CN2238758Y

CN2238758Y - Fuel tank cover

Info

Publication number: CN2238758Y
Application number: CN 95217874
Authority: CN
Inventors: 郑玉龙
Original assignee: Sanlong Industrial Co ltd
Current assignee: Sanlong Industrial Co ltd
Priority date: 1995-07-13
Filing date: 1995-07-13
Publication date: 1996-10-30
Anticipated expiration: 2005-07-13

Abstract

The utility model relates to a fuel tank cover which comprises a cylinder body sheathed in the fuel filling pipe mouth of the fuel tank, an outer cover sheathed on the front end of the cylinder body for holding and applying force, an O-shaped leakage stopping ring, a bottom cover sheathed on the back end of the cylinder body, a gas throttling disc, a positive pressure adjusting component, and a negative pressure adjusting component. The utility model is fixed on the fuel filling pipe mouth of the fuel tank. When the pressure in the fuel tank is too high, the movable part of the positive pressure adjusting component can discharge a part of gas in the fuel tank; when the pressure in the fuel tank is too low, the movable part of the negative pressure adjusting component can be used for the gas outside the fuel tank to enter the fuel tank, and thereby, the gas pressure of the fuel tank is balanced.

Description

Fuel lid

The utility model relates to a kind of fuel lid, particularly about the fuel lid of the gaseous tension of a kind of scalable, trim tank.

General known fuel lid, the function that locking tank filler tube mouth is only arranged, and stay a deflation hole on the fuel door surface, to avoid fuel tank to be out of shape because of pressure, but the fuel lid of the tank filler tube mouth that these are known, can cause oil gas constantly to overflow, except that causing the insignificant evaporation waste of oil product, also cause the aerial contamination of external environment by deflation hole because of evaporation; Again, if fuel tank is toppled over, for example automobile or locomotive are toppled over when overturning, and the oil in the fuel tank can flow out from the deflation hole of fuel door, has increased the risk of catching fire.So the real difficulty of the fuel lid of the tank filler tube mouth of commonly using meets modern environmental protection and safe requirement, exist many shortcomings and remain further to be improved.

In view of this, the purpose of this utility model is to provide a kind of fuel lid, but its effective closure tank filler tube mouth, in the gaseous tension that can regulate automatically again in case of necessity in the fuel tank; Promptly, in the time of in the gaseous tension in the fuel tank is maintained at a limited range, fuel lid is sealing, when the gaseous tension in the fuel tank is excessive, a part of gas in the fuel tank can be discharged, when the pressure in the fuel tank is too small, but the outer gas of oil feeding reservoirs enters, but effective closure tank filler tube mouth thus, and in can regulate automatically again in case of necessity, gaseous tension in the trim tank.

For achieving the above object, the fuel lid that the utility model provides comprises: a cylinder body, and cover is filled in a tank filler tube mouth, and it has a bulge loop and a dividing plate, hole in the middle of this dividing plate has; One enclosing cover is socketed on the front end of this cylinder body, and it is available for gripping the application of force; One leak-stopping O type ring is socketed on the outside of this cylinder body; One bottom is socketed on the rear end of this cylinder body; One gas throttling disk places in this cylinder body, circular hole and at least one (can be one, two, three, four or more a plurality of) ventilation side opening in the middle of this gas throttling disk has one, and the ventilation pipe surrounds this centre circular hole in the middle of convexing with one; One malleation adjusting part places between the dividing plate and gas throttling disk in this cylinder body, and this malleation adjusting part is made up of a cone-shaped spring, a V-shaped valve and a target seeker; One negative pressure adjusting part places between the gas throttling disk and bottom in this cylinder body, and this negative pressure adjusting part is made up of a diaphragm valve, a circular plates and a spring.

The V-shaped valve of this malleation adjusting part place this gas throttling disk in the middle of the mouth of pipe place of ventilation pipe, and by the elastic force of cone-shaped spring make with the guiding of target seeker the V-shaped valve top clog this gas throttling disk in the middle of the ventilate mouth of pipe of pipe.

The diaphragm valve of this negative pressure adjusting part contacts with a bottom surface of this gas throttling disk, and by the compressing of circular plates and the elastic force of spring, and make diaphragm valve seal the ventilation side opening of this gas throttling disk.

