Exhaust valve of oil tank

Abstract

The utility model relates to the technical field of exhaust valves, in particular to an oil tank exhaust valve which comprises an oil tank exhaust valve body, a valve body is arranged on the oil tank exhaust valve body, a sealing ring is sleeved on an exhaust port of the valve body, a first floater and a second floater which are movably clamped with each other are arranged in the valve body, and a sleeve is sleeved outside the valve body. A positioning protrusion is integrally arranged at the bottom of the sleeve, a spring is clamped to the positioning protrusion and located in the second floater, a small sealing gasket is clamped to the upper end of the second floater through a buckle and is in contact fit with the first floater, and a through hole penetrating up and down is formed in the first floater. According to the oil tank exhaust valve, the floater and the spring are installed in the valve body through the sleeve, the spring plays a role in damping and noise reduction on falling of the floater, meanwhile, the limiting protrusion is arranged in the floater and plays a role in limiting movement of the floater relative to the spring, the situation that the floater shakes to generate an oil leakage position is avoided, and the oil tank exhaust valve is high in overall strength and reliable in use.

Description

TECHNICAL FIELD

[0001] The utility model relates to exhaust valve technical field, concretely is a kind of oil tank exhaust valve. BACKGROUND

[0002] Oil tank exhaust valve is also called FLVV valve, with the effect of controlling fuel filling quantity, preventing oil leakage, exhaust pressure reduction, preventing oil tank from swelling.Oil tank fills oil process, due to the evaporation of oil liquid in oil tank can form pressure, before filling, pressure can be discharged to carbon tank to atmosphere by FLVV, if the pressure at this time cannot be discharged in time, then it will lead to the pressure in oil tank dramatic increase, so as to be unable to travel to fill oil, frequent gun jump. FLVV valve is provided with float, along with the closing of float, FLVV stops discharging to carbon tank, oil tank internal pressure rises, leads to a stream of fuel to return to oil filling pipe, so as to achieve the effect of gun jump. Such as the public number CN210266063U discloses a kind of CFLVV combination valve, by integrating FLVV and ROV in the valve of one valve body module, can simultaneously realize oil filling limit exhaust valve FLVV and turnover valve ROV function.

[0003] The existing oil tank exhaust valve when working, float moves up and down in valve body, and the falling of float is damped by spring, but there is usually movable gap between float and spring, so that float can appear the situation of shaking, affect the sealing property of closure, there is the danger of fuel leakage, and the structural strength is not high, can affect service life. UTILITY MODEL CONTENTS

[0004] The utility model is purposed at providing a kind of oil tank exhaust valve, to solve the problem that the float of oil tank exhaust valve in current market and spring usually exist movable gap between them, lead to float can appear the situation of shaking, affect the sealing property of closure, there is the danger of fuel leakage, and the structural strength is not high, can affect service life as described in the above background art.

[0005] To achieve the above object, the utility model provides following technical scheme: an oil tank exhaust valve, including oil tank exhaust valve main part, be equipped with valve body on oil tank exhaust valve main part, and the exhaust outlet part of valve body is equipped with sealing ring, be equipped with first floater and second floater of mutual activity clamping in valve body, and the sleeve of valve body outside is equipped, the sleeve bottom is integrally equipped with positioning protruding, and the spring is clamped on positioning protruding, and the spring is located in second floater, the small sealing pad is clamped in the upper end of second floater through buckle, and small sealing pad and first floater contact cooperation, the through -hole of up and down is equipped on first floater, and first floater is clamped and fastened with sealing pad, the sleeve and valve body side are respectively equipped with the first pressure balance hole and second pressure balance hole of corresponding position, and the oil leakage hole is equipped at the sleeve bottom interval, the one -piece structure's movable clamping piece is evenly interval -equipped on first floater side, and the lock catch is also equipped at movable clamping piece tail end, the one -piece structure's limiting protruding is evenly interval -equipped on second floater inner side, and limiting protruding and spring clamping cooperation, the limiting slot of corresponding position is equipped with movable clamping piece on second floater side, and lock catch and limiting slot are matched and clamped and limited.

[0006] Preferably, the sleeve upper end opening part is fastened and clamped with the valve body, and the sleeve bottom inner side is provided with a one-piece structure of boss, and the oil leakage hole is arranged at the boss.

[0007] Preferably, the sleeve inner side is also evenly interval -equipped with a one-piece structure of first limiting reinforcing rib, and the first limiting reinforcing rib is in contact with the outer part of the valve body.

[0008] Preferably, the valve body inner side is evenly interval -equipped with a one-piece structure of second limiting reinforcing rib, and the second limiting reinforcing rib is in clearance fit with the second floater.

