Bypass device for diesel engine tail gas purifier

Abstract

The utility model provides a bypass device for a diesel engine tail gas purifier, and relates to the field of diesel engine tail gas purifiers. The bypass device for the diesel engine tail gas purifier comprises a mechanical bypass valve and a DPF filter, the mechanical bypass valve comprises a stainless steel shell fixedly connected with the DPF filter, the inner wall of the stainless steel shell is in threaded connection with the outer circumferential face of an adjusting nut, and a pre-pressing valve is inserted into the inner wall of the adjusting nut; the outer circumferential face of the pre-pressing valve is sleeved with a high-temperature spring, the high-temperature spring is located between the pre-pressing valve and the adjusting nut, and a sealing ring is arranged between the stainless steel shell and the pre-pressing valve. According to the bypass device for the diesel engine tail gas purifier, through the arrangement of the mechanical bypass valve, the DPF filter, the stainless steel shell, the sealing ring, the pre-pressing valve, the high-temperature spring and the adjusting nut, the service life of the DPF filter can be effectively prolonged, the damage risk of the DPF filter is reduced, and therefore the market competitiveness of products is improved, and large-scale application and popularization are facilitated.

Description

Technical Field

[0001] This utility model relates to a bypass device, specifically a bypass device for a diesel engine exhaust gas purifier, belonging to the technical field of diesel engine exhaust gas purifiers. Background Technology

[0002] A diesel exhaust purifier is a device installed in the exhaust system of a diesel vehicle to reduce pollutant emissions in the vehicle's exhaust. It is often referred to as a "diesel exhaust purifier" or a "diesel three-way catalytic converter".

[0003] With the increasing stringent emission standards for diesel engines, the mainstream aftertreatment equipment for diesel exhaust systems is divided into DPF filters, which remove particulate matter from black smoke, and SCR filters, which remove nitrogen oxides. During use, the continuous accumulation of particulate matter in DPF filters leads to a continuous increase in exhaust back pressure. While new vehicle filters typically come with a built-in regeneration device, for older vehicles with retrofitted DPF filters, if they become clogged and are not promptly removed and regenerated, it can cause increased exhaust back pressure, leading to filter damage and even impacting engine lifespan. This makes it difficult to protect the lifespan of the DPF filter and reduce the risk of damage. Therefore, we provide a bypass device for diesel engine exhaust gas purifiers to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a bypass device for a diesel engine exhaust gas purifier to solve the above-mentioned problems, thereby addressing the difficulty in protecting the service life of the DPF filter and reducing the risk of DPF filter damage in the aforementioned prior art.

[0005] This utility model is achieved through the following technical solution: a bypass device for a diesel engine exhaust gas purifier, comprising a mechanical bypass valve and a DPF filter. The mechanical bypass valve includes a stainless steel housing fixedly connected to the DPF filter. The inner wall of the stainless steel housing is threadedly connected to the outer circumferential surface of an adjusting nut. A pre-pressure valve is inserted into the inner wall of the adjusting nut. A high-temperature spring is sleeved on the outer circumferential surface of the pre-pressure valve. The high-temperature spring is located between the pre-pressure valve and the adjusting nut. A sealing ring is provided between the stainless steel housing and the pre-pressure valve. The tight fit between the components can effectively protect the service life of the DPF filter and reduce the risk of damage to the DPF filter.

[0006] Preferably, a protective shell is fixedly connected to the outer circumferential surface of the DPF filter, and a one-way worm gear is rotatably connected to the inner wall of the protective shell. The one-way worm gear can effectively drive the planar worm wheel to rotate.

[0007] Preferably, the thread on the outer circumferential surface of the unidirectional worm gear meshes with the teeth on the outer circumferential surface of the planar worm wheel, the planar worm wheel is fixedly connected to the outer circumferential surface of the bidirectional screw, and the bidirectional screw is designed with bolts at both ends in opposite directions, so that the two strip-shaped tooth plates can move relative to each other.

[0008] Preferably, the outer circumferential surface of the bidirectional lead screw is threadedly connected to the inner wall of the strip toothed plate, and the strip toothed plate is slidably connected to the inner wall of the protective shell. The protective shell can effectively protect its internal components, preventing them from being disturbed by external factors.

[0009] Preferably, the teeth on one side of the strip toothed plate mesh with the teeth on the outer circumferential surface of the planar gear, and the planar gear is fixedly connected to the outer circumferential surface of the linkage column. The linkage column ensures that the planar gear and the U-shaped frame can rotate synchronously.

[0010] Preferably, the two ends of the linkage column are rotatably connected to the inner wall of the protective shell, and a U-shaped frame is fixedly connected to the outer circumferential surface of the linkage column. The U-shaped frame can effectively drive the movement of the T-shaped support leg.

[0011] Preferably, there are two U-shaped frames, and T-shaped legs are fixedly connected to one side of each U-shaped frame. The T-shaped legs can effectively support the DPF filter and the mechanical bypass valve.

[0012] This utility model provides a bypass device for a diesel engine exhaust gas purifier, which has the following beneficial effects:

[0013] 1. The bypass device used in this diesel engine exhaust gas purifier, through the setting of mechanical bypass valve, DPF filter, stainless steel shell, sealing ring, pre-pressure valve, high temperature spring and adjusting nut, can effectively extend the service life of DPF filter, reduce the risk of DPF filter damage, thereby enhancing the product's market competitiveness and facilitating its widespread use.

[0014] 2. The bypass device used in this diesel engine exhaust gas purifier, through the setting of a protective shell, a one-way worm gear, a flat worm wheel, a two-way lead screw, a strip toothed plate, a flat gear, a linkage column, a U-shaped frame, and a T-shaped support leg, can effectively achieve the effect of freely scaling the T-shaped support leg according to the actual installation scenario, thus making the device more practical. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a three-dimensional structural diagram of the internal structure of the protective shell of this utility model;

[0017] Figure 3 This is a three-dimensional structural schematic diagram of the mechanical bypass valve of this utility model;

[0018] Figure 4 This is an exploded structural diagram of the mechanical bypass valve of this utility model.

[0019] [Explanation of Key Component Symbols]

[0020] 1. Mechanical bypass valve; 2. DPF filter; 3. Stainless steel housing; 4. Sealing ring; 5. Pre-pressure valve; 6. High-temperature spring; 7. Adjusting nut; 8. Protective housing; 9. One-way worm gear; 10. Flat worm wheel; 11. Two-way lead screw; 12. Strip toothed plate; 13. Flat gear; 14. Linkage column; 15. U-shaped frame; 16. T-shaped support leg. Detailed Implementation

[0021] This utility model provides a bypass device for a diesel engine exhaust gas purifier.

[0022] Please see Figure 1 It includes a mechanical bypass valve 1 and a DPF filter 2. The DPF filter 2 is mainly used to filter harmful particulate matter in the exhaust gas and reduce emission pollution. The DPF filter 2 is existing technology and will not be described in detail.

[0023] Please see Figure 1 and Figure 2 The outer circumferential surface of the DPF filter 2 is fixedly connected to a protective shell 8. The purpose of setting the protective shell 8 is to effectively support multiple different components, thereby ensuring the stable movement of the components. The inner wall of the protective shell 8 is rotatably connected to a one-way worm gear 9. The protective shell 8 will apply a control effect to the one-way worm gear 9, ensuring that the one-way worm gear 9 can rotate in place within the protective shell 8.

[0024] Please see Figure 2 The thread on the outer circumferential surface of the one-way worm 9 meshes with the teeth on the outer circumferential surface of the planar worm wheel 10. The tight fit between the one-way worm 9 and the planar worm wheel 10 can effectively achieve the force transmission effect and has a strong self-locking effect, ensuring the stability of subsequent parts after movement and preventing slippage.

[0025] Please see Figure 2 The planar worm gear 10 is fixedly connected to the outer circumferential surface of the double-acting screw 11. The planar worm gear 10 and the double-acting screw 11 maintain a linkage effect. The outer circumferential surface of the double-acting screw 11 is threadedly connected to the inner wall of the strip toothed plate 12. The double-acting screw 11 is configured such that the threads at both ends of the double-acting screw 11 are opposite. Therefore, when the two strip toothed plates 12 are kept stable, the double-acting screw 11 can drive the two strip toothed plates 12 to move in opposite directions.

[0026] Please see Figure 2The teeth on one side of the strip toothed plate 12 mesh with the teeth on the outer circumferential surface of the planar gear 13. The tight fit between the strip toothed plate 12 and the planar gear 13 allows the planar gear 13 to rotate when the planar gear 13 remains stable due to the translation of the strip toothed plate 12. The planar gear 13 is fixedly connected to the outer circumferential surface of the linkage column 14, and the planar gear 13 and the linkage column 14 maintain the linkage effect.

[0027] Please see Figure 2 The two ends of the linkage column 14 are rotatably connected to the inner wall of the protective shell 8. The protective shell 8 supports the linkage column 14 and applies a control effect to ensure that the linkage column 14 can rotate in place. A U-shaped frame 15 is fixedly connected to the outer circumferential surface of the linkage column 14, and the linkage column 14 and the U-shaped frame 15 maintain a linkage effect.

[0028] Please see Figure 2 There are two U-shaped frames 15, and T-shaped legs 16 are fixedly connected to one side of each U-shaped frame 15. The cooperation between the U-shaped frames 15 and the T-shaped legs 16 can effectively achieve the effect of free scaling, so that the T-shaped legs 16 can support the overall structure according to the actual application and ensure stability during the support process. The strip toothed plate 12 is slidably connected to the inner wall of the protective shell 8. The protective shell 8 will apply a control effect to the strip toothed plate 12, so that the strip toothed plate 12 can only move horizontally within the protective shell 8. At the same time, the inner wall of the protective shell 8 is provided with a vertical plate, which can support the bidirectional screw 11 and apply a control effect to ensure that the bidirectional screw 11 can only rotate in place.

