Valve body and exhaust gas recycling system

Abstract

The invention provides a valve body and a waste gas recycling system, and relates to the technical field of vehicles, and the valve body comprises a valve plate and a first channel; the valve plate is used for opening or closing the valve body; an inlet of the first channel is used for introducing waste gas, an injection opening is formed in the inner wall of the downstream of the first channel, a valve plate is arranged on the upstream of the first channel, the injection opening can flow mixed gas out of an outlet of the first channel, and the flow speed of the mixed gas is larger than that of the waste gas so that pressure difference can be formed on the two sides of the valve plate in the extending direction of the first channel. By means of the arrangement, the probability that condensate water drops in waste gas are attached to the valve body can be effectively reduced, and meanwhile the mixing amount of the waste gas and mixed gas is increased. And the problems that the anti-corrosion structure of the exhaust gas recirculation valve is complex and the applicability is low are solved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a valve body and an exhaust gas recovery and reuse system. Background Art

[0002] The EGR (Exhaust Gas Recirculation) system is an important technology for reducing engine nitrogen oxide (NOx) emissions. It works by directing a portion of burned exhaust gas from the exhaust manifold, cooling and conditioning it, and then reintroducing it into the intake manifold. After mixing with fresh air, it re-enters the cylinders for combustion.

[0003] During the operation of the EGR system, the EGR valve body plays a particularly important role. The release of exhaust gas is controlled by opening and closing the EGR valve body. However, after the exhaust gas enters the EGR system, the temperature drops and the water vapor contained in it will be converted into condensed water. When the condensed water droplets mix with the acidic substances in the exhaust gas, they will corrode the EGR valve body.

[0004] To address the above issues, patent CN222513544U (An Anti-corrosion Structure for an Exhaust Gas Recirculation Valve, Exhaust Gas Recirculation Valve, and Motor Vehicle) proposes an anti-corrosion structure for an exhaust gas recirculation valve. The structure uses a seal to prevent condensed water from flowing through the bearings into the valve body, thereby corroding the valve body. The seal also prevents condensed water from flowing into the bearings, thereby corroding the bearings. However, the structure is complex and has limited applicability. Summary of the Invention

[0005] The present invention provides a valve body and an exhaust gas recovery and reuse system to solve the problems of the exhaust gas recirculation valve in the prior art, such as the complex anti-corrosion structure and low applicability.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] In a first aspect, the present application provides an exhaust gas recovery and reuse system, comprising: an exhaust gas input device, a valve body, a supercharging device and an intercooling device, wherein the exhaust gas input device is capable of releasing exhaust gas; the exhaust gas input device is connected to the first channel inlet of the valve body so that the exhaust gas can flow out from the first channel outlet and mix with the air to form a mixed gas; the supercharging device is connected to the first channel outlet, and the supercharging device is capable of supercharging the mixed gas; the intercooling device is connected to the supercharging device, and the intercooling device is capable of cooling the pressurized mixed gas; wherein the supercharging device or the intercooling device is connected to the injection port of the valve body.

[0008] The second aspect of the present application provides a valve body, comprising: a valve plate and a first channel; the valve plate is used to open or close the valve body; the inlet of the first channel is used to allow exhaust gas to enter, an injection port is provided on the inner wall downstream of the first channel, and a valve plate is provided upstream of the first channel, the injection port can flow out a mixed gas to the outlet of the first channel, and the mixed gas flow rate is greater than the exhaust gas flow rate, so that a pressure difference is formed on both sides of the valve plate along the extension direction of the first channel. Such a configuration, due to the difference in the flow rate of the exhaust gas and the mixed gas, allows the exhaust gas on the high-pressure side of the valve plate to flow to the low-pressure side of the valve plate and be carried out by the high-speed flowing mixed gas, effectively reducing the probability of condensed water droplets in the exhaust gas adhering to the valve body, while increasing the mixing amount of the exhaust gas and the mixed gas.

[0009] Furthermore, the injection port is annular and arranged around the central axis of the first channel. This arrangement allows the mixed gas to form an annular air curtain extending outward from the outlet of the first channel. The air curtain covers the inner wall of the first channel, preventing condensed water from falling onto the inner wall of the first channel. The area enclosed by the air curtain also forms a siphon area to siphon the exhaust gas, thereby enhancing the mixing effect of the mixed gas and the exhaust gas.

[0010] The valve body further includes a second channel, which is disposed around the first channel and surrounds the central axis of the first channel. The cross-section of the second channel from the inlet to the outlet of the first channel is a circular cross-section with a gradually decreasing radius. The outlet of the second channel serves as an injection port, and the inlet of the second channel is used to admit the mixed gas. This arrangement has a simple structure and is effective in guiding the mixed gas.

[0011] Furthermore, the extension direction of the second channel forms a preset angle with the extension direction of the first channel, and the preset angle is greater than or equal to 10 degrees and less than or equal to 70 degrees. Such a setting can ensure that there is a sufficient pressure difference on both sides of the valve plate along the length direction of the first channel while increasing the structural stability of the valve body.

[0012] Furthermore, a first ratio of the second dimension to the first dimension is greater than or equal to 0.01 and less than or equal to 0.1; the first dimension is the dimension of the first channel perpendicular to the direction in which the first channel extends, and the second dimension is the dimension of the second channel perpendicular to the direction in which the second channel extends. This configuration effectively reduces the probability of condensed water adhering to the valve body while increasing the amount of mixed gas and exhaust gas mixed.

[0013] Furthermore, the second ratio of the preset distance to the first dimension is greater than or equal to 0.1 and less than or equal to 0.5; the preset distance is the distance between the end of the injection port along the direction from the outlet to the inlet of the first channel and the valve plate, and the first dimension is the dimension of the first channel perpendicular to the direction in which the first channel extends. This configuration can effectively reduce the probability of condensate adhering to the valve body while increasing the mixing amount of the mixed gas and the exhaust gas.

[0014] Furthermore, the valve body includes a circulation space disposed around the first channel and surrounding its central axis. The inlet of the second channel is connected to the circulation space, thereby communicating with the first channel. The circulation space is used to circulate the mixed gas. This ensures that the amount of mixed gas injected from each injection port is nearly uniform, forming a relatively uniform air curtain and achieving a good siphoning effect on the exhaust gas.

[0015] Furthermore, the valve body further includes a housing having a first channel formed therein, a flow space formed therein, and a second channel connected to the first channel and the flow space. With this arrangement, the high-temperature mixed gas flows in the flow space, thereby increasing the temperature of the housing and preventing condensation on the valve body.

[0016] Furthermore, the valve body further comprises: an air intake component connected to the housing, and configured to input the mixed gas into the flow space. Such an arrangement can increase the structural stability of the valve body and facilitate installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a general exhaust gas recovery system flow chart;

[0018] Figure 2 The first flow chart of the exhaust gas recycling system provided for this application;

[0019] Figure 3 The second flow chart of the exhaust gas recycling system provided for this application;

[0020] Figure 4 An axonometric view of the valve body provided for this application;

[0021] Figure 5 For this application Figure 4 A partial schematic diagram of the valve body S portion is shown;

[0022] Figure 6 For this application Figure 4 A top view of the valve body is shown;

[0023] Figure 7 For this application Figure 6 A cross-sectional view of the AA portion of the valve body is shown;

[0024] Figure 8 For this application Figure 6 A cross-sectional view of the BB portion of the valve body is shown. DETAILED DESCRIPTION

[0025] In order to enable ordinary people in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0026] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0027] like Figure 1 As shown, in the exhaust gas recycle system of the related art, exhaust gas from exhaust gas input device 10 is generally passed into catalyst 20, cooled by cooler 30, and then enters valve body 40. Simultaneously, air provided by air input device 90 passes through air filter 80 and is then mixed with exhaust gas released from valve body 40 to form a mixed gas. The mixed gas then passes through supercharging device 70. At this time, the pressure and temperature of the mixed gas both increase, but the temperature of the mixed gas is lower than the temperature before the exhaust gas enters cooler 30 for cooling. Due to the increased temperature of the mixed gas after passing through supercharging device 70, it needs to enter intercooler 60 for further cooling before finally passing through throttle valve 50 to enter the device using the mixed gas.

[0028] like Figure 2 and Figure 3 As shown, the present application provides a waste gas recovery and reuse system, which can be used in equipment such as automobiles, motorcycles and ships, and can also be used in chemical, power production and other equipment that require waste gas recovery and reuse. The specific use of the waste gas recovery and reuse system is not limited to the working scenario, and can be selected according to actual conditions.

[0029] The exhaust gas recovery and reuse system includes an exhaust gas input device 10, which is capable of releasing exhaust gas. Exemplarily, the exhaust gas input device 10 can be a manifold connected to the exhaust port of an internal combustion engine, which releases the exhaust gas output by the internal combustion engine. The exhaust gas input device 10 can also be an exhaust gas storage tank, which outputs the exhaust gas through the output port of the tank. It can also be the exhaust gas input device 10 of a conventional EGR system, which can guide the exhaust gas to the catalyst 20 for catalysis through the exhaust manifold, and then pass it into the cooler 30 for cooling. The purpose of cooling is that the low-temperature exhaust gas mixed with air helps reduce the peak temperature in the combustion chamber, thereby effectively reducing the generation of NOx (nitrogen oxides). In addition, the lower temperature mixture can also improve the thermal efficiency of the engine, improve fuel economy, and reduce the risk of knock, especially in gasoline engines.

