Tail gas treatment device for monorail crane explosion-proof diesel engine

Abstract

The invention discloses a tail gas treatment device for a monorail crane explosion-proof diesel engine, and relates to the technical field of diesel engine tail gas treatment, the tail gas treatment device comprises a shell and a catalytic ceramic block, a gas inlet pipe is arranged on one side of the shell, a gas outlet pipe is arranged on the other side of the shell, and the tail gas treatment device further comprises a center transition pipe and a pressurization mechanism; the gas outlet pipe is communicated with the gas inlet pipe through a central transition pipe, a plurality of honeycomb holes are uniformly distributed in the catalytic ceramic block, a linkage opening and closing valve is arranged between the central transition pipe and the gas inlet pipe, and the pressurizing mechanism is arranged in the central transition pipe. An electric telescopic rod blocks the bottoms of honeycomb holes of a catalytic ceramic block through a blocking bottom plate, meanwhile, due to the fact that the blocking bottom plate rises, a blocking plate rotates to block a communicating hole between an air inlet pipe and a center transition pipe, a closed space is formed, the catalytic ceramic block compresses entering tail gas conveniently, tail gas pressurization is achieved, and the service life of the catalytic ceramic block is prolonged. Therefore, the contact frequency of the catalyst surface and reactants is improved, and the reaction rate is accelerated.

Description

Technical Field

[0001] The present invention relates to the technical field of diesel engine exhaust gas treatment, and particularly relates to an exhaust gas treatment device for an explosion-proof diesel engine of a single-track crane. Background Art

[0002] The explosion-proof diesel engine of a single-track crane refers to the power equipment used by the lifting equipment suspended on a single track, generally applied to the internal transportation in mines or factories. However, diesel engines are prone to incomplete combustion, resulting in exhaust gas containing a large amount of harmful gases. For such limited spaces in mines and factories, the pollution hazard is relatively serious, and exhaust gas treatment is required.

[0003] When the existing diesel engine conducts exhaust gas treatment, the exhaust gas treatment device is connected to the exhaust gas discharge end of the diesel engine, and the exhaust gas is guided through a honeycomb ceramic part arranged through a pipeline. The honeycomb ceramic part contains a catalyst and an oxidant, so as to facilitate the catalytic oxidation reaction of harmful gases such as carbon monoxide and achieve purification treatment.

[0004] The deficiencies of the existing diesel engine exhaust gas treatment device are as follows: Although the existing diesel engine exhaust gas treatment device can rely on the arranged honeycomb ceramic part to conduct reaction treatment on the passing exhaust gas, the exhaust gas cannot be guaranteed to react fully when passing through. Because when the exhaust gas flows through the honeycomb holes on the ceramic part, the flow velocity, air pressure, and motion state of the gas cannot change, and all directly flow through. The contact degree between the gas and the catalyst surface cannot be guaranteed, so the exhaust gas reaction purification efficiency cannot be guaranteed. Summary of the Invention

[0005] The purpose of the present invention is to provide an exhaust gas treatment device for an explosion-proof diesel engine of a single-track crane, so as to solve the technical problem that the exhaust gas reaction treatment efficiency of the existing diesel engine exhaust gas treatment device is average.

[0006] The technical problem to be solved by the present invention can be achieved through the following technical solutions:

[0007] An exhaust gas treatment device for an explosion-proof diesel engine of a single-track crane includes a housing and a catalytic ceramic block. An air inlet pipe is arranged on one side of the housing, and an air outlet pipe is arranged on the other side. It further includes:

[0008] A central transition pipe. The air outlet pipe and the air inlet pipe are communicated through the central transition pipe. The catalytic ceramic block is slidably arranged inside the central transition pipe close to the air inlet pipe. A plurality of honeycomb holes are evenly distributed on the catalytic ceramic block. A linkage opening and closing valve is arranged between the central transition pipe and the air inlet pipe;

[0009] Pressurizing mechanism, the pressurizing mechanism is arranged in the central transition pipe, and the pressurizing mechanism includes a sealing bottom plate. The pressurizing mechanism fits the bottom of the catalytic ceramic block through the sealing bottom plate, and pushes the catalytic ceramic block to slide along the central transition pipe towards the direction close to the intake pipe. The linkage opening and closing valve can seal the connection position between the central transition pipe and the intake pipe.

[0010] As a further solution of the present invention: the pressurizing mechanism further includes an electric telescopic rod and a vibration mechanism. The electric telescopic rod is fixedly installed on one side of the bottom of the central transition pipe. The sealing bottom plate is fixedly connected to the telescopic end of the electric telescopic rod. The sealing bottom plate is horizontally located below the catalytic ceramic block. The vibration mechanism is used to vibrate the gas pressurized between the catalytic ceramic block and the central transition pipe.

[0011] As a further solution of the present invention: the vibration mechanism includes an impact member and an elastic rod. A plurality of elastic rods are fixedly arranged on the inner top of the side of the central transition pipe close to the intake pipe. A plurality of blocking balls are evenly distributed on each elastic rod. A plurality of impact members are arranged and distributed on the sealing bottom plate. The impact members, honeycomb holes, and elastic rods are aligned and distributed.

[0012] As a further solution of the present invention: the impact member includes a support rod and an impact ball. The support rod is vertically and fixedly arranged on the sealing bottom plate. The impact ball is fixedly connected to the top of the support rod, and the impact ball cooperates with the blocking balls distributed on the corresponding elastic rod.

[0013] As a further solution of the present invention: a cleaning soft brush is further arranged at the bottom of each elastic rod.

[0014] As a further solution of the present invention: a limiting block is fixedly connected to the inner wall of the central transition pipe, and the limiting block is arranged to cooperate below the catalytic ceramic block.

[0015] As a further solution of the present invention: the linkage opening and closing valve includes a communication hole, a sealing baffle, and a traction mechanism. The communication hole is arranged at the connection position between the intake pipe and the central transition pipe. An installation cavity communicating with the communication hole is also opened at the connection position between the central transition pipe and the intake pipe. Two sealing baffles are arranged and symmetrically distributed in the installation cavity. The top of each sealing baffle is rotatably connected to the inner wall of the installation cavity. The position close to the bottom of each sealing baffle is cooperatively connected to the sealing bottom plate through a traction mechanism.

[0016] As a further solution of the present invention: the traction mechanism includes traction wires and steering wheels. Two traction wires are arranged. One end of each traction wire is connected to the position close to the bottom of the sealing baffle, and the other end penetrates through the inner wall of the central transition pipe close to the top and is connected to the sealing bottom plate. Two steering wheels are arranged and distributed and rotatably connected to both sides of the inner wall of the installation cavity. Each traction wire bypasses the corresponding steering wheel respectively.

[0017] As a further solution of the present invention: a rotating pressure plate is arranged directly below the plugging bottom plate, and one side of the rotating pressure plate is movably connected to the inner wall of the central transition pipe through a resilient hinge.

[0018] As a further solution of the present invention: auxiliary detachable end caps are arranged on both sides of the bottom of the central transition pipe, and a main detachable end cap is arranged on the side wall of the housing.

[0019] Beneficial effects of the present invention:

[0020] 1. When the exhaust gas generated by the diesel engine is introduced into the central transition pipe through the intake pipe in the present invention, the continuously telescopic electric telescopic rod pushes the catalytic ceramic block serving as a catalyst carrier to rise through the plugging bottom plate. During this process, the plugging bottom plate blocks the bottom of the honeycomb holes of the catalytic ceramic block. At the same time, since the plugging bottom plate rises, it realizes the rotation and plugging of the baffle plate to block the communication hole between the intake pipe and the central transition pipe by releasing the traction wire, forming a closed space, which is convenient for the catalytic ceramic block to compress the incoming exhaust gas, realizing exhaust gas pressurization. Pressurization will cause the concentration of exhaust gas per unit volume to rise, thereby facilitating the increase of the contact frequency between the catalyst surface and the reactants, and thus accelerating the reaction rate.

