EGR (exhaust gas recirculation) valve plate capable of being placed positively and negatively

Abstract

The utility model discloses an EGR (Exhaust Gas Recirculation) valve plate capable of being placed positively and negatively, which is arranged in a valve body throat through a valve body rotating shaft and comprises a front contact surface, a transition face is attached to the back face of the front face contact face, and a back face contact face is attached to the back face of the transition face. A mounting fixing hole is formed in the valve plate, and a fixing screw penetrating through the valve plate is arranged in the mounting fixing hole; a fixed mounting hole corresponding to the mounting fixing hole in position is formed in the rotating shaft, and the fixed mounting hole is matched with a fixing screw for use; the rotating shaft is provided with a mounting groove for the valve plate to penetrate through. The device has the advantages of being ingenious in structure, easy to operate and capable of reducing production cost and improving installation accuracy and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of EGR valve technology, and more specifically to an EGR valve disc that can be placed in either direction. Background Technology

[0002] With the increasing market demand for range-extended and hybrid vehicles, the EGR valve, as a crucial component for improving combustion efficiency, is seeing its application and usage grow significantly. Currently, the production process of EGR valves places high demands on valve body flow rate and sealing performance, while the valve disc, as a key component, also faces stringent dimensional requirements and strict process control standards.

[0003] Existing conventional valve plates have only one contact surface, meaning they can only be placed in one direction during installation. In actual production, ensuring correct and reliable placement prevents automation. Furthermore, because there is only one contact bevel with sharp angles, the EGR valve nozzle wall is easily scratched during equipment operation. Reliable placement would require increased equipment investment; therefore, manual placement is currently the only option, increasing labor costs and the probability of incorrect placement (either facing forward or backward).

[0004] Therefore, there is an urgent need for an EGR valve disc that can be placed in either direction. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide an EGR valve disc that can be placed in both directions, so as to solve the problems in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0007] An EGR valve disc that can be placed in either direction is mounted inside the valve body's nozzle via a valve body pivot, so that it is in close contact with the nozzle wall when fully closed. The valve disc includes a front contact surface with an angled edge; a transition surface is attached to the back of the front contact surface, the edge of which has an angle that smoothly connects with the front contact surface; a reverse contact surface is attached to the back of the transition surface, the edge of which has an angled edge that is symmetrical to the front contact surface and smoothly connects with the transition surface; the valve disc has mounting holes, and a fixing screw passes through the valve disc; the pivot has mounting holes corresponding to the mounting holes, and the mounting holes are used with the fixing screws; the pivot has mounting grooves for the valve disc to pass through.

[0008] To further optimize the technical solution, a limited point is provided on the front contact surface, and the limited point is located at the position where the valve plate is tangent to the rotating shaft after installation.

[0009] To further optimize the technical solution, the height of the mounting and fixing hole is lower than the height of the limiting point.

[0010] To further optimize the technical solution, the fixing mounting hole is set at an angle to the thickness of the valve plate.

[0011] To further optimize the technical solution, the opening height of the fixing mounting hole on the front contact surface is higher than the opening height on the back contact surface.

[0012] The technological advancements achieved by this utility model are as follows, due to the adoption of the above technical solutions.

[0013] This invention provides a reversible EGR valve disc. By designing a specially structured front contact surface, transition surface, and back contact surface, it allows for placement without visual inspection of the disc's orientation, while still achieving valve function. This reduces the risk of scratching the valve head and valve wall, lowers worker error rates, and increases the possibility of automated production. This invention boasts advantages such as ingenious structure, simple operation, reduced production costs, and increased installation accuracy and efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the EGR valve with a rotating shaft installed inside the orifice wall in this utility model;

[0016] Figure 3 This is a schematic diagram of the front contact surface installation in this utility model;

[0017] Figure 4 This is a schematic diagram of the reverse contact surface installation in this utility model.

[0018] Among them: 1. Valve plate, 11. Front contact surface, 12. Back contact surface, 13. Transition surface, 14. Limiting point, 15. Mounting and fixing hole, 2. Rotary shaft, 21. Mounting groove, 22. Fixing mounting hole, 3. Roof wall, 4. Fixing screw. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] An EGR valve disc that can be placed in either direction, combined with Figures 1 to 4 As shown, it includes a front contact surface 11, a back contact surface 12, a transition surface 13, a limiting point 14, and a mounting hole 15.

[0021] The valve plate 1 is disposed inside the valve body orifice via the valve body pivot 2 so that it is in close contact with the valve body orifice wall 3 when the valve plate 1 is in the fully closed position.

