EGR (Exhaust Gas Recirculation) valve reliable in sealing

Abstract

The utility model relates to the technical field of EGR valves, in particular to an EGR valve reliable in sealing. A second L-shaped groove and a first L-shaped groove are located on the same horizontal line, one end of a driving mechanism penetrates through a valve body and is provided with a first valve plate, a transmission block is hinged to a first connecting block through a first rotating shaft, a second valve plate is arranged above a third mounting block, and a second valve plate is arranged above a second mounting block. And a fixing device is arranged on the lower surface of the second valve plate. When air closing is needed, a driving mechanism is started firstly, a rotating shaft of the driving mechanism rotates clockwise, a transmission block pulls a fixing device to move downwards, a second valve plate is stably pressed on a third mounting block, a first sealing guarantee is achieved, meanwhile, the first valve plate is tightly attached to a first L-shaped groove, a second L-shaped groove is tightly attached to the first L-shaped groove, and the first valve plate is tightly attached to the second L-shaped groove. Gas enters from the gas inlet and applies pressure to the lower end of the first valve plate, so that the first valve plate is further attached to the first L-shaped groove and the second L-shaped groove, and the sealing effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of EGR valves, in particular to an EGR valve with reliable sealing. Background Art

[0002] The EGR valve (exhaust gas recirculation valve) is a mechatronic product installed on a diesel engine to control the amount of exhaust gas recirculation fed back to the intake system. The EGR valve is a mechatronic product installed on a diesel engine to control the amount of exhaust gas recirculation fed back to the intake system. It is usually located on the right side of the intake manifold, close to the throttle body, and is connected to a short metal pipe leading to the exhaust manifold. Its function is to control the amount of exhaust gas entering the intake manifold, so that a certain amount of exhaust gas flows into the intake manifold for recirculation. The EGR valve is a very important and key component in the exhaust gas recirculation device.

[0003] For example, the electric EGR valve with reliable sealing, with the authorization announcement number "CN217055413U", solves the problem of poor sealing effect of the existing EGR valve, which is prone to gas leakage during use and inconvenient for users, by setting up aluminum silicate fiber layer, flame-retardant aluminum foil cloth layer and natural resin layer. However, no sealing measures are set inside the valve body, and there is still a risk of leakage. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes an EGR valve with reliable sealing.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An EGR valve with reliable sealing is designed, comprising a valve body, a cavity is provided inside the valve body, an air inlet and an air outlet are provided on the surface of the valve body, the air inlet and the air outlet are both connected to the cavity, a first mounting block is provided on the inner wall of one side of the cavity, a first L-shaped groove is provided on one end of the first mounting block, a second mounting block is provided on the inner wall of one side of the cavity, a second L-shaped groove is provided on one end of the second mounting block, the second L-shaped groove and the first L-shaped groove are on the same horizontal line, a driving mechanism is provided on the surface of one side of the valve body, one end of the driving mechanism passes through the valve body and is provided with a first valve plate, the thickness of the first valve plate matches the first L-shaped groove and the second L-shaped groove, and the second L-shaped groove is provided on the inner wall of one side of the cavity. A first connecting block is provided on the upper surface of a valve plate, a transmission block is provided on the side of the first connecting block, the transmission block and the first connecting block are hingedly connected by a first rotating shaft, a third mounting block is provided on the inner wall of the cavity, a first through hole is provided on the surface of the third mounting block, a second valve plate is provided above the third mounting block, a fixing device is provided on the lower surface of the second valve plate, the fixing device and the transmission block are hingedly connected by a second rotating shaft, two second through holes are provided on the surface of the second valve plate, two limit blocks are provided on the upper surface of the third mounting block, the upper ends of the two limit blocks pass through the second through holes, fourth mounting blocks are provided on the inner walls on both sides of the cavity, and the upper ends of the limit blocks are connected to the lower surface of the fourth mounting block.

[0007] Preferably, the fixing device comprises an additional block, a second connecting block is provided on the lower surface of the additional block, and the second connecting block is hingedly connected to the transmission block via a second rotating shaft.

[0008] Preferably, the two limit blocks are externally sleeved with springs, the upper ends of the two springs are connected to the fourth mounting block, and the lower ends of the two springs are connected to the upper surface of the second valve plate.

[0009] Preferably, a plurality of positioning blocks are provided on the lower surface of the second valve plate, a plurality of positioning grooves are provided on the upper surface of the third mounting block, the plurality of positioning grooves correspond one-to-one to the plurality of positioning blocks, and the positioning grooves match the positioning blocks.

[0010] Preferably, two first sealing gaskets are provided on the lower surface of the second valve plate.

[0011] Preferably, a second sealing gasket is provided on the upper inner wall of the first L-shaped groove and the lower inner wall of the second L-shaped groove.

