Slide valve type variable section EGR (Exhaust Gas Recirculation) valve

Abstract

The utility model relates to the technical field of EGR valves, in particular to a slide valve type variable-section EGR valve which comprises an EGR valve body, the lower end of a telescopic rod penetrates through a first waste gas inlet and is provided with a waste gas inlet amount adjusting device, a clearing device is arranged on the surface of the telescopic rod, the telescopic rod is sleeved with a sealing block, and a recycling block is arranged at the lower end of a shell. Through the arrangement of the first filter screen, large-particle impurities can be filtered out, and deposited carbon can also be filtered out; the arranged second filter screen can filter tiny impurities, and water vapor can also be filtered; meanwhile, according to the arranged removing device, a power mechanism is started, a telescopic rod is made to stretch or retract, then a cleaning block is driven to move up and down, the cleaning block can scrape away carbon deposits on the inner wall of the EGR valve body, the carbon deposits fall into the inner wall of a recycling block from a first waste gas inlet, and recycling of the carbon deposits is completed. After EGR is used for a long time, carbon deposition cannot be caused to block the EGR valve, and the failure rate of the EGR valve is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of EGR valves, in particular to a slide valve type variable cross-section EGR valve. Background Art

[0002] The exhaust gas recirculation valve, or EGR valve for short, is an important component installed on a diesel engine to control the amount of exhaust gas recirculation in the intake system. The EGR valve is usually located on the right side of the intake manifold, close to the throttle body, and is connected to the intake manifold and the exhaust manifold. The exhaust gas controls the opening degree of the valve through the vacuum tube, which in turn determines the amount of exhaust gas transmitted to the intake manifold. The function of the EGR valve is to guide the exhaust gas discharged from the engine combustion to the intake manifold to participate in the combustion, thereby reducing the temperature of the combustion chamber, improving the engine's working efficiency, improving the combustion environment, and reducing the burden on the engine. In addition, the EGR valve can also effectively reduce the emission of carbon monoxide compounds, reduce knocking, and extend the service life of various components.

[0003] For example, the authorization announcement number "CN204755120U" is named an EGR valve. Although the intermediate gear adopts a double gear transmission and increases the diameter of the transmission shaft, the reliability of the positioning transmission is enhanced, the gear noise is greatly reduced, and the EGR opens quickly and closes and returns quickly. However, long-term use of EGR will cause carbon deposits to block the EGR valve, and the EGR valve will fail, which will cause a series of problems and adverse effects on the vehicle, increase the maintenance cost of the EGR valve, and shorten the service life of the EGR; the sliding valve EGR cannot accurately control the intake volume of the exhaust gas, resulting in excessive intake volume, which will produce excessive carbon deposits and affect the service life of the EGR valve. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a slide valve type variable cross-section EGR valve.

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

[0006] A sliding valve type variable cross-section EGR valve is designed, including an EGR valve body, wherein a power mechanism is provided on the upper surface of the EGR valve body, an air inlet is provided on one side surface of the EGR valve body, and a mixed gas outlet is provided on the other side surface of the EGR valve body, a telescopic rod is provided on the lower surface of the power mechanism, the lower end of the telescopic rod penetrates the upper surface of the EGR valve body, a first exhaust gas inlet is provided on the lower surface of the EGR valve body, the lower end of the telescopic rod penetrates the first exhaust gas inlet and is provided with an exhaust gas intake amount regulating device, a cleaning device is provided on the surface of the telescopic rod, a sealing block is sleeved on the outside of the telescopic rod, a sealing strip is provided on the lower surface of the sealing block, a sealing groove is provided on the lower inner wall of the EGR valve body, and the sealing strip is provided on the lower inner wall of the EGR valve body. The groove matches the sealing strip, and a shell is provided at the lower end of the EGR valve body. A second exhaust gas inlet is provided on the side surface of the shell, and a filtering device is provided on the inner wall of the shell. A first connecting ear is provided in a ring shape on the side surface of the EGR valve body, and a second connecting ear is provided in a ring shape on the upper part of the side surface of the shell. The first connecting ear matches the second connecting ear, and the first connecting ear and the second connecting ear are connected through a first detachable component. A recovery block is provided at the lower end of the shell, and a third connecting ear is provided in a ring shape on the lower part of the side surface of the shell. A fourth connecting ear is provided in a ring shape on the side surface of the recovery block, and the fourth connecting ear matches the third connecting ear, and the fourth connecting ear and the third connecting ear are connected through a second detachable component.

