CN-224214782-U - Small closing height FLVV valve

CN224214782UCN 224214782 UCN224214782 UCN 224214782UCN-224214782-U

Abstract

The utility model discloses a small closing height FLVV valve, which is characterized in that a communicated gas-liquid input cavity, a valve core accommodating cavity and an exhaust cavity are arranged in a valve body, a valve core assembly is arranged in the valve core accommodating cavity to realize opening and closing of an exhaust channel, the exhaust cavity is provided with a top cavity and a communicated side end cavity, and an output pipe is at least partially communicated with the side end cavity, so that the height of the top cavity is as small as possible, the valve core accommodating cavity can extend into the exhaust cavity in the existing FLVV design scheme, namely, part of the valve core accommodating cavity is at the same height as the side end cavity, and the overall height of the valve can be further reduced. And the reduction of the height of the top chamber can enable the sealing surface at the top of the valve core accommodating cavity to be lifted along with the reduction, so that the closing height of the poppet valve is further increased, the lifting of the jump gun height of the fuel tank is realized, and the problem that the conventional FLVV valve scheme cannot meet the jump gun height requirement of the flat fuel tank is solved.

Inventors

PENG CHENG
Si Naiwen

Assignees

盈智皑壹智能汽车科技(嘉兴)有限公司

Dates

Publication Date: 20260508
Application Date: 20250319

Claims (10)

1. A small closing height FLVV valve for mounting to a fuel tank defining a direction of lifting of oil in the fuel tank as a height direction, comprising: The valve body is internally provided with a gas-liquid input cavity, a valve core accommodating cavity and a gas exhaust cavity which are communicated in sequence, the valve body is provided with a gas-liquid input channel which is communicated with the gas-liquid input cavity and the inner cavity of the fuel tank, and the valve body is provided with an output pipe which is communicated with the gas exhaust cavity; A valve core assembly disposed within the valve core accommodating chamber, the valve core assembly configured to open or close an exhaust passage communicating the valve core accommodating chamber with the exhaust chamber; The exhaust cavity comprises a top cavity and a side end cavity which are communicated with each other, wherein the top cavity is communicated with the valve core accommodating cavity through the exhaust channel, the side end cavity is not higher than the top surface of the valve core accommodating cavity in the height direction, and a connection interface at least part of the output pipe is connected to the valve body and is communicated with the side end cavity; Wherein a partition plate is arranged in the valve body, at least part of the top surface of the partition plate is used for forming the top chamber, at least part of the partition plate is configured to form a concave structure, and the concave structure is used for forming the side end chamber.
2. The small shut-off height FLVV valve according to claim 1, wherein at least a portion of the gas-liquid input chamber is higher than the valve core receiving chamber and a region of the gas-liquid input chamber higher than the valve core receiving chamber is a high chamber, and at least a portion of the gas-liquid input passage communicates with the high chamber.
3. The small closing height FLVV valve of claim 2, wherein the valve body includes a housing, a bottom housing and a top cover; The housing comprises a housing body and the partition plate arranged in the housing body, the partition plate partitions the inner space of the housing body into an upper opening chamber and a lower opening chamber, and the partition plate comprises a first plate area corresponding to the valve core accommodating cavity and a second plate area corresponding to the gas-liquid input cavity; The top cover is arranged in the upper opening cavity and is matched with the upper opening cavity to form the exhaust cavity; The valve core accommodating cavity is provided with a valve core accommodating cavity, wherein the valve core accommodating cavity is provided with a valve core accommodating cavity, and the valve core accommodating cavity is provided with a valve core accommodating cavity.
4. A small shut-off height FLVV valve as defined in claim 3, wherein at least a portion of said divider plate of said second plate area is configured to form a raised structure for forming said raised chamber.
5. The small shut-off height FLVV valve of claim 3, wherein at least a portion of said divider plate of said second plate area is configured to form said recessed feature for engaging said top cover forming a portion of said exhaust chamber.
6. The small closing height FLVV valve of claim 3, wherein the bottom housing includes a bottom plate and a spool receiving housing connected; The valve core accommodating shell is configured to extend into the lower opening cavity, the inner wall surface of the valve core accommodating shell is matched with the partition plate and the bottom plate to form the valve core accommodating cavity, and at least part of the outer wall surface of the valve core accommodating shell is matched with the shell body to form the gas-liquid input cavity; Wherein the valve core accommodating shell is provided with at least one oil liquid input channel and at least one gas input channel which are communicated with the valve core accommodating cavity and the gas-liquid input cavity, the oil liquid input channel and the gas input channel are both prevented from being positioned in the gas-liquid input channel.
7. The small shut-off height FLVV valve of claim 1, wherein the spool assembly includes a float, an elastic member and a seal assembly; The float is connected to the valve core accommodating cavity in a sliding manner along the height direction, two ends of the elastic piece are respectively connected to the float and the valve core accommodating cavity, and the sealing assembly is arranged at the top end of the float and is used for opening or closing the exhaust channel in cooperation with the float.
8. The small shut-off height FLVV valve of claim 7, wherein the sealing assembly includes an elastomeric diaphragm and at least one detent; The elastic membrane is fixed to the top end of the float through the positioning piece, and the elastic membrane is configured to elastically deform under the action of downward traction force in the height direction formed by the float.
9. The small closing height FLVV valve of claim 8, wherein the top end of the float is provided with a protrusion structure corresponding to the elastic diaphragm.
10. The small shut-off height FLVV valve of claim 1, further comprising a weld for welding to a fuel tank, the weld snap-fit to the valve body.