[0030] In addition, the exhaust gas recovery and reuse system may also include a valve body 40, and the exhaust gas input device 10 is connected to the inlet of the first channel 2 of the valve body 40, so that the exhaust gas can flow out from the outlet of the first channel 2 and mix with the air to form a mixed gas; in some possible structures, the outlet of the exhaust gas input device 10 can be connected to the inlet of the first channel 2 of the valve body 40 by a pipeline connection.

[0031] Valve body 40 has opening and closing functions. In some cases, when the exhaust gas recycle system is required to operate, valve body 40 can be opened, allowing exhaust gas to flow through first channel 2 and be released at the outlet of first channel 2. In other cases, when the exhaust gas recycle system is not required to operate, valve body 40 can be closed, in which case the exhaust gas is blocked within first channel 2. On this basis, the opening or closing of valve body 40 can be achieved by moving or rotating valve plate 1. The specific structure of valve plate 1 and the method by which valve plate 1 opens or closes valve body 40 are not specifically limited.

[0032] The fluid recovery and reuse system may also include an air input device 90. In some possible structures, the air input device 90 may include an air suction device and an air filter 80. The air input device 90 may be connected to the outlet of the first channel 2 of the valve body 40 through a pipe. When the valve body 40 is opened and the valve body 40 releases the exhaust gas, the air input device 90 may also release air at the same time to mix the air with the exhaust gas. In other possible structures, the air input device 90 and the outlet of the first channel 2 may be connected to the same container at the same time through a pipe. For example, the container may be a gas tank or a gas cylinder, so that the exhaust gas and air can be fully mixed in the container. There is no specific limitation on the container for mixing air and exhaust gas, and it can be selected based on factors such as spatial layout and mixing amount.

[0033] like Figure 2 、 Figure 3 and Figure 4 As shown, further, the exhaust gas recovery and reuse system may also include a supercharging device 70, which is connected to the outlet of the first channel 2. The supercharging device 70 is capable of supercharging the mixed gas; illustratively, the supercharging device 70 may be a compressor, or a boosting pump or a supercharger. The supercharging device 70 may be connected to the outlet of the first channel 2 through a pipeline. In some possible structures, the supercharging device 70 may be connected to a container for mixing air and exhaust gas to enable the mixer to be input into the supercharging device 70. In other possible structures, if the mixing of air and exhaust gas is carried out in a pipeline, the pipeline for mixing exhaust gas and air may be directly connected to the supercharging device 70, and the structure and connection of the supercharging device 70 are not specifically limited. The purpose of the supercharging device 70 is to increase the pressure of the mixed gas. The purpose of the supercharging device 70 is to ensure that the mixed gas has sufficient pressure to enter the combustion chamber of the engine and ensure good combustion efficiency.

[0034] On this basis, the fluid recovery and reuse system also includes an intercooler 60, which is connected to the supercharging device 70. The intercooler 60 can cool the supercharged mixed gas. For example, the intercooler 60 can be a heat sink, a heat pipe, or a container with a heat dissipation device. The intercooler 60 and the supercharging device 70 can be connected by a pipe, or the intercooler 60 can be integrated at the outlet of the supercharging device 70, such as a cooling pipe or a heat exchange pipe, so that the supercharged mixed gas can be cooled in the intercooler 60. Since the supercharging device 70 supercharges the mixed gas, this will cause the temperature of the mixed gas to rise. The intercooler 60 can reduce the temperature of the supercharged mixed gas to prevent the temperature of the mixed gas from rising and affecting the reaction of the mixed gas in the combustion chamber.

[0035] like Figure 2 、 Figure 3 and Figure 4 As shown, the supercharging device 70 or the intercooling device 60 is further connected to the injection port 31 of the valve body 40. In some possible embodiments, the mixed gas pressurized by the supercharging device 70 may be passed into the injection port 31 of the valve body 40 and then flow out. In other possible embodiments, the gas, after being supercharged, may be cooled by the intercooling device 60 and then passed into the injection port 31 of the valve body 40 and then flow out. This is not particularly limited. The specific method can be selected based on actual operating conditions. For example, if the ambient temperature is low, or the exhaust gas recovery system is just started and the overall temperature is low, it is possible to pass the mixed gas heated by the supercharging device 70 into the injection port 31. Due to the high temperature of the mixed gas, the valve body 40 can be heated to a certain extent, preventing the formation of condensed water on the valve body 40. If the ambient temperature is high, or the exhaust gas recovery system is overheated due to overload, the mixed gas cooled by the intercooling device 60 can be passed into the injection port 31 to reduce the impact of the mixed gas on the system.

