CN202646874U - Exhaustion valve for nuclear power water system - Google Patents
Exhaustion valve for nuclear power water system Download PDFInfo
- Publication number
- CN202646874U CN202646874U CN 201220176270 CN201220176270U CN202646874U CN 202646874 U CN202646874 U CN 202646874U CN 201220176270 CN201220176270 CN 201220176270 CN 201220176270 U CN201220176270 U CN 201220176270U CN 202646874 U CN202646874 U CN 202646874U
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- China
- Prior art keywords
- valve
- buoy
- sealing
- nuclear power
- exhaustion
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- 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.)
- Expired - Lifetime
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- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Abstract
The utility model relates to an exhaustion valve for a nuclear power water system. The exhaustion valve is characterized in that a buoy is arranged in a valve body; a buoy limiting device is embedded on a valve cover; a first sealing ring and a second sealing ring are arranged under the valve cover; and a protecting cover is arranged above the valve cover. When pressure water flow in the system is injected into the valve body, the size of the buoy body is large, so that the buoy stably and rapidly floats upwards along a sliding bearing sleeve by virtue of buoyancy of liquid; the upper plane of the buoy and the sealing rings of the valve cover are sealed in a press fit mode to finish an action of exhaustion and water stop; because of large buoyancy, required sealing pressure is low, and the low-pressure sealing effect is guaranteed; and when water is stopped in a pipeline or the pipeline is in a negative pressure state, the buoy quickly descends along the sliding bearing sleeve, and external air is guided into the buoy so as to protect the safety of the pipeline. Because of a buoy-type large plane sealing structure, the defects of small exhaustion amount of the common exhaustion valve, small buoyancy, slow rising speed, no-tight low pressure sealing and easiness for deformation of a floating ball are overcome.
Description
Technical field
The utility model relates to the technical field of pipeline valve, specifically a kind of intake and exhaust valve for nuclear power water system.
Background technique
At present existing most of outlet valves adopt the stainless steel floating ball structure, there is following defective in this structure: the distortion of (1) floating ball body, under the pipeline medium High Pressure, ball float deforms easily, cause and carried out when next time, sealing was moved, the sealing station displacement, sealing surface is poorly sealed, and pipeline medium leaks outside; (2) the ball float position is difficult to accurately fixingly, and in come-up or sinking process, the ball float position swings, and causes initial sealing moment, and pipeline water flow is excessive; (3) the ball float volume is little, and quality is light, and buoyancy is little, causes the air closing pressure little, and the low-pressure water sealing effect is poor, not the impact of compression resistance water.
Summary of the invention
The purpose of this utility model is to provide a kind of improved outlet valve for nuclear power water system, and it can overcome floating ball body distortion in the prior art, the location is inaccurate, the air closing pressure is little and the some shortcomings of low pressure seal weak effect.
To achieve these goals; the technical solution of the utility model is: a kind of outlet valve for nuclear power water system; it mainly comprises valve body and valve gap; it is characterized in that: be provided with floating drum in the valve body; be embedded with the floating drum limit stoper on the valve gap; the valve gap below is provided with the first seal ring and the second seal ring, and the valve gap top is provided with safety cover.
During work, if system pipeline begins water-filling, this moment floating drum because the position-limiting action of position limit pin is positioned at the lower position of valve body, a large amount of exhausts of pipeline, owing to floating drum relative mass is large, gas inside and outside differential pressure deficiency is so that floating drum produces up action.After system's internal pressure current inject valve body, because the volume of cylindrical shell is larger, buoyancy by means of liquid, floating drum along sliding bearing sleeve steadily, promptly the come-up, plane and valve bonnet seal circle pressing sealing are finished the action that exhaust blocks water, because buoyancy is large on the final floating drum, so the sealing load that needs is lower, has guaranteed the low pressure seal effect.When pipeline is cut off the water or when being in negative pressure, floating drum descends rapidly along sliding bearing sleeve, imports ambient air, protection pipeline safety.The large plane sealing structure of its floating-tube type, it is little to have overcome common outlet valve air displacement, and buoyancy is little, and the rate of climb is slow, and low pressure seal is not tight, and the yielding shortcoming of ball float.
Description of drawings
Fig. 1 is the utility model one embodiment's structural representation.
Embodiment
The utility model will be further described below in conjunction with drawings and Examples.
Each label is expressed as follows in the accompanying drawing: 1, valve body 2, valve gap 3, floating drum 4, seal ring 5, sliding bearing sleeve 6, valve bonnet 7, position limit pin 8-10, stud nut bolt 11 cover type nuts 12, O type circle 13, pressure measurement interface.
The utility model mainly comprises valve body and valve gap, and its difference with the prior art is: be provided with floating drum in the valve body, be embedded with the floating drum limit stoper on the valve gap, the valve gap below is provided with the first seal ring and the second seal ring, and the valve gap top is provided with safety cover.Described floating drum limit stoper is by sliding bearing sleeve and be located at the stainless steel position limit pin that sliding bearing puts and consist of, the below of valve gap is provided with groove, be provided with the first seal ring in the groove, described the first seal ring is the EPT rubber packing circle, and described EPT rubber packing circle is provided with multiple-sealed ring.Be provided with the second seal ring between valve gap and the valve body, described the second seal ring is the O RunddichtringO.Described safety cover is the stainless steel protection cover, cooperates by stainless steel strut and cover type nut between safety cover and the valve gap to link to each other.Valve body is provided with the pressure measurement interface.