[0021] 2. During the process of the plugging bottom plate pushing the catalytic ceramic block to slide and rise in the present invention, the support rods distributed on the bottom sealing plate are correspondingly inserted into each honeycomb hole. And when the catalytic ceramic block rises to a certain position, the elastic rods distributed on the inner top of one side of the central transition pipe are inserted into the honeycomb holes relatively. And the blocking balls distributed on the elastic rods collide with the impact balls at the ends of the support rods, causing the elastic rods to deform and generate vibration. In this way, relying on the vibration effect, the laminar boundary layer of the gas is destroyed, the gas turbulence intensity is increased, and the gas-solid contact efficiency is improved, thereby facilitating the exhaust gas to contact the catalyst and undergo catalytic oxidation reaction.

[0022] 3. A cleaning soft brush is arranged at the end of the elastic rod in the present invention. After the elastic rod is inserted into the honeycomb hole, the cleaning soft brush effectively cleans the inner wall of the honeycomb hole in cooperation with the vibration effect, avoiding the attachment of impurities, affecting the contact reaction between the gas and the catalyst on the inner wall of the honeycomb hole, and at the same time avoiding the blockage of the honeycomb hole, affecting the use, and reducing the later cleaning and maintenance operations. Description of the drawings

[0023] The following further describes the present invention with reference to the drawings.

[0024] Figure 1 is the overall structural schematic diagram of the present invention;

[0025] Figure 2 is the structural schematic diagram of the cooperation connection between the central transition pipe, the intake pipe and the exhaust pipe in the present invention;

[0026] Figure 3It is a schematic diagram of the overall sectional structure of the present invention;

[0027] Figure 4 is Figure 3 an enlarged structural diagram of part A in

[0028] Figure 5 a structural diagram showing the relative position distribution of the catalytic ceramic block, the plugging bottom plate and the elastic rod in the present invention;

[0029] Figure 6 a structural diagram of the elastic rod in the present invention;

[0030] Figure 7 a partial sectional structural diagram showing the cooperation between the sealing baffle and the communication hole in the present invention;

[0031] Figure 8 a top view structural diagram showing the cooperative connection between the sealing baffle and the traction wire in the present invention;

[0032] Figure 9 a state diagram when the plugging bottom plate jacks up the catalytic ceramic block in the present invention;

[0033] Figure 10 is Figure 9 an enlarged structural diagram of part B in

[0034] In the figure: 1. housing; 2. intake pipe; 3. exhaust pipe; 4. central transition pipe; 5. electric telescopic rod; 6. secondary detachable end cover; 7. catalytic ceramic block; 8. elastic rod; 9. communication hole; 10. rotating pressing plate; 11. plugging bottom plate; 12. support rod; 13. impact ball; 14. honeycomb hole; 15. traction wire; 16. limit stop block; 17. ball stopper; 18. cleaning soft brush; 19. installation cavity; 20. sealing baffle; 21. steering wheel; 22. main detachable end cover; 23. convex block. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0036] Such as Figures 1 - 10As shown in the figure, an exhaust gas treatment device for an explosion-proof diesel engine of a single-track crane includes a housing 1 and a catalytic ceramic block 7. An intake pipe 2 is provided on one side of the housing 1, and an exhaust pipe 3 is provided on the other side. The intake pipe 2 is connected to the exhaust gas discharge end of the diesel engine. A catalyst is added during the manufacture of the catalytic ceramic block 7, that is, the catalytic ceramic block 7 is a catalyst carrier. The catalyst can be a noble metal material such as platinum, palladium or rhodium. These catalyst materials can be directly added during the manufacture of the catalytic ceramic block 7, or can also be coated on the surface layer of the catalytic ceramic block 7. After the exhaust gas enters the interior of the housing 1 through the intake pipe 2, a catalytic reaction occurs through the catalytic ceramic block 7, facilitating the catalytic reaction of carbon monoxide and hydrocarbons in the exhaust gas; the exhaust gas treatment device further includes a central transition pipe 4 and a pressurizing mechanism;

