Integrated double-end one-way valve

Abstract

The utility model discloses an integrated double-end one-way valve which comprises a main valve seat, an upper valve seat and a lower valve seat. The upper valve seat and the lower valve seat are symmetrically installed on the main valve seat. The main body valve seat comprises an air inlet connecting pipe and an air outlet port; the upper valve seat comprises a first connecting seat and a first air outlet connecting pipe. The lower valve seat comprises a second connecting seat and a second air outlet connecting pipe. An O-shaped ring I and an O-shaped ring II are respectively arranged between the connecting seat I and the air outlet port at the corresponding end and between the connecting seat II and the air outlet port at the corresponding end; a diaphragm I and a diaphragm II are respectively arranged between the connecting seat I and the connecting seat II and the air outlet ports at the corresponding ends; and an inner convex ring and an outer convex ring corresponding to the diaphragm I and the diaphragm II are respectively arranged on the radial inner side and the radial outer side of the annular air outlet holes of the air outlet ports. According to the utility model, the O-shaped ring is additionally arranged at the welding part of the connecting seat and the air outlet port, so that poor performance of air leakage of a product caused by cold solder joint of the product is prevented; and the inner convex ring and the outer convex ring can prevent the diaphragm from moving up and down to cause unstable product performance or failure, so that the reverse sealing performance is better.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to an integrated double-head one-way valve. Background Art

[0002] Under normal circumstances, the gasoline in a car's fuel tank will evaporate, and the volatility will intensify as the temperature rises. If the evaporated gasoline vapor is directly discharged into the atmosphere, it will pollute the environment and pose a safety hazard.

[0003] In order to avoid environmental pollution and safety hazards caused by direct discharge of volatile gasoline vapor in the fuel tank and implement the latest National VI Standard, the existing technology uses the good adsorption capacity of activated carbon to develop a carbon canister for temporary storage of gasoline vapor. When the engine is working, the gasoline vapor stored in the carbon canister is sent into the engine cylinder to be burned by opening the carbon canister solenoid valve, thereby protecting the environment and saving fuel costs. Based on the above requirements, the supercharged engine needs to be equipped with two desorption circuits, one is low-pressure desorption, and the low-pressure circuit plays a desorption role when the engine is idling; the other is high-pressure desorption. When the supercharger intervenes, the compressed air after supercharging is used to drive the venturi tube to achieve oil and gas desorption. Therefore, in order to prevent the airflows of the two circuits from affecting each other and to prevent the supercharged gas from flowing back into the carbon canister, a one-way valve needs to be installed on the high and low pressure circuits.

[0004] In the prior art, the patent with application number 202211042382.5 discloses an integrated one-way valve, wherein the valve seat 1 has an air inlet channel and two valve ports, and the air inlet channel is connected to the ventilation slits of the two valve ports through the inner cavity of the valve seat; the first valve housing 2 has a first connecting seat adapted to the valve port and a first air outlet channel, the first connecting seat is connected to the first air outlet channel, and the second valve housing 3 has a second connecting seat adapted to the valve port and a second air outlet channel, the second connecting seat is connected to the second air outlet channel; the first connecting seat and the second connecting seat are respectively sleeved on the two valve ports of the valve seat 1 to form two annular accommodating gaps, and the two diaphragms 4 and 5 are respectively fixed in the two annular accommodating gaps; the diaphragms 4 and 5 are annular, and the central through holes of the two annular diaphragms 4 and 5 are respectively sleeved on the limiting protrusions of the two valve ports, and the annular surfaces of the two annular diaphragms 4 and 5 respectively seal the ventilation slits of the two valve ports to separate the air inlet channel from the first air outlet channel and the air inlet channel from the second air outlet channel.