1 is provided with stainless steel floating drum 3 in the valve body; inlay on the valve gap 2 without cunning moving axis bearing sleeve 5; floating drum 3 axis of guides are provided with stainless steel position limit pin 7; valve gap 2 lower recess are placed EPDM seal ring 4; form sealing pair with floating drum 3 finish surfaces; valve body 1 is connected into one with valve gap 2 by bolt, nut and double- screw bolt 8,9,10, and stainless steel strut and cover type nut 8-11, the stainless steel protection cover 6 of support valve closure 2 tops are installed on the valve gap 2.The valve gap bottom is provided with the pressure measurement interface, makes things convenient for Pressure testing.
In implementation process, if system pipeline begins water-filling, floating drum 3 is because the position-limiting action of position limit pin 7 is positioned at the lower position of valve body 1 at this moment, and this moment, pipeline was through a large amount of exhausts of valve gap 2 relief openings.After WATER AS FLOW MEDIUM in the system flows into valve body 1, floating drum 3 along sliding bearing sleeve 5 steadily, come-up promptly, the requirement of a large amount of exhausts of pipeline has been finished in plane and the 4 linear pressings of valve bonnet seal circle on the final floating drum 3.When pipeline is cut off the water or when being in negative pressure, floating drum 3 descends rapidly along sliding bearing sleeve 5, and ambient air is filled to pipeline, and the protection pipeline is not because of the effect failure by rupture of negative pressure.
In implementation process, the steady up-downgoing of floating drum 3 has benefited from the good leading role of sliding bearing sleeve 5, and sliding bearing sleeve 5 is that composite material system forms, and has that friction factor is little, wear-resisting, corrosion resistance is good, the advantage of oil-free lubrication; Floating drum 3 axis of guides also pass through precision machining, and degree of finish is higher.
In implementation process, the low pressure seal of floating drum 3 is that the low pressure effect can guarantee sealing because the volume of floating drum 3 is larger, and buoyancy is large; And seal ring 4 has multiple-sealed ring, linear contact, and seal pressure is large, and sealing effect is good.
Claims (5)
1. outlet valve that is used for nuclear power water system, it mainly comprises valve body and valve gap, it is characterized in that: be provided with floating drum in the valve body, be embedded with the floating drum limit stoper on the valve gap, the valve gap below is provided with the first seal ring and the second seal ring, and the valve gap top is provided with safety cover.
2. a kind of outlet valve for nuclear power water system according to claim 1, it is characterized in that: described floating drum limit stoper is by sliding bearing sleeve and be located at the stainless steel position limit pin that sliding bearing puts and consist of, the below of valve gap is provided with groove, be provided with the first seal ring in the groove, described the first seal ring is the EPT rubber packing circle, and described EPT rubber packing circle is provided with multiple-sealed ring.
3. a kind of outlet valve for nuclear power water system according to claim 1, it is characterized in that: be provided with the second seal ring between valve gap and the valve body, described the second seal ring is the O RunddichtringO.
4. a kind of outlet valve for nuclear power water system according to claim 1, it is characterized in that: described safety cover is the stainless steel protection cover, cooperates by stainless steel strut and cover type nut between safety cover and the valve gap to link to each other.
5. a kind of outlet valve for nuclear power water system according to claim 1, it is characterized in that: valve body is provided with the pressure measurement interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220176270 CN202646874U (en) | 2012-04-24 | 2012-04-24 | Exhaustion valve for nuclear power water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220176270 CN202646874U (en) | 2012-04-24 | 2012-04-24 | Exhaustion valve for nuclear power water system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202646874U true CN202646874U (en) | 2013-01-02 |
Family
ID=47415983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220176270 Expired - Lifetime CN202646874U (en) | 2012-04-24 | 2012-04-24 | Exhaustion valve for nuclear power water system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202646874U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104197069A (en) * | 2014-09-05 | 2014-12-10 | 陈巧琴 | Valve with valve deck protector |
| CN108561617A (en) * | 2018-05-23 | 2018-09-21 | 青岛双瑞海洋环境工程股份有限公司 | The float-type steam-water separation valve for the failure phenomenon that builds the pressure can be overcome |
-
2012
- 2012-04-24 CN CN 201220176270 patent/CN202646874U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104197069A (en) * | 2014-09-05 | 2014-12-10 | 陈巧琴 | Valve with valve deck protector |
| CN108561617A (en) * | 2018-05-23 | 2018-09-21 | 青岛双瑞海洋环境工程股份有限公司 | The float-type steam-water separation valve for the failure phenomenon that builds the pressure can be overcome |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 201799 No. 199 Qing Road, Shanghai Industrial Zone, Qingpu Patentee after: Shanghai aiweike valve Limited by Share Ltd Address before: 201706 Shanghai city Qingpu district Song Ying Road No. 1205 Patentee before: Shanghai Aiweike Valve Manufacturing Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |