EGR (Exhaust Gas Recirculation) valve with sealing protection device

Abstract

The utility model discloses an EGR (Exhaust Gas Recirculation) valve with a sealing protection device, which relates to the technical field of EGR valves and comprises a valve body, a vacuum connecting pipe, a contraction mechanism arranged on the valve body, a central valve rod, an exhaust gas backflow space, a fixed plate, a rotating mechanism arranged on the fixed plate, a carbon scraping plate, an elastic sealing plug and a cooling component arranged on the valve body, through cooperation of a contraction mechanism, a center valve rod, a fixing plate, a rotating mechanism, a carbon scraping plate and an elastic sealing plug, when a waste gas inlet is opened or closed, the center valve rod drives the carbon scraping plate to rotate along the inner wall of the valve body through the rotating mechanism, the inner wall of the valve body is cleaned, soot particles are prevented from being deposited on the inner wall of the valve body, and the service life of the valve body is prolonged. Formation of coke deposits is prevented, so that complete closing of the valve is not hindered, and sealing failure is avoided; the gas entering the valve body is cooled through the cooling assembly, and the influence of the temperature on the elastic sealing plug is reduced, so that the service life is prolonged, and the sealing protection effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of EGR valve technology, and in particular to an EGR valve with a sealing protection device. Background Technology

[0002] The EGR valve is an important component in the emission control system of automotive engines. It is mainly used to reduce nitrogen oxide emissions by reintroducing a portion of the burned exhaust gas into the engine intake system, where it mixes with fresh air and re-enters the cylinder for combustion.

[0003] However, carbon soot particles in the exhaust gas deposit on the inner wall of the valve body, easily forming a layer of coke deposits, which hinders the valve from closing completely and leads to sealing failure. Therefore, improvements are urgently needed. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an EGR valve with a sealing protection device, which aims to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An EGR valve with a sealing protection device includes a valve body and a vacuum connection, and further includes:

[0007] A retraction mechanism is provided on the valve body;

[0008] A central valve stem is mounted on the retraction mechanism;

[0009] An exhaust gas recirculation space is provided on the valve body;

[0010] A fixing plate is disposed on the valve body and is fixedly connected to the valve body;

[0011] A rotating mechanism is mounted on the fixed plate;

[0012] Two carbon scraper plates are provided, and the two carbon scraper plates are mounted on the rotating mechanism;

[0013] An elastic sealing plug is disposed on the central valve stem and is fixedly connected to the central valve stem;

[0014] A cooling component, disposed on the valve body, is used to reduce the temperature of the exhaust gas inlet of the valve body.

[0015] Preferably, the retraction mechanism includes:

[0016] A spring is disposed on the valve body, and one end of the spring is fixedly connected to the valve body;

[0017] A movable plate is mounted on the spring and fixedly connected to the other end of the spring; the movable plate is also fixedly connected to the central valve stem.

[0018] A diaphragm is disposed on the valve body and fixedly connected to the valve body, and the diaphragm is fixedly connected to the movable plate.

[0019] Preferably, the rotating mechanism includes:

[0020] A rotating ring is disposed on the fixed plate and is rotatably connected to the fixed plate;

[0021] Two Z-shaped connecting plates are provided, which are symmetrically arranged on the rotating ring and fixedly connected to the rotating ring. The Z-shaped connecting plates are also fixedly connected to the carbon scraper plate.

[0022] A sliding plate is disposed on the rotating ring and fixedly connected to the rotating ring. The sliding plate is slidably connected to the central valve stem.

[0023] Preferably, the central valve stem is provided with a built-in threaded groove to provide a sliding trajectory for the sliding plate.

[0024] Preferably, the cooling assembly includes:

[0025] A cooling cone plate is disposed on the valve body and fixedly connected to the valve body;

[0026] A coolant inlet is provided on the cooling cone plate for injecting coolant into the cooling cone plate;

[0027] A coolant outlet is provided on the cooling cone plate for discharging coolant from the cooling cone plate.