[0037] The central transition pipe 4 is arranged inside the housing 1. The exhaust pipe 3 and the intake pipe 2 are connected through the central transition pipe 4. The central transition pipe 4 is a U-shaped pipe body, which is convenient for extending the exhaust gas reaction line. The catalytic ceramic block 7 is slidably arranged inside one side of the central transition pipe 4 close to the intake pipe 2. An electric heating element is also installed on the pipe wall of the central transition pipe 4. The electric heating element can be an electric heating plate, an electric heating pipe or an electric heating wire, which is embedded on the inner wall of the central transition pipe 4 and is equipped with a temperature control switch. When powered on and heated, the catalytic ceramic block 7 is heated up, facilitating the catalytic oxidation reaction. And a plurality of honeycomb holes 14 are evenly distributed on the catalytic ceramic block 7, which is convenient for the exhaust gas to penetrate into the interior of the catalytic ceramic block 7, then a catalytic oxidation reaction occurs, and finally flows out; A linkage opening and closing valve is arranged between the central transition pipe 4 and the intake pipe 2;

[0038] The pressurizing mechanism is arranged inside the central transition pipe 4, and the pressurizing mechanism includes a sealing bottom plate 11. The pressurizing mechanism fits against the bottom of the catalytic ceramic block 7 through the sealing bottom plate 11 and pushes the catalytic ceramic block 7 to slide along the central transition pipe 4 in the direction close to the intake pipe 2. The linkage opening and closing valve can seal the connection position between the central transition pipe 4 and the intake pipe 2. In this way, when the pressurizing mechanism pushes the catalytic ceramic block 7, the sealing bottom plate 11 seals the bottom port of the honeycomb holes 14 on the catalytic ceramic block 7, and at the same time makes the linkage opening and closing valve seal the connection position between the central transition pipe 4 and the intake pipe 2. Then the catalytic ceramic block 7 compresses the gas in the space of the central transition pipe 4 above it, realizing pressurization. Pressurization will cause the concentration of exhaust gas per unit volume to rise, thereby facilitating the increase of the contact frequency between the catalyst surface and the reactants, and thus accelerating the reaction rate.

[0039] In some specific embodiments, in order to facilitate the catalytic oxidation reaction between the catalytic ceramic block 7 and the tail gas in contact therewith even at low temperatures, when manufacturing the catalytic ceramic block 7, a certain proportion of water-absorbing material, such as calcium chloride, can be added. Calcium chloride can react with the water vapor in the passing tail gas and release heat, thereby increasing the temperature when the tail gas passes through, facilitating the catalytic oxidation reaction of gases such as carbon monoxide in the tail gas. And when the tail gas treatment device is idle, the catalytic ceramic block 7 can be taken out for high-temperature heating and dehydration for recycling. For easy removal, detachable covers can be provided at corresponding positions on the central transition pipe 4 and the housing 1.

[0040] In some specific embodiments, in combination with Figure 3 and Figure 4 As shown, the pressurizing mechanism further includes an electric telescopic rod 5 and a vibration mechanism. The electric telescopic rod 5 is fixedly installed on one side of the bottom of the central transition pipe 4, and the telescopic end of the electric telescopic rod 5 penetrates into the interior of the central transition pipe 4. The sealing bottom plate 11 is fixedly connected to the telescopic end of the electric telescopic rod 5. The sealing bottom plate 11 is horizontally located below the catalytic ceramic block 7. The electric telescopic rod 5 is controlled by a supporting controller to continuously expand and contract, so as to lift or lower the catalytic ceramic block 7 through the sealing bottom plate 11. The vibration mechanism is used to vibrate the gas pressurized between the catalytic ceramic block 7 and the central transition pipe 4, and rely on the vibration to break the laminar boundary layer of the gas, increase the gas turbulence intensity, and improve the gas-solid contact efficiency, thereby facilitating the catalytic oxidation reaction of the tail gas contacting the catalyst.

[0041] In some specific embodiments, in combination with Figure 5 and Figure 6 As shown, the vibration mechanism includes an impact member and an elastic rod 8. A plurality of elastic rods 8 are fixedly arranged on the inner top of the central transition pipe 4 near the intake pipe 2. A plurality of retaining balls 17 are evenly distributed on each elastic rod 8. A plurality of impact members are provided and distributed on the sealing bottom plate 11. The impact members, honeycomb holes 14, and elastic rods 8 are aligned and distributed.

[0042] Among them, the impact member includes a support rod 12 and an impact ball 13. The support rod 12 is vertically and fixedly arranged on the sealing bottom plate 11. The impact ball 13 is fixedly connected to the top of the support rod 12, and the impact ball 13 cooperates with the retaining balls 17 distributed on the corresponding elastic rod 8, and there is partial alignment between the two.