[0012] The EGR valve with reliable sealing proposed by the utility model has the beneficial effect that when it is necessary to close the air, the driving mechanism is first started, and the rotating shaft of the driving mechanism rotates clockwise, so that the transmission block pulls the fixing device to move downward, and then pulls the second valve plate to move downward along the limit block, so that the second valve plate is firmly pressed on the third mounting block, which plays a first sealing role. At the same time, the first valve plate fits tightly with the first L-shaped groove and the second L-shaped groove, and the gas enters from the air inlet and applies pressure to the lower end of the first valve plate, so that the first valve plate further fits with the first L-shaped groove and the second L-shaped groove, thereby achieving a sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional view of the closed state structure of the utility model;

[0014] Figure 2 This is a cross-sectional view of the structure of the utility model in the open state;

[0015] Figure 3 This is an enlarged view of position A of the utility model;

[0016] Figure 4 It is an enlarged view of position B of the present utility model.

[0017] In the figure: valve body 1, cavity 2, air inlet 3, air outlet 4, first mounting block 5, first L-shaped groove 6, second mounting block 7, second L-shaped groove 8, driving mechanism 9, first valve plate 10, first connecting block 11, transmission block 12, first rotating shaft 13, third mounting block 14, first through hole 15, second valve plate 16, second rotating shaft 17, second through hole 18, limit block 19, fourth mounting block 20, additional block 21, second connecting block 22, spring 23, positioning block 24, positioning groove 25, first sealing gasket 26, second sealing gasket 27. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Reference Figure 1-4The EGR valve with reliable sealing comprises a valve body 1, a cavity 2 is provided inside the valve body 1, an air inlet 3 and an air outlet 4 are provided on the surface of the valve body 1, the air inlet 3 and the air outlet 4 are both connected with the cavity 2, a first mounting block 5 is provided on the inner wall of one side of the cavity 2, a first L-shaped groove 6 is provided on one end of the first mounting block 5, a second mounting block 7 is provided on the inner wall of one side of the cavity 2, a second L-shaped groove 8 is provided on one end of the second mounting block 7, the second L-shaped groove 8 and the first L-shaped groove 6 are on the same horizontal line, ensuring that the first valve plate 10 is in a horizontal state when in a closed state. A driving mechanism 9 is provided on the surface of one side of the valve body 1, one end of the driving mechanism 9 penetrates the valve body 1 and is provided with a first valve plate 10, the thickness of the first valve plate 10 matches the first L-shaped groove 6 and the second L-shaped groove 8, ensuring that the first valve plate 10 can be tightly closed. A first connection block 11 is provided on the upper surface of the first valve plate 10, a transmission block 12 is provided on the side of the first connection block 11, and the transmission block 12 is hinged to the first connection block 11 through a first rotating shaft 13. A third mounting block 14 is provided on the inner wall of the cavity 2, and a first through hole 15 is provided on the surface of the third mounting block 14. A second valve plate 16 is provided above the third mounting block 14, and a fixing device is provided on the lower surface of the second valve plate 16, and the fixing device is hinged to the transmission block 12 through a second rotating shaft 17. Two second through holes 18 are provided on the surface of the second valve plate 16. Two limit blocks 19 are provided on the upper surface of the third mounting block 14, which play a role of limiting, so that the third mounting block 14 can only move upward and downward along the limit blocks 19. The upper ends of the two limit blocks 19 pass through the second through hole 18, and fourth mounting blocks 20 are provided on the inner walls on both sides of the cavity 2, and the upper ends of the limit blocks 19 are connected to the lower surface of the fourth mounting block 20.

[0020] The fixing device includes an additional block 21, a second connecting block 22 is provided on the lower surface of the additional block 21, and the second connecting block 22 is hinged to the transmission block 12 by connecting the second rotating shaft 17. The additional block 21 can extend into the first through hole 15 to play a preliminary sealing role, and is also convenient for hinge connection with the transmission block 12.

[0021] The two limit blocks 19 are both sleeved with springs 23, the upper ends of the two springs 23 are both connected to the fourth mounting block 20, and the lower ends of the two springs 23 are both connected to the upper surface of the second valve plate 16. When the second valve plate 16 is pressed on the third mounting block 14, the spring 23 is still in a compressed state, and can push the second valve plate 16 downward, so that the second valve plate 16 and the third mounting block 14 are more tightly sealed.

[0022] A plurality of positioning blocks 24 are provided on the lower surface of the second valve plate 16, and a plurality of positioning grooves 25 are provided on the upper surface of the third mounting block 14. The plurality of positioning grooves 25 correspond to the plurality of positioning blocks 24 one by one, and the positioning grooves 25 match the positioning blocks 24. The positioning grooves 25 and the positioning blocks 24 play a positioning role, and also play a role in preventing the second valve plate 16 from shaking left and right when the second valve plate 16 contacts the third mounting block 14.

