An exhaust filter for a die casting machine and a filtering method

Abstract

The application relates to a waste gas filter for a die casting machine and a filtering method, and relates to the technical field of waste gas filtering of die casting machines. The waste gas filter comprises a shell, air inlets and air outlets are arranged at the top of the left and right ends of the shell, a filter core is arranged in the shell, an electrostatic oil remover is arranged in the central area of the shell, a flow resistance plate is arranged in the cavity on the left side of the electrostatic oil remover in the shell, and a flow pushing plate is slidably arranged in the cavity on the left side of the electrostatic oil remover in the shell. Through the airflow uniform assembly, the flow resistance plate and the flow pushing plate, the waste gas can be stored in the cavity in the shell by avoiding the waste gas directly passing through the flow guide plate, the waste gas in the cavity can uniformly pass through the flow guide plate and enter the filter material through the reciprocating movement of the flow pushing plate, the structure can make the waste gas form uniform airflow distribution before entering the filtering unit, the local flow rate is prevented from being too high or too low, and the overall utilization rate of the filter material is improved.

Description

Technical Field

[0001] This invention relates to the field of exhaust gas filtration technology for die casting machines, specifically to an exhaust gas filter and filtration method for die casting machines. Background Technology

[0002] In the die-casting industry, the die-casting machine is the core production equipment. Its operation involves multiple critical processes, including injection, pressure holding, mold opening, application of release agent, and cooling and part removal. These processes continuously generate large amounts of high-temperature mixed waste gas, which is a major source of pollutants in the die-casting production process. This waste gas has a complex composition and unique characteristics, posing a serious impact on the production environment, operator health, and equipment operation. It includes oil mist, metal fumes, fine particles, and volatile organic compounds formed by the volatilization of the release agent. This waste gas is characterized by high temperature, high oil content, fine dust particles, and easy adhesion and diffusion. It not only pollutes the workshop environment and affects the health of operators but also adheres to the surfaces of equipment and molds, affecting production stability. Furthermore, direct emission without treatment fails to meet environmental emission requirements.

[0003] When filtering exhaust gas, existing equipment suffers from uneven flow due to the lack of a flow guide structure within the exhaust gas filter. This results in some areas being overloaded while others are idle, creating an imbalance. Oil mist aerosols, fine metal particles, and other pollutants in the die-casting machine exhaust gas tend to concentrate on the filter media in areas with high flow rates and volumes, causing rapid saturation and blockage. Meanwhile, the filter media in areas with slower flow rates and volumes fails to perform its filtering function effectively, leading to extremely low overall filtration area utilization. Furthermore, as the die-casting machine exhaust gas enters the electrostatic oil removal area through the guide plate, it contains a large amount of high-temperature oily aerosols, dust, and tar-like substances. These substances continuously adhere to, accumulate, and harden on the inner wall of the guide plate, easily forming thick layers of grease and carbon deposits. This grease buildup reduces the cross-sectional area of ​​the guide plate's flow channel, increasing airflow resistance and system pressure loss, ultimately hindering exhaust gas transport.

[0004] To address the aforementioned issues, innovative design based on existing methods is urgently needed. Summary of the Invention

[0005] The purpose of this invention is to provide an exhaust gas filter and filtration method for a die-casting machine to solve the problems mentioned in the background. The technical solution of this invention addresses the problem that the existing technical solutions are too simplistic and provides a solution that is significantly different from the existing technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a waste gas filter and filtration method for a die-casting machine, comprising a housing, an air inlet and an air outlet respectively installed at the top of the left and right ends of the housing, a filter element installed inside the housing, an electrostatic precipitator installed in the central area inside the housing, a baffle plate installed inside the housing in the cavity on the left side of the electrostatic precipitator, the surface of the baffle plate being hollow and having several inclined baffles installed inside, the inclined baffles being arranged in a circumferential shape inside the baffle plate, a pusher plate sliding inside the housing in the cavity on the left side of the electrostatic precipitator, a rotating block connected to the inner wall of the left side of the housing via a motor, a linkage rod installed on the side end of the turntable, an airflow equalization component installed at one end of the linkage rod inside the baffle plate, and a striking mechanism provided on the surface of the inner side wall of the housing;

[0007] The airflow uniformity component includes an adjusting cylinder installed at one end of the linkage rod located inside the baffle plate. A fan blade is rotatably connected inside the adjusting cylinder. A push cylinder is limited and slidably mounted on the surface of the linkage rod. The right end of the push cylinder is limited and slidably mounted inside the adjusting cylinder. An abutting rod is installed at the right end of the push cylinder. A rotating ring is rotatably connected to the inner side wall of the adjusting cylinder. A rotating cylinder is sleeved on the inner surface of the adjusting cylinder where the fan blade is located.

[0008] The striking mechanism includes a turntable mounted on the inner side wall of the housing via a motor. An adjusting rod is mounted on the surface of the turntable, and a sliding table is provided on the surface of the adjusting rod. A tension rod is mounted on the end of the pusher plate away from the guide plate, and a push-pull rod is mounted on the end of the pusher plate near the guide plate. The sliding table is rotatably connected to the tension rod via a connecting rod. A fixed cylinder is installed inside the housing in the cavity on the left side of the electrostatic oil separator. A striking cylinder slides inside the fixed cylinder, and the push-pull rod slides within the striking cylinder.

[0009] Preferably, the filter element is located at the bottom of the air inlet, an air volume monitor is installed inside the air inlet, a guide plate is installed inside the housing, and the guide plate is located on the left and right sides of the electrostatic oil separator.

[0010] Preferably, an activated carbon adsorption layer is installed inside the housing in the cavity on the right side of the electrostatic oil separator.

[0011] Preferably, the pusher plate has a conical leakage hole inside, and the opening of the leakage hole at the end away from the guide plate is larger than the diameter of the hole at the end of the pusher plate closer to the guide plate.

[0012] Preferably, a distance sensor is installed inside the adjusting cylinder, an extrusion plate is installed on the surface of the contact rod, the surface of the extrusion plate is designed to be inclined, a spiral groove is opened on the surface of the rotating cylinder, and a protrusion is provided on the inner surface of one end of the fan blade located in the adjusting cylinder. The protrusion slides within the spiral groove on the surface of the rotating cylinder. A protrusion is installed on the end of the rotating cylinder near the extrusion plate, and the protrusion abuts against the inclined surface of the extrusion plate. A spring is installed on the end of the rotating cylinder near the inner wall of the adjusting cylinder, and the other end of the spring is connected to the rotating ring. A miniature drive rod is installed on the side end of the rotating block, and the extended end of the miniature drive rod is connected to the left end of the push cylinder.

[0013] Preferably, the slide table has a notch on its surface, and a slide table is slidably limited within the notch. A contact block is installed on the side end of the slide table via a thin rod, and a spring is installed on the surface of the thin rod. A miniature electric push rod is installed inside the turntable. An inclined surface is provided on the side end of the contact block, and the extended end of the miniature electric push rod abuts against the inclined surface of the contact block.

[0014] Preferably, two ring plates are installed inside the fixed cylinder, and the protrusion on the surface of the striking cylinder slides within the ring plates. Springs are installed on the side of each ring plate near the protrusion, and the other end of the springs is connected to the protrusion on the surface of the striking cylinder. Springs are installed on both ends of the push-pull rod inside the striking cylinder at the protrusion plate, and the other end of the springs is connected to the side walls on both sides inside the striking cylinder.

[0015] Preferably, the method includes the following steps:

[0016] S1: Exhaust gas is initially filtered through the filter element at the air inlet. The motor drives the regulating cylinder to rotate the fan blades and send the gas into the left cavity. After passing through the guide plate, it is purified by the electrostatic oil separator and the activated carbon adsorption layer and discharged from the air outlet.

[0017] S2: The turntable drives the adjusting rod, which causes the tension rod to drive the pusher plate to slide back and forth, pushing the exhaust gas evenly across the guide plate; the pusher plate simultaneously drives the knocking cylinder to elastically knock the guide plate.

[0018] S3: When the exhaust gas volume is large, the micro drive rod and the micro electric push rod are linked to increase the fan blade conveying speed and the propulsion amount of the push plate, while increasing the striking force of the striking tube.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. This invention, through the arrangement of airflow equalization components, flow-blocking plates, and flow-pushing plates, prevents exhaust gas from directly passing through the guide plate, allowing the exhaust gas to be stored in the cavity inside the housing. The reciprocating movement of the flow-pushing plates ensures that the exhaust gas in the cavity passes evenly through the guide plate and enters the filter media. This structure creates a uniform airflow distribution before the exhaust gas enters the filtration unit, preventing excessively high or low local flow velocities, improving the overall utilization rate of the filter media, avoiding localized filter media overload and underutilization of other filter media, and enhancing filtration efficiency and purification effect. Simultaneously, it reduces the direct impact of exhaust gas on the guide plate, reduces the adhesion and residue of oil on the inner wall of the guide plate, extends the service life of the guide plate and filter media, and reduces equipment maintenance frequency.

[0021] 2. This invention, by setting up a striking mechanism and a guide plate, can simultaneously and elastically strike the surface of the guide plate while the pusher plate is reciprocating, causing the guide plate to generate continuous and uniform micro-vibrations. This effectively disrupts the adhesion conditions of oil mist, oil stains, dust, and carbon deposits on the inner wall of the guide plate, preventing them from accumulating, drying, and hardening on the plate surface. On the one hand, this structure can continuously keep the inner wall of the guide plate clean and unobstructed, preventing oil stains and carbon deposits from clogging the flow channel and reducing the air passage area, ensuring long-term stable airflow, and avoiding problems such as increased air pressure, decreased air volume, and airflow deviation caused by local blockage. It ensures that the exhaust gas is evenly distributed and runs smoothly when entering the filter material and electrostatic oil removal area. Furthermore, the elastic striking can cause the oil stains attached to the guide plate to fall off in time, and they will be discharged downwards under their own weight and airflow, greatly reducing the probability of oil stains drying and coking, significantly reducing the frequency of equipment downtime for cleaning and maintenance, extending the continuous working time of the equipment, and reducing operation and maintenance costs. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a cross-sectional structural diagram of the present invention from one perspective;

[0024] Figure 3 This is a cross-sectional structural schematic diagram from another perspective of the present invention;

[0025] Figure 4 This is a schematic diagram of the internal structure of the guide plate and electrostatic oil separator of the present invention;

[0026] Figure 5 This is a partial structural diagram of the regulating cylinder and fan blades of the present invention;

[0027] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A;

[0028] Figure 7 This is a schematic diagram showing the disassembled structure of the extrusion plate, rotating ring, and rotating cylinder of the present invention;

[0029] Figure 8 This is a partial structural schematic diagram of the jet propulsion plate of the present invention;

[0030] Figure 9 This is a schematic diagram of the structure of the turntable, adjusting rod, and slide table of the present invention;

[0031] Figure 10 This is a cross-sectional structural diagram of the fixing cylinder and the striking cylinder of the present invention.

[0032] In the diagram: 1. Housing; 2. Air inlet; 3. Air outlet; 4. Filter element; 5. Guide plate; 6. Electrostatic oil separator; 7. Activated carbon adsorption layer; 8. Baffle plate; 9. Push plate; 10. Linkage rod; 111. Adjusting cylinder; 112. Fan blade; 113. Push cylinder; 114. Abutment rod; 115. Extrusion plate; 116. Rotary ring; 117. Rotary cylinder; 118. Distance sensor; 119. Miniature drive rod; 121. Turntable; 122. Adjusting rod; 123. Slide table; 124. Abutment block; 125. Miniature electric push rod; 126. Tension rod; 127. Fixed cylinder; 128. Striking cylinder; 129. Push-pull rod; 120. Ring plate. Detailed Implementation

[0033] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0034] Please see Figures 1-10This invention provides a technical solution: a waste gas filter and filtration method for a die-casting machine. An air inlet 2 and an air outlet 3 are respectively installed at the top of the left and right ends of a housing 1. An activated carbon adsorption layer 7 is installed inside the housing 1 in the cavity to the right of an electrostatic precipitator 6. Several inclined baffles are installed inside a baffle plate 8, arranged circumferentially within the baffle plate 8. A filter element 4 is installed inside the housing 1, located at the bottom of the air inlet 2. An air volume monitor is installed inside the air inlet 2. A guide plate 5 is installed inside the housing 1, located on the left and right sides of the electrostatic precipitator 6. An electrostatic precipitator 6 is installed in the central area inside the housing 1. A baffle plate 8 is installed in the left cavity of the oil separator 6. The surface of the baffle plate 8 is hollow and several inclined baffles are installed inside. The inclined baffles are arranged in a circular shape inside the baffle plate 8. A pusher plate 9 slides inside the left cavity of the electrostatic oil separator 6 inside the housing 1. A conical leakage hole is opened inside the pusher plate 9. The opening of the leakage hole inside the pusher plate 9 away from the guide plate 5 is larger than the hole diameter of the leakage hole inside the pusher plate 9 near the guide plate 5. A rotating block is connected to the left inner wall of the housing 1 through a motor. A linkage rod 10 is installed on the side end of the turntable. An airflow equalization component is installed at the end of the linkage rod 10 inside the baffle plate 8. A knocking mechanism is provided on the surface of the inner side wall of the housing 1.

[0035] The waste gas from the die-casting machine is injected into the air inlet 2. At this time, the waste gas inside the air inlet 2 is filtered through the filter element 4 and then enters the housing 1. Subsequently, the motor drives the linkage rod 10 to rotate the regulating cylinder 111. At this time, the regulating cylinder 111 drives the fan blade 112 to rotate, so that the gas after the initial filtration is injected into the left cavity inside the housing 1 from the side of the baffle plate 8. The gas in the left cavity passes through the guide plate 5 and enters the middle cavity of the housing 1. At this time, the electrostatic oil separator 6 removes the oil stains inside the gas. The gas after the oil stains are removed enters the activated carbon adsorption layer 7 and is then discharged through the air outlet 3.

[0036] In one embodiment of the present invention, the airflow uniform assembly includes an adjusting cylinder 111 installed at one end of the linkage rod 10 located inside the baffle plate 8. A fan blade 112 is rotatably connected inside the adjusting cylinder 111. A push cylinder 113 is slidably limited on the surface of the linkage rod 10. The right end of the push cylinder 113 is slidably limited inside the adjusting cylinder 111. An abutment rod 114 is installed at the right end of the push cylinder 113. A rotating ring 116 is rotatably connected to the inner sidewall of the adjusting cylinder 111. A rotating cylinder 117 is sleeved on the inner surface of the fan blade 112. A distance sensor 118 is installed inside the adjusting cylinder 111. A pressing plate 115 is installed on the surface of the abutment rod 114. The surface of the pressing plate 115 is inclined. A spiral groove is formed on the surface of the rotating cylinder 117. A protrusion is provided on the inner surface of the fan blade 112 at one end of the adjusting cylinder 111, and the protrusion is slidably limited within the spiral groove on the surface of the rotating cylinder 117. A protrusion is installed on one end of the cylinder 117 near the extrusion plate 115, and the protrusion abuts against the inclined surface of the extrusion plate 115. A spring is installed on one end of the rotating cylinder 117 near the inner wall of the adjusting cylinder 111, and the other end of the spring is connected to the rotating ring 116. A miniature drive rod 119 is installed on the side end of the rotating block, and the extended end of the miniature drive rod 119 is connected to the left end of the push cylinder 113. The airflow uniform component, the flow baffle 8, and the pusher plate 9 can prevent the exhaust gas from passing directly through the guide plate 5, so that the exhaust gas can be stored in the cavity inside the housing 1. Through the reciprocating movement of the pusher plate 9, the exhaust gas in the cavity can pass evenly through the guide plate 5 and enter the filter media. This structure can form a uniform airflow distribution before the exhaust gas enters the filtration unit, avoid local flow velocity being too high or too low, improve the overall utilization rate of the filter media, avoid the problem of local filter media overload and the underutilization of other filter media, and improve filtration efficiency and purification effect.