[0043] When the electric telescopic rod 5 pushes the plugging bottom plate 11 to rise, the plugging bottom plate 11 will drive the distributed support rods 12 to rise and penetrate into the honeycomb holes 14. After the plugging bottom plate 11 abuts against the bottom of the catalytic ceramic block 7, the impact ball 13 at the top of the elastic rod 8 just reaches the top port of the honeycomb hole 14. It should be noted that the diameters of both the impact ball 13 and the blocking ball 17 are smaller than the diameter of the honeycomb hole 14. Even if they come into contact with each other, they will not block the honeycomb hole 14. When the plugging bottom plate 11 pushes the catalytic ceramic block 7 upward, the elastic rod 8 will penetrate into the honeycomb hole 14 from above. For details, please refer to Figure 10 As shown in the figure, during this process, each support rod 12 sequentially squeezes through the blocking balls 17 distributed on the elastic rod 8 by relying on the corresponding impact ball 13. Each time it passes through a blocking ball 17, the elastic rod 8 will deform due to the squeezing effect and then rebound to its original position, so as to facilitate the elastic rod 8 to generate vibration, and the vibration acts on the gas entering the honeycomb hole 14.

[0044] In some specific implementation schemes, a cleaning soft brush 18 is further arranged at the bottom of each elastic rod 8. The cleaning soft brush 18 includes a plurality of needle-shaped rubber rods distributed circumferentially around the bottom of the elastic rod 8. The needle-shaped rubber rods are made of high-temperature resistant rubber materials, and the length of the needle-shaped rubber rods is greater than the diameter of the honeycomb hole 14. In this way, when the elastic rod 8 penetrates into the honeycomb hole 14, it can not only vibrate, but also rely on the cleaning soft brush 18 to clean the inner wall of the honeycomb hole 14, removing the substances that may be contained in the tail gas and adhering to the inner wall of the honeycomb hole 14, which affect the catalytic oxidation reaction effect. At the same time, the vibration effect can also improve the cleaning performance of the cleaning soft brush 18.

[0045] In some specific implementation schemes, in order to facilitate the plugging bottom plate 11 to completely disengage from the honeycomb holes 14 with the distributed support rods 12 when it descends, ensuring that the gas after the reaction treatment can flow smoothly through the catalytic ceramic block 7, a limiting block 16 is fixedly connected to the inner wall of the central transition pipe 4, and the limiting block 16 is cooperatively located below the catalytic ceramic block 7. When the plugging bottom plate 11 descends to the bottom of the central transition pipe 4, the catalytic ceramic block 7 slides down by gravity and stops on the limiting block 16 and cannot continue to fall.

[0046] In some specific implementation schemes, in combination with Figure 7 and Figure 8As shown, the linkage opening and closing valve includes a communication hole 9, a sealing baffle 20 and a traction mechanism. The communication hole 9 is provided at the connection position of the intake pipe 2 and the central transition pipe 4. An installation cavity 19 communicating with the communication hole 9 is also opened at the connection position of the central transition pipe 4 and the intake pipe 2. The installation cavity 19 covers the area where the communication hole 9 is located. The communication hole 9 is at the center of the installation cavity 19. There are two sealing baffles 20, which are symmetrically distributed in the installation cavity 19. The top of each sealing baffle 20 is rotationally connected to the inner wall of the installation cavity 19 through a rotating shaft. The position near the bottom of each sealing baffle 20 is cooperatively connected to the plugging bottom plate 11 through a traction mechanism. Both sealing baffles 20 are semi-circular. The sealing baffles 20 can be rotated and spliced together, and exactly block the communication hole 9.

[0047] Among them, the traction mechanism includes traction wires 15 and steering wheels 21. There are two traction wires 15. One end of the traction wire 15 is connected to the position near the bottom of the sealing baffle 20, and the other end penetrates the inner wall of the central transition pipe 4 near the top, and also penetrates the catalytic ceramic block 7, and is connected to the plugging bottom plate 11. The traction wire 15 can slide relative to the catalytic ceramic block 7. Additionally, it should be noted that in order to facilitate the connection between the traction wire 15 and the sealing baffle 20, a convex block 23 can be welded at the position near the bottom of the sealing baffle 20, and then the traction wire 15 is connected to the convex block 23. There are two steering wheels 21, which are respectively rotationally connected to both sides of the inner wall of the installation cavity 19, and each traction wire 15 bypasses the corresponding steering wheel 21.

