CN213116498U

CN213116498U - EVAP system two-way safety valve device

Info

Publication number: CN213116498U
Application number: CN202022193871.3U
Authority: CN
Inventors: 肖钢平; 刘改丽
Original assignee: Shanghai Xinhe Industry Co ltd
Current assignee: Shanghai Xinhe Industry Co ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-05-04
Anticipated expiration: 2030-09-29

Abstract

The utility model relates to the technical field of safety valves, and a two-way safety valve device of EVAP system is disclosed, including first valve and second valve, when EVAP system normal pressure is great with the external atmospheric pressure difference, first valve receives the effect of atmospheric pressure, when the strength of atmospheric pressure exceeds the elasticity of first spring, first valve and second valve wholly move upwards, produce the clearance between first valve and the first sealing washer, the too high malleation of EVAP system releases the external world through clearance and gas outlet, the too high malleation of EVAP system can release and descend, when EVAP system is great with the external negative pressure atmospheric pressure difference, the second valve receives the effect of atmospheric pressure, when the strength of atmospheric pressure exceeds the elasticity of second spring, the second valve moves downwards, produce the clearance between second valve and the second sealing washer, the external gas gets into the balanced pressure difference of EVAP system through gas outlet and clearance, the too high negative pressure of EVAP system can release, the utility model relates to a novelty has simple structure, convenient to use, advantage that the security is good.

Description

EVAP system two-way safety valve device

Technical Field

The utility model relates to a relief valve technical field specifically is a two-way relief valve device of EVAP system.

Background

The EVAP system, namely a fuel evaporation control system, can store fuel vapor generated by a fuel system, prevent the fuel vapor from leaking into the atmosphere, and simultaneously timely send the collected fuel vapor into an intake manifold to be mixed with normal mixed gas and then enter an engine for combustion, so that the fuel is fully utilized.

In the EVAP system, a two-way relief valve is required. However, in practical application, the conventional safety valve generally has the problems of complex structure, poor safety, inconvenience in use and the like.

Based on the above, we propose a two-way safety valve device of an EVAP system, and hopefully solve the disadvantages in the prior art.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a two-way relief valve device of EVAP system possesses simple structure, convenient to use, the good advantage of security.

(II) technical scheme

For the purpose that realizes above-mentioned simple structure, convenient to use, security are good, the utility model provides a following technical scheme: a two-way safety valve device of an EVAP system comprises a shell, wherein the top of the shell is provided with an air outlet, the left side of the shell is provided with a first interface, and the right side of the shell is provided with a second interface;

the inner wall of the shell is fixedly connected with a shelf, the outer wall of the shelf is fixedly connected with a first sealing ring, and the top of the first sealing ring is movably connected with a first valve;

the bottom fixedly connected with second sealing washer of first valve, the bottom swing joint of second sealing washer has the second valve.

As an optimized technical scheme of the utility model, the carbon tank of EVAP system is connected to first interface, second interface connection CVS valve, DMTL or carbon tank pass through the atmosphere mouth filter.

As an optimized technical scheme of the utility model, be provided with first spring between the top of first valve and the interior roof of shell.

As an optimized technical scheme of the utility model, be provided with the second spring between the bottom of second valve and the interior diapire of shell.

(III) advantageous effects

Compared with the prior art, the utility model provides a two-way relief valve device of EVAP system possesses following beneficial effect:

this two-way relief valve device of EVAP system, the carbon tank of EVAP system is connected to one end, and CVS valve, DMTL or carbon tank lead to atmosphere mouth filter are connected to one end, and inside comprises first valve and second valve, simple structure, and convenient to use can release the too high malleation or the negative pressure of EVAP system, and the security is better.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a sectional view of the present invention;

FIG. 3 is an enlarged view of a portion A of FIG. 2 according to the present invention;

fig. 4 is an enlarged schematic view of the first valve portion of the present invention.

In the figure: 1-shell, 2-air outlet, 3-first interface, 4-second interface, 5-shelf, 6-first sealing ring, 7-first valve, 8-first spring, 9-second sealing ring, 10-second valve, 11-second spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-4, a two-way safety valve device of an EVAP system includes a housing 1, an air outlet 2 is disposed at the top of the housing 1, a first interface 3 is disposed at the left side of the housing 1, and a second interface 4 is disposed at the right side of the housing 1;

a shelf 5 is fixedly connected to the inner wall of the shell 1, a first sealing ring 6 is fixedly connected to the outer wall of the shelf 5, and a first valve 7 is movably connected to the top of the first sealing ring 6;

the bottom of the first valve 7 is fixedly connected with a second sealing ring 9, and the bottom of the second sealing ring 9 is movably connected with a second valve 10.