[0037] In one embodiment of the present invention, the striking mechanism includes a turntable 121 mounted on the inner side wall of the housing 1 via a motor. An adjusting rod 122 is mounted on the surface of the turntable 121, and a slide 123 is provided on the surface of the adjusting rod 122. A tension rod 126 is mounted on the end of the pusher plate 9 away from the guide plate 5, and a push-pull rod 129 is mounted on the end of the pusher plate 9 near the guide plate 5. The slide 123 is rotatably connected to the tension rod 126 via a connecting rod. A fixed cylinder 127 is installed inside the housing 1 in the cavity on the left side of the electrostatic precipitator 6. A striking cylinder 128 slides inside the fixed cylinder 127. The push-pull rod 129 slides within the striking cylinder 128. A notch is provided on the surface of the slide 123, and the slide 129 slides within the notch. 3. A contact block 124 is installed on the side of the slide table 123 via a thin rod, and a spring is installed on the surface of the thin rod; a miniature electric push rod 125 is installed inside the turntable 121, and an inclined surface is opened on the side of the contact block 124. The extended end of the miniature electric push rod 125 abuts against the inclined surface of the contact block 124. Two ring plates 120 are installed inside the fixed cylinder 127. The protrusion on the surface of the striking cylinder 128 slides within the ring plates 120. Springs are installed on the side of the two ring plates 120 near the protrusion, and the other end of the spring is connected to the protrusion on the surface of the striking cylinder 128; springs are installed on both ends of the push-pull rod 129 inside the striking cylinder 128, and the other end of the spring is connected to the two side walls inside the striking cylinder 128.

[0038] The turntable 121 drives the adjusting rod 122 on its surface to rotate. The slide 123 inside the adjusting rod 122 pulls the tension rod 126 back and forth through the connecting rod. While the tension rod 126 moves back and forth, it drives the pusher plate 9 to slide back and forth within the left cavity inside the housing 1, thereby pushing the exhaust gas inside the left cavity of the housing 1 through the guide plate 5 to ensure the uniformity of exhaust gas filtration. When the pusher plate 9 is pulled back, the internal leakage hole of the pusher plate 9 is conical to avoid the backflow of exhaust gas. At the same time as the pusher plate 9 is pushed out, it drives the push-pull rod 129 to slide inside the striking cylinder 128. The springs on both sides of the protrusion at the end of the push-pull rod 129 inside the striking cylinder 128 apply power to the striking cylinder 128, so that the striking cylinder 128 is in contact with the target. The guide plate 5 is elastically struck, while the internal springs of the two sets of ring plates 120 provide the restoring force to the striking cylinder 128. While the pusher plate 9 moves back and forth, it simultaneously strikes the surface of the guide plate 5 elastically, causing the guide plate 5 to generate continuous and uniform micro-amplitude vibrations. This effectively breaks the adhesion conditions of oil mist, oil stains, dust and carbon deposits on the inner wall of the guide plate 5, preventing them from accumulating, drying and hardening on the plate surface. This structure can continuously keep the inner wall of the guide plate 5 clean and unobstructed, prevent oil stains and carbon deposits from clogging the flow channel and reducing the air passage area, ensure long-term stable airflow, and avoid problems such as increased wind pressure, decreased air volume and airflow deviation caused by local blockage. It ensures that the exhaust gas is evenly distributed and operates smoothly when entering the filter material and electrostatic oil removal area.

[0039] As one embodiment of the present invention, the method includes the following steps:

[0040] S1: The exhaust gas is initially filtered through the filter element 4 from the air inlet 2. The motor drives the regulating cylinder 111 to rotate the fan blade 112 and send the gas into the left cavity. After passing through the guide plate 5, it is purified by the electrostatic oil separator 6 and the activated carbon adsorption layer 7 and discharged from the air outlet 3.

[0041] S2: The turntable 121 drives the adjusting rod 122, causing the tension rod 126 to drive the pusher plate 9 to slide back and forth, pushing the exhaust gas evenly across the guide plate 5; the pusher plate 9 simultaneously drives the striking cylinder 128 to elastically strike the guide plate 5.

[0042] S3: When the exhaust gas volume is large, the micro drive rod 119 and the micro electric push rod 125 are linked to increase the conveying speed of the fan blade 112 and the pushing amount of the pusher plate 9, while increasing the striking force of the striking cylinder 128.

[0043] Working principle: During operation, the waste gas from the die-casting machine is first injected into the air inlet 2. At this time, the waste gas inside the air inlet 2 is injected into the housing 1 through the initial filtration of the filter element 4. Then, the motor drives the linkage rod 10 to drive the regulating cylinder 111 to rotate. At this time, the regulating cylinder 111 drives the fan blade 112 to rotate, so that the gas after the initial filtration is injected into the left cavity inside the housing 1 from the side of the baffle plate 8. The gas in the left cavity passes through the guide plate 5 and enters the middle cavity of the housing 1. At this time, the electrostatic oil separator 6 removes the oil stains inside the gas. The gas after the oil stains are removed enters the activated carbon adsorption layer 7 and is discharged through the air outlet 3.