[0036] like Figure 2 、 Figure 3 and Figure 4As shown, in the fluid recovery and reuse system provided by the present application, whether the intercooler 60 or the supercharger 70 is connected to the injection port 31, the mixed gas input to the injection port 31 is high-pressure gas. When the high-pressure mixed gas is ejected from the injection port 31, it can have a high velocity and then flow out of the outlet of the first channel 2. However, the exhaust gas inputted into the first channel 2 by the exhaust gas input device 10 has a lower velocity than the mixed gas. This creates a pressure differential within the first channel 2. Locations where the high-velocity mixed gas flows have lower pressure, while locations within the first channel 2 where no high-velocity mixed gas flows have higher pressure due to the influx of the low-velocity exhaust gas. This causes the exhaust gas and condensate droplets in the exhaust gas to be attracted to locations with lower pressure and mixed with the mixed gas. After sufficient mixing, they are carried out of the outlet of the first channel 2 by the high-velocity mixed gas. This effectively reduces the impact of condensate on the exhaust gas recirculation system and allows the exhaust gas and mixed gas to be further fully mixed at the valve body 40. Furthermore, the structure is simple and highly applicable.

[0037] like Figure 4 、 Figure 5 and Figure 6 As shown, the present application provides a valve body 40, which includes a valve disc 1, and the valve disc 1 is used to open or close the valve body 40; for example, the valve disc 1 can be a gate valve disc 1, and the valve body 40 is opened or closed by moving the gate valve disc 1 up and down. The valve disc 1 can also be a butterfly gate disc, which can adjust or cut off the flow of fluid by rotation. There is no specific limitation on the specific structure of the valve disc 1 and the specific way in which the valve disc 1 opens or closes the valve body 40, and it can be selected according to actual needs. It is necessary to ensure that when the valve body 40 needs to be opened, the movement of the valve disc 1 can release the blockage of the first channel 2, so that the fluid can flow in the first channel 2. When the valve body 40 needs to be closed, the movement of the valve disc 1 can block the first channel 2, so that the fluid can be blocked in the first channel 2.

[0038] On this basis, the valve body 40 further includes a first channel 2. The first channel 2 can be a straight channel or a curved channel. The inlet of the first channel 2 is used to admit exhaust gas. The inlet of the first channel 2 can be connected to the exhaust gas input device 10 in the exhaust gas recovery and reuse system, so that the exhaust gas input device 10 inputs exhaust gas into the first channel 2.

[0039] An injection port 31 is provided on the inner wall downstream of the first channel 2, and a valve plate 1 is provided upstream of the first channel 2. The upstream and downstream of the first channel 2 can be determined based on the exhaust gas flow direction B. It can be understood that when the exhaust gas flows through the first channel 2, the first position it passes through may be upstream of the first channel 2, and the position it passes through later may be downstream of the first channel 2. In some possible embodiments, the first channel 2 may be a straight channel, and the injection port 31 may be provided on the valve plate 1 near the outlet of the first channel 2.

[0040] In addition, the injection port 31 can flow out the mixed gas to the outlet of the first channel 2, and the mixed gas flow rate is greater than the exhaust gas flow rate, so that a pressure difference is formed on both sides of the valve plate 1 along the extension direction of the first channel 2. The mixed gas can be a mixture of exhaust gas and air, and the mixed gas can come from the intercooler 60 or the supercharging device 70 in the exhaust gas recovery system. The injection port 31 can inject the mixed gas to the outlet of the first channel 2 by means of a diversion structure or a diversion component. Exemplarily, the diversion structure can be a diversion arc surface, and the diversion component can be a diversion plate, and the specific structure of the diversion structure is not limited. The mixed gas flow rate is greater than the exhaust gas flow rate, specifically because the mixed gas entering the injection port 31 is a high-pressure mixed gas, and the exhaust gas pressure entering from the inlet of the first channel 2 is relatively low, so that the flow rate of the mixed gas is greater than the exhaust gas. At the same time, the size of the injection port 31 for gas circulation can be smaller than the size of the first channel 2 for gas circulation. The exhaust gas with lower pressure flows in the wider first channel 2 at a slower speed, while the mixed gas with higher pressure flows out from a smaller injection port 31. When the mixed gas passes through the injection port 31, due to the change in the size of the flow space, the mixed gas will accelerate to flow out of the injection port 31, so that the speed of the mixed gas is greater than the speed of the exhaust gas.

