CN200961733Y - Three-eccentric slanting plate type check valve - Google Patents
Three-eccentric slanting plate type check valve Download PDFInfo
- Publication number
- CN200961733Y CN200961733Y CN 200620135935 CN200620135935U CN200961733Y CN 200961733 Y CN200961733 Y CN 200961733Y CN 200620135935 CN200620135935 CN 200620135935 CN 200620135935 U CN200620135935 U CN 200620135935U CN 200961733 Y CN200961733 Y CN 200961733Y
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Abstract
A tri eccentric center swash plate clack valve comprises a valve body, a valve seat, a flap and a flap shaft, wherein the flap is slantways distributed with the central line of a valve flow passage, characterized in that a sealing surface of the valve seat is a part of a slant cone, a sealing line formed between the valve seat and the flap is an approximately elliptical curve, the angle alpha between the flat surface the curve is in and the central line of the valve flow passage is 60 to 70degree, the long axis center of the approximately elliptical curve sealing line forms an angular ex-centric with the cone axis line, namely the angle beta formed between the cone axis line and the central line of the valve flow passage is 15 to 20degree, the axis line of the rotary shaft on the flap forms a central ex-centric quantity of E1 against the axis line of the cone and forms a central ex-centric quantity of E2 against the flat surface O1-O1 the sealing surface is in. On the function of a dead weight and fluid pressure the flap of the valve forms a sealing, blocks a counter flowing of the fluid with a quick closing speed and a little shock between the valve sealing surface, which meet the no interference condition of the side rotating of the valve, suitable for high and low pressure fluid transmission lines.
Description
Technical field
The utility model relates to a kind of fluid flow that is applied on the fluid feed line to the safety check of controlling, specifically a kind of three eccentric inclined disc type check vavle device.
Background technique
In the pipeline of flowing mediums such as the conveying liquid of industries such as petrochemical industry, oil refining, chemical industry, chemical fertilizer, gas, widely apply the one-way flow of check vavle device with the control fluid.At present, common check valve structure form has: rotary-open type (single-lobe or multi-clove type), rise-fall type (ball-type, tapered or plane), butterfly (bivalve formula) and sphere list off-centre are inclined disc type etc.Wherein there are a common drawback in rotary-open type, rise-fall type, butterfly check valve: the rotary inertia and the inertia of its flap are bigger, and therefore, turn-off transient impacts bigger to valve sealing face, and sealing life is low and unfavorable to security of system.And the structural type that the eccentric inclined disc type safety check of sphere list has adopted sealing surface and valve axis to be in tilted layout, its sealing surface of seat and flap sealing surface are concentric spherical (part that is sphere is a billiard table), the flap running shaft departs from certain distance not on the centre of sphere, form an off-centre.Though this structure has overcome the big shortcoming of impact between the valve sealing face, but its single eccentric structural type has determined it when switch, exist interference on the valve seal pair, for flap can be rotated smoothly, adopted elastic seat, utilize the resiliently deformable of valve seat to make a concession the influence of eliminating interference, simultaneously, also just limited the intensity of valve seat, this class formation only is applicable to low-pressure line, rated pressure usually≤1.6MPa.
Summary of the invention
The purpose of this utility model is to provide that a kind of closing velocity is fast, it is little to impact between valve sealing face, satisfy the three eccentric inclined disc type safety check that secondary not interference condition, the high low pressure pipeline that rotates of valve seal all is suitable for.
For achieving the above object, the technological scheme taked of the utility model is:
A kind of three eccentric inclined disc type safety check, comprise valve body, valve seat, flap and flap running shaft, flap and valve flowing channel center line in the valve body are in tilted layout, it is characterized in that sealing surface of seat is the part of oblique cone body, the potted line that forms between valve seat and the flap is a sub-elliptical type curve, and sub-elliptical type plane, potted line place and valve flowing channel center line angle α are 60～70 °; The major axis center of sub-elliptical type potted line and cone axis shape are eccentric at an angle, be that the angle β that forms between the axis of cone and the valve flowing channel center line is 15～20 °, the axis of flap running shaft is in eccentric position with respect to the axis of cone, form an offset E1, and plane O1-O1 also is in eccentric position with respect to the sealing surface place, forms an offset E2.
Open flexibly the drift angle γ angle of sealing surface of seat place cone 〉=30 °, and the minimum value angle α 1 of circular cone drift angle γ angle and plane, sealing surface place and cone generatrices angle satisfies behind the valve closing in order to make: 1＜90 ° of 1/2 γ+α.
The three eccentric inclined disc type safety check that the utility model provides, more much smaller because the angle [alpha] angle that the flap switching process turns over is 60～70 ° than the existing corresponding corner of general safety check (85～90 °), reduce the flap rotation angle and just reduced the valve closing time.Simultaneously, also shortened the accelerating process when flap is closed, reduced impact sealing surface; Owing to taked the structural type of three off-centre, satisfied the not interference condition of rotating between valve seat and the flap.The flap of this valve is under the effect of its deadweight and hydrodynamic pressure, form sealing, stop reverse fluid flow, it also have simple and compact for structure, close characteristics such as open flexibly the back, reliable performance, valve long service life, be applicable to the high and low pressure fluid feed line.
Description of drawings
Accompanying drawing is three eccentric inclined disc type safety check embodiments' a structural representation.
Embodiment
As shown in the figure, among the three eccentric inclined disc type safety check embodiments that the utility model provides, comprise the sealing configuration that the valve seat 1 that contains the cone sealing surface and flap 2 are formed, the sealing surface of valve seat 1 is (on the O1-O1 plane, perpendicular to paper) be the part of oblique cone, the potted line that forms between valve seat 1 and the flap 2 is a sub-elliptical type curve, and the angle α of sub-elliptical type sealing curve place plane O1-O1 and valve flowing channel center line O2-O2 line is 60～70 °.The flap switching process promptly turns over the α angle, and is more much smaller than 85～90 ° of the corresponding corners of general safety check, reduces the flap rotation angle and just reduced the valve closing time.Simultaneously, also shortened the accelerating process when flap is closed, that is to say, reduced when closing, flap, valve base chamber contact the speed of moment, thereby reduce the impact to sealing surface.
The sealing curve of valve seat 1 is a sub-elliptical type curve, form by the circular cone of plane O1-O1 bevel drift angle γ, the major axis center and the cone axis of sub-elliptical type curve are non-intersect, just form an off-centre, i.e. the angle β angle of cone axis O-O and valve flowing channel center line O2-O2.Select the suitable circular cone drift angle and the angle on bevel plane, satisfy 1＜90 ° of 1/2 γ+α, wherein: in the present embodiment, circular cone drift angle γ selects between 40～55 ° at the minimum value angle α 1 of selection, plane, sealing surface place and cone generatrices angle between 30～40 °.Sealing curve on the flap 2 is identical with valve seat 1, but its spin axis 4 is crossing with cone axis O-O, and promptly flap spin axis 4 keeps an eccentric E1 with the distance of cone axis, and keeps an eccentric E2 with sealing surface place plane O1-O1, has formed two off-centre.The eccentric β angle of above-mentioned angle and offset E1, E2 rationally determine, just can satisfy the not interference condition of rotating between valve seat and the flap.
Close the back unlatching flexibly in order to make, cone apex angle γ angle should not be too little, circular cone drift angle γ angle in the present embodiment 〉=30 °.
In addition, in order to satisfy manufacture process requirement and structural requirement, valve seat 1 and valve body 3 are divided into two parts, adopt welding or other detachable connection between valve seat 1 and the valve body 3.
Though above in conjunction with the accompanying drawings detailed description has been made in the enforcement of a preferred embodiments of the present utility model; but the technician of this professional skill field is appreciated that; in design scope of the present utility model; can also make multiple variation and remodeling (for example: change certain angle and throw of eccentric) to this embodiment; will be understood that these variations and remodeling all will drop in the protection domain of appended claims qualification.
Claims (3)
1, a kind of three eccentric inclined disc type safety check, comprise valve body, valve seat, flap and flap running shaft, flap and valve flowing channel center line in the valve body are in tilted layout, it is characterized in that sealing surface of seat is the part of oblique cone body, the potted line that forms between valve seat and the flap is a sub-elliptical type curve, and plane, sub-elliptical type potted line place (01-01) is 60～70 ° with the angle (α) of valve flowing channel center line (02-02); The major axis center of sub-elliptical type potted line and cone axis shape are eccentric at an angle, be that the angle (β) that forms between the axis of sealing surface of seat place cone and the valve flowing channel center line is 15～20 °, the axis of flap running shaft is in eccentric position with respect to the axis of cone, form an offset (E1), and also be in eccentric position with respect to plane, potted line place (01-01), form an offset (E2).
2, according to claim 1 three eccentric inclined disc type safety check it is characterized in that the drift angle (γ) 〉=30 ° of above-mentioned sealing surface of seat place cone, and the angle on circular cone drift angle (γ) and bevel plane (α 1) satisfy: 1＜90 ° of 1/2 γ+α.
3, according to claim 2 three eccentric inclined disc type safety check, it is characterized in that above-mentioned circular cone drift angle (γ) select between 30～40 °, the angle (α 1) on bevel plane selects between 40～55 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620135935 CN200961733Y (en) | 2006-10-08 | 2006-10-08 | Three-eccentric slanting plate type check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620135935 CN200961733Y (en) | 2006-10-08 | 2006-10-08 | Three-eccentric slanting plate type check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200961733Y true CN200961733Y (en) | 2007-10-17 |
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ID=38798250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620135935 Expired - Lifetime CN200961733Y (en) | 2006-10-08 | 2006-10-08 | Three-eccentric slanting plate type check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200961733Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865304A (en) * | 2010-06-13 | 2010-10-20 | 无锡智能自控工程有限公司 | Balanced type eccentric rotating valve core |
| CN107504230A (en) * | 2017-10-13 | 2017-12-22 | 南通国电电站阀门股份有限公司 | The nuclear power island heart oblique valve single flow non-return valve of valve body bolt connection |
| CN108825827A (en) * | 2018-06-22 | 2018-11-16 | 中广核研究院有限公司 | Eccentric swing check valve |
-
2006
- 2006-10-08 CN CN 200620135935 patent/CN200961733Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865304A (en) * | 2010-06-13 | 2010-10-20 | 无锡智能自控工程有限公司 | Balanced type eccentric rotating valve core |
| CN101865304B (en) * | 2010-06-13 | 2012-12-26 | 无锡智能自控工程股份有限公司 | Balanced type eccentric rotating valve |
| CN107504230A (en) * | 2017-10-13 | 2017-12-22 | 南通国电电站阀门股份有限公司 | The nuclear power island heart oblique valve single flow non-return valve of valve body bolt connection |
| CN108825827A (en) * | 2018-06-22 | 2018-11-16 | 中广核研究院有限公司 | Eccentric swing check valve |
| CN108825827B (en) * | 2018-06-22 | 2021-04-02 | 中广核研究院有限公司 | Eccentric swing check valve |
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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: 20071017 |
|
| EXPY | Termination of patent right or utility model |