CN201354874Y

CN201354874Y - High-speed breather valve

Info

Publication number: CN201354874Y
Application number: CNU2009200001846U
Authority: CN
Inventors: 王德荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-01-06
Filing date: 2009-01-06
Publication date: 2009-12-02
Anticipated expiration: 2019-01-06

Abstract

The utility model provides a high-speed breather valve with an improved structure, which meets requirements that a positive valve can be opened and closed rapidly and can avoid 'being hammered'. The technical scheme includes that the high-speed breather valve comprises an upper casing 7 and a floater 9, the floater 9 is connected with a floater base 8, the floater base 8 is engaged with the upper casing 7, the bottom of the floater base 8 is connected with a transmission shaft 1, the transmission shaft 1 is sleeved with a hammer component 4 and a windward plate 3 through nuts 2, 6 and a spring gasket 5, and the bottom surface of the windward plate 3 is a conical surface or a conical arc surface. The inner side of the lower end of the casing 7 which is engaged with the windward plate 3 is equipped with an annular step 10, and a fit clearance between the annular step 10 and the conical surface of the windward plate 3 is relatively small ( without contacting). The annular step 10 is provided with an oblique surface which is angularly complemented with the conical surface of the windward plate 3. The high-speed breather valve with an improved structure not only resolves the problem that the positive valve can not be opened and closed rapidly when a cabin is in overpressure, but also can guarantee exhaust effect for a long time compared with a magnet device.

Description

High-speed ventilation valve

Technical field

The utility model relates to a kind of tanker sealed compartment gas venting system safety installations, is specially a kind of high-speed ventilation valve.

Background technique

High-speed ventilation valve is used for the tanker sealed compartment, when loading, navigation, ballast and unloading, need not any manual mode, and control the pressure in the cargo tank automatically, prevent oil cargo tank superpressure or vacuum.In addition, also can provide fire prevention and explosion-proof automatic protection above deck.Pressure that oil cargo tank occurs or vacuum be applied in give vent to anger or air-breathing valve disc on, when surpassing setting pressure, promptly positive valve can be opened exhaust automatically, negative pressure valve is opened air-breathing automatically, when the cabin inside and outside differential pressure was reduced to former setting level, valve disc will automatically reset moment.In negative pressure valve when work when air-breathing (), if outside, cabin flashing, spark will extinguish on the flame screen of negative pressure valve; During positive valve work, if spark is arranged out of my cabin, spark will be blown off by the high velocity air that positive valve sprays or blow out.The main purpose that high-speed ventilation valve is installed is to prevent that cargo tank from sustaining damage, and makes and be in pressurized state in the cabin all the time, suppressing the gasification of kinds of goods, thereby reduces the gasification loss of chemical product.

High-speed ventilation valve is divided into positive valve (gas outlet valve) and vacuum valve (Aspirating valves) two-part, and its outlet gas part is made up of valve casing, valve rod (push rod), valve seat housing, seat ring and valve etc.Whether sensitivity reliably can make the valve jack-up of positive valve by pulling Joystick in the action of check valve.Air-breathing part is made up of valve seat housing, valve rod (jacking axle), negative pressure valve disc, negative pressure valve and flame screen etc., and manually jack-up negative pressure valve disc is opened negative pressure valve; Unclamp the jacking axle, negative pressure valve just cuts out automatically.But, original high-speed ventilation valve positive valve part is owing to be the plane in the plate structure of facining the wind, cause positive valve when cabin pressure surpasses design pressure, can not open sans phrase rapidly, close, often be in state of suspension, and cause " hammering " to take place easily, both do not met the requirement of standard, can not control the pressure in the cargo tank well automatically, not reach good control effect; Afterwards on original basis, increased magnet at the float base position of positive valve, improved the problem that positive valve can not open, cut out particularly " hammering " rapidly, but, grown service time, and magnetic force weakens even disappears, " hammering " state before still being returned to.

The model utility content

Technical problem to be solved in the utility model is to provide a kind of high-speed ventilation valve that improves structure at the prior art present situation, satisfies positive valve and can open, closes and avoid " hammering " phenomenon rapidly.

