CN213451917U

CN213451917U - Pressure valve for fuel tank

Info

Publication number: CN213451917U
Application number: CN202022437501.XU
Authority: CN
Inventors: 李海波; 王凯
Original assignee: Ali Automotive Systems Suzhou Co ltd
Current assignee: Ali Automotive Systems Suzhou Co ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2021-06-15
Anticipated expiration: 2030-10-28

Abstract

The utility model provides a pressure valve for a fuel tank, which comprises a main shell, wherein the main shell comprises a first containing cavity and a second containing cavity, the first containing cavity is communicated with the second containing cavity through a channel, and the bottom of the first containing cavity is provided with a bottom cover for sealing the bottom of the first containing cavity; a floating valve core is arranged in the first cavity, a spring which elastically biases the floating valve core is arranged between the floating valve core and the bottom cover, and a flow guide nozzle communicated with the interior of the second cavity is arranged on one side of the second cavity; and a sealing seat is arranged in the second accommodating cavity, and a sealing block is arranged on the sealing seat. The utility model discloses a pressure valve for fuel tank holds the seal receptacle and the sealed stifled piece that the chamber set up through the second for can prevent to get into to the fuel tank in from the backflow gas of water conservancy diversion mouth department.

Description

Pressure valve for fuel tank

Technical Field

The present invention relates to a valve device, and more particularly, to a pressure valve for a fuel tank.

Background

Fuel pumps are generally classified into an external fuel pump provided in an engine room and an internal fuel pump provided in a fuel tank, and the fuel pumps are driven by a DC motor to obtain a stored power, and supply fuel stored in the fuel tank to an injector. The fuel tank is provided with a fuel tank pressure valve for preventing fuel or vapor gas in the fuel tank from leaking to the outside when the automobile overturns.

That is, since the fuel of the automobile has high volatility, it is easily evaporated into a gaseous state in the case where outdoor temperature is high like summer, when the evaporated gas is filled in the fuel tank, the pressure inside the fuel tank is increased, the fuel or the evaporated gas may leak, and explosion occurs at the time of a collision accident to enlarge the loss. Therefore, in a fuel supply system for an automobile in general, a fuel tank pressure valve is provided in a fuel tank in order to prevent fuel from entering a conduit due to fuel flow or inclination of a vehicle body, which occurs during traveling of the automobile, by introducing vapor gas from the fuel tank into an intake pipe of an intake system, and by sucking the vapor gas into a cylinder together with air to burn the vapor gas.

However, in the conventional pressure valve for a fuel tank, no structure for preventing gas from flowing back from the nozzle is provided in the pressure valve.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a to the not enough of existence among the prior art, provide the pressure valve for the fuel tank.

The utility model discloses a realize through following technical scheme: pressure valve for a fuel tank, comprising:

the main shell comprises a first cavity and a second cavity, the first cavity is communicated with the second cavity through a channel, and the bottom of the first cavity is provided with a bottom cover for sealing the bottom of the first cavity;

the floating valve core is movably arranged in the first cavity, a spring which is elastically biased to the floating valve core and arranged between the floating valve core and the bottom cover moves in the first cavity through the floating valve core, so that the floating valve core closes or opens the channel;

the flow guide nozzle is fixedly arranged on one side of the second cavity and is communicated with the interior of the second cavity;

and a sealing seat is arranged in the second accommodating cavity, and a sealing block is arranged on the sealing seat.

In the above technical scheme, the main casing body is provided with an upper end opening, and the opening upper cover is provided with a cover plate for sealing the opening.

In the technical scheme, the main shell is provided with a limiting buckle groove and further comprises an installation cover plate, a buckle pin extending downwards is arranged on the installation cover plate, and the buckle pin is buckled into the limiting buckle groove.

In the technical scheme, the buckling feet are arranged on the left side, the right side and the rear side of the mounting cover plate.

In the above technical scheme, two longitudinally extending guide ribs are arranged on the side wall of the floating valve core, and a guide groove matched with the guide ribs in shape and position is arranged at a position corresponding to the first accommodating cavity.

The utility model discloses following beneficial effect has: the utility model discloses a fuel cell is with sealed seat and the sealed stifled piece that holds the intracavity through the second for can prevent to get into to the fuel tank in from the backflow gas of water conservancy diversion mouth department.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is an exploded view of the present invention.

Fig. 3 is a schematic sectional view of the present invention.

Fig. 4 is a schematic diagram of the floating valve element of the present invention in cooperation with the main housing.