[0041] Because the mixed gas flows at a relatively high speed to the outside of the first channel 2 outlet, while the exhaust gas flows at a relatively slow speed from the inlet of the first channel 2 into the interior of the first channel 2, this results in lower pressure in locations where the mixed gas flows at a higher speed. However, locations within the first channel 2 where the high-speed mixed gas does not flow experience higher pressure due to the inflow of the slower exhaust gas. This can be understood as the area of ​​valve plate 1 near the outlet of the first channel 2 having lower pressure, while the area near the inlet of the first channel 2 having higher pressure, creating a pressure differential across the valve plate 1 along the extension of the first channel 2. This pressure differential accelerates the exhaust gas from the higher-pressure area to flow toward the lower-pressure area, allowing the exhaust gas to fully mix with the mixed gas in the higher-pressure area and be carried out of the first channel 2 along with the high-speed mixed gas. Subsequently, the mixed gas mixed with the exhaust gas in the valve body 40 further mixes with the air released by the air input device 90 of the exhaust gas recovery and reuse system, effectively increasing the amount of exhaust gas and air mixed in the mixed gas. In this way, the valve body 40 provided by the present application reduces corrosion of the valve body 40 by condensed water while increasing the amount of exhaust gas and air mixed.

[0042] like Figure 5 、 Figure 7 and Figure 8 As shown, in some embodiments, the injection port 31 has an annular structure and is arranged around the central axis of the first channel 2. For example, the injection port 31 can have a circular ring structure or a rectangular ring structure. The specific shape of the injection port 31 is not limited and can be selected based on the cross-sectional shape of the first channel 2 along its length. In some possible embodiments, the cross-section of the first channel 2 along its length can be a circular cross-section, and the injection port 31 has a circular ring structure. The injection port 31 is arranged around the central axis of the first channel 2, which can be understood as the central axis of the annular injection port 31 can be the same as the central axis of the first channel 2. When the injection port 31 injects the mixed gas, the mixed gas can form an annular air curtain extending outward from the outlet of the first channel 2. The air curtain covers the inner wall of the first channel 2, which can prevent condensed water from falling onto the inner wall of the first channel 2. At the same time, the area enclosed by the air curtain can form a siphon area to siphon the exhaust gas, thereby improving the mixing effect of the mixed gas and the exhaust gas.

[0043] like Figure 7 and Figure 8 As shown, in some embodiments, the valve body 40 also includes a second channel 3, which is arranged on the circumferential side of the first channel 2 and surrounds the central axis of the first channel 2. The cross-section of the second channel 3 along the direction from the inlet of the first channel 2 to the outlet of the first channel 2 is a circular cross-section with a gradually decreasing radius. The outlet of the second channel 3 serves as an injection port 31, and the inlet of the second channel 3 is used to introduce the mixed gas.

[0044] In some possible embodiments, the second channel 3 may be opened on the side wall enclosing the first channel 2. In other possible embodiments, an annular component with the second channel 3 may be sleeved outside the first channel 2, and the second channel 3 may be an annular channel, so that the second channel 3 is arranged around the first channel 2. The second channel 3 surrounding the central axis of the first channel 2 can be understood as the central axis of the annular second channel 3 can be the central axis of the first channel 2.

[0045] On this basis, the cross-sections of the second channel 3 along the direction from the inlet of the first channel 2 to the outlet of the first channel 2 are all perpendicular to the extension direction of the first channel 2. The cross-sectional areas of these cross-sections gradually decrease from the inlet of the first channel 2 to the outlet of the first channel 2. In some possible embodiments, the radii of these cross-sections may decrease by a gradually increasing difference, so that the extension direction of the second channel 3 from the inlet to the outlet is a curve. For example, along the direction from the inlet of the first channel 2 to the outlet of the first channel 2, the second channel 3 has a first cross-section, a second cross-section, and a third cross-section spaced apart, with the radius of the first cross-section being 2 cm greater than the radius of the second cross-section, and the radius of the second cross-section being 1 cm greater than the radius of the third cross-section. In other possible embodiments, the radii of these cross-sections may decrease by a fixed value, so that the extension direction of the second channel 3 from the inlet to the outlet is a straight line. For example, along the direction from the inlet of the first channel 2 to the outlet of the first channel 2, the second channel 3 has a fourth cross-section, a fifth cross-section, and a sixth cross-section spaced apart, with the difference between the radius of the fourth cross-section and the radius of the fifth cross-section being equal to the difference between the radius of the fifth cross-section and the radius of the sixth cross-section.

