KR100463058B1 - Vent valve structure - Google Patents

Abstract

The present invention relates to a vent valve structure,

In the conventional vane valve, the middle portion of the valve body is damaged by pushing the middle portion of the fuel tank by the rear collision of the vehicle, and the rod, valve gasket, gasket case, etc., which is a means for pushing up the steel ball by the damage of this portion, The structures are separated from each other and poured into the fuel tank. If the vehicle is overturned and turned over, the means for blocking the flow of fluid are removed. There was a problem.

Accordingly, the present invention for solving the above problems is provided with a rod for forming an inner body in which the steel ball is seated on the upper side of the upper and lower body, and in the case of pushing out the steel ball in case of need. Since the overall length is shortened by the valve gasket, the rod and the valve gasket are not affected even when the middle portion of the lower body is damaged due to the middle portion of the fuel tank being pushed by the rear collision of the vehicle. The invention relates to a vent valve structure that prevents fuel leakage due to the normal operation of the valve gasket and the rod even when flipped over.

Description

Vent valve structure

The present invention relates to a vent valve structure, and in particular, a means for controlling the flow of fluid consists of only a rod and a valve gasket so that the length of formation thereof is shortened so that the middle part of the fuel tank is pushed in by the collision of the rear of the vehicle. Even if the part is damaged, the rod and valve gasket which regulates the flow of fluid are not affected. Thus, even if the vehicle is turned upside down, the vent valve structure prevents fuel outflow due to the normal operation of the valve gasket and the rod. It is about.

In general, the fuel supply device of an automobile is responsible for supplying enough fuel to the carburetor or fuel injection device according to the engine operating condition, which is a fuel tank for storing fuel, and a fuel tank within the fuel tank. It consists of a fuel pump for pumping fuel, and a fuel supply pipe for supplying fuel supplied from the fuel tank to the combustion chamber.

The fuel tank is made of steel or plastic, and the large-capacity fuel tank is equipped with a baffle to prevent the fuel from being pulled to one side while driving on a curve road, and a ventilation device is installed inside the tank to prevent underpressure. It is.

Gasoline is evaporated to form boil-off gas inside the fuel tank having this configuration. When the evaporated gas is discharged into the air as it is, it causes environmental pollution. A canister for collecting the evaporated gas is installed, and the evaporated gas is supplied to the canister by a vant valve installed at the upper portion of the fuel tank. .

3 is a cross-sectional view showing a conventional fuel valve vent valve,

When the amount of fuel injected into the fuel tank reaches the prescribed value, the configuration of the vent valve having a function of blocking the inflow of the fuel by pushing the steel ball, the inlet 20a through which the fuel in the fuel tank 2 flows into the lower end It has a vent hole (20c, 20c ') for the evaporation gas in the fuel tank (2) in the outer circumferential portion, and the vent passage 22 for sending the evaporated gas introduced through the event hole (20c) to the canister Valve body 20 having an outlet 20b in communication with each other, a floater 32 slid along the inner wall of the valve body 20 by the fuel acting through the inlet 20a, and a pressure spring. The valve gasket 26 and the valve gasket 26 for selectively opening and closing the vent hole 20c by the elastic force of the 30 to supply the evaporated gas generated in the fuel tank 2 to the vent passage 22. It is located on the upper part The steel ball 24 and the steel ball 24 which close the vent passage 22 by seating the stopper 34 formed in the valve body 20 by the spring 30 are pressed against the valve body 20 are seated. It consists of a ball seat 28.

In the fuel tank vent valve of the above configuration, when the fuel is injected and the fuel is not full, the floater 32 mounted on the upper end of the valve body 20 is lowered along the oil level. The evaporated gas in the tank 2 is introduced through the vent hole 23c and then discharged into the vent passage 22 along the arrow direction Q and flows into the canister.

In this state, when the fuel is filled, the oil level in the fuel tank 2 is raised while the floater 32 in the valve body 20 is raised to overcome the force of the pressure spring 30 by buoyancy, thereby increasing the valve gasket ( 26) increase. Accordingly, the valve gasket 26 closes the vent hole 23c, as shown by the virtual line, thereby blocking the stopper 34 formed inside the valve body 20 and discharging it through the vent passage 22. The discharge of the evaporated gas is stopped.