[0044] While the motor drives the regulating cylinder 111 to rotate, another motor drives the turntable 121 to rotate. At this time, the turntable 121 drives the regulating rod 122 on its surface to rotate. The sliding table 123 inside the regulating rod 122 pulls the tension rod 126 to move back and forth through the connecting rod. While the tension rod 126 moves back and forth, it drives the push plate 9 to slide back and forth in the left cavity inside the housing 1, thereby pushing the exhaust gas inside the left cavity inside the housing 1 through the guide plate 5 to ensure the uniformity of exhaust gas filtration. When the push plate 9 is pulled back, the leakage hole inside the push plate 9 is conical, which can avoid the exhaust gas from being carried back. When the push plate 9 is pushed out, it drives the push-pull rod 129 to slide inside the striking cylinder 128. The springs on both sides of the protrusion plate at the end of the push-pull rod 129 are inside the striking cylinder 128, which applies power to the striking cylinder 128, so that the striking cylinder 128 elastically strikes the guide plate 5. The springs inside the two sets of ring plates 120 provide the striking cylinder 128 with the elastic force for reset.

[0045] When the gas volume monitor detects a large amount of exhaust gas from the die-casting machine, the push cylinder 113 is moved by the extended end of the micro drive rod 119. As the push cylinder 113 moves, it abuts against the rotating cylinder 117 through the inclined surface of the extrusion plate 115, causing the protrusion on the inner surface of the adjusting cylinder 111 to slide within the spiral groove on the surface of the rotating cylinder 117, causing the fan blade 112 to deflect, thereby increasing the conveying speed of the exhaust gas. At the same time, the distance sensor 118 detects the movement of the abutment rod 114 and drives the extended end of the micro electric push rod 125 to press against the abutment block 124, causing the slide table 123 to slide outward within the notch on the surface of the adjusting rod 122, thereby increasing the reciprocating distance of the tension rod 126, increasing the amount of exhaust gas pushed into the cavity on the left side of the housing 1, and increasing the elastic striking force of the striking cylinder 128 on the guide plate 5.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An exhaust gas filter for a die-casting machine, comprising a housing (1), characterized in that: The top of the left and right ends of the housing (1) are respectively equipped with an air inlet (2) and an air outlet (3). A filter element (4) is installed inside the housing (1). An electrostatic oil separator (6) is installed in the central area inside the housing (1). A baffle plate (8) is installed inside the housing (1) in the cavity on the left side of the electrostatic oil separator (6). The surface of the baffle plate (8) is hollow, and several inclined baffles are installed inside. The several inclined baffles are arranged in a circular pattern inside the baffle plate (8). A pusher plate (9) slides inside the housing (1) in the cavity on the left side of the electrostatic oil separator (6). A rotating block is connected to the inner wall of the left side of the housing (1) by a motor. A linkage rod (10) is installed on the side end of the rotating block. An airflow equalization component is installed at one end of the linkage rod (10) inside the baffle plate (8). A knocking mechanism is provided on the surface of the inner side wall of the housing (1). The airflow uniformity component includes an adjusting cylinder (111) installed at one end of the linkage rod (10) inside the baffle plate (8). A fan blade (112) is rotatably connected inside the adjusting cylinder (111). A push cylinder (113) is slidably limited on the surface of the linkage rod (10). The right end of the push cylinder (113) is slidably limited inside the adjusting cylinder (111). An abutment rod (114) is installed at the right end of the push cylinder (113). A rotating ring (116) is rotatably connected to the inner side wall of the adjusting cylinder (111). A rotating cylinder (117) is sleeved on the inner surface of the fan blade (112) inside the adjusting cylinder (111). A pressing plate (115) is installed on the surface of the abutment rod (114). The surface of the extrusion plate (115) is inclined. The surface of the rotating cylinder (117) is provided with a spiral groove. The fan blade (112) is located on the inner surface of one end of the adjusting cylinder (111) with a protrusion. The protrusion slides within the spiral groove on the surface of the rotating cylinder (117). A protrusion is installed on one end of the rotating cylinder (117) near the extrusion plate (115). The protrusion abuts against the inclined surface of the extrusion plate (115). A spring is installed on one end of the rotating cylinder (117) near the inner wall of the adjusting cylinder (111). The other end of the spring is connected to the rotating ring (116). A miniature drive rod (119) is installed on the side end of the rotating block. The extended end of the miniature drive rod (119) is connected to the left end of the push cylinder (113). The striking mechanism includes a turntable (121) mounted on the inner side wall of the housing (1) via a motor. An adjusting rod (122) is mounted on the surface of the turntable (121), and a slide (123) is provided on the surface of the adjusting rod (122). A tension rod (126) is mounted on the end of the pusher plate (9) away from the guide plate (5), and a push-pull rod (129) is mounted on the end of the pusher plate (9) near the guide plate (5). The slide (123) is rotatably connected to the tension rod (126) via a connecting rod. The housing (1) contains... A fixed cylinder (127) is installed in the cavity on the left side of the electrostatic oil separator (6). A striking cylinder (128) slides inside the fixed cylinder (127). The push-pull rod (129) slides within the striking cylinder (128). Through the set airflow uniform component, the flow baffle (8) and the flow pusher (9), the exhaust gas is prevented from passing directly through the guide plate (5), so that the exhaust gas can be stored in the cavity inside the shell (1). Through the reciprocating movement of the flow pusher (9), the exhaust gas in the cavity can pass evenly through the guide plate (5).