Description

Small closing height FLVV valve Technical Field The utility model belongs to the technical field of fuel tanks, and particularly relates to a small-closing-height FLVV valve. Background The FLVV valve, i.e., a tank vent valve (Fuel Tank Ventilation Valve), is a valve for controlling the venting and refuelling process of an automotive fuel tank. Its main function is the fuelling amount of control fuel, and when refueling, the fuel liquid level rises gradually, and the FLVV valve can be at the automatic closing refuel passageway when certain liquid level height to prevent that the fuel from filling excessively, avoid the fuel to spill over and cause potential safety hazard and environmental pollution. With the development of fuel vehicles and hybrid vehicles, the design structure of the fuel tank gradually develops towards flattening, so that the closing height of the conventional FLVV valve cannot meet the closing (gun jump) height requirement of the flat fuel tank. Disclosure of utility model The technical problem to be solved by the utility model is to provide a small closing height FLVV valve so as to solve the problem that the conventional small closing height FLVV valve scheme cannot meet the gun jump height requirement of a flat oil tank. In order to solve the problems, the technical scheme of the utility model is as follows: The utility model provides a small closing height FLVV valve, which is used for being installed to a fuel tank, and defining the lifting direction of oil in the fuel tank as the height direction, comprising the following steps: The valve body is internally provided with a gas-liquid input cavity, a valve core accommodating cavity and a gas exhaust cavity which are communicated in sequence, the valve body is provided with a gas-liquid input channel which is communicated with the gas-liquid input cavity and the inner cavity of the fuel tank, and the valve body is provided with an output pipe which is communicated with the gas exhaust cavity; A valve core assembly disposed within the valve core accommodating chamber, the valve core assembly configured to open or close an exhaust passage communicating the valve core accommodating chamber with the exhaust chamber; The exhaust cavity comprises a top cavity and a side end cavity which are communicated with each other, wherein the top cavity is communicated with the valve core accommodating cavity through the exhaust channel, the side end cavity is not higher than the top surface of the valve core accommodating cavity in the height direction, and a connection interface at least part of the output pipe is connected to the valve body and is communicated with the side end cavity; Wherein a partition plate is arranged in the valve body, at least part of the top surface of the partition plate is used for forming the top chamber, at least part of the partition plate is configured to form a concave structure, and the concave structure is used for forming the side end chamber. The small-closing-height FLVV valve is characterized in that at least part of the gas-liquid input cavity is higher than the valve core accommodating cavity, the area of the gas-liquid input cavity higher than the valve core accommodating cavity is a high-position cavity, and at least part of the gas-liquid input channel is communicated with the high-position cavity. The small closing height FLVV valve comprises a shell, a bottom shell and a top cover; The housing comprises a housing body and the partition plate arranged in the housing body, the partition plate partitions the inner space of the housing body into an upper opening chamber and a lower opening chamber, and the partition plate comprises a first plate area corresponding to the valve core accommodating cavity and a second plate area corresponding to the gas-liquid input cavity; The top cover is arranged in the upper opening cavity and is matched with the upper opening cavity to form the exhaust cavity; The valve core accommodating cavity is provided with a valve core accommodating cavity, wherein the valve core accommodating cavity is provided with a valve core accommodating cavity, and the valve core accommodating cavity is provided with a valve core accommodating cavity. The small closing height FLVV valve of the present utility model, at least a portion of said partition plate of said second plate section is configured to form a raised structure for forming said elevated chamber. In the small closing height FLVV valve of the present utility model, at least a portion of the partition plate of the second plate area is configured to form the recessed structure for engaging the top cover to form a portion of the exhaust chamber. The small closing height FLVV valve comprises a bottom plate and a valve core accommodating shell which are connected; The valve core accommodating shell is configured to extend into the lower opening cavity, the inner wall surface of the valve core accommodating shell is matched with the p