[0009] Compared with the prior art, the oil tank exhaust valve has the advantages that: the oil tank exhaust valve installs the floater and the spring in the valve body through the sleeve, the spring plays a role of shock absorption and noise reduction for the falling of the floater, the limiting protrusion arranged in the floater plays a limiting role for the movement of the floater relative to the spring, avoids the oil leakage caused by the shaking of the floater, and the oil tank exhaust valve has high overall strength and reliable use. The boss structure is arranged at the position of the oil leakage hole of the sleeve, which can improve the strength of the hole opening position, the inner sides of the sleeve and the valve body are respectively limited by the limiting reinforcing ribs for the internal structure, and the structure is reinforced, and compared with the traditional welding connection between the floaters, the assembly connection between the first floater and the second floater of the device can make the two have a certain relative movement, which can better play a buffering role. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a structure schematic view of the oil tank exhaust valve of the utility model;

[0011] Figure 2 is a sectional view of the oil tank exhaust valve of the utility model;

[0012] Figure 3 is a top view of the valve body of the oil tank exhaust valve of the utility model;

[0013] Figure 4 is a top view of the sleeve of the oil tank exhaust valve of the utility model;

[0014] Figure 5 is a schematic view of the connection structure between the first float and the second float of the oil tank exhaust valve of the utility model;

[0015] Figure 6 is a schematic view of the external structure of the sleeve of the oil tank exhaust valve of the utility model;

[0016] Figure 7 is a schematic view of the front structure of the first float and the second float of the oil tank exhaust valve of the utility model;

[0017] Figure 8 is a schematic view of the assembly structure of the first float and the second float of the oil tank exhaust valve of the utility model.

[0018] In the drawing: 1, oil tank exhaust valve main body; 2, sleeve; 201, positioning protrusion; 202, boss; 203, first pressure balance hole; 204, first limiting reinforcing rib; 205, oil leakage hole; 3, valve body; 301, second pressure balance hole; 302, second limiting reinforcing rib; 4, first float; 401, movable clamping piece; 402, lock catch; 5, second float; 501, limiting groove; 502, limiting protrusion; 6, sealing ring; 7, sealing gasket; 8, small sealing gasket; 9, spring; 10, buckle. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0020] Please refer to Figures 1-8The utility model provides a technical scheme: an oil tank exhaust valve, including oil tank exhaust valve main part 1, be equipped with valve body 3 on oil tank exhaust valve main part 1, and the exhaust port part of valve body 3 is equipped with sealing washer 6, be equipped with the first floater 4 and second floater 5 of each other's movable joint in valve body 3, and valve body 3 outside is equipped with sleeve 2, sleeve 2 upper end opening part is fastened with valve body 3 and is connected, and sleeve 2 bottom inside is equipped with the boss 202 of integrated structure, and oil leak hole 205 is set up at boss 202 place, this structure makes first floater 4, second floater 5 and spring 9 can be installed in valve body 3 through sleeve 2, oil leak hole 205 is set up at boss 202 place, can guarantee the structural strength of oil leak hole 205 set up position, sleeve 2 bottom is integrally equipped with positioning protruding 201, and positioning protruding 201 is clamped with spring 9, and spring 9 is located in second floater 5, the inside of sleeve 2 is still evenly spaced and is equipped with the first limit reinforcing rib 204 of integrated structure, and first limit reinforcing rib 204 and valve body 3 outside contact and cooperate, this structure is strengthened to handle through first limit reinforcing rib 204 to sleeve 2, and through sleeve 2 to valve body 3 is positioned and is connected, realizes the stability of valve body 3 and sleeve 2.The upper end of the second float 5 is clamped with a small sealing gasket 8 through a buckle 10 of U-shaped structure, the second float 5 is provided with a clamping hole matched with the buckle 10 for fixing the small sealing gasket 8, the clamping assembly of the small sealing gasket 8 is realized, and the small sealing gasket 8 is in contact with the first float 4, the second limiting reinforcing rib 302 of integral structure is uniformly and interval provided on the inner side of the valve body 3, and the second limiting reinforcing rib 302 is in clearance fit with the second float 5, the structure plays a structure strengthening treatment on the valve body 3 through the second limiting reinforcing rib 302, the second limiting reinforcing rib 302 plays a relatively stable treatment on the second float 5, so that the second float 5 can float up and down in the valve body 3 through the limiting of the second limiting reinforcing rib 302, when the second float 5 floats up, the first float 4 is driven to float up synchronously, the first float 4 blocks the exhaust hole of the valve body 3, at this time, the fuel filling can be stopped, the movable clamping piece 401 of integral structure is uniformly and interval provided on the side surface of the first float 4, and the lock buckle 402 is further provided at the end of the movable clamping piece 401, the structure plays a sealing and damping treatment between the first float 4 and the second float 5 through the small sealing gasket 8, after the second float 5 falls down, the first float 4 falls down with the second float 5, and the exhaust treatment and the fuel backflow treatment are carried out, compared with the traditional welding connection between the floats, the assembly connection between the first float 4 and the second float 5 of the device can make a certain relative movement between the two, which can better play a buffering role, the upper and lower through holes can be provided on the first float 4, and the sealing gasket 7 is clamped and fastened on the first float 4, the first pressure balance hole 203 and the second pressure balance hole 301 corresponding in position are respectively provided on the side surface of the sleeve 2 and the valve body 3, and the oil leakage hole 205 is interval provided at the bottom of the sleeve 2, the limiting protrusions 502 of integral structure are uniformly and interval provided on the inner side of the second float 5, and the limiting protrusions 502 are clamped and matched with the springs 9, the limiting protrusions 502 of integral structure are uniformly and interval provided on the inner side of the second float 5, and the limiting protrusions 502 are clamped and matched with the springs 9, the limiting groove 501 corresponding in position with the movable clamping piece 401 is provided on the side surface of the second float 5, and the lock buckle 402 is clamped and limited in position with the limiting groove 501, the structure can prevent the first float 4 from falling off relative to the second float 5 through the cooperation of the movable clamping piece 401, the lock buckle 402 and the limiting groove 501, the first float 4 can move relative to the second float 5, and the second float 5 can drive the first float 4 to move.