[0028] Preferably, a limiting post is fixed on the valve body, and the limiting post is slidably connected to the central valve stem to limit the movement position of the central valve stem.

[0029] Preferably, a vacuum chamber is provided in the valve body, located between the valve body, the movable plate and the diaphragm.

[0030] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0031] Through the coordination of the contraction mechanism, central valve stem, fixed plate, rotating mechanism, carbon scraper, and elastic sealing plug, when the exhaust gas inlet is opened or closed, the central valve stem drives the carbon scraper to rotate along the inner wall of the valve body via the rotating mechanism, thereby cleaning the inner wall of the valve body, preventing carbon soot particles from depositing on the inner wall of the valve body, and preventing the formation of a layer of coke deposits. This does not hinder the complete closure of the valve and avoids sealing failure. The cooling component cools the gas entering the valve body through the exhaust gas inlet, reducing the temperature impact on the elastic sealing plug, thereby extending its service life and providing sealing protection. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 A three-dimensional structural schematic diagram of an EGR valve with a sealing protection device is shown.

[0034] Figure 2 It shows Figure 1 A frontal sectional view.

[0035] Figure 3 It shows Figure 1 Side view sectional view.

[0036] Figure 4 It shows Figure 1 A partial three-dimensional structural diagram.

[0037] Figure 5 It shows Figure 4 An explosion diagram.

[0038] Legend:

[0039] 1. Valve body; 2. Vacuum connector; 3. Central valve stem; 4. Waste gas recirculation space; 5. Fixed plate; 6. Carbon scraper; 7. Elastic sealing plug; 8. Spring; 9. Moving plate; 10. Diaphragm; 11. Rotating ring; 12. Z-shaped connecting plate; 13. Sliding clamping plate; 14. Internal threaded groove; 15. Cooling conical plate; 16. Coolant inlet; 17. Coolant outlet; 18. Limiting column; 19. Vacuum chamber. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0041] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] Reference Figures 1 to 5 The present invention provides a further description of an embodiment of an EGR valve with a sealing protection device.

[0045] An EGR valve with a sealing protection device includes a valve body 1 and a vacuum connector 2, the vacuum connector 2 being fixedly mounted on the valve body 1. A limiting post 18 is fixedly mounted on the valve body 1, the limiting post 18 being slidably connected to a central valve stem 3 to limit the movement of the central valve stem 3. A vacuum chamber 19 is provided inside the valve body 1, located between the valve body 1, the moving plate 9, and the diaphragm 10. It also includes:

[0046] Reference Figure 2, Figure 4 and Figure 5 In a preferred embodiment, a retraction mechanism is disposed on the valve body 1; the retraction mechanism includes:

[0047] A spring 8 is disposed on the valve body 1, and one end of the spring 8 is fixedly connected to the valve body 1;

[0048] A movable plate 9 is mounted on the spring 8 and fixedly connected to the other end of the spring 8. The movable plate 9 is fixedly connected to the central valve stem 3.

[0049] A diaphragm 10 is disposed on the valve body 1 and fixedly connected to the valve body 1. The diaphragm 10 is also fixedly connected to the movable plate 9.

[0050] A central valve stem 3 is disposed on the retraction mechanism; the central valve stem 3 is provided with a built-in threaded groove 14 for providing a sliding trajectory for the sliding plate 13.

[0051] During operation, a vacuum pump connected to the outside is used via vacuum connector 2 to extract air from the vacuum chamber 19, thereby causing the moving plate 9 to move upward and compressing the spring 8. The diaphragm 10 serves as an isolation device to prevent gas from escaping from the valve body 1 into the vacuum chamber 19. The moving plate 9 also drives the central valve stem 3 to move upward, thereby causing the elastic sealing plug 7 to move upward and opening the valve. The central valve stem 3 also drives the sliding plate 13 to rotate around its axial direction, thereby rotating the rotating mechanism. When the vacuum pump is turned off, the spring 8 releases its elastic potential energy, causing the moving plate 9 to move downward. The moving plate 9 then drives the central valve stem 3 to move downward, and the central valve stem 3 drives the sliding plate 13 to rotate.