[0007] Preferably, the cleaning device comprises a plurality of support blocks, one end of each of the support blocks is connected to the surface of the telescopic rod, one end of each of the support blocks away from the telescopic rod is provided with a mounting block, and a cleaning block is provided in a ring shape on the surface of each of the mounting blocks.

[0008] Preferably, the exhaust gas intake and exhaust gas amount regulating device comprises a plurality of air limiting blocks, wherein the plurality of air limiting blocks are cylinders of different diameters, and the plurality of air limiting blocks are arranged with diameters from large to small from top to bottom.

[0009] Preferably, the first detachable component includes a plurality of first bolts, one end of each of the first bolts passes through the second connecting ear and the first connecting ear, a first nut is provided directly above the first bolt, and the first nut is threadedly connected to the first bolt.

[0010] Preferably, the second detachable component includes a plurality of second bolts, one end of each second bolt passes through the fourth connecting ear and the third connecting ear, a second nut is provided directly above the second bolt, and the second nut is threadedly connected to the second bolt.

[0011] Preferably, the filtering device includes a first filter screen and a second filter screen, one end of the first filter screen and the second filter screen are connected to the inner wall of the recovery block, and the first filter screen and the second filter screen are inclined upward and downward in a direction away from the second exhaust gas inlet.

[0012] Preferably, a third filter screen and a fourth filter screen are provided on the inner wall of the mixed gas outlet, and the third filter screen and the fourth filter screen are inclined upward and downward in a direction away from the EGR valve body.

[0013] The sliding valve type variable cross-section EGR valve proposed by the utility model has the following beneficial effects: the filter device can filter out large particles of impurities and carbon deposits through the first filter screen; the second filter screen can filter out tiny impurities and water vapor; at the same time, the cleaning device can start the power mechanism to extend or shorten the telescopic rod, drive the support block to move up and down, and then drive the cleaning block to move up and down, and the cleaning block can scrape the carbon deposits on the inner wall of the EGR valve body, and the carbon deposits will slide to the lower inner wall of the EGR valve body. By shortening the telescopic rod, the carbon deposits fall from the first exhaust gas inlet to the inner wall of the recovery block, and the carbon deposits are recovered. The long-term use of EGR will not cause carbon deposits to block the EGR valve, reduce the failure rate of the EGR valve, ensure that the vehicle will not have problems, reduce the maintenance cost of EGR, and extend the service life of EGR. The exhaust gas intake regulating device is set up to adjust the exhaust gas intake through air limiting blocks of different diameters, so that the EGR valve body can enter an appropriate amount of intake air, and will not generate excessive carbon deposits due to excessive exhaust gas entering the EGR valve body, thereby extending the service life of the EGR valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural sectional view of the utility model;

[0015] Figure 2 This is a diagram of the cleaning device and the exhaust gas intake amount regulating device of the utility model;

[0016] Figure 3 This is an enlarged view of position A of the utility model;

[0017] Figure 4 This is an enlarged view of position B of the utility model;

[0018] Figure 5 It is an enlarged view of the C position of the present utility model.

[0019] In the figure: EGR valve body 1, power mechanism 2, air inlet 3, mixture outlet 4, telescopic rod 5, first exhaust gas inlet 6, sealing block 7, sealing strip 8, sealing groove 9, shell 10, second exhaust gas inlet 11, first connecting ear 12, second connecting ear 13, recovery block 14, third connecting ear 15, fourth connecting ear 16, support block 17, mounting block 18, cleaning block 19, air limiting block 20, first bolt 21, first nut 22, second bolt 23, second nut 24, first filter 25, second filter 26, third filter 27, fourth filter 28. DETAILED DESCRIPTION

[0020] 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.

[0021] Reference Figure 1-5 The slide valve type variable cross-section EGR valve comprises an EGR valve body 1, a power mechanism 2 is arranged on the upper surface of the EGR valve body 1, an air inlet 3 is arranged on one side of the EGR valve body 1, a mixed gas outlet 4 is arranged on the other side of the EGR valve body 1, a telescopic rod 5 is arranged on the lower surface of the power mechanism 2, the lower end of the telescopic rod 5 penetrates the upper surface of the EGR valve body 1, a first exhaust gas inlet 6 is arranged on the lower surface of the EGR valve body 1, the lower end of the telescopic rod 5 penetrates the first exhaust gas inlet 6 and is provided with an exhaust gas intake amount regulating device, the exhaust gas intake amount regulating device comprises a plurality of air limiting blocks 20, the plurality of air limiting blocks 20 are cylinders of different diameters, and the plurality of air limiting blocks 20 are arranged from large to small in diameter from top to bottom. The exhaust gas intake amount regulating device is set, and the computer end controls the telescopic distance of the telescopic rod 5 through an electrical signal. The air limiting blocks 20 of different diameters can adjust the exhaust gas intake amount, so that the EGR valve body 1 enters an appropriate amount of intake air, and does not generate excessive carbon deposition due to excessive exhaust gas entering the EGR valve body 1, thereby extending the service life of the EGR valve.

