing is housed, the lower end of said sheathed casing is connected with elastic bearing mechanism; When said valve plate is opened, the sealing surface that said sheathed casing moves, its upper-end surface is higher than said valve seat, when said valve plate was closed, the upper-end surface of said sheathed casing was affixed on the following of said valve plate and moves down together.In the design; Because said sheathed casing can fluctuate in the inner ring of said valve seat; In case said valve plate is opened; Said sheathed casing can raise immediately and block the sealing surface of said valve seat, is folded to the outlet of valve after fluid flows out from the endoporus of said sheathed casing through the upper-end surface of said sheathed casing, no longer directly washes away the sealing surface of said valve seat.When said valve plate was closed, said sheathed casing can move down, and can not influence the leakproofness of closing between itself and the said valve seat.

Said sheathed casing must the inner ring flexibility and reliability of said valve seat move up and down; Said elastic bearing mechanism for its lower end; Preferred two kinds of the present invention, that is: said elastic bearing mechanism is that a spring, its top are connected with the lower end of said sheathed casing, its following fixedly being loaded on the said valve body; Or said elastic bearing mechanism is at least two elastic rods, and end of each said elastic rod is connected with the lower end of said sheathed casing, and the other end fixedly is loaded on the said valve body.

The said valve body of a lot of stop valves is cast, a sealing surface process cutting to said valve seat, and the inner ring of said valve seat is without cutting; More coarse; Can influence the moving up and down of said sheathed casing, therefore, between the inner ring of said valve seat and said sheathed casing, fixed sleeving is housed; The inner ring of said fixed sleeving and said valve seat is the sealing surface that is fixedly connected, its upper-end surface is lower than said valve seat, and said sheathed casing can move up and down in said fixed sleeving actively.

Against existing technologies, the invention has the beneficial effects as follows:

Can protect the seat of stop valve sealing surface effectively, exempt from directly washing away of fluid and produce and to close tight defective; Prolonged the working life of stop valve.

Description of drawings

Fig. 1 is the embodiment's of spring a structural representation for said elastic bearing mechanism, and Fig. 2 is the embodiment's of two elastic rods a structural representation for said elastic bearing mechanism.Among the figure: 1, valve body, 2, valve seat, 3, valve plate, 4, sheathed casing, 5, spring, 6, elastic rod, 7, fixed sleeving.

Embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is done further description.

Because parts that the present invention set up will will be worked being immersed under the situation of fluid with valve plate 3 parts such as grade, so performances such as its heatproof, anti-corrosion and rigidity should adapt.Between the inner ring of fixed sleeving 7 and valve seat 2 be connected available welding or bonding mode realizes, must be solid and reliable.Being connected of said spring 5, elastic rod 6 and valve body, should adopt to be spirally connected, because sheathed casing 4, spring 5 and elastic rod 6 are more fragile, can be convenient to change.According to illustrated in figures 1 and 2, when valve plate 3 was opened, sheathed casing 4 raise under the supporting of spring 5 or elastic rod 6 and blocks the sealing surface of valve seat 2, and fluid is walked around the sealing surface of valve seat 2 to the valve export diffluence behind the endoporus that flows through sheathed casing 4.Close in the closed procedures at valve plate 3, when the sealing surface gap of itself and valve seat 2 is very little, the fluid through this gap apace moment wash away sealing surface, this is good, and can wash away the impurity that sealing surface is detained, make close between valve plate 3 and the valve seat 2 tight.

Claims (4)

1. a valve seat is provided with the stop valve of sheathed casing, comprises valve body, valve seat, valve plate, it is characterized in that, at the inner ring of said valve seat sheathed casing is housed, and the lower end of said sheathed casing is connected with elastic bearing mechanism; When said valve plate is opened, the sealing surface that said sheathed casing moves, its upper-end surface is higher than said valve seat, when said valve plate was closed, the upper-end surface of said sheathed casing was affixed on the following of said valve plate and moves down together.
2. a kind of valve seat according to claim 1 is provided with the stop valve of sheathed casing, it is characterized in that, said elastic bearing mechanism is that a spring, its top are connected with the lower end of said sheathed casing, its following fixedly being loaded on the said valve body.
3. a kind of valve seat according to claim 1 is provided with the stop valve of sheathed casing; It is characterized in that; Said elastic bearing mechanism is at least two elastic rods, and an end of each said elastic rod is connected with the lower end of said sheathed casing, and the other end fixedly is loaded on the said valve body.
4. a kind of valve seat according to claim 1 is provided with the stop valve of sheathed casing; It is characterized in that; Between the inner ring of said valve seat and said sheathed casing, fixed sleeving is housed; The inner ring of said fixed sleeving and said valve seat is the sealing surface that is fixedly connected, its upper-end surface is lower than said valve seat, and said sheathed casing can move up and down in said fixed sleeving actively.
CN2012100762129A 2012-03-19 2012-03-19 Stop valve with valve seat provided with protective sleeve CN102588620A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012100762129A CN102588620A (en) 2012-03-19 2012-03-19 Stop valve with valve seat provided with protective sleeve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012100762129A CN102588620A (en) 2012-03-19 2012-03-19 Stop valve with valve seat provided with protective sleeve

Publications (1)

Publication Number Publication Date
CN102588620A true CN102588620A (en) 2012-07-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012100762129A CN102588620A (en) 2012-03-19 2012-03-19 Stop valve with valve seat provided with protective sleeve

Country Status (1)

Country Link
CN (1) CN102588620A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104763817A (en) * 2015-03-20 2015-07-08 苏州福润机械有限公司 Spring pressing type valve seat for stop valve
CN109307089A (en) * 2018-10-22 2019-02-05 合肥通用机械研究院有限公司 High frequency opens check-valves fastly
CN109469753A (en) * 2018-12-07 2019-03-15 四川格林流体控制设备有限公司 A kind of safe bottom valve of LNG peculiar to vessel
CN109723877A (en) * 2017-10-27 2019-05-07 浙江三花制冷集团有限公司 A kind of motor-driven valve
CN109723831A (en) * 2017-10-27 2019-05-07 浙江三花制冷集团有限公司 A kind of motor-driven valve and its manufacturing method
CN109723826A (en) * 2017-10-27 2019-05-07 浙江三花制冷集团有限公司 A kind of motor-driven valve

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104763817A (en) * 2015-03-20 2015-07-08 苏州福润机械有限公司 Spring pressing type valve seat for stop valve
CN109723877A (en) * 2017-10-27 2019-05-07 浙江三花制冷集团有限公司 A kind of motor-driven valve
CN109723831A (en) * 2017-10-27 2019-05-07 浙江三花制冷集团有限公司 A kind of motor-driven valve and its manufacturing method
CN109723826A (en) * 2017-10-27 2019-05-07 浙江三花制冷集团有限公司 A kind of motor-driven valve
CN109307089A (en) * 2018-10-22 2019-02-05 合肥通用机械研究院有限公司 High frequency opens check-valves fastly
CN109469753A (en) * 2018-12-07 2019-03-15 四川格林流体控制设备有限公司 A kind of safe bottom valve of LNG peculiar to vessel

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Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20120718

C02 Deemed withdrawal of patent application after publication (patent law 2001)