[0029] Please see Figure 1 , Figure 3 and Figure 4 The mechanical bypass valve 1 includes a stainless steel housing 3 fixedly connected to the DPF filter 2. The mechanical bypass valve 1 is mainly used to protect the service life of the DPF filter 2 and reduce the risk of damage to the DPF filter 2. The stainless steel housing 3 allows the mechanical bypass valve 1 to be used for a longer period of time. The inner wall of the stainless steel housing 3 is threaded to the outer circumferential surface of the adjusting nut 7. The tight fit between the stainless steel housing 3 and the adjusting nut 7 can achieve the effect of easy disassembly and assembly of the adjusting nut 7. Moreover, pressure can be applied to the high-temperature spring 6 according to the actual application conditions to select an appropriate preload force to control the mechanical bypass valve 1.

[0030] Please see Figure 1 , Figure 3 and Figure 4A pre-pressure valve 5 is inserted into the inner wall of the adjusting nut 7. A high-temperature spring 6 is sleeved on the outer circumference of the pre-pressure valve 5. The high-temperature spring 6 is located between the pre-pressure valve 5 and the adjusting nut 7. A sealing ring 4 is provided between the stainless steel shell 3 and the pre-pressure valve 5. The tight fit between the pre-pressure valve 5 and the sealing ring 4, through the pressure generated by the two, can effectively control the airtightness of the mechanical bypass valve 1.

[0031] Working Principle: In use, this device consists of a mechanical bypass valve 1 and a DPF filter 2. The mechanical bypass valve 1 comprises a stainless steel housing 3, a sealing ring 4, a pre-pressure valve 5, a high-temperature spring 6, and an adjusting nut 7. It allows the DPF filter 2 to continue operating for a period of time even when it cannot be cleaned immediately, ensuring that the exhaust back pressure does not continue to rise. Its simple structure facilitates assembly and protects the lifespan of the DPF filter 2, reducing the risk of damage. Furthermore, depending on the installation conditions, the one-way worm gear 9 can be manually rotated to adjust the pressure. The bidirectional lead screw 11, which is connected to the planar worm gear 10, is restricted by the vertical plate inside the protective housing 8 and can only rotate in place. Therefore, the unidirectional worm gear 9 can drive the bidirectional lead screw 11 to rotate in place through the planar worm gear 10, so that the strip toothed plate 12 can be translated inside the protective housing 8. This, in turn, drives the linkage column 14 to rotate in place inside the protective housing 8 through the planar gear 13, causing the T-shaped support leg 16 connected to the U-shaped frame 15 to move. At this time, the T-shaped support leg 16 is in a 90-degree rotation state. Thus, through the contact between the T-shaped support leg 16 and the ground, the DPF filter 2 can be supported, ensuring the stable effect of the DPF filter 2.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A bypass device for a diesel engine exhaust gas purifier, comprising a mechanical bypass valve (1) and a DPF filter (2), characterized in that: The mechanical bypass valve (1) includes a stainless steel housing (3) fixedly connected to the DPF filter (2). The inner wall of the stainless steel housing (3) is threaded to the outer circumferential surface of the adjusting nut (7). A pre-pressure valve (5) is inserted into the inner wall of the adjusting nut (7). A high-temperature spring (6) is sleeved on the outer circumferential surface of the pre-pressure valve (5). The high-temperature spring (6) is located between the pre-pressure valve (5) and the adjusting nut (7). A sealing ring (4) is provided between the stainless steel housing (3) and the pre-pressure valve (5).

2. The bypass device for a diesel engine exhaust gas purifier according to claim 1, characterized in that: The outer circumferential surface of the DPF filter (2) is fixedly connected to a protective shell (8), and the inner wall of the protective shell (8) is rotatably connected to a one-way worm gear (9).

3. A bypass device for a diesel engine exhaust gas purifier according to claim 2, characterized in that: The thread on the outer circumferential surface of the unidirectional worm (9) meshes with the teeth on the outer circumferential surface of the planar worm wheel (10), and the planar worm wheel (10) is fixedly connected to the outer circumferential surface of the bidirectional screw (11).

4. A bypass device for a diesel engine exhaust gas purifier according to claim 3, characterized in that: The outer circumferential surface of the bidirectional lead screw (11) is threadedly connected to the inner wall of the strip toothed plate (12), and the strip toothed plate (12) is slidably connected to the inner wall of the protective shell (8).

5. A bypass device for a diesel engine exhaust gas purifier according to claim 4, characterized in that: The teeth on one side of the strip toothed plate (12) mesh with the teeth on the outer circumferential surface of the planar gear (13), and the planar gear (13) is fixedly connected to the outer circumferential surface of the linkage column (14).

6. A bypass device for a diesel engine exhaust gas purifier according to claim 5, characterized in that: The two ends of the linkage column (14) are rotatably connected to the inner wall of the protective shell (8), and a U-shaped frame (15) is fixedly connected to the outer circumferential surface of the linkage column (14).

7. A bypass device for a diesel engine exhaust gas purifier according to claim 6, characterized in that: There are two U-shaped frames (15), and T-shaped legs (16) are fixedly connected to one side of each U-shaped frame (15).

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