[0005] The integrated one-way valve disclosed in the above prior art integrates two one-way valves together, optimizes the internal structure of the product, and achieves low-cost and high-efficiency batch manufacturing to a greater extent while ensuring optimal performance, greatly saving mold costs and manufacturing costs, and improving product manufacturing efficiency. However, the above prior art still has the following shortcomings:

[0006] 1. There is no sealing ring for protection at the welding points between the first connecting seat of the first valve housing 2 and the second connecting seat of the second valve housing 3 and the valve seat 1. If a cold weld occurs, the product performance will be seriously affected;

[0007] 2. The diaphragms 4 and 5 corresponding to the two valve ports of the valve seat 1 are both circular and directly arranged in two annular accommodating gaps formed between the first connecting seat, the second connecting seat and the two valve ports of the valve seat 1. Since there is no other support, the diaphragms 4 and 5 are prone to move up and down due to the surplus space above and below in actual use, which may cause product failure or unstable product performance. Utility Model Content

[0008] In order to solve the above technical problems, the utility model provides an integrated double-head check valve, comprising a main valve seat, and an upper valve seat and a lower valve seat symmetrically installed on the main valve seat;

[0009] The main valve seat comprises an air inlet connecting pipe and an air outlet port symmetrically arranged along the axial direction of the air inlet connecting pipe and connected to the air inlet connecting pipe; each of the air outlet ports is provided with an annular air outlet hole connected to the air inlet connecting pipe;

[0010] The upper valve seat comprises a connection seat 1 connected to the gas outlet port at one end, and a gas outlet connection pipe 1 connected to the connection seat 1;

[0011] The lower valve seat comprises a second connection seat connected to the gas outlet port at the other end side, and a second gas outlet connection pipe connected to the second connection seat;

[0012] An O-ring 1 is provided between the radial inner side of the connecting seat 1 and the radial outer side of the gas outlet port at the corresponding end;

[0013] An O-ring 2 is provided between the radial inner side of the second connecting seat and the radial outer side of the corresponding end of the gas outlet port;

[0014] A diaphragm 1 is arranged between the air inlet of the connecting seat 1 and the air outlet of the corresponding end of the air outlet port, and an inner convex ring and an outer convex ring corresponding to the diaphragm 1 are respectively arranged on the radial inner side and the radial outer side of the annular air outlet hole of the air outlet port;

[0015] A diaphragm 2 is arranged between the air inlet of the second connecting seat and the air outlet of the corresponding end of the air outlet port, and an inner convex ring and an outer convex ring corresponding to the diaphragm 2 are respectively arranged on the radial inner side and radial outer side of the annular air outlet hole of the air outlet port.

[0016] Wherein, the height of the outer convex ring is greater than the height of the inner convex ring.

[0017] Among them, annular grooves corresponding to the O-ring 1 and the O-ring 2 are respectively arranged on the radial outer sides of the air outlet ports at both ends, and the O-ring 1 and the O-ring 2 are respectively clamped in the annular grooves at the corresponding ends.

[0018] Through the above technical solution, the utility model has the following beneficial effects:

[0019] 1. Add an O-ring at the welding point between the connection seat and the air outlet port to prevent poor performance of the product caused by poor welding;

[0020] 2. Add limiting inner and outer convex rings in the diaphragm sealing area to prevent the diaphragm from moving up and down, which may cause unstable product performance or failure, and improve the reverse sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of a double-headed one-way valve disclosed in an embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the cross-sectional exploded structure of a double-ended one-way valve disclosed in an embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram of the cross-sectional assembly structure of a double-ended one-way valve disclosed in an embodiment of the utility model;

[0025] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of part A in the middle.

[0026] The numbers in the figure indicate: 10. Main valve seat; 11. Air outlet port; 111. Inner convex ring; 112. Outer convex ring; 113. Annular groove; 114. Annular air outlet hole; 12. Air inlet connecting pipe; 20. Upper valve seat; 21. Connecting seat one; 22. Air outlet connecting pipe one; 30. O-ring one; 40. Diaphragm one; 50. Lower valve seat; 51. Connecting seat two; 52. Air outlet connecting pipe two; 60. O-ring two; 70. Diaphragm two. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] refer to Figure 1-4, the present embodiment provides an integrated double-headed one-way valve, comprising a main valve seat 10, and an upper valve seat 20 and a lower valve seat 50 symmetrically mounted on the main valve seat 10; the main valve seat 10 comprises an air inlet connecting pipe 12, and an air outlet port 11 symmetrically arranged along the axial direction of the air inlet connecting pipe 12 and connected to the air inlet connecting pipe 12; the air outlet ports 11 are each provided with an annular air outlet hole 114 connected to the air inlet connecting pipe 12; the upper valve seat 20 comprises a connecting seat 1 21 connected to the air outlet port 11 at one end, and an air outlet connecting pipe 1 22 connected to the connecting seat 1 21; the lower valve seat 50 comprises a connecting seat 2 51 connected to the air outlet port 11 at the other end, and an air outlet connecting pipe 2 52 connected to the connecting seat 2 51.