[0021] Working principle: when using the oil tank exhaust valve, first, the oil tank exhaust valve body 1 is installed on the oil tank, and the sealing ring 6 plays a sealing connection role between the oil tank exhaust valve body 1 and the carbon tank. When refueling the oil tank, when the fuel level reaches the oil tank exhaust valve body 1, the fuel enters the valve body 3 through the oil leakage hole 205, the second float 5 is floated after being affected by the buoyancy, and the first float 4 is floated synchronously, the first float 4 blocks the exhaust hole of the valve body 3 through the sealing gasket 7, avoids fuel leakage, and achieves the purpose of stopping fuel filling, the lock buckle 402 is used to prevent the first float 4 from falling off the second float 5, and the fuel level is lowered after the vehicle is used, at this time, the second float 5 falls under the action of gravity, the spring 9 plays the role of shock absorption and noise reduction for the falling of the second float 5, the positioning protrusion 201 makes the spring 9 stable relative to the sleeve 2, the limiting protrusion 502 is used for the clamping and limiting of the second float 5 and the spring 9, after the second float 5 falls, the first float 4 falls with the second float 5 under the cooperation of the movable clamping piece 401 and the limiting groove 501, the small sealing gasket 8 plays the role of shock absorption and noise reduction for the falling of the first float 4, so that the exhaust hole of the valve body 3 is reopened, the fuel flows into the oil tank through the oil leakage hole 205 again, the boss 202 is used to ensure the structural strength of the oil leakage hole 205 opening area, the first pressure balance hole 203 and the second pressure balance hole 301 make the oil tank exhaust valve body 1 communicate with the oil tank, and play the role of pressure balance, the first limiting reinforcing rib 204 and the second limiting reinforcing rib 302 are respectively used for the structural strengthening treatment of the sleeve 2 and the valve body 3, so as to complete a series of work.

[0022] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An oil tank vent valve comprising an oil tank vent valve body (1), characterized in that: The oil tank exhaust valve body (1) is provided with a valve body (3), and the exhaust port part of the valve body (3) is sleeved with a sealing ring (6), the valve body (3) is provided with a first float (4) and a second float (5) which are movably connected, and the valve body (3) is sleeved with a sleeve (2), the sleeve (2) is integrally provided with a positioning protrusion (201) at the bottom, the positioning protrusion (201) is clamped with a spring (9), and the spring (9) is located in the second float (5), the upper end of the second float (5) is clamped with a small sealing pad (8) through a buckle (10), and the small sealing pad (8) is in contact with the first float (4), the first float (4) is provided with a through hole penetrating upward and downward, and the first float (4) is clamped and fastened with a sealing pad (7), the sleeve (2) and the valve body (3) are respectively provided with a first pressure balance hole (203) and a second pressure balance hole (301) corresponding in position on the side surface, and the sleeve (2) is provided with an oil leakage hole (205) at the bottom, the first float (4) is uniformly and interval provided with an integral structure of movable clamping piece (401) on the side surface, and the movable clamping piece (401) is further provided with a lock buckle (402) at the end, the second float (5) is uniformly and interval provided with an integral structure of limiting protrusion (502) on the inner side, and the limiting protrusion (502) is clamped and matched with the spring (9), the second float (5) is provided with a limiting groove (501) corresponding in position with the movable clamping piece (401) on the side surface, and the lock buckle (402) is clamped and limited in position with the limiting groove (501).

2. A tank vent valve according to claim 1, wherein: The upper end opening part of the sleeve (2) is clamped and fastened with the valve body (3), and the inner side of the bottom of the sleeve (2) is provided with an integral structure of boss (202), and the oil leakage hole (205) is arranged at the boss (202).

3. A tank vent valve according to claim 1, wherein: The inner side of the sleeve (2) is further uniformly and interval provided with an integral structure of first limiting reinforcing rib (204), and the first limiting reinforcing rib (204) is in contact with the outer part of the valve body (3).

4. A tank vent valve according to claim 1, wherein: The inner side of the valve body (3) is uniformly and interval provided with an integral structure of second limiting reinforcing rib (302), and the second limiting reinforcing rib (302) is in clearance fit with the second float (5).

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