EGR one-way valve

Abstract

The utility model discloses an EGR one-way valve which comprises a valve body, a valve plate is movably connected in the valve body, a supporting rod is movably connected to the outer wall of the valve plate, and the supporting rod is installed in the valve body through an elastic mechanism. The elastic mechanism comprises a sliding block movably connected to the supporting rod, the sliding block slides on the outer wall of a sliding rod, the sliding rod is installed in a limiting groove, the limiting groove is formed in the inner wall of the valve body, the outer wall of the sliding block is connected with an elastic piece, the bottom end of the elastic piece is connected into the limiting groove, and the middle of the elastic piece surrounds the outer wall of the sliding rod. According to the design that the valve plate is matched with the elastic potential energy of the elastic piece, waste gas backflow is effectively prevented, and the reliability of the EGR system is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile engine exhaust gas recirculation system, especially relates to an EGR check valve. BACKGROUND

[0002] EGR systems are widely used in modern diesel engines and gasoline engines to reduce nitrogen oxide (NOx) emissions. By recirculating some exhaust gas into the intake manifold, the EGR system reduces combustion temperature and thus reduces the generation of NOx.

[0003] However, the existing EGR system may have exhaust gas backflow problems in some cases, which not only affects engine performance but also increases emissions pollution. INVENTION CONTENTS

[0004] The utility model discloses in view of the prior art existing problem, proposes the following technical scheme:

[0005] An EGR check valve includes a valve body, a valve plate movably connected inside the valve body, and a support rod movably connected to the outer wall of the valve plate. The support rod is installed inside the valve body through an elastic mechanism.

[0006] The valve plate cooperates with the elastic potential energy of the elastic member to effectively prevent exhaust gas backflow and improve the reliability of the EGR system.

[0007] As a preferred embodiment of the above technical solution, the elastic mechanism includes a sliding block movably connected to the support rod, and the sliding block slides on the outer wall of a sliding rod. The sliding rod is installed in a limiting groove, and the limiting groove is provided on the inner wall of the valve body. An elastic member is connected to the outer wall of the sliding block, and the bottom end of the elastic member is connected to the limiting groove. The elastic member surrounds the outer wall of the sliding rod in the middle.

[0008] Under the action of pressure, the gas impacts the valve plate. With the elastic potential energy of the elastic member, the sliding action of the sliding block on the sliding rod, and the support action of the support rod, the valve plate opens inwardly, ensuring the gas flow efficiency. When exhaust gas backflow occurs, the valve plate is in a closed state inside the valve body, which physically prevents exhaust gas backflow.

[0009] As a preferred embodiment of the above technical solution, a sealing block is inserted into the outer wall of the valve plate, and the sealing block is installed on a limiting plate. The limiting plate is installed at the bottom end of an abutting block, and the abutting block is installed on the inner wall of the valve body.

[0010] When the gas in the valve body does not flow, the valve plate closes the passage in the valve body under the hinging effect, the sealing block is inserted on the valve plate, under the effect of the inclined surface of the abutting block and the abutting effect of the limiting plate, the sealing efficiency of closing the passage in the valve body is further completed in cooperation with the valve plate, and the situation that the exhaust gas flows back is further prevented.

[0011] As the preferred technical scheme, the outer wall of the valve plate abuts on the abutting pad, the abutting pad is installed on the abutting plate, the abutting plate is connected to the inner wall of the valve body, and the position of the abutting plate horizontally corresponds to the position of the limiting plate in the valve body.

[0012] The utility model discloses the beneficial effects are:

[0013] In the application, under the design that the valve plate cooperates with the elastic potential of the elastic member, the exhaust gas backflow is effectively prevented, and the reliability of the EGR system is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The front view structure schematic diagram provided by the utility model embodiment shown provides;

[0015] Figure 2 The utility model embodiment shown provides Figure 1 The internal structure schematic diagram of valve body;

[0016] Figure 3 The utility model embodiment shown provides Figure 2 The enlarged structure schematic diagram of A in the valve body;

[0017] Legend:

[0018] 1, valve body;2, valve plate;3, abutting block;4, sealing block;5, limiting plate;6, support rod;7, sliding block;8, slide rod;9, elastic member;10, limiting groove;11, abutting pad;12, abutting plate. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantage of the utility model embodiment more clear, the utility model technical scheme will be described clearly and completely in connection with the embodiment.

[0020] The application is aimed at the problem of exhaust gas backflow in the prior art, under the design that the valve plate 2 cooperates with the elastic potential of the elastic member 9, the exhaust gas backflow is effectively prevented, and the reliability of the EGR system is improved.