[0022] The surface of the telescopic rod 5 is provided with a cleaning device, which includes a plurality of support blocks 17, one end of each of the plurality of support blocks 17 is connected to the surface of the telescopic rod 5, and a mounting block 18 is provided at one end of each of the plurality of support blocks 17 away from the telescopic rod 5, and a cleaning block 19 is provided on the surface of each of the plurality of mounting blocks 18 in an annular manner. By starting the power mechanism 2, the telescopic rod 5 is extended or shortened, driving the support block 17 to move up and down, and then driving the cleaning block 19 to move up and down, and the cleaning block 19 can scrape off the carbon deposits on the inner wall of the EGR valve body 1, and the carbon deposits will slide onto the lower inner wall of the EGR valve body 1. By shortening the telescopic rod 5, a gap appears between the first exhaust gas inlet 6 and the air limiting block 20, and the carbon deposits fall from the gap between the first exhaust gas inlet 6 to the inner wall of the recovery block 14, and the carbon deposits are recovered. When the EGR is used for a long time, the carbon deposits will not block the EGR valve, reduce the failure rate of the EGR valve, ensure that the vehicle will not have problems, reduce the maintenance cost of the EGR, and extend the service life of the EGR.

[0023] The telescopic rod 5 is provided with a sealing block 7 on the outside, and a sealing strip 8 is provided on the lower surface of the sealing block 7. A sealing groove 9 is provided on the lower inner wall of the EGR valve body 1, and the sealing groove 9 matches the sealing strip 8. By starting the power mechanism 2, the sealing block 7 moves downward and upward, and the sealing strip 8 is pressed or separated from the sealing groove 9 to realize the opening and closing of the first exhaust gas inlet 6. The lower end of the EGR valve body 1 is provided with a shell 10, and the side surface of the shell 10 is provided with a second exhaust gas inlet 11. The exhaust gas first enters the interior of the shell 10 through the second exhaust gas inlet 11. The inner wall of the shell 10 is provided with a filtering device, and the filtering device includes a first filter screen 25 and a second filter screen 26. One end of the first filter screen 25 and the second filter screen 26 are both connected to the inner wall of the recovery block 14. The first filter screen 25 and the second filter screen 26 are inclined upward and downward in a direction away from the second exhaust gas inlet 11, which can reduce the carbon deposits attached to the first filter screen 25, and the carbon deposits will fall into the recovery block 14 along the first filter screen 25. The filter device is provided, and the large particles of impurities can be filtered out through the first filter 25, and the carbon deposits can also be filtered out; the second filter 26 is provided, and the tiny impurities can also be filtered out;

[0024] A first connecting ear 12 is provided in an annular manner on the side surface of the EGR valve body 1, and a second connecting ear 13 is provided in an annular manner on the upper part of the side surface of the housing 10. The first connecting ear 12 matches the second connecting ear 13, and the first connecting ear 12 and the second connecting ear 13 are connected through a first detachable component. The first detachable component includes a plurality of first bolts 21, one end of the first bolt 21 passes through the second connecting ear 13 and the first connecting ear 12, and a first nut 22 is provided just above the first bolt 21, and the first nut 22 is threadedly connected to the first bolt 21. By screwing the first bolt 21, the first bolt 21 and the first nut 22 can be connected and separated, which facilitates the disassembly of the housing 10 and the inspection and replacement of its internal components.

[0025] A recovery block 14 is provided at the lower end of the housing 10, a third connecting ear 15 is provided in an annular manner at the lower part of the side surface of the housing 10, a fourth connecting ear 16 is provided in an annular manner on the side surface of the recovery block 14, the fourth connecting ear 16 matches the third connecting ear 15, and the fourth connecting ear 16 and the third connecting ear 15 are connected through a second detachable component. The second detachable component includes a plurality of second bolts 23, one end of the second bolt 23 passes through the fourth connecting ear 16 and the third connecting ear 15, a second nut 24 is provided just above the second bolt 23, and the second nut 24 is threadedly connected to the second bolt 23. By screwing the second bolt 23, the second bolt 23 and the second nut 24 can be connected and separated, which is convenient for the recovery block 14 and the carbon deposits inside it can be cleaned.