[0046] It should be noted that since the cross section is annular, and the annular cross section has a maximum outer radius and a minimum inner radius, both the maximum radius and the minimum radius of the annular cross section of the second channel 3 decrease from the inlet to the outlet of the first channel 2. The maximum radius and the minimum radius of the annular cross section can decrease together by the same value or by the same ratio.

[0047] For example, if the first channel 2 extends vertically and the outlet of the first channel 2 is located above the inlet of the first channel 2, then the inlet of the second channel 3 is relatively located below the outlet of the second channel 3, and the inlet of the second channel 3 is closer to the first channel 2 than the outlet of the second channel 3. In this way, the second channel 3 can guide the mixed gas, so that after the injection port 31 of the second channel 3 releases the mixed gas, the mixed gas can flow out of the first channel 2. This arrangement has a simple structure and good drainage effect on the mixed gas.

[0048] like Figure 7 and Figure 8 As shown, in some embodiments, the extension direction of the second channel 3 forms a preset angle R with the extension direction of the first channel 2, and the preset angle R is greater than or equal to 10° and less than or equal to 70°. For example, the preset angle R can be 10°, 20°, 50°, or 70°, etc., and can be selected based on the dimensions of the second channel 3 and the first channel 2 and actual design requirements.

[0049] In some possible embodiments, the second channel 3 may be formed on the sidewalls enclosing the first channel 2. When the preset angle R is 10°, the length of the second channel 3 is relatively long. This longer second channel 3 places certain demands on the length and strength of the sidewalls of the first channel 2. However, it provides better drainage of the mixed gas. If the preset angle R is less than 10°, the second channel 3 becomes too long, making the overall volume of the valve body 40 too large, and the siphoning effect on the exhaust gas is not significantly improved. If the thickness of the sidewalls enclosing the first channel 2 is relatively thin or the overall size of the valve body 40 is relatively small due to lightweight and cost requirements, a preset angle R of 70° may be selected. However, the siphoning effect on the exhaust gas and the drainage of the mixed gas are not as good as when the preset angle R is less than 70°. If the preset angle R is greater than 70°, the mixed gas may obstruct the normal flow of the exhaust gas, thereby affecting the normal operation of the valve body 40.

[0050] like Figure 7 and Figure 8 As shown, in some embodiments, the first ratio of the second dimension L2 to the first dimension L1 is greater than or equal to 0.01 and less than or equal to 0.1; the first dimension L1 is the dimension of the first channel 2 in a direction perpendicular to the extension direction of the first channel 2, and the second dimension L2 is the dimension of the second channel 3 in a direction perpendicular to the extension direction of the second channel 3.

[0051] On this basis, the first dimension L1 can be the dimension of a cross section perpendicular to the extension direction of the first channel 2. For example, if the cross section of the first channel 2 perpendicular to its length is circular, the first dimension L1 can be the diameter of the circle. If the cross section of the first channel 2 perpendicular to its length is rectangular, the first dimension L1 can be the length or width of the rectangular cross section. In some possible embodiments, the second channel 3 is an annular structure pipe arranged on the circumference of the first channel 2 and surrounding the central axis of the first channel 2. Therefore, the extension direction of the second channel 3 can be the direction from the outlet to the inlet of the second channel 3 or the direction from the inlet to the outlet of the second channel 3. The second dimension L2 can be the distance between the two inner walls of the second channel 3.

[0052] Furthermore, the first ratio can be 0.01, 0.05, or 0.1, and there is no specific numerical limit for the first ratio. The first ratio of the second dimension L2 to the first dimension L1 can be selected based on practical requirements, such as the overall size of the valve body 40 and the flow rates of the exhaust gas and mixed gas. For example, if the mixing of exhaust gas and air is highly desired, a first ratio of 0.01 can be selected. This means that the first dimension L1 is larger, while the second dimension L2 is smaller. In this way, in the larger first channel 2, the exhaust gas flows at a slower rate on the side of the valve body 40 near the inlet of the first channel 2. However, due to the smaller second dimension L2, the mixed gas can be released into the first channel 2 at a relatively faster rate, achieving better adsorption of the exhaust gas. If the first ratio is less than 0.01, the second channel 3 may be too small, preventing effective release of the mixed gas. If the amount of waste gas recovered is large, the first ratio can be set to 0.1, so that the second channel 3 can pass a large amount of mixed gas and increase the flow rate of the mixed gas by controlling the increase in the mixed gas pressure. If the first ratio is greater than 0.1, the pressure difference on both sides of the valve plate 1 along the length of the first channel 2 cannot be guaranteed, resulting in poor waste gas adsorption effect.