[0021] As Figure 1 , Figure 2 and Figure 3As shown, the utility model discloses a kind of EGR check valve, including valve body 1;Valve body 1 is movably connected with valve plate 2, and the outer wall of valve plate 2 is movably connected with support rod 6, and support rod 6 is installed in the inside of valve body 1 by elastic mechanism;Gas is impacted valve plate 2 under the action of pressure, cooperate the supporting effect of elastic mechanism and support rod 6, so that in valve body 1 open valve plate 2, guarantee gas flow efficiency, while in the case of exhaust gas backflow, since valve plate 2 in valve body 1 is in closed state at this time, so that in the physical sense, place exhaust gas backflow condition occurs;Wherein it is worth mentioning that the connection mode of valve plate 2 and support rod 6 movably connected in valve body 1, as shown in the place Figure 2 As shown, by hinged connection mode, so that valve plate 2 is impacted again, guarantee gas flow efficiency.

[0022] As shown in Figure 2 And Figure 3 As shown, elastic mechanism includes sliding block 7 movably connected on support rod 6, and sliding block 7 is slid on the outer wall of slide rod 8, and slide rod 8 is installed in limiting groove 10, and limiting groove 10 is opened in the inner wall of valve body 1, and the outer wall of sliding block 7 is connected with elastic member 9, and the bottom end of elastic member 9 is connected in limiting groove 10, and the middle part of elastic member 9 is surrounded on the outer wall of slide rod 8;Gas is impacted valve plate 2 under the action of pressure, cooperate the elastic potential of elastic member 9, the sliding effect of sliding block 7 on slide rod 8 and the supporting effect of support rod 6, and valve plate 2 opens to the inside of valve body 1, guarantee gas flow efficiency, while in the case of exhaust gas backflow, since valve plate 2 in valve body 1 is in closed state at this time, so that in the physical sense, place exhaust gas backflow condition occurs;The outer wall of valve plate 2 is inserted with sealing block 4, and sealing block 4 is installed on limiting plate 5, and limiting plate 5 is installed on the bottom end of abutting block 3, and abutting block 3 is installed on the inner wall of valve body 1;When gas in valve body 1 does not flow, valve plate 2 closes the passage in valve body 1 under the action of hinging at this time, and sealing block 4 is inserted on valve plate 2 at this time, under the action of the inclined surface of abutting block 3 and the abutting effect of limiting plate 5, further cooperate valve plate 2 to complete the closed efficiency of valve body 1 passage closure, further guarantee that exhaust gas does not backflow condition occurs;The outer wall of valve plate 2 is abutted on abutting pad 11, and abutting pad 11 is installed on abutting plate 12, and abutting plate 12 is connected on the inner wall of valve body 1, and the position of abutting plate 12 and the position of limiting plate 5 correspond horizontally in valve body 1;Under the protection of abutting pad 11, avoid valve plate 2 and abutting plate 12 direct impact to cause damage, and under the cooperation of abutting plate 12, so that avoid valve plate 2 and valve body 1 hinged connection position place exhaust gas leakage condition occurs, in the physical sense, carry out blocking.

[0023] The above embodiments are only used to illustrate the technical scheme of the utility model, rather than limit it.

Claims

1. An EGR non-return valve comprising a valve body (1), characterised in that: The valve body (1) is movably connected with a valve plate (2), and the outer wall of the valve plate (2) is movably connected with a supporting rod (6), and the supporting rod (6) is installed on the inside of the valve body (1) through an elastic mechanism; The elastic mechanism comprises a sliding block (7) movably connected with the supporting rod (6), and the sliding block (7) slides on the outer wall of a sliding rod (8), and the sliding rod (8) is installed in a limiting groove (10) which is formed on the inner wall of the valve body (1), and the outer wall of the sliding block (7) is connected with an elastic member (9), and the bottom end of the elastic member (9) is connected in the limiting groove (10), and the middle part of the elastic member (9) is surrounded on the outer wall of the sliding rod (8).

2. An EGR check valve according to claim 1, wherein The outer wall of the valve plate (2) is inserted with a sealing block (4), and the sealing block (4) is installed on a limiting plate (5), and the limiting plate (5) is installed on the bottom end of an abutting block (3), and the abutting block (3) is installed on the inner wall of the valve body (1).

3. The EGR check valve of claim 1, wherein The outer wall of the valve plate (2) abuts on an abutting pad (11), and the abutting pad (11) is installed on an abutting plate (12), and the abutting plate (12) is connected on the inner wall of the valve body (1), and the position of the abutting plate (12) horizontally corresponds to the position of the limiting plate (5) in the valve body (1).

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