[0048] When the plugging bottom plate 11 is at the inner bottom of the central transition pipe 4, the traction wire 15 is in a straightened state and suspends the corresponding sealing baffle 20. At this time, the communication hole 9 is in an open state. When the plugging bottom plate 11 rises, the sealing baffle 20 is released through the traction wire 15. The two symmetrically distributed sealing baffles 20 rotate towards the middle and are spliced together under the action of gravity, and block the communication hole 9. In this way, when the plugging bottom plate 11 pushes the catalytic ceramic block 7 to rise, the gas in the upper central transition pipe 4 can be effectively compressed, and the gas is prevented from returning to the intake pipe 2 through the communication hole 9.

[0049] It should be noted that before the plugging bottom plate 11 rises and contacts the bottom of the catalytic ceramic block 7, the sealing baffle 20 has completed the closing action. Then when the plugging bottom plate 11 releases the catalytic ceramic block 7 and pushes it to rise, the incoming tail gas can be prevented from being pressed back into the intake pipe 2.

[0050] In addition, in order to prevent the traction wire 15 from being wound around the elastic rod 18 when it is loose, an elastic wire reel can be installed on the traction wire 15. When the sealing baffle 20 is closed, the traction wire 15 is loose and can be wound up by the elastic wire reel.

[0051] In some specific implementation schemes, in order to assist the gas passing through the catalytic ceramic block 7 to turn and continue to flow, such asFigure 4 As shown, a rotating pressing plate 10 is arranged directly below the plugging bottom plate 11, and one side of the rotating pressing plate 10 is movably connected to the inner wall of the central transition pipe 4 through a resilient hinge.

[0052] When the plugging bottom plate 11 is not pressed on the rotating pressing plate 10, the rotating pressing plate 10 is in an inclined state. When the plugging bottom plate 11 descends to the inner bottom of the central transition pipe 4, the plugging bottom plate 11 squeezes the rotating pressing plate 10, and the rotating pressing plate 10 rotates from the inclined position to the horizontal position. During this process, the gas below is squeezed to assist the gas flow.

[0053] In some specific implementation schemes, auxiliary detachable end caps 6 are arranged on both sides of the bottom of the central transition pipe 4. The auxiliary detachable end caps 6 can be connected to the inner wall of the central transition pipe 4 through buckles or bolts. A main detachable end cap 22 is arranged on the side wall of the housing 1, and the main detachable end cap 22 can also be connected to the housing 1 through buckles or bolts. Since impurities will fall to the inner bottom of the central transition pipe 4 when the cleaning soft brush 18 cleans the honeycomb holes 14, it is necessary to clean regularly. The main detachable end cap 22 can be opened, then the auxiliary detachable end cap 6 is disassembled, and then cleaned.

[0054] To facilitate the understanding of this solution embodiment by those skilled in the art, the working principle of this solution will be briefly described in combination with a specific application scenario:

[0055] First, connect the intake pipe to the exhaust gas discharge end of the diesel engine. During the operation of the diesel engine, the exhaust gas is released into the central transition pipe 4 inside the housing through the intake pipe 2, and the heating temperature of the electric heating element arranged on the central transition pipe 4 is set. After the exhaust gas enters the central transition pipe 4 through the intake pipe 2, the exhaust gas first passes through the honeycomb holes 14 of the catalytic ceramic block 7. Since the catalytic ceramic block 7 is a carrier of the catalyst, a catalytic reaction occurs through the catalytic ceramic block 7, which is convenient for catalytically reacting carbon monoxide and hydrocarbons in the exhaust gas. And when manufacturing the catalytic ceramic block 7, a certain proportion of water-absorbing material, such as calcium chloride, can be added. Calcium chloride can react with the water vapor in the passing exhaust gas and release heat, thereby increasing the temperature when the exhaust gas passes through, facilitating the catalytic oxidation reaction between carbon monoxide and other gases in the exhaust gas and the catalytic ceramic block 7 in contact at low temperatures.