[0053] like Figure 7 and Figure 8 As shown, in some embodiments, the second ratio of the preset distance L3 to the first dimension L1 is greater than or equal to 0.1 and less than or equal to 0.5; the preset distance L3 is the distance between the end of the injection port 31 along the outlet to the inlet direction of the first channel 2 and the valve plate 1, and the first dimension L1 is the dimension of the first channel 2 in a direction perpendicular to the extension direction of the first channel 2.

[0054] On this basis, the second ratio can be 0.1, 0.3 or 0.5, etc., and is not specifically limited. The end of the injection port 31 along the outlet to the inlet direction of the first channel 2 can also be understood as the end of the injection port 31 on the inner wall of the first channel 2 close to the valve plate 1. The preset distance L3 can be understood as the distance between the injection port 31 and the valve plate 1. The specific selection of the second ratio can be based on actual needs, such as: the type of valve plate 1, the size of the valve body 40 and other factors. For example, if the valve plate 1 is a gate valve plate 1, the gate valve plate 1 needs to move along the length direction of the first channel 2 in order to open or close the valve body 40. Sufficient movement distance needs to be reserved for the valve body 40. At this time, the second ratio can be a variable. When the valve body 40 is closed, the second ratio can be 0.5, and when the valve body 40 is open, the second ratio can be 0.1. If the valve disc 1 is a butterfly-shaped valve disc 1, the valve disc 1 does not move in the direction of the extension of the first channel 2. In this case, the injection port 31 can be placed as close to the valve disc 1 as possible. In this case, the second ratio can be set to 0.1. This allows the air curtain formed by the mixture ejected from the injection port 31 to cover more of the sidewalls of the first channel 2, thereby preventing condensed water from corroding the sidewalls of the first channel 2. If the second ratio is less than 0.1, the valve disc 1 may block the injection port 31 due to movement tolerance. If the second ratio is greater than 0.5, the low-pressure area formed by the flow of the high-speed mixture is farther away from the valve disc 1, resulting in poor exhaust gas adsorption ability when the mixture flows through the high-pressure area.

[0055] like Figure 7 and Figure 8 As shown, in some embodiments, the valve body 40 further includes a circulation space A. The circulation space A is disposed around the first channel 2 and extends in the direction of the first channel 2. It can be understood that the components constituting the circulation space A also have an annular structure. Similarly, the central axis of the circulation space A can be the central axis of the first channel 2.

[0056] In some possible embodiments, the mixed gas from the supercharging device 70 or the intercooling device 60 in the exhaust gas recovery system can be introduced into the circulation space A for buffering, and the amount of the mixed gas introduced into the circulation space A can be greater than the amount of the mixed gas injected from the injection port 31, so that the mixed gas can fill the circulation space A. At the same time, since the circulation space A and the second channel 3 are both surrounded by the circumference of the first channel 2 and both surround the central axis of the first channel 2, the amount of the mixed gas injected from each location of the injection port 31 can be almost consistent, so as to form a more uniform air curtain and a better siphon effect on the exhaust gas.

[0057] like Figures 4 to 8As shown, in some embodiments, the valve body 40 further includes: a shell 4, a first channel 2 is provided on the shell 4, a circulation space A is formed in the shell 4, and the shell 4 is provided with a second channel 3 connecting the first channel 2 and the circulation space A. In some possible embodiments, the first channel 2 can be enclosed by the outer surface of the shell 4. The inner surface of the shell 4 encloses the circulation space A, and at the same time, a second channel 3 can be opened on the side wall enclosing the first channel 2 to connect the first channel 2 with the circulation space A through the second channel 3. In this way, the valve body 40 is set in the exhaust gas recovery system, and part of the mixed gas pressurized by the supercharging device 70 can be passed into the circulation space A. Since the temperature of the supercharged mixed gas increases, the mixed gas with increased temperature can exchange heat with the shell 4 after entering the circulation space A, so that the shell 4 is heated and the valve body 40 is at a higher temperature, so as to avoid the generation of condensed water after the exhaust gas contacts the valve body 40.

[0058] In some possible embodiments, before the exhaust gas recovery and reuse system is activated, the supercharging device 70 and the air input device 90 can be activated, allowing the air inputted by the air input device 90 to enter the supercharging device 70 for supercharging. The supercharged air is then divided into two parts. The first part of the air enters the intercooler 60 for cooling, and then enters the combustion chamber for reaction to produce exhaust gas. The second part of the high-temperature gas enters and fills the circulation space A, exchanging heat with the shell 4, thereby preheating the shell 4. When the exhaust gas generated by the reaction of the first part of the air flows into the valve body 40, because the valve body 40 is preheated, the water vapor in the exhaust gas will not produce condensation water due to cooling after contacting the valve body 40, thereby preventing the formation of condensation water on the valve body 40.

