CN201162866Y - Gravity valve of fuel tank - Google Patents

Abstract

The utility model discloses a gravity valve of a fuel tank, which relates to the structural technology of a fluid valve, in particular to a valve structure which is used for the fuel supply system of a vehicle fuel tank, wherein, in a valve body, a valve inner cover is transversely arranged; the upper and the lower parts of the valve inner cover are respectively provided with two cavities: an upper cavity and a lower cavity; two gas passages are respectively arranged in the upper and the lower cavities, a valve port which is communicated with the gas passages of the upper and the lower cavities is arranged on the valve inner cover, and a valve ball is arranged above the valve port. On the inner bottom of the lower cavity, a float is supported by a spring, one side of the upper end of the float is hinged with a valve, and the valve is arranged below the lower end surface of the valve port. When a vehicle has a much larger inclined angle or is turned over due to an accident, and under a situation that an angle between a valve which is normally installed vertically and a vertical angle is less than 70 degree, a small channel can be opened on the valve port, and high pressure gas is unloaded and decompressed through the small channel, thus guaranteeing system security, and avoiding causing an explosion.

Description

The fuel tank weight valve

Technical field

The utility model relates to a kind of structure technology of liquid valve, especially for the valve arrangement of the oil supply system of fuel tank of vehicle.

Background technique

Unimpeded in order to guarantee the fuel tank of vehicle fuel feeding, on fuel tank, be provided with weight valve, this weight valve mainly is made up of the spool of valve body and Qi Nei, in the refueling process when tank pressure is excessive, can not automatic deloading, can cause to refuel and jump rifle; Excessive when tank pressure in vehicle traveling process, high pressure oil can cause very big potential safety hazard within it, sometimes, also can cause the person and property safety.

The model utility content

The utility model purpose is to design when pressing greatly in a kind of fuel tank, the fuel tank weight valve of energy automatic deloading decompression.

The utility model is cross setting valve inner cap in valve body, upper and lower two cavitys are set in that the valve inner cap is upper and lower respectively, in upper and lower two cavitys, gas channel is set respectively, in valve, covers the valve port that is communicated with upper and lower two cavity gas channels is set, above valve port, arrange valve ball.At the inner bottom part of lower chamber, support a float by spring, one side is hinged a valve in the upper end of float, and described valve arrangement is below the lower end surface of valve port.

This weight valve is assemblied in vehicle fuel system position, and car oil flows out from fuel tank in the time of can preventing to overturn, and under the situation of low dip angle, has that efficient inhibition is flowed and the characteristic of reopening.But, the car angle of inclination is excessive or accidents happened overturns, and originally erects under the valve of installing and the situation of vertical angle less than 70 degree, and valve ball leaves the valve port upper-end surface, open valve port, and owing to press excessively in the fuel tank, will push up on the float, make valve part on the float block the lower end surface of valve port, can make valve port open a small channel, pressurized gas are through small channel off-load decompression, thereby safeguards system safety is avoided setting off an explosion.

Description of drawings

Fig. 1 is a kind of structural representation of the present utility model.

Embodiment

Cross setting valve inner cap 3 in valve body 1, upper and lower two cavitys 8,9 are set in that valve inner cap 3 is upper and lower respectively, in upper and lower two cavitys 8,9, gas channel is set respectively, the valve port 10 that is communicated with upper and lower two cavity gas channels is set on valve inner cap 3, above valve port 10, arranges rigidity valve ball 2.

Inner bottom part at lower chamber 9 is provided with the disjunctor boss, is nested with spring 6 outside boss, and spring 6 tops are supported on going to the bottom of float 5, and a side disjunctor is provided with small boss 11 in the upper end of float 5.One side of valve 4 is offered through hole, by through hole valve 4 is enclosed within on the small boss 11, and makes valve 4 be positioned at the below, lower end surface of valve port 10.

Among the figure, 7 for being arranged in the collet of valve body 1 bottom.

Claims (1)

1, fuel tank weight valve, comprise valve body, cross setting valve inner cap in valve body is provided with upper and lower two cavitys respectively in that the valve inner cap is upper and lower, in upper and lower two cavitys gas channel is set respectively, in valve, cover the valve port that is communicated with upper and lower two cavity gas channels is set, above valve port, arrange valve ball, it is characterized in that inner bottom part, support a float by spring at lower chamber, one side is hinged a valve in the upper end of float, and described valve arrangement is below the lower end surface of valve port.

Images