[0056] During the exhaust gas treatment process, the electrically driven telescopic rod that is provided is also controlled to continuously reciprocate and expand and contract. Whenever the electrically driven telescopic rod 5 extends, it drives the sealing bottom plate 11 to rise. The sealing bottom plate 11 then drives the distributed support rods 12 to rise and penetrate into the honeycomb holes 14. After the sealing bottom plate 11 abuts against the bottom of the catalytic ceramic block 7, the impact ball 13 at the top of the elastic rod 8 just reaches the top port of the honeycomb hole 14. At this time, the sealing bottom plate 11 seals the bottom port of the honeycomb hole 14 of the catalytic ceramic block 7, and the cross-sectional dimension of the catalytic ceramic block 7 matches the cross-sectional dimension of a part of the central transition pipe 4 at its location, forming a piston-like structure;

[0057] At this time, the sealing bottom plate 11 pushes the catalytic ceramic block 7 to rise. The sealing bottom plate 11 then releases the sealing baffle 20 through the traction wire 15. The two symmetrically distributed sealing baffles 20 then rotate towards the middle and are spliced together under the action of gravity, thereby blocking the communication hole 9. In this way, when the sealing bottom plate 11 pushes the catalytic ceramic block 7 to rise, the gas in the upper central transition pipe 4 can be effectively compressed, preventing the gas from returning to the intake pipe 2 through the communication hole 9. And at this time, the gas compressed by the catalytic ceramic block 7 is pressurized, and the pressurization will cause the concentration of the exhaust gas per unit volume to rise, thereby facilitating the increase of the contact frequency between the catalyst surface and the reactants, and accelerating the reaction rate.

[0058] And when the sealing bottom plate 11 pushes the catalytic ceramic block 7 to rise, the elastic rods 8 distributed on the inner top of one side of the central transition pipe 4 penetrate into the honeycomb holes 14 from above relative to the honeycomb holes 14. During this process, each support rod 12 sequentially squeezes through the blocking balls 17 distributed on the elastic rod 8 by relying on the corresponding impact ball 13. Every time it passes through a blocking ball 17, the elastic rod 8 will deform due to the squeezing action and then rebound and reset, thereby facilitating the elastic rod 8 to generate vibrations. And the vibrations act on the gas entering the honeycomb holes 14, relying on the vibration action to break the laminar boundary layer of the gas, increase the gas turbulence intensity, and improve the gas-solid contact efficiency, thereby facilitating the exhaust gas to contact the catalyst and undergo catalytic oxidation reaction.

[0059] And when the elastic rod 8 penetrates into the honeycomb holes 14 relative to the honeycomb holes 14, it can not only vibrate, but also rely on the cleaning soft brush 18 to clean the inner wall of the honeycomb holes 14, removing the substances that may be contained in the exhaust gas and adhering to the inner wall of the honeycomb holes 14, which affect the catalytic oxidation reaction effect. At the same time, the vibration action can also improve the cleaning performance of the cleaning soft brush 18.

[0060] When the electric telescopic rod 5 starts to contract, it drives the plugging bottom plate 11 to descend. The catalytic ceramic block 7 falls downward due to gravity and stops when it encounters the limit stop block 16. However, the plugging bottom plate 11 continues to descend, driving the support rod 12 to be withdrawn from the honeycomb holes 14, facilitating the exhausted gas after sufficient reaction to be discharged through the honeycomb holes 14, continuing to flow along the central transition pipe 4, and finally being discharged from the exhaust pipe 3. During the descent of the plugging bottom plate 11, it pulls the traction wire 15, and the traction wire 15 pulls the sealing baffle 20 to rotate and open by relying on the action of the steering wheel 21, realizing the reopening of the communication hole 19. At this time, the subsequent exhausted gas continues to enter the central transition pipe 4 for reaction treatment. And in order to avoid the backflow of the exhausted gas, the telescopic movement frequency of the electric telescopic rod 5 is ensured to be at a relatively high frequency.

[0061] The above has described several embodiments of the present invention in detail, but the embodiments of