[0059] like Figures 4 to 8 As shown, in some embodiments, the valve body 40 further includes an air intake component 5, which is connected to the housing 4 and is used to input the mixed gas into the circulation space A. Exemplarily, the air intake component 5 can be a connecting pipe provided on the housing 4, or a connecting valve. The specific structure of the air intake component 5 is not specifically limited. In the exhaust gas recovery and reuse system, the air intake component 5 can be connected to the supercharging device 70 or the intercooling device 60, so that the supercharging device 70 or the intercooling device 60 can pass part of the mixed gas into the circulation space A. The connection is stable and the installation is convenient.

[0060] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A valve body, characterized in that: include: A valve plate (1), the valve plate (1) being used to open or close the valve body; A first channel (2), the inlet of the first channel (2) is used to allow exhaust gas to enter, an injection port (31) is provided on the inner wall of the first channel (2) downstream, a valve plate (1) is provided upstream of the first channel (2), the injection port (31) is capable of flowing out a mixed gas to the outlet of the first channel (2), the flow rate of the mixed gas is greater than the flow rate of the exhaust gas, so that a pressure difference is formed on both sides of the valve plate (1) along the extension direction of the first channel (2).

2. The valve body according to claim 1, characterized in that The injection port (31) is annular in structure and is arranged around the central axis of the first channel (2).

3. The valve body according to claim 2, characterized in that Also includes: A second channel (3), the second channel (3) is arranged on the peripheral side of the first channel (2) and surrounds the central axis of the first channel (2), the cross section of the second channel (3) along the direction from the inlet of the first channel (2) to the outlet of the first channel (2) is a circular cross section with a gradually decreasing radius, the outlet of the second channel (3) serves as the injection port (31), and the inlet of the second channel (3) is used for introducing the mixed gas.

4. The valve body according to claim 3, characterized in that The extension direction of the second channel (3) forms a preset angle (R) with the extension direction of the first channel (2), and the preset angle (R) is greater than or equal to 10° and less than or equal to 70°.

5. The valve body according to claim 3, characterized in that A first ratio of the second dimension (L2) to the first dimension (L1) is greater than or equal to 0.01 and less than or equal to 0.1; The first dimension (L1) is the dimension of the first channel (2) in a direction perpendicular to the extension direction of the first channel (2), and the second dimension (L2) is the dimension of the second channel (3) in a direction perpendicular to the extension direction of the second channel (3).

6. The valve body according to claim 2, characterized in that A second ratio of the preset distance (L3) to the first size (L1) is greater than or equal to 0.1 and less than or equal to 0.5; The preset distance (L3) is the distance between the end of the injection port (31) in the direction from the outlet to the inlet of the first channel (2) and the valve plate (1), and the first dimension (L1) is the dimension of the first channel (2) in a direction perpendicular to the extension direction of the first channel (2).

7. The valve body according to claim 3, characterized in that Also includes: A circulation space (A), the circulation space (A) is arranged on the peripheral side of the first channel (2) and is arranged around the central axis of the first channel (2), the inlet of the second channel (3) is connected to the circulation space (A) so that the circulation space (A) is in communication with the first channel (2), and the circulation space (A) is used to circulate the mixed gas.

8. The valve body according to claim 7, characterized in that Also includes: A shell (4) is provided with a first channel (2), the shell (4) has the circulation space (A) formed in the shell (4), and the shell (4) is provided with a second channel (3) communicating with the first channel (2) and the circulation space (A).

9. The valve body according to claim 8, characterized in that Also includes: An air intake component (5) is connected to the housing (4) and is used to input mixed gas into the flow space (A).

10. A waste gas recovery and reuse system, characterized in that: include: an exhaust gas input device (10), wherein the exhaust gas input device (10) is capable of releasing exhaust gas; The valve body (40) according to any one of claims 1 to 9, wherein the exhaust gas input device (10) is connected to the inlet of the first channel (2) of the valve body (40), so that the exhaust gas can flow out from the outlet of the first channel (2) and mix with air to form a mixed gas; a supercharging device (70), the supercharging device (70) being connected to the outlet of the first channel (2), and the supercharging device (70) being capable of supercharging the mixed gas; an intercooling device (60), the intercooling device (60) being connected to the supercharging device (70), and the intercooling device (60) being capable of cooling the supercharged mixed gas; Wherein, the supercharging device (70) or the intercooling device (60) is connected to the injection port (31) of the valve body (40).

Images