CN201535215U

CN201535215U - Air valve of oil tank

Info

Publication number: CN201535215U
Application number: CN2009202385060U
Authority: CN
Inventors: 顾一新
Original assignee: Dongguan Zhengyang Electronic Mechanical Co ltd
Current assignee: Dongguan Zhengyang Electronic Mechanical Co ltd
Priority date: 2009-11-05
Filing date: 2009-11-05
Publication date: 2010-07-28
Anticipated expiration: 2019-11-05

Abstract

The utility model relates to an oil tank air valve, which comprises a main body, wherein a vertical slotted hole is arranged in the main body, the top of the vertical slotted hole is provided with an air vent communicated with the outside, the bottom of the vertical slotted hole is provided with an air vent communicated with an oil tank, two movable floating balls and steel balls are arranged in the vertical slotted hole, the floating balls are positioned above the steel balls, the floating balls are close to the air vent, and the steel balls are close to the air vent; therefore, the utility model discloses utilize the activity of floater, steel ball to block or switch on the upper and lower bleeder vent of vertical slotted hole and the passageway that the air vent formed, make it under the situation that satisfies good ventilation decompression effect, still can be effectively grease proofing seepage under guaranteeing the tilt state, can accord with the relevant safety regulation standard of oil tank seepage test to bring the convenience for the use. The utility model discloses simple structure, practicality are strong, but wide application.

Description

The fuel tank air valve

Technical field

The utility model relates to the air valve art, refers in particular to a kind of fuel tank air valve that is applied to.

Background technique

As everyone knows; general automotive oil tank need discharge the gas in the casing; to regulate the pressure in the casing; if do not have vent on the fuel tank; fuel tank is exactly the container of a complete closed; behind fuel consume; when pasta reduces; to form a vacuum in the fuel tank; fuel oil can not normally be flowed out and influence the normal fuel injection of motor; so existing fuel tank ties up to and all is shaped on a little vent on the fuel tank cap in advance, communicate with ambient atmosphere to keep fuel tank internal, but fuel oil rocks in fuel tank or during overfill fuel oil usually can from little vent, overflow on a small quantity; especially when tilting, fuel tank more go out to have great amount of fuel oil from little vent, to ooze out; so can cause fuel oil waste, and fuel tank is when inclining test, leakage rate is that certain requirement is arranged; otherwise do not meet the associated safety statutory standard; the fuel oil that leaks simultaneously can produce pollution, also has hidden danger phenomenons such as (as) blasting of safe handling, and it is very inconvenient to bring to use.At present, industry also has the vent place on fuel tank cap to connect one section breathing pipe, but still can exist fuel oil to ooze out along this breathing pipe, and be to solve the problem that is produced when fuel tank tilts, Given this, the applicant researchs and develops out and aly not only can ventilate and but also can effectively prevent the fuel tank air valve of fluid seepage.

The model utility content

The utility model is at the existing disappearance of above-mentioned prior art, and main purpose is to provide a kind of fuel tank air valve of ventilating and reducing pressure and can effectively prevent fluid seepage again.

For realizing above-mentioned purpose, the utility model is taked following technological scheme:

A kind of fuel tank air valve, comprise a main body, offer a vertical slotted eye in this main body, the top of this vertical slotted eye offers the air hole that is in communication with the outside, the bottom of this vertical slotted eye is provided with the vent that is communicated with fuel tank, is positioned at vertical slotted eye and is provided with two movable ball float and steel balls, and this ball float is positioned at the steel ball top, and this ball float is near air hole, and this steel ball is near vent.

Described air hole inner side surface is provided with a trumpet-shaped sealing surface.

The utility model advantage is ball float and the steel ball by settling upper and lower layer to arrange in a vertical slotted eye, under the normal operating condition, steel ball drops on bottom, vertical slot hole under the self gravitation situation, and ball float is positioned at the steel ball top, thereby the air hole at the vent of bottom and top forms passage in the vertical slotted eye, has the ventilation effect of easing stress; When fuel tank is under the heeling condition, ball float can rise with liquid, and blocks passage under steel ball promotes, and reaches the effect that prevents fluid seepage; By this, the utility model also can effectively be prevented fluid seepage under heeling condition under the situation that satisfies the good aeration effect of easing stress, can meet the associated safety statutory standard of fuel tank seepage test, to bringing convenience property of use.