The ball 24 normally opens the vent hole 20c by letting the valve gasket 26 be located below by its own weight. In this state, when the vehicle rollover accident occurs, the stopper 34 is closed by the valve gasket 26 whose position is restored by the force of the pressure spring 30 while the ball 24 is separated.

However, in the conventional vane valve, the middle portion A of the valve body 20 is damaged while the middle portion of the fuel tank is pushed by the rear collision of the vehicle, and the steel ball 24 is pushed up by the damage of this portion. Structures such as rods, valve gaskets, and gasket cases, which are means, are separated from each other and poured into the fuel tank. In this state, if the vehicle is overturned and turned over, the means for blocking the flow of fluid are removed. There was a problem that the fuel is leaked to the outside caused an explosion accident.

Accordingly, the present invention for solving the above problems is provided with a rod for forming an inner body in which the steel ball is seated on the upper side of the upper and lower body, and in the case of pushing out the steel ball in case of need. Since the overall length is shortened by the valve gasket, the rod and the valve gasket are not affected even when the middle portion of the lower body is damaged due to the middle portion of the fuel tank being pushed by the rear collision of the vehicle. It is an object of the present invention to provide a vent valve structure that prevents fuel leakage due to the normal operation of the valve gasket and the rod even if flipped over.

The present invention for achieving the above object,

The inlet is formed at the lower side, the bottom body formed with a vent hole in which the evaporation gas is introduced in the upper outer circumference and the upper body formed with an outlet hole for sending the evaporated gas to the canister to form an external shape,

Between the upper body and the lower body, the ball seat in which the steel ball is seated is formed in a streamlined shape, and the support for binding the support plate downward is formed to protrude downward, and the stopper for tightly contacting the valve gasket inside the support. Equipped with protruding inner body,

A working part having a rod for pushing the steel ball to the lower side of the inner body and formed in close contact with the stopper at the bottom of the rod to form a valve gasket to block the flow of boil-off gas;

It is characterized in that the spring is formed between the lower side of the operating portion and the support plate to apply elasticity in the direction of pushing the operating portion upward.

The cut-out portion is formed at a predetermined height of the lower body, and a plurality of vent holes are formed near the cut-off portion, so that the cut-off portion is easily broken during a rear collision of the vehicle.

1 is a cross-sectional view showing a vent valve structure of the present invention.

2 is a view showing an operating state of the present invention.

3 is a view showing a conventional vent valve structure.

※ Explanation of code for main part of drawing

1: fuel tank 2: upper body

3: lower body 4: inlet

5: vent hole 6: float

7: Block 8: Internal body

9: ball seat 10: stopper

11: support 12: support plate

13 steel ball 14 operating part

15: rod 16: valve gasket

17: spring

Hereinafter, with reference to the accompanying drawings Figures 1 and 2 will be described a preferred embodiment of the present invention.

Reference numeral 1 denotes a fuel tank for storing fuel, and a vane valve is mounted on the upper portion of the fuel tank 1 to collect and supply the boil-off gas to the canister.

The vent valve combines the upper body 2 and the lower body 3 together to form an overall appearance. A plurality of outlet holes 2a for discharging the boil-off gas to the canister is provided on the upper side of the upper body 2. Is formed, the inlet 4 for the fuel inlet is formed on the lower side of the lower body 3, a plurality of vent holes (5) for the inlet of the boil-off gas is formed on the outer periphery of the lower body (3) The inside of the lower body 3 is provided with a float 6 moving up and down along the oil surface.

At this time, the middle part of the lower body 3, especially the middle part of the fuel tank due to the rear collision of the vehicle is formed in the block portion 7 is formed in the impact portion, near the narrow portion 7 A plurality of vent holes 5 are formed in the stiffness of the narrow part 7 so that the narrow part 7 can be easily broken when an impact is applied.

On the other hand, the inside of the upper body 2 and the lower body 3 is provided with a separate inner body (8).

The outer flange of the inner body 8 protrudes the coupling flange 8a outward so that the coupling flange 8a is coupled between the upper body 2 and the lower body 3 so as to be coupled to the inner body 8. ) Is installed between the upper body (2) and the lower body (3), on the upper surface of the inner body (8) formed a ball seat (9) for the steel ball 13 is seated in a streamlined recess, On the lower side of the inner body 8, a plurality of supports 11 for projecting the support plate 12 to the lower side was formed projecting downward.

