CN200977856Y

CN200977856Y - Unidirectional conducting oil box cover

Info

Publication number: CN200977856Y
Application number: CN 200620125193
Authority: CN
Inventors: 马云峰
Original assignee: Individual
Current assignee: SUZHOU ERMA MECHANICAL AND ELECTRICAL CO Ltd
Priority date: 2006-11-09
Filing date: 2006-11-09
Publication date: 2007-11-21
Anticipated expiration: 2016-11-09

Abstract

The utility model discloses a gasoline tank cover with the function of single-way guide through, comprising a cover body, a stamping part arranged inside the cover body, a sealing ring and a vent pipe, wherein the vent pipe has a check valve which is a elastic rubber tube; the tube hole of the elastic rubber tube presents a inverse taper and the lower end is closed so that the gasoline tank cover has the function of single-way guide through, thus external air can go into the gasoline tank so that the air pressure inside will not decrease to the degree of negative pressure and the fuel inside the gasoline tank will not leak which is caused by the toppling of the gasoline tank and fuel volatilization.

Description

The fuel lid of unidirectional conducting

Technical field

The utility model relates to a kind of fuel lid of unidirectional conducting.

Background technology

In the prior art, the fuel lid breather pipe is housed in the fuel lid, the fuel lid breather pipe is two-way breather pipe, when oil tank breather liquid level in fuel tank descends, import air, keep the air pressure in the fuel tank normal, but, because the fuel lid breather pipe is a beidirectional, when fuel tank is toppled over, may cause the leakage of fuel in the fuel tank, and the fuel in the fuel tank mostly is volatile substances, under normal circumstances, beidirectional fuel lid breather pipe also can make the fuel of volatilization leak by the fuel lid breather pipe.

Summary of the invention

The utility model purpose is: a kind of fuel lid of unidirectional conducting is provided, outside air is added in the fuel tank, the fuel in the fuel tank can not toppled over or fuel volatilization and leaking because of fuel tank.

The technical solution of the utility model is: a kind of fuel lid of unidirectional conducting, and comprise lid, be installed in fuel lid blanked part, seal ring and fuel lid breather pipe in the lid, described fuel lid breather pipe is a check valve.

The further technical scheme of the utility model is: a kind of fuel lid of unidirectional conducting, and comprise lid, be installed in fuel lid blanked part, seal ring and fuel lid breather pipe in the lid, described fuel lid breather pipe is a check valve; Described fuel lid breather pipe is an elastic rubber pipe, and the pore of elastic rubber pipe is a back taper, and the lower end closure.

The utility model advantage is:

1. the utility model is equipped with check valve on fuel lid, and outside air is added in the fuel tank, avoids fuel tank negative pressure condition in use to occur.

2. the utility model can avoid fuel tank to cause the leakage of fuel in the fuel tank when toppling over, and can also prevent that the fuel in the fuel tank from leaking because of volatilization.

Below in conjunction with drawings and Examples the utility model is further described:

Description of drawings

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

Fig. 2 is a scheme of installation of the present utility model.

Wherein: 1 lid; 2 fuel lid blanked parts; 3 seal rings; 4 fuel lid breather pipes; 5 pores.

The specific embodiment

Embodiment: as Fig. 1, shown in Figure 2, a kind of fuel lid of unidirectional conducting, fuel lid blanked part 2 is installed in the lid 1, seal ring 3 is installed on the fuel lid blanked part 2, fuel lid breather pipe 4 is installed on the fuel lid blanked part 2, fuel lid breather pipe 4 is an elastic rubber pipe, the pore 5 of elastic rubber pipe is a back taper, and the lower end closure makes fuel lid breather pipe 4 form check valves, and the difference that deducts fuel tank internal gas pressure value when the atmospheric gas pressure value is during less than a certain critical value, pore 5 lower ends of fuel lid breather pipe 4 are in closure state, fuel tank is not communicated with the external world, and the difference that deducts fuel tank internal gas pressure value when the atmospheric gas pressure value is during greater than critical value, and pore 5 lower ends of unidirectional fuel lid breather pipe 4 are washed open by air because of pressure, the air admission fuel tank, tank pressure rises, and when difference of pressure during less than critical value, the lower end of pore 5 is closed again.

The utility model is equipped with check valve on fuel lid, outside air is added in the fuel tank, avoids fuel tank negative pressure condition in use to occur; The utility model can avoid fuel tank to cause the leakage of fuel in the fuel tank when toppling over, and can also prevent that the fuel in the fuel tank from leaking because of volatilization.

Claims

1. the fuel lid of a unidirectional conducting comprises lid (1), is installed in fuel lid blanked part (2), seal ring (3) and fuel lid breather pipe (4) in the lid (1), and it is characterized in that: described fuel lid breather pipe (4) is a check valve.

2. according to the fuel lid of claim with described unidirectional conducting, it is characterized in that: described fuel lid breather pipe (4) is an elastic rubber pipe, and the pore of elastic rubber pipe (5) is a back taper, and the lower end closure.