Description of drawings

Fig. 1 is the schematic cross-section under the utility model normal state;

Fig. 2 is the vertical slotted eye polycrystalline substance of a utility model schematic representation;

Fig. 3 is the utility model heeling condition (one's) a schematic cross-section;

Fig. 4 is the utility model heeling condition (twos') a schematic cross-section;

Fig. 5 is the utility model heeling condition (threes') a schematic cross-section.

The drawing reference numeral explanation:

1, main body 11, vertical slotted eye

12, air hole 13, vent

14, sealing surface 2, ball float

3, steel ball

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

See also Fig. 1, shown in Figure 2, it is the utility model fuel tank air valve normal state lower section schematic representation, it comprises a main body 1, offer a vertical slotted eye 11 in this main body 1, the top of this vertical slotted eye 11 offers the air hole 12 that is in communication with the outside, these air hole 12 inner side surfaces are provided with a trumpet-shaped sealing surface 14, the bottom of this vertical slotted eye 11 is provided with the vent 13 that is communicated with fuel tank, be positioned at vertical slotted eye 11 and be provided with two movable ball float 2 and steel balls 3, this ball float 2 is positioned at steel ball 3 tops, and this ball float 2 is near air hole 12, and this steel ball 3 is near vent 13; By this, steel ball 3 drops on 11 bottoms, vertical slot hole under the self gravitation situation, and ball float 2 is positioned at steel ball 3 tops, thereby the air hole 12 at vent 13 bottom in the vertical slotted eye 11 and top forms passages, has the ventilation effect of easing stress.

As shown in Figure 3, be the schematic cross-sections that the utility model inclination 45 is spent under the situations; Wherein ball float 2 can be with the fuel oil come-up, and touch on the sealing surface 14 of air hole 12 inner side surfaces, thereby the passage of 13 of blocking-up air hole 12 and vents prevents the effect of fluid seepage.

As shown in Figure 4, be the schematic cross-sections that the utility model inclination 90 is spent under the situations; Wherein ball float 2 can touch on the sealing surface 14 of air hole 12 inner side surfaces ball float under steel ball 3 promotes, thereby also can block the passage of 13 of air hole 12 and vents, can prevent the effect of fuel blow thereupon.

As shown in Figure 5, coefficient is the schematic cross-sections under the utility model inclination 180 degree situations; Wherein steel ball 3 can be pushed down ball float under self gravitation, and ball float still can be close on the sealing surface 14 of air hole 12 inner side surfaces, thereby can block the passage of 13 of air hole 12 and vents equally, also can prevent the effect of fuel blow thereupon.

The utility model design focal point is to utilize the air hole that activity is blocked or the vertical slotted eye of conducting is upper and lower and the formed passage of vent of ball float, steel ball, make it under the situation that satisfies the good aeration effect of easing stress, also can guarantee effectively to prevent fuel blow under the heeling condition, the associated safety statutory standard that can meet the test of fuel tank seepage, thereby to bringing convenience property of use.The utility model is simple in structure, practical, but extensive use.

The above, it only is the utility model preferred embodiment, be not that technical scope of the present utility model is imposed any restrictions, so every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any trickle modification, equivalent variations and modification that above embodiment did.

Claims

1. An air valve for fuel tank, characterized in that: it includes a main body (1), a vertical slot (11) is provided in the main body (1), and a top of the vertical slot (11) is provided with a valve communicating with the outside world. The vent hole (12) of the vertical slot hole (11) is provided with a vent hole (13) communicating with the fuel tank at the bottom of the vertical slot hole (11), and two movable floating balls (2) and A steel ball (3), the floating ball (2) is located above the steel ball (3), and the floating ball (2) is close to the air hole (12), and the steel ball (3) is close to the air hole (13).

2. The fuel tank air valve according to claim 1, characterized in that: a trumpet-shaped sealing surface (14) is provided on the inner surface of the vent hole (12).