[0052] The exhaust gas recirculation space 4 is provided on the valve body 1;

[0053] A fixing plate 5 is disposed on the valve body 1 and fixedly connected to the valve body 1; it is used to limit the position of the rotating ring 11, thereby activating the rotation position of the limiting rotation mechanism.

[0054] Reference Figures 2 to 5 In a preferred embodiment, a rotating mechanism is disposed on the fixed plate 5; the rotating mechanism includes:

[0055] A rotating ring 11 is disposed on the fixed plate 5 and is rotatably connected to the fixed plate 5;

[0056] Two Z-shaped connecting plates 12 are provided. The two Z-shaped connecting plates 12 are symmetrically arranged on the rotating ring 11 and fixedly connected to the rotating ring 11. The Z-shaped connecting plates 12 are fixedly connected to the carbon scraper plate 6.

[0057] A sliding plate 13 is disposed on the rotating ring 11 and fixedly connected to the rotating ring 11. The sliding plate 13 is slidably connected to the central valve stem 3.

[0058] Two carbon scraper plates 6 are provided, and the two carbon scraper plates 6 are disposed on the rotating mechanism;

[0059] During operation, the central valve stem 3 moves upward, causing the sliding plate 13 to move along the built-in threaded groove 14 on the central valve stem 3, thereby achieving the rotation of the sliding plate 13. The sliding plate 13 drives the rotating ring 11 to rotate on the fixed plate 5, and the rotating ring 11 drives the Z-shaped connecting plate 12 to rotate. The Z-shaped connecting plate 12 drives the scraper plate 6 to rotate along the inner wall of the valve body 1. When the central valve stem 3 moves downward, the central valve stem 3 drives the sliding plate 13 to rotate, and the sliding plate 13 drives the rotating ring 11 to rotate. The rotating ring 11 drives the scraper plate 6 to rotate through the Z-shaped connecting plate 12. The central valve stem 3 also drives the elastic sealing plug 7 to move downward, thereby closing the valve. This achieves the cleaning of the inner wall of the valve body 1 and prevents carbon soot particles from depositing on the inner wall of the valve body 1.

[0060] An elastic sealing plug 7 is disposed on the central valve stem 3 and fixedly connected to the central valve stem 3; it is used to control the conduction state of the flow channel.

[0061] Reference Figure 1 and Figure 3 In a preferred embodiment, a cooling assembly is disposed on the valve body 1 to reduce the temperature of the exhaust gas inlet of the valve body 1. The cooling assembly includes:

[0062] A cooling cone plate 15 is disposed on the valve body 1 and fixedly connected to the valve body 1;

[0063] A coolant inlet 16 is provided on the cooling cone plate 15 for injecting coolant into the cooling cone plate 15;

[0064] Coolant outlet 17 is provided on the cooling cone plate 15 for discharging coolant from the cooling cone plate 15.

[0065] During operation, coolant is manually injected into the cooling cone plate 15 through the coolant inlet 16. The coolant injected into the cooling cone plate 15 is discharged through the coolant outlet 17, realizing the circulation of coolant. The cooling cone plate 15 cools the gas entering the valve body 1, reducing the temperature impact on the elastic sealing plug 7, thereby extending the service life of the elastic sealing plug 7 and providing sealing protection for the valve body 1.