[0029] Among them, an O-ring 1 30 is arranged between the radial inner side of the connecting seat 1 21 and the radial outer side of the corresponding end outlet port 11; an O-ring 2 60 is arranged between the radial inner side of the connecting seat 2 51 and the radial outer side of the corresponding end outlet port 11; an annular groove 113 corresponding to the O-ring 1 30 and the O-ring 2 60 is respectively arranged on the radial outer sides of the outlet ports 11 at both ends, and the O-ring 1 30 and the O-ring 2 60 are respectively clamped in the annular groove 113 at the corresponding ends.

[0030] Among them, a diaphragm 1 40 is arranged between the air inlet of the connecting seat 1 21 and the air outlet of the corresponding end air outlet port 11, and the inner convex ring 111 and the outer convex ring 112 corresponding to the diaphragm 1 40 are respectively arranged on the radial inner side and the radial outer side of the annular air outlet hole 114 of the air outlet port 11; a diaphragm 2 70 is arranged between the air inlet of the connecting seat 2 51 and the air outlet of the corresponding end air outlet port 11, and the inner convex ring 111 and the outer convex ring 112 corresponding to the diaphragm 2 70 are respectively arranged on the radial inner side and the radial outer side of the annular air outlet hole 114 of the air outlet port 11; the height of the outer convex ring 112 is greater than the height of the inner convex ring 111.

[0031] The utility model can effectively prevent poor product performance caused by product poor welding by adding O-ring 1 30 and O-ring 2 60 at the welding points of the air outlet ports of connecting seat 1 21 and connecting seat 2 51 respectively; and can effectively prevent the diaphragm 1 40 and diaphragm 2 70 from moving up and down to cause unstable product performance or failure by adding limiting inner convex ring 111 and outer convex ring 112 in the sealing area of ​​diaphragm 1 40 and diaphragm 2 70, so as to improve the reverse sealing performance.

[0032] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to the above embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An integrated double-head check valve, comprising a main valve seat (10), and an upper valve seat (20) and a lower valve seat (50) symmetrically mounted on the main valve seat (10); The main valve seat (10) comprises an air inlet connecting pipe (12), and an air outlet port (11) symmetrically arranged along the axial direction of the air inlet connecting pipe (12) and connected to the air inlet connecting pipe (12); each of the air outlet ports (11) is provided with an annular air outlet hole (114) connected to the air inlet connecting pipe (12); The upper valve seat (20) comprises a connecting seat 1 (21) connected to the gas outlet port (11) at one end, and a gas outlet connecting pipe 1 (22) connected to the connecting seat 1 (21); The lower valve seat (50) comprises a second connection seat (51) connected to the gas outlet port (11) at the other end, and a second gas outlet connection pipe (52) connected to the second connection seat (51); Features: An O-ring (30) is provided between the radial inner side of the connecting seat (21) and the radial outer side of the corresponding end of the gas outlet port (11); An O-ring 2 (60) is provided between the radial inner side of the second connecting seat (51) and the radial outer side of the corresponding end gas outlet port (11); A diaphragm (40) is provided between the air inlet of the connecting seat (21) and the air outlet of the corresponding end air outlet port (11), and an inner convex ring (111) and an outer convex ring (112) corresponding to the diaphragm (40) are respectively provided on the radial inner side and the radial outer side of the annular air outlet hole (114) of the air outlet port (11); A diaphragm 2 (70) is arranged between the air inlet of the second connecting seat (51) and the air outlet of the corresponding end air outlet port (11), and an inner convex ring (111) and an outer convex ring (112) corresponding to the diaphragm 2 (70) are respectively arranged on the radial inner side and radial outer side of the annular air outlet hole (114) of the air outlet port (11).

2. An integrated double-head check valve according to claim 1, characterized in that: The height of the outer convex ring (112) is greater than the height of the inner convex ring (111).

3. The integrated double-head check valve according to claim 1, characterized in that: Annular grooves (113) corresponding to the O-ring 1 (30) and the O-ring 2 (60) are respectively arranged on the radial outer sides of the air outlet ports (11) at both ends, and the O-ring 1 (30) and the O-ring 2 (60) are respectively clamped in the annular grooves (113) at the corresponding ends.

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