The utility model solves the problems of the technologies described above the technological scheme that is adopted: the high-speed ventilation valve that provides, comprise that upper shell (7) and float (9), float (9) are connected with float base (8), float base (8) matches with upper shell (7), float base (8) bottom connects transmission shaft (1), transmission shaft (1) is gone up by nut (2,6), spring washer (5) and is socketed with weight assembly (4) and the plate (3) that facings the wind, and plate (3) bottom surface that facings the wind is tapering face or tapering cambered surface.

The inboard cooperation with the plate (3) that facings the wind of housing (7) lower end is provided with ring-shaped step (10), and this ring-shaped step (10) is less with the tapering face matching gap of the plate (3) that facings the wind.

Ring-shaped step (10) has and the inclined-plane of the plate that facings the wind (3) tapering face angle complementation.

The beneficial effects of the utility model are: the facing the wind structure at plate place of original high-speed ventilation valve is redesigned, according to aerodynamic principle, change the windward side into circular arc or taper, in housing cooperation place with it, increase ring-shaped step, reduced the gap.Facing the wind the plate place because the gap is little, make down with the wind that plate is subjected to big top blast power, very fast positive valve is opened, in case positive valve is opened, air-flow is gone out fast, and the cabin internal air pressure reduces, and the positive valve aperture reduces, and is tending towards closing.At this moment, be air-flow rapidly below the plate that facings the wind, then be the vortex above, above eddy stress big, below air-flow buoyancy little, this pressure difference has caused the positive valve quick closedown.The change of this kind structure, the problem that positive valve can not open rapidly, cut out when not only having solved the cabin superpressure, and, can guarantee exhaust effect for a long time than magnet arrangement.

Description of drawings

Fig. 1, the utility model high-speed ventilation valve structural representation.

The composition that hardens down with the wind of Fig. 2, the utility model high-speed ventilation valve.

Embodiment

As shown in Figure 1 and Figure 2, the high-speed ventilation valve that provides, comprise that upper shell 7 and float 9, float 9 are connected with float base 8, float base 8 matches with upper shell 7, be socketed with weight assembly 4 and the plate 3 that facings the wind by

nut

2,6, spring washer 5 on float base 8 bottoms connection transmission shaft 1, the transmission shaft 1, plate 3 bottom surfaces that facing the wind are tapering face or tapering cambered surface.The inboard cooperation with the plate 3 that facings the wind of housing 7 lower ends is provided with ring-shaped step 10, and this ring-shaped step 10 is less with the tapering face matching gap of the plate 3 that facings the wind.Ring-shaped step 10 has and the inclined-plane of the plate 3 tapering face angle complementations of facining the wind.

It is stainless steel 1Cr18Ni9Ti that the plate 3 that facings the wind adopts material, can effectively prevent corrosion.Adopt the taper windward side, it is rapider that air-flow is flowed out.Upper shell 7 adopts Cast Stainless Steel ZG1Cr18Ni9Ti.

The utility model is not limited to above-mentioned embodiment; anyone can draw other various forms of products under enlightenment of the present invention; no matter but on its shape or structure, do any variation; every have identical with a utility model or akin technological scheme, all within its protection domain.

Claims

1, high-speed ventilation valve, comprise that upper shell (7) and float (9), float (9) are connected with float base (8), float base (8) matches with upper shell (7), float base (8) bottom connects transmission shaft (1), transmission shaft (1) is gone up by nut (2,6), spring washer (5) and is socketed with weight assembly (4) and the plate (3) that facings the wind, and it is characterized in that: plate (3) bottom surface that facings the wind is tapering face or tapering cambered surface.

2, high-speed ventilation valve according to claim 1 is characterized in that: the inboard cooperation with the plate (3) that facings the wind of housing (7) lower end is provided with ring-shaped step (10), and this ring-shaped step (10) is combined with the gap with the tapering face of the plate (3) that facings the wind.

3, high-speed ventilation valve according to claim 2 is characterized in that: ring-shaped step (10) has and the inclined-plane of the plate that facings the wind (3) tapering face angle complementation.