Therefore, when this fuel lid is fixed in the tank filler tube mouth, when the pressure in the fuel tank is excessive, the action of malleation adjusting part, a part of gas in the fuel tank can be discharged, when the pressure in the fuel tank is too small, the action of negative pressure adjusting part, but the outer gas of oil feeding reservoirs enters, thus the gaseous tension of trim tank.

In addition, this cylinder body front end inner edge has a handle ratchet wheel, enclosing cover has an outer ratchet, the handle ratchet wheel of this cylinder body front end inner edge matches with the outer ratchet of this enclosing cover and becomes escapement, therefore, when this enclosing cover screws when reaching to a certain degree, escapement comes into force and dallies, and can avoid fuel tank cap lock to die from the tank filler tube mouth.

This shows, but the utility model fuel lid effective closure fuel tank, in the gaseous tension that can regulate automatically again in case of necessity in the fuel tank, be suitable as the lid of regular price gasoline (or similarly volatile fuels or solvent) case, also be suitable as the fuel lid of motor bike, automobile or other vehicle.

For being easy to explanation, the utility model can be by following preferred embodiment and accompanying drawing in the hope of better understanding.

Fig. 1 is the decomposing schematic representation of a preferred embodiment of the present utility model.

Fig. 2 is for when the pressure in the fuel tank is excessive, and the gas in the fuel tank diffuses to the scheme drawing of the external world's (fuel tank is outer) via the utility model.

Fig. 3 is for when the pressure fuel tank in is too small, and the gas of the external world (fuel tank outward) enters scheme drawing in the fuel tank via the utility model.

Fig. 4 is installed on the scheme drawing at automotive oil tank filler neck place for a preferred embodiment of the present utility model.

See also shown in Figure 1, the utility model fuel lid 1, its cylinder body 2, bulge loop 21 and dividing plate 22 are one-body molded with plastic cement, this dividing plate 22 is one to have the plectane of middle hole 23, this dividing plate 22 is fixed on the inwall of cylinder body 2 by several fixed arms 24; One enclosing cover 3 is socketed on the front end of this cylinder body 2, and it is available for gripping the application of force; One leak-stopping O type ring 4 is socketed on the outside of this cylinder body 2, as the leakage washer between bulge loop 21 and the tank filler tube mouth; One bottom 5 is sticked in the inner edge place of cylinder body 2 rear ends; One gas throttling disk 6 places in the cylinder body 2, circular hole 61 and four ventilation side openings 62 in the middle of it has one, and ventilation pipe 63 surrounds this centre circular hole 61 in the middle of convexing with one; One malleation adjusting part 7 places between the dividing plate 22 and gas throttling disk 6 in this cylinder body 2, and it is made up of a cone-shaped spring 71, a V-shaped valve 72 and a target seeker 73; One negative pressure adjusting part 8 places between the gas throttling disk 6 and bottom 5 in the cylinder body 2, and it is made up of a diaphragm valve 81, a circular plates 82 and a spring 83.

The V-shaped valve 72 of this malleation adjusting part 7 places the mouth of pipe place of the middle ventilation pipe 63 of gas throttling disk 6, V-shaped valve 72 front ends are equipped with cone-shaped spring 71, thrust by cone-shaped spring 71 makes V-shaped valve 72 tops clog the mouth of pipe of the middle ventilation pipe 63 of this gas throttling disk 6, and V-shaped valve 72 rear ends are equipped with a target seeker 73, the guiding V-shaped valve 72 that it can be assisted, crooked when avoiding moving.

The diaphragm valve 81 of this negative pressure adjusting part 8 contacts with the bottom surface of this gas throttling disk 6, in order to seal four ventilation side openings 62; It withstands circular plates 82 by the thrust of spring 83, circular plates 82 compressing diaphragm valves 81, and make diaphragm valve 81 be able to certain four ventilation side openings 62 sealing this gas throttling disk 6.

See also Fig. 2 and shown in Figure 4, when this fuel lid 1 is fixed in the tank filler tube mouth, when the pressure in the fuel tank excessive (greater than the sum total of the thrust of external atmospheric pressure and cone-shaped spring 71), 7 actions of malleation adjusting part, be that gas in the fuel tank is via the middle circular hole 52 of bottom 5 side opening 51 of bottom 5 (or by), the middle circular hole 821 of circular plates 82, the middle circular hole 811 of diaphragm valve 81, the middle circular hole 61 of gas throttling disk 6, and with V-shaped valve 72 push away a little in the middle of the ventilation pipe 63 the mouth of pipe, and the generation slit, gas in the fuel tank is overflowed by the slit between the mouth of pipe of V-shaped valve 72 and middle ventilation pipe 63, then diffuse to external world's (fuel tank is outer).

