CN201057285Y - Air isolation valve with safe casing - Google Patents
Air isolation valve with safe casing Download PDFInfo
- Publication number
- CN201057285Y CN201057285Y CNU2007201552279U CN200720155227U CN201057285Y CN 201057285 Y CN201057285 Y CN 201057285Y CN U2007201552279 U CNU2007201552279 U CN U2007201552279U CN 200720155227 U CN200720155227 U CN 200720155227U CN 201057285 Y CN201057285 Y CN 201057285Y
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- Prior art keywords
- valve
- valve body
- seal ring
- utility
- ring
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- Expired - Lifetime
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Abstract
The utility model belongs to a valve, in particular relates to an air isolation valve for safety shell that comprises a valve body, a valve stem positioned in the valve body, and a dish plate connected through a pin axle and the valve stem. The valve body is connected with an electric actuator through a bracket and a stud. A valve stem nut connected with the valve is arranged in the electric actuator. The valve stem and the vale body are sealed through filler. The bottom of the valve body is connected with a bottom cover. The bottom of the valve is connected with a cushion block. A seal ring is pressed on the dish plate through a chuck ring and a chuck ring bolt.1-4circumferential slots are positioned on the circumferential direction of the seal ring. The utility model has the advantages that the seal ring is simply processed but with good sealing effect. The utility model is applied to the inner and outer ducts of safety shell for closed penetration reactor in pressurized water reactor nuclear power plant to guarantee the safety of the system.
Description
Technical field
The utility model belongs to a kind of valve, is specifically related to a kind of containment air insulated valve.
Background technique
Containment air insulated valve is used for the airtight inside and outside air channel of running through containment vessel of PWR nuclear power plant, and the Safety function of executive system is cut off or the connection pipeline, thereby made system's true(-)running.When having an accident in the containment, containment air insulated valve can quick closedown, to prevent and to slow down after the accident escaping of radioactive material and steam and AIR MIXTURES in the containment.
Traditional containment air insulated valve adopts multiple layer metal therebetween flexible graphite structure.Multiple layer metal therebetween flexible graphite structure is to clamp a nonmetal seal ring with two seal joints, does sealing surface with nonmetallic ring.Its feature is to have utilized nonmetallic favorable elasticity, reaches the effect of zero leakage.But for guaranteeing positive confinement between seal ring layer by layer, just need use binding agent, but nuclear power valve has very high requirement and many restrictions to material therefor, and chlorine, fluorine, sulphur or the like ion concentration is had very tight requirement, the every index of binding agent is very difficult up to standard.Containment air insulated valve working life will be more than 40 years in addition, and service cycle takes 2 years.But not Wear Resistance of Metal Materials can be a little less than, through being difficult to reach sealing effect after the wearing and tearing of several times, in the service cycle wearing and tearing took place easily in 2 years and reveal again.In addition, the environmental working condition at million kilowatt nuclear power station is all harsher.As: temperature reaches 150 ℃.Usually soft sealing material all can not satisfy this requirement.Therefore need to adopt the seal ring of multi-layer metal structure to overcome above-mentioned defective.
Multi-layer metal structure is to be formed by connecting by welding or bolt etc. by seal ring being divided into multilayer.Do like this and both guaranteed that sealing surface has the strong crocking resistance of metallic seal, also took into account the elasticity of seal ring.But multi-layer metal structure processing and assembly technology complexity, each layer metal requires thinner, and the welding deformation problem is difficult to solve.Through the test of 2000 operating lifes, usually produce warping phenomenon between layer and the layer, warping phenomenon is meant double layer of metal because of stressed generation perk, the phenomenon peeled off, so uses multi-layer sealed circle to be difficult to satisfy the zero leakage requirement of containment air insulated valve.
Summary of the invention
The purpose of this utility model is to provide a kind of seal ring to process containment air insulated valve simple, good seal performance.
The utility model is achieved in that a kind of containment air insulated valve, it comprises valve body, be located at valve rod in the valve body and the dish plate that is connected with valve rod by bearing pin, valve body is connected with Electric actuator by support, double-screw bolt, be provided with the Stem Mut that is connected with valve rod in the Electric actuator, seal by filler between valve rod and the valve body, the bottom of valve body is connecting bottom cover, the bottom of valve rod is connecting cushion block, by pressure ring and junk ring bolt seal ring is pressed on the dish plate, has 1～4 circumferential groove at the hoop of seal ring.
The utility model has 1～4 circumferential groove by the hoop of seal ring, formed the sealing of a plurality of sealing surfaces, the circumferential groove easy processing, overcome the defective of multiple layer metal sealing configuration processed complex, and, can obey the warping phenomenon that multiple layer metal mechanism is easy to generate because seal ring is structure as a whole, improve sealability, therefore, the utility model has the advantages that: simple, the good sealing effect of seal ring processing.