[0022] The valve plate 1 includes a front contact surface 11, a transition surface 13, and a back contact surface 12 that are sequentially bonded together. The edge of the valve plate 1 is an outwardly convex arc shape. The edge of the front contact surface 11 has an angle, and the back of the front contact surface 11 is bonded to the transition surface 13. The edge of the transition surface 13 has an angle that smoothly connects with the front contact surface 11. The back of the transition surface 13 is bonded to the back of the back contact surface 12. The edge of the back contact surface 12 has an angle that is symmetrically arranged with the front contact surface 11, and the edge of the back contact surface 12 smoothly connects with the transition surface 13.

[0023] The front contact surface 11 of valve plate 1 is machined at the required angle to ensure tight contact between valve plate 1 and the EGR valve mantle wall 3 when fully closed. The back contact surface 12 of valve plate 1 is machined using the same process as the front contact surface 11 to ensure tight contact between valve plate 1 and the EGR valve mantle wall 3 when fully closed after reverse installation. The transition surface 13 of valve plate 1 is machined after the front contact surface 11 and the back contact surface 12, reducing the machining difficulty of the front contact surface 11 and the back contact surface 12, ensuring a good transition between the two contact surfaces, reducing machining burrs and other abnormal conditions, and reducing the risk of valve plate 1 getting stuck between the mantle wall 3 when fully closed.

[0024] The valve plate 1 has a mounting hole 15, and a fixing screw 4 is installed in the mounting hole 15 to pass through the valve plate 1. The rotating shaft 2 has a fixing hole 22 corresponding to the position of the mounting hole 15, for use with the fixing screw 4.

[0025] The rotating shaft 2 has an installation groove 21 for the valve plate 1 to pass through, and for the valve plate 1 to be installed and positioned.

[0026] A limiting point 14 is provided on the front contact surface 11. The limiting point 14 is located in the middle of the front contact surface 11 and is located at the position where the valve plate 1 is tangent to the rotating shaft 2 after installation, so as to ensure that the valve plate 1 can be quickly installed in place when it is installed.

[0027] The mounting hole 15 is located near the center of the front contact surface 11, and the height of the mounting hole 15 is lower than the height of the limiting point 14.

[0028] The mounting hole 22 is set at an angle to the thickness direction of the valve plate 1, and this angle is an acute angle.

[0029] The height of the opening of the mounting hole 22 on the front contact surface 11 is higher than the height of the opening on the back contact surface 12.

[0030] In practical use, the valve plate is first placed with the mounting groove 21 on the rotating shaft 2 facing upwards. Due to the limiting effect of the limiting point 14, the valve plate is in the correct position. At this time, the fixing mounting hole of the rotating shaft 2 is facing upwards, and then the position of the valve plate is finely adjusted so that the front contact surface can fit well against the gill wall. Then, the fixing screw 4 is inserted into the fixing mounting hole of the rotating shaft and tightened to fix the position of the valve plate. Because of the special design of this valve plate, no matter how the valve plate is placed, it can always be in the fully closed position, and the valve plate contact surface can fit well against the gill wall, realizing the function of EGR valve to control flow.

Claims

1. A reversible EGR valve flap (1) arranged in the valve body nozzle (4) by means of a valve body rotation axis (2) to be in close contact with the valve body nozzle wall (3) in the fully closed position of the flap (1), characterized in that: The valve piece (1) comprises a front contact surface (11) with an angle at the edge; a transition surface (13) is attached to the back of the front contact surface (11), and the edge of the transition surface (13) has an angle smoothly connected with the front contact surface (11); a back contact surface (12) is attached to the back of the transition surface (13), and the edge of the back contact surface (12) has an angle symmetrically arranged with the front contact surface (11) and smoothly connected with the transition surface (13); a mounting hole (15) is arranged on the valve piece (1), and a fixing screw (4) is arranged in the mounting hole (15) and penetrates the valve piece (1); a fixing mounting hole (22) corresponding to the mounting hole (15) is arranged on the rotating shaft (2), and the fixing mounting hole (22) is matched with the fixing screw (4); and a mounting groove (21) is arranged on the rotating shaft (2) and penetrates the valve piece (1).

2. The reversible EGR valve blade of claim 1, wherein: A limiting point (14) is arranged on the front contact surface (11), and the limiting point (14) is located at the tangent position of the valve piece (1) and the rotating shaft (2) after installation.

3. A reversible EGR valve blade according to claim 2, wherein: The height of the mounting hole (15) is lower than the height of the limiting point (14).

4. The reversible EGR valve blade of claim 1, wherein: The fixing mounting hole (22) is arranged at an angle with the thickness of the valve piece (1).

5. A reversible EGR valve blade according to claim 4, wherein: The opening height of the fixing mounting hole (22) on the front contact surface (11) is higher than the opening height on the back contact surface (12).

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