CN2269334Y

CN2269334Y - Anti external spray, liquid level display fuel tank with respiration valve

Info

Publication number: CN2269334Y
Application number: CN 95250417
Authority: CN
Inventors: 彭立行
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-26
Filing date: 1995-12-26
Publication date: 1997-12-03
Anticipated expiration: 2005-12-26

Abstract

The utility model relates to the improvement of a fuel tank for automobiles. A place approaching to an oil filling pipe is provided with an automatic respiration valve, and a strip-shaped float net is arranged below the fuel tank corresponding to the seat cover of the respiratory valve, wherein, the float with a float rod is provided with a funnel-shaped rubber spray preventing cover in the oil filling pipe. When oil is filled, operators can observe the position of an oil pole beacon at any moment, and pressure in and out of the fuel tank can achieve automatic balance through the respiratory valve to realize the control of gasoline evaporation in the fuel tank.

Description

Can prevent that outer spray, liquid level show, band breathing valve fuel tank

The utility model relates to the improvement to a kind of fuel tank of vehicle.

At present, when domestic automobile refueled, the driver observed oil measurer at operator's compartment, and the doper can only observe pasta rising situation at the tank filler tube place, because oil gun pressure is bigger, has both made from fuel filler pipe and has seen liquid level, close oil gun immediately, also be difficult to avoid outer spray, cause waste; Lack pressure equaliser in the fuel tank, tank pressure changes, can't self-equalizing, gasoline evaporation in the fuel tank is lost control of, and when forming negative pressure in the fuel tank, can not in time replenish air again, with outside atmosphere maintenance balance.

The purpose of this utility model is to provide a kind of and prevents that outer spray, liquid level show, band breathing valve fuel tank.The doper is when refueling, and fuel tank is provided with liquid level and shows that can observe liquid level rising situation very easily, in time closing oil gun can not spray outward; Adding breathing valve can realize can keeping balance with outside atmosphere to the control of gasoline evaporation.

The utility model is to realize so in conjunction with the accompanying drawings.Prevent outer spray by what fuel filler pipe 12 and casing 14 were formed, liquid level shows, band breathing valve fuel tank, at close fuel filler pipe place, the one breathing valve flap 4 that can rotate around bearing pin is arranged, the flap centre hole is ganged up mutually with the aperture on breathing valve seat 5 and a small pressure spring 6 and inner cap 7 is arranged, inner cap is just with the little hole plug on the cap 8 in " groove " shape, the cap flanging is along a big stage clip 9 is arranged in " groove " shape, the big stage clip other end is fixed on the gland 10, gland tightly is spun on valve body 11 tops, cap flanging outer just is buckled in and breathes on the valve seat dome in " groove " shape, one bar shaped cork line 1 is arranged below the corresponding fuel tank of breathing valve flap, the float 2 of a band float lever 3 is wherein arranged.One bell-shaped rubber oil saver 13 is arranged in fuel filler pipe.

Prevent that according to what said structure was made outer spray, liquid level show, band breathing valve fuel tank.When fuel tank need refuel, open breathing valve flap and fuel filler pipe lid, oil gun is inserted fuel filler pipe both can refuel, the operator observes the position of tank float bar at any time.When oil is full, can in time close oil gun, avoid outer spray.Extract oil gun out, close breathing valve flap and fuel filler pipe lid, promptly finish once and refuel.When tank pressure increases, can interior crown be risen by breathing valve flap central small hole, high pressure gas from interior cap flanging along exhaust to atmosphere; When the fuel tank internal gas pressure was identical with atmosphere, big spring was pressed on interior cap on the breathing valve flap and has sealed fuel tank.When the fuel tank internal gas pressure was lower than barometric pressure, atmosphere was by interior cap central small hole, and little spring is compressed, and inner cap separates with interior cap, and gas is mended in the fuel tank by breathing valve flap central small hole continually.After treating the inside and outside air pressure balance of fuel tank, on the cap, reach the inside and outside pressure of self-equalizing fuel tank in little spring is pressed on inner cap again, realize control gasoline evaporation in the fuel tank.

Description of drawings:

Fig. 1 can prevent that outer spray, liquid level show, band breathing valve fuel tank structural representation

Embodiment: press structure shown in the accompanying drawing, with adapt to homemade in, light truck or passenger vehicle fuel tank be example, can prevent that outer spray, liquid level show, band breathing valve fuel tank, its main technical details design is as follows:

Oil saver adopts nitrile rubber or oil proof rubber to make, and the oil filling port internal diameter is identical with the nozzle outside dimension;

Float adopts the EU rigid foam to blow the prestige moulding, float lever nylon 6 die casts;

Breathing valve all adopts nylon 6 die casts except that large and small spring;

Big spring adopts ∮ 1.2mm chrome alum spring wire coiled;

Little spring adopts ∮ 0.5mm silicon bronze wire coiled.

Prevent that according to what said structure was made outer spray, liquid level show, band breathing valve fuel tank.The doper is when refueling, and fuel tank is provided with liquid level and shows that can observe liquid level rising situation very easily, in time closing oil gun can not spray outward; Add breathing valve and can realize control gasoline evaporation.

Claims

1, a kind ofly prevent outer spray by what fuel filler pipe (12) and casing (14) were formed, liquid level shows, band breathing valve fuel tank, it is characterized in that at close fuel filler pipe place, the one breathing valve flap (4) that can rotate around bearing pin is arranged, the flap centre hole is ganged up mutually with the aperture on breathing valve seat (5) and a small pressure spring (6) and inner cap (7) is arranged, inner cap is just with the little hole plug on the cap (8) in " groove " shape, the cap flanging is along a big stage clip (9) is arranged in " groove " shape, the big stage clip other end is fixed on the gland (10), gland tightly is spun on valve body (11) top, cap flanging outer just is buckled in and breathes on the valve seat dome in " groove " shape, one bar shaped cork line (1) is arranged below the corresponding fuel tank of breathing valve flap, the float (2) of one band float lever 3 is wherein arranged, a bell-shaped rubber oil saver (13) is arranged in fuel filler pipe.