Description of drawings
Fig. 1 is the plan view of the utility model containment air insulated valve;
Fig. 2 is the left view of the utility model containment air insulated valve;
Fig. 3 is the sectional drawing of elastic seal ring of the present utility model.
Among the figure, 1 bottom cover, 2 pads, 3 valve bodies, 4 seal rings, 5 pressure rings, 6 junk ring bolts, 7 dish plates, 8 valve rods, 9 bearing pins, 10 fillers, 11 double-screw bolts, 12 supports, 13 Stem Muts, 14 keys, 15 Electric actuators, 17 hold-down grids, 18 filler glands.
Embodiment
Shown in Fig. 1～2, containment air insulated valve is made up of valve body 3, dish plate 7, seal ring 4, pressure ring 5, pad 2, valve rod 8, filler 10, junk ring bolt 6, bottom cover 1, support 12, Stem Mut 13, Electric actuator 15 etc.Bottom cover 1 is threaded with the bottom of valve body 3, and cushion block 2 is by the bottom of the valve rod 8 that is being threaded, and valve rod 8 is located in the valve body and by bearing pin 9 and is connected with dish plate 7; Seal ring 4 presses 6 to be pressed on the dish plate 7 by pressure ring 5 and junk ring bolt.Valve body 3 is fixedlyed connected with Electric actuator 15 by support 12, double-screw bolt 11, is provided with Stem Mut 13 in the Electric actuator 15, and Stem Mut 13 is connected with valve rod 8 by key 14.Seal by filler 10 between valve rod 8 and the valve body 3.Filler 10 is fixed on the valve body 3 with double-screw bolt 11 by filler gland 18, hold-down grid 17.The radial cross section of seal ring is not proper circle but ellipse, and as shown in Figure 3, the sealing surface shape is asymmetric, favour the body center line on one side, another side then is parallel to the body center line, adopts the structure of this off-centre fundamentally to change seal construction, no longer be position seals, but the torsion sealing.Seal ring adopts metallic material, has 1～4 circumferential groove at the hoop of seal ring.The circumferential groove of present embodiment is 1, and its sectional shape is " U " type, and the both sides of each circumferential groove form sealing respectively, and n circumferential groove arranged, and just forms the sealing of n+1 road.
The signal of valve open is sent in the control room, and Electric actuator 15 starts, Stem Mut 13 rotations, and valve rod 8 and dish plate 7 and then rotate, so the rotation of Stem Mut 13 is converted to the motion of dish plate 7 and seal ring 4, thereby realize opening or closing valve.Also can utilize the handwheel on the Electric actuator to open or close valve.
The utility model is used for the airtight inside and outside air channel of running through containment vessel of PWR nuclear power plant, the Safety function of executive system.
Claims (1)
1. containment air insulated valve, it comprises valve body (3), the dish plate (7) that is located at the valve rod (8) in the valve body (3) and is connected with valve rod (8) by bearing pin (9), valve body (3) is by support (12), double-screw bolt (11) is connected with Electric actuator (15), be provided with the Stem Mut (13) that is connected with valve rod (8) in the Electric actuator (15), seal by filler (10) between valve rod (8) and the valve body (3), the bottom of valve body (3) is connecting bottom cover (1), the bottom of valve rod (8) is connecting cushion block (2), by pressure ring (5) and junk ring bolt (6) seal ring (4) is pressed on the dish plate (7), it is characterized in that: the hoop at described seal ring (4) has 1～4 circumferential groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201552279U CN201057285Y (en) | 2007-07-12 | 2007-07-12 | Air isolation valve with safe casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201552279U CN201057285Y (en) | 2007-07-12 | 2007-07-12 | Air isolation valve with safe casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201057285Y true CN201057285Y (en) | 2008-05-07 |
Family
ID=39426127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201552279U Expired - Lifetime CN201057285Y (en) | 2007-07-12 | 2007-07-12 | Air isolation valve with safe casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201057285Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109564787A (en) * | 2016-12-29 | 2019-04-02 | 原子能技术科学研究设计院股份公司 | The sealing inner casing shielding system of npp safety shell |
-
2007
- 2007-07-12 CN CNU2007201552279U patent/CN201057285Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109564787A (en) * | 2016-12-29 | 2019-04-02 | 原子能技术科学研究设计院股份公司 | The sealing inner casing shielding system of npp safety shell |
| CN109564787B (en) * | 2016-12-29 | 2023-05-16 | 原子能技术科学研究设计院股份公司 | Sealed inner shell isolation system of nuclear power plant containment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080507 |
|
| CX01 | Expiry of patent term |