[0066] Working principle: By manually connecting the vacuum pipe 2 to an external vacuum pump, air is extracted from the vacuum chamber 19, causing the moving plate 9 to move upward and compressing the spring 8. The moving plate 9 also drives the central valve stem 3 upward, which in turn drives the elastic sealing plug 7 upward, thus opening the valve. The upward movement of the central valve stem 3 causes the sliding plate 13 to move along the built-in threaded groove 14 on the central valve stem 3, thereby rotating the sliding plate 13. The sliding plate 13 drives the rotating ring 11 to rotate on the fixed plate 5, which in turn drives the Z-shaped connecting plate 12 to rotate. The Z-shaped connecting plate 12 drives the carbon scraper 6 to rotate along the inner wall of the valve body 1, thereby cleaning the inner wall of the valve body 1 and preventing carbon soot particles from depositing on the inner wall of the valve body 1. The coolant is manually supplied through... Coolant is injected into the cooling cone plate 15 through the coolant inlet 16 and discharged through the coolant outlet 17, thus achieving coolant circulation. The cooling cone plate 15 cools the gas entering the valve body 1, reducing the temperature effect on the elastic sealing plug 7, thereby extending the service life of the elastic sealing plug 7 and providing sealing protection for the valve body 1. When the vacuum pump is turned off, the spring 8 releases its elastic potential energy to drive the moving plate 9 to move downward. The moving plate 9 drives the central valve stem 3 to move downward. The central valve stem 3 drives the sliding plate 13 to rotate. The sliding plate 13 drives the rotating ring 11 to rotate. The rotating ring 11 drives the scraper plate 6 to rotate through the Z-shaped connecting plate 12, thereby cleaning the inner wall of the valve body 1. The central valve stem 3 is also used to drive the elastic sealing plug 7 to move downward, thereby closing the valve.

[0067] The above description of the embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily 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 is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An EGR valve with a sealing protection device, comprising a valve body (1) and a vacuum connector (2), characterized in that, Also includes: A retraction mechanism is provided on the valve body (1); The central valve stem (3) is mounted on the retraction mechanism; The exhaust gas recirculation space (4) is provided on the valve body (1); A fixing plate (5) is disposed on the valve body (1) and fixedly connected to the valve body (1); A rotating mechanism is mounted on the fixed plate (5); Two carbon scraper plates (6) are provided, and the two carbon scraper plates (6) are arranged on the rotating mechanism; An elastic sealing plug (7) is disposed on the central valve stem (3) and fixedly connected to the central valve stem (3); A cooling component is disposed on the valve body (1) for reducing the temperature of the exhaust gas inlet of the valve body (1).

2. The EGR valve with a sealing protection device according to claim 1, characterized in that, The shrinkage mechanism includes: A spring (8) is disposed on the valve body (1), and one end of the spring (8) is fixedly connected to the valve body (1); A movable plate (9) is mounted on the spring (8) and fixedly connected to the other end of the spring (8). The movable plate (9) is fixedly connected to the central valve stem (3). A diaphragm (10) is disposed on the valve body (1) and fixedly connected to the valve body (1). The diaphragm (10) is fixedly connected to the movable plate (9).

3. An EGR valve with a sealing protection device according to claim 2, characterized in that, The rotating mechanism includes: A rotating ring (11) is disposed on the fixed plate (5) and is rotatably connected to the fixed plate (5); Two Z-shaped connecting plates (12) are provided. The two Z-shaped connecting plates (12) are symmetrically arranged on the rotating ring (11) and fixedly connected to the rotating ring (11). The Z-shaped connecting plates (12) are fixedly connected to the carbon scraper (6). A sliding plate (13) is disposed on the rotating ring (11) and fixedly connected to the rotating ring (11). The sliding plate (13) is slidably connected to the central valve stem (3).

4. An EGR valve with a sealing protection device according to claim 3, characterized in that, The central valve stem (3) is provided with a built-in threaded groove (14) for providing a sliding trajectory for the sliding plate (13).

5. An EGR valve with a sealing protection device according to claim 4, characterized in that, The cooling assembly includes: A cooling cone plate (15) is disposed on the valve body (1) and fixedly connected to the valve body (1); A coolant inlet (16) is provided on the cooling cone plate (15) for injecting coolant into the cooling cone plate (15); A coolant outlet (17) is provided on the cooling cone plate (15) for discharging coolant from the cooling cone plate (15).

6. An EGR valve with a sealing protection device according to claim 5, characterized in that, A limiting post (18) is fixed on the valve body (1). The limiting post (18) is slidably connected to the central valve stem (3) to limit the movement position of the central valve stem (3).

7. An EGR valve with a sealing protection device according to claim 6, characterized in that, The valve body (1) has a vacuum chamber (19) located between the valve body (1), the moving plate (9) and the diaphragm (10).

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