2. The exhaust gas filter for a die-casting machine according to claim 1, characterized in that: The filter element (4) is located at the bottom of the air inlet (2). An air volume monitor is installed inside the air inlet (2). A guide plate (5) is installed inside the housing (1). The guide plate (5) is located on the left side of the electrostatic oil separator (6).

3. The exhaust gas filter for a die-casting machine according to claim 2, characterized in that: An activated carbon adsorption layer (7) is installed inside the shell (1) in the cavity on the right side of the electrostatic oil separator (6).

4. The exhaust gas filter for a die-casting machine according to claim 3, characterized in that: The pusher plate (9) has a conical hole inside. The opening of the hole at the end away from the guide plate (5) is larger than the hole diameter at the end of the hole close to the guide plate (5).

5. The exhaust gas filter for a die-casting machine according to claim 4, characterized in that: The position distance sensor (118) is installed inside the regulating cylinder (111).

6. The exhaust gas filter for a die-casting machine according to claim 5, characterized in that: The adjusting rod (122) has a notch on its surface, and a sliding table (123) is limited to slide within the notch. A contact block (124) is installed on the side of the sliding table (123) via a thin rod, and a spring is installed on the surface of the thin rod. A miniature electric push rod (125) is installed inside the turntable (121). An inclined surface is opened on the side of the contact block (124), and the extended end of the miniature electric push rod (125) abuts against the inclined surface of the contact block (124).

7. The exhaust gas filter for a die-casting machine according to claim 6, characterized in that: The fixed cylinder (127) has two ring plates (120) installed inside. The protrusion on the surface of the striking cylinder (128) slides within the ring plates (120) and is limited. Both ring plates (120) are equipped with springs on the side near the protrusion, and the other end of the springs is connected to the protrusion on the surface of the striking cylinder (128). The push-pull rod (129) is located inside the striking cylinder (128) and has springs installed at both ends of the protrusion plate, and the other end of the springs is connected to the two side walls inside the striking cylinder (128).

8. A filtration method for an exhaust gas filter used in a die-casting machine, applicable to the exhaust gas filter used in a die-casting machine as described in claim 7, characterized in that: The method includes the following steps: S1: The exhaust gas is initially filtered through the filter element (4) from the air inlet (2). The motor drives the regulating cylinder (111) to rotate the fan blade (112) and send the gas into the left cavity. After passing through the guide plate (5), it is purified by the electrostatic oil separator (6) and the activated carbon adsorption layer (7) and discharged from the air outlet (3). S2: The turntable (121) drives the adjusting rod (122), causing the tension rod (126) to drive the pusher plate (9) to slide back and forth, pushing the exhaust gas evenly across the guide plate (5); the pusher plate (9) simultaneously drives the striking cylinder (128) to elastically strike the guide plate (5). S3: When the exhaust gas volume is large, the micro drive rod (119) and the micro electric push rod (125) are linked to increase the conveying speed of the fan blade (112) and the propulsion of the push plate (9), while increasing the striking force of the striking cylinder (128).

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