[0026] A third filter 27 and a fourth filter 28 are provided on the inner wall of the mixture outlet 4. The third filter 27 can filter out residual large particles of impurities and residual carbon deposits; the fourth filter 28 can filter out residual tiny impurities and residual water vapor; the third filter 27 and the fourth filter 28 are inclined upward and downward in a direction away from the EGR valve body 1, which can reduce the adhesion of carbon deposits to the third filter 27, and the carbon deposits will fall into the EGR valve body 1 along the third filter 27.

[0027] 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. A slide valve type variable cross-section EGR valve, comprising an EGR valve body (1), characterized in that: The upper surface of the EGR valve body (1) is provided with a power mechanism (2); one side surface of the EGR valve body (1) is provided with an air inlet (3); the other side surface of the EGR valve body (1) is provided with a mixed gas outlet (4); the lower surface of the power mechanism (2) is provided with a telescopic rod (5); the lower end of the telescopic rod (5) penetrates the upper surface of the EGR valve body (1); the lower surface of the EGR valve body (1) is provided with a first exhaust gas inlet (6); the lower end of the telescopic rod (5) penetrates the first exhaust gas inlet (6) and is provided with an exhaust gas intake amount regulating device; the surface of the telescopic rod (5) is provided with a cleaning device; the outer surface of the telescopic rod (5) is sleeved with a sealing block (7); the lower surface of the sealing block (7) is provided with a sealing strip (8); the lower inner wall of the EGR valve body (1) is provided with a sealing groove (9); the sealing groove (9) matches the sealing strip (8); the lower surface ... lower surface of the EGR valve body (1) is provided with a sealing groove (9); the A housing (10) is provided at the end, a second exhaust gas inlet (11) is provided on the side surface of the housing (10), a filtering device is provided on the inner wall of the housing (10), a first connecting ear (12) is provided in an annular manner on the side surface of the EGR valve body (1), a second connecting ear (13) is provided in an annular manner on the upper part of the side surface of the housing (10), the first connecting ear (12) matches the second connecting ear (13), and the first connecting ear (12) and the second connecting ear (13) are connected via a first detachable component, a recovery block (14) is provided at the lower end of the housing (10), a third connecting ear (15) is provided in an annular manner on the lower part of the side surface of the housing (10), a fourth connecting ear (16) is provided in an annular manner on the side surface of the recovery block (14), the fourth connecting ear (16) matches the third connecting ear (15), and the fourth connecting ear (16) and the third connecting ear (15) are connected via a second detachable component.

2. The slide valve type variable area EGR valve according to claim 1, characterized in that: The cleaning device comprises a plurality of support blocks (17), one end of each of the plurality of support blocks (17) being connected to the surface of the telescopic rod (5), a mounting block (18) being provided at one end of each of the plurality of support blocks (17) away from the telescopic rod (5), and a cleaning block (19) being provided in an annular shape on the surface of each of the plurality of mounting blocks (18).

3. The slide valve type variable area EGR valve according to claim 1, characterized in that: The exhaust gas intake and exhaust gas volume regulating device comprises a plurality of air limiting blocks (20), wherein the plurality of air limiting blocks (20) are cylinders of different diameters, and the plurality of air limiting blocks (20) are arranged with diameters from large to small from top to bottom.

4. The slide valve type variable area EGR valve according to claim 1, characterized in that: The first detachable component comprises a plurality of first bolts (21), one end of each of the first bolts (21) passing through the second connecting ear (13) and the first connecting ear (12), a first nut (22) being provided directly above the first bolt (21), and the first nut (22) being threadedly connected to the first bolt (21).

5. The slide valve type variable area EGR valve according to claim 1, characterized in that: The second detachable component comprises a plurality of second bolts (23), one end of each of the second bolts (23) passing through the fourth connecting ear (16) and the third connecting ear (15), a second nut (24) being provided directly above the second bolt (23), and the second nut (24) being threadedly connected to the second bolt (23).

6. The slide valve type variable area EGR valve according to claim 1, characterized in that: The filtering device comprises a first filter screen (25) and a second filter screen (26), one end of each of the first filter screen (25) and the second filter screen (26) being connected to the inner wall of the recovery block (14), and the first filter screen (25) and the second filter screen (26) being inclined upward and downward in a direction away from the second exhaust gas inlet (11).

7. The slide valve type variable area EGR valve according to claim 1, characterized in that: A third filter screen (27) and a fourth filter screen (28) are provided on the inner wall of the mixed gas outlet (4), and the third filter screen (27) and the fourth filter screen (28) are inclined upward and downward in a direction away from the EGR valve body (1).

Images