In addition, the bottom surface of the inner body (8) facing the ball seat (9) is in close contact with the valve gasket 16 to be installed in the rear to form a stopper 10 protruding annularly to block the flow of the fluid.

In case of emergency, the stopper 10 is installed to block the flow of the fluid as a means for installing the operating portion 14 to the lower side of the inner body 8, the operating portion 14 is a disk-shaped valve gasket (16) It is located between the inner body (8) and the support plate 12, and formed by protruding upwardly the rod 15 of a predetermined length integrally on the upper side of the valve gasket (16), the support plate 12 and the valve gasket ( Between the spring 16 is provided with a spring 17 to apply elasticity in the direction to push the valve gasket 16 upward.

Referring to the operation of the present invention configured as described above is as follows.

When the vehicle runs normally, the rod 15 is pushed down by the load of the steel ball 13 and the valve gasket 16 overcomes the elasticity of the spring 17 and descends so that the stopper 10 remains open. As a result, the boil-off gas present in the fuel tank 1 is introduced through the vent hole 5 and supplied to the canister through the outlet hole 2a.

On the other hand, when the intermediate portion of the fuel tank 1 is pushed in by the rear collision of the vehicle and an impact is applied to the middle portion of the lower body 3, the rigidity of the narrow portion 7 of the lower body 3 is changed to another place. Compared with the weakly formed portion, the narrowing portion 7 is separated.

In the present invention, since the means for controlling the flow of the fluid is composed of only the rod 15 and the valve gasket 16, the length of formation thereof is shortened. You can perform the operation.

That is, when the vehicle is overturned and turned upside down in the state where the cutout part 7 is separated, the steel ball 13 is separated from the ball seat 9 as shown in FIG. 2, thereby causing the valve gasket ( 16 is operated by the elasticity of the spring 17 is to close the valve gasket 16 to the stopper 10 to block the flow of fluid.

As a result, even when the vehicle is turned upside down as shown in FIG. 2, the fuel in the fuel tank is not leaked to the outside through the vent valve, thereby preventing the explosion accident caused by the fuel leakage.

As described above, the present invention forms an inner body in which the steel ball is seated on the upper side of the upper and lower body, and in such a case, a means for blocking the flow of the fluid while pushing the steel ball into a valve gasket having a rod. As the overall length is shortened, the rod and the valve gasket are not affected even when the middle portion of the lower body is damaged due to the middle portion of the fuel tank being pushed by the rear collision of the vehicle, and thus the vehicle is turned upside down. The effect of providing a vent valve structure in which fuel leakage does not occur by the normal operation of the valve gasket and the rod can be expected.

Claims (3)

An upper inlet 4 is formed at the lower side, a lower body 3 having a vent hole 5 through which evaporated gas is introduced at the upper outer periphery, and an upper body at which an outlet hole 2a for sending the evaporated gas to the canister is formed. 2) combine with each other to form an appearance, The support 11 for fastening the ball seat 9 in which the steel ball 13 is seated on the upper side between the upper body 2 and the lower body 3 in a streamlined manner, and for supporting the support plate 12 to the lower side. Is formed to protrude downward, and the inner body 8 is formed with a stopper 10 protruding from the valve gasket 16 to the inside of the support 11, A valve having a rod 15 for pushing the steel ball 13 to the lower side of the inner body 8 and in close contact with the stopper 10 at the lower end of the rod 15 to block the flow of boil-off gas. Forms an actuating portion 14 on which a gasket 16 is formed, Vant valve structure, characterized in that the spring (17) is applied between the lower side of the operating portion and the support plate (12) to apply the elasticity in the direction of pushing up the upper portion (14). The method of claim 1, The concave portion 7 is formed at a predetermined height of the lower body 3, and a plurality of vent holes 5 are formed in the vicinity of the concave portion 7 so that the concave portion 7 is easily removed in the rear of the vehicle. Bent valve structure, characterized in that the damage. The method of claim 1, Vent valve structure, characterized in that the rod (15) is integrally formed at the center of the valve gasket (16) so that the rod (15) and the valve gasket (16) are not separated from each other even when an impact is applied.