See also Fig. 3 and shown in Figure 4, when the pressure in fuel tank when too small (pressure in the fuel tank adds the sum total of thrust of upper spring 83 less than external atmospheric pressure), 8 actions of negative pressure adjusting part, extraneous air pushes away diaphragm valve 81 bottom surface of gas throttling disk 6 a little via four ventilation side openings 62 of gas throttling disk 6, and the generation slit, extraneous air enters via this slit, and the middle circular hole 52 by bottom 5 side opening 51 of bottom 5 (or by) enters in the fuel tank again.

When the pressure in the fuel tank not excessive (being not more than the sum total of the thrust of external atmospheric pressure and cone-shaped spring 71) only little (sum total that the pressure in the fuel tank adds the thrust of upper spring 83 is not less than external atmospheric pressure), malleation adjusting part 7 all is failure to actuate with negative pressure adjusting part 8, gas in the fuel tank is not overflowed outside the fuel tank, extraneous air does not enter in the fuel tank yet, and this moment, fuel lid 1 sealed up fuel tank.

Please consult shown in Figure 1 again, for avoiding fuel lid 1 locked in the tank filler tube mouth, these cylinder body 2 front end inner edges have a handle ratchet wheel 25, enclosing cover 3 has an outer ratchet 31, the handle ratchet wheel 25 of these cylinder body 2 front end inner edges matches with the outer ratchet 31 of this enclosing cover and becomes escapement, therefore, and when this enclosing cover 3 screws when reaching to a certain degree, escapement comes into force and dallies, and can avoid fuel lid 1 locked in the tank filler tube mouth.

Above only a kind of for preferred embodiment of the present utility model who discloses allly comes from technological thought of the present utility model and is change or the modification of being familiar with the part that the people was easy to know by inference of this skill, all do not break away from patent scope of the present utility model.

In sum, no matter the utility model all differs from known technical characterictic with regard to purpose, means and effect, and it is at first created and also has a progressive and can supply the industry utilization.

Claims

1, a kind of fuel lid, it is fixed in tank filler tube mouth place, it is characterized in that comprising:

One cylinder body, cover is filled in the tank filler tube mouth, and it has a bulge loop and a dividing plate, hole in the middle of this dividing plate has;

One enclosing cover, it is socketed on the front end of this cylinder body;

One leak-stopping O type ring, it is socketed on the outside of this cylinder body;

One bottom, it is socketed on the rear end of this cylinder body;

One gas throttling disk, it places in this cylinder body, circular hole and at least one ventilation side opening in the middle of it has one, and the ventilation pipe surrounds this centre circular hole in the middle of convexing with one;

One malleation adjusting part, it places between this cylinder body interior dividing plate and gas throttling disk, and it is made up of a cone-shaped spring, a V-shaped valve and a target seeker; When tank pressure was excessive, this malleation adjusting part was in conduction position;

One negative pressure adjusting part, it places between this cylinder body interior the gas throttling disk and bottom, and it is made up of a diaphragm valve, a circular plates and a spring; When tank pressure was too small, this negative pressure adjusting part was in conduction position.

2, fuel lid as claimed in claim 1, it is characterized in that: the V-shaped valve of this malleation adjusting part place this gas throttling disk in the middle of the mouth of pipe place of ventilation pipe, and push up with the guiding of target seeker by the elastic force of cone-shaped spring and to fill in ventilation pipe mouth in the middle of this gas throttling disk.

3, fuel lid as claimed in claim 1 is characterized in that: the diaphragm valve of this negative pressure adjusting part contacts with the bottom surface of this gas throttling disk, and is sealed the ventilation side opening of this gas throttling disk by the elastic force of the compressing of circular plates and spring.

4, fuel lid as claimed in claim 1 is characterized in that: this cylinder body front end has a handle ratchet wheel, and this enclosing cover has an outer ratchet, and the handle ratchet wheel of this cylinder body front end matches with the outer ratchet of this enclosing cover and becomes an escapement.

5, fuel lid as claimed in claim 1 is characterized in that: the ventilation side opening of this gas throttling disk is four.