[0023] Two first sealing pads 26 are disposed on the lower surface of the second valve plate 16 to play a sealing role.

[0024] A second sealing gasket 27 is disposed on the upper inner wall of the first L-shaped groove 6 and the lower inner wall of the second L-shaped groove 8 to play a sealing role.

[0025] Working principle: when ventilation is needed, first start the driving mechanism 9, and rotate the shaft of the driving mechanism 9 counterclockwise to make the first valve plate 10 rotate counterclockwise, so that the transmission block 12 pushes the fixing device to move upward, and then pushes the second valve plate 16 to move upward along the limit block 19. At this time, the gas can enter from the air inlet 3 and be discharged from the air outlet 4; when the air is needed to be closed, first start the driving mechanism 9, and rotate the shaft of the driving mechanism 9 clockwise to make the transmission block 12 pull the fixing device to move downward, and then pull the second valve plate 16 to move downward along the limit block 19, so that the second valve plate 16 is firmly pressed on the third mounting block 14, which plays the first sealing guarantee. At the same time, the first valve plate 10 fits tightly with the first L-shaped groove 6 and the second L-shaped groove 8, and the gas enters from the air inlet 3 and gives pressure to the lower end of the first valve plate 10, so that the first valve plate 10 further fits with the first L-shaped groove 6 and the second L-shaped groove 8 to achieve a sealing effect.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An EGR valve with reliable sealing, comprising a valve body (1), wherein a cavity (2) is provided inside the valve body (1), It is characterized in that The surface of the valve body (1) is provided with an air inlet (3) and an air outlet (4), and the air inlet (3) and the air outlet (4) are both connected to the cavity (2); a first mounting block (5) is provided on the inner wall of one side of the cavity (2), and a first L-shaped groove (6) is provided at one end of the first mounting block (5); a second mounting block (7) is provided on the inner wall of one side of the cavity (2), and a second L-shaped groove (8) is provided at one end of the second mounting block (7), and the second L-shaped groove (8) and the first L-shaped groove (6) are on the same horizontal line; a driving mechanism (9) is provided on the surface of one side of the valve body (1), and one end of the driving mechanism (9) passes through the valve body (1) and is provided with a first valve plate (10), and the thickness of the first valve plate (10) matches that of the first L-shaped groove (6) and the second L-shaped groove (8); a first connecting block (11) is provided on the upper surface of the first valve plate (10), and the first connecting block A transmission block (12) is provided on the side of the cavity (11), the transmission block (12) and the first connection block (11) are hingedly connected via a first rotating shaft (13), a third mounting block (14) is provided on the inner wall of the cavity (2), a first through hole (15) is provided on the surface of the third mounting block (14), a second valve plate (16) is provided above the third mounting block (14), a fixing device is provided on the lower surface of the second valve plate (16), the fixing device and the transmission block (12) are hingedly connected via a second rotating shaft (17), two second through holes (18) are provided on the surface of the second valve plate (16), two limit blocks (19) are provided on the upper surface of the third mounting block (14), the upper ends of the two limit blocks (19) both pass through the second through holes (18), fourth mounting blocks (20) are provided on the inner walls on both sides of the cavity (2), the upper ends of the limit blocks (19) are connected to the lower surface of the fourth mounting block (20).

2. The EGR valve with reliable sealing according to claim 1, It is characterized in that The fixing device comprises an additional block (21), a second connecting block (22) is provided on the lower surface of the additional block (21), and the second connecting block (22) is hingedly connected to the transmission block (12) via a second rotating shaft (17).

3. The EGR valve with reliable sealing according to claim 1, It is characterized in that The two limit blocks (19) are externally sleeved with springs (23), the upper ends of the two springs (23) are connected to the fourth mounting block (20), and the lower ends of the two springs (23) are connected to the upper surface of the second valve plate (16).

4. The EGR valve with reliable sealing according to claim 1, It is characterized in that A plurality of positioning blocks (24) are provided on the lower surface of the second valve plate (16), and a plurality of positioning grooves (25) are provided on the upper surface of the third mounting block (14). The plurality of positioning grooves (25) correspond one-to-one to the plurality of positioning blocks (24), and the positioning grooves (25) match the positioning blocks (24).

5. The EGR valve with reliable sealing according to claim 1, It is characterized in that Two first sealing gaskets (26) are provided on the lower surface of the second valve plate (16).

6. The EGR valve with reliable sealing according to claim 1, It is characterized in that A second sealing gasket (27) is provided on the upper inner wall of the first L-shaped groove (6) and the lower inner wall of the second L-shaped groove (8).

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