Detailed Description

The invention will be described in further detail with reference to the following detailed description and accompanying drawings: referring to fig. 1 to 4, the pressure valve for a fuel tank includes a main housing 1 having an upper end opening 100, where the main housing 1 includes a first cavity 11 and a second cavity 12, the first cavity 11 and the second cavity 12 are communicated through a passage 200, and a bottom cap 10 sealing the bottom of the first cavity 11 is disposed at the bottom of the first cavity 11.

A floating valve core 2 is movably arranged in the first accommodating cavity 11, a spring 8 which is elastically biased to the floating valve core and arranged between the floating valve core 2 and the bottom cover 11 is used for enabling the floating valve core 2 to close or open the channel 200 through the movement of the floating valve core 2 in the first accommodating cavity 11. A diversion nozzle 3 is fixedly arranged on one side of the second accommodating cavity 12 and is communicated with the inside of the second accommodating cavity 12, and preferably, the diversion nozzle 3 and the side wall of the second accommodating cavity 12 are integrally formed. A sealing seat 4 is arranged in the second accommodating cavity 11, a sealing block 5 is arranged on the sealing seat 4, and a cover plate 6 for sealing the opening 100 is arranged on the upper cover.

In the structure, the components in the upper end opening of the pressure valve for the whole fuel tank can be conveniently installed through the cover plate 6, and in addition, the backflow gas from the diversion nozzle 3 can be prevented from entering the fuel tank through the sealing seat 3 and the sealing block 5 which are arranged in the second accommodating cavity 12.

The main casing 1 is provided with a limit buckle groove 13, the installation cover plate 7 is further included, a buckle pin 70 extending downwards is arranged on the installation cover plate 7, and the buckle pin 70 is buckled into the limit buckle groove 13 so that the installation cover plate 7 and the main casing 1 are fixed. In the above structure, the mounting cover 7 may be configured to fit the relevant components so as to be fixedly engaged with the components. Preferably, the fastening legs 70 are disposed at both left and right sides and a rear side of the mounting cover 7 so as to enable the main housing 1 and the mounting cover 7 to be firmly fixed.

Two guide ribs 20 extending longitudinally are arranged on the side wall of the floating valve core 2, and a guide groove 14 matched with the guide ribs in shape and position is arranged at a position corresponding to the first cavity 11. The structure is convenient for providing guidance for the floating valve core 2 during movement, and the floating valve core is prevented from shaking left and right.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The foregoing embodiments and description of the invention have been provided in the present application for the purpose of illustrating the principles of the invention and is subject to various changes and modifications without departing from the spirit and scope of the invention. All such variations and modifications are intended to be within the scope of the claimed invention.

Claims

1. A pressure valve for a fuel tank, comprising:

the main shell (1) comprises a first cavity (11) and a second cavity (12), the first cavity (11) is communicated with the second cavity (12) through a channel (200), and a bottom cover (10) for sealing the bottom of the first cavity (11) is arranged at the bottom of the first cavity (11);

the floating valve core (2) is movably arranged in the first cavity (11), and a spring (8) which is arranged between the floating valve core (2) and the bottom cover (11) and elastically biases the floating valve core moves in the first cavity (11) through the floating valve core (2) so that the floating valve core (2) closes or opens the channel (200);

the flow guide nozzle (3) is fixedly arranged on one side of the second containing cavity (12) and is communicated with the inside of the second containing cavity (12);

a sealing seat (4) is arranged in the second containing cavity (12), and a sealing block (5) is arranged on the sealing seat (4).

2. A pressure valve for a fuel tank as defined in claim 1, wherein: the main shell (1) is provided with an upper end opening (100), and a cover plate (6) for sealing the opening (100) is arranged on the opening in a covering mode.

3. A pressure valve for a fuel tank as defined in claim 1, wherein: the main casing body (1) is provided with a limiting buckle groove (13), the installation cover plate (7) is further included, a buckle foot (70) extending downwards is arranged on the installation cover plate (7), and the buckle foot (70) is buckled into the limiting buckle groove (13).

4. A pressure valve for a fuel tank according to claim 3, wherein: the buckling feet (70) are arranged on the left side, the right side and the rear side of the mounting cover plate (7).

5. A pressure valve for a fuel tank as defined in claim 1, wherein: two guide ribs (20) extending longitudinally are arranged on the side wall of the floating valve core (2), and a guide groove (14) matched with the guide ribs in shape and position is arranged at a position corresponding to the first accommodating cavity (11).