In this embodiment, the first interface 3 is connected to a carbon canister of the EVAP system, and the second interface 4 is connected to a CVS valve, a DMTL, or a carbon canister and passes through an atmosphere filter.

In this embodiment, a first spring 8 is arranged between the top of the first valve 7 and the inner top wall of the housing 1, when the positive pressure of the EVAP system is large in difference with the external air pressure, the first valve 7 is under the action of the air pressure, when the strength of the air pressure exceeds the elastic force of the first spring 8, the first valve 7 and the second valve 10 integrally move upwards, a gap is generated between the first valve 7 and the first sealing ring 6, the excessive positive pressure of the EVAP system is released to the outside through the gap and the air outlet 2, and the excessive positive pressure of the EVAP system is released to descend.

In this embodiment, a second spring 11 is disposed between the bottom of the second valve 10 and the inner bottom wall of the outer casing 1, when the difference between the negative pressure of the EVAP system and the external air pressure is large, the second valve 10 is under the action of the air pressure, when the force of the air pressure exceeds the elastic force of the second spring 11, the second valve 10 moves downward, a gap is generated between the second valve 10 and the second sealing ring 9, the external air enters the EVAP system through the air outlet 2 and the gap to balance the pressure difference, and the excessive negative pressure of the EVAP system is released.

The utility model discloses a theory of operation and use flow:

the first interface 3 is connected with a carbon tank of the EVAP system, and the second interface 4 is connected with a CVS valve, a DMTL or the carbon tank and communicated with an atmosphere port filter;

under normal conditions, when the EVAP system is balanced with the external air pressure and has no pressure difference, or when the positive pressure or the negative pressure of the EVAP system is smaller than the external air pressure difference, the first valve 7 and the second valve 10 are firmly attached to the first sealing ring 6 and the second sealing ring 9 respectively under the elastic force action of the first spring 8 and the second spring 11, and no air flow leaks to the outside through the air outlet 2;

when the positive pressure of the EVAP system is larger than the external air pressure difference, the first valve 7 is under the action of the air pressure, when the force of the air pressure exceeds the elastic force of the first spring 8, the first valve 7 and the second valve 10 integrally move upwards, a gap is formed between the first valve 7 and the first sealing ring 6, the excessive positive pressure of the EVAP system is released to the outside through the gap and the air outlet 2, and the excessive positive pressure of the EVAP system is released to descend;

when the difference between the negative pressure of the EVAP system and the external air pressure is large, the second valve 10 is under the action of the air pressure, when the force of the air pressure exceeds the elastic force of the second spring 11, the second valve 10 moves downwards, a gap is formed between the second valve 10 and the second sealing ring 9, the external air enters the EVAP system through the air outlet 2 and the gap to balance the pressure difference, and the overhigh negative pressure of the EVAP system is released.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A two-way safety valve device of EVAP system, includes shell (1), its characterized in that: the top of the shell (1) is provided with an air outlet (2), the left side of the shell (1) is provided with a first connector (3), and the right side of the shell (1) is provided with a second connector (4);

a shelf (5) is fixedly connected to the inner wall of the shell (1), a first sealing ring (6) is fixedly connected to the outer wall of the shelf (5), and a first valve (7) is movably connected to the top of the first sealing ring (6);

the bottom fixedly connected with second sealing washer (9) of first valve (7), the bottom swing joint of second sealing washer (9) has second valve (10).

2. The EVAP system two-way safety valve assembly of claim 1, wherein: the first interface (3) is connected with a carbon tank of the EVAP system, and the second interface (4) is connected with a CVS valve, a DMTL or a carbon tank and passes through an atmosphere filter.

3. The EVAP system two-way safety valve assembly of claim 1, wherein: a first spring (8) is arranged between the top of the first valve (7) and the inner top wall of the shell (1).

4. The EVAP system two-way safety valve assembly of claim 1, wherein: and a second spring (11) is arranged between the bottom of the second valve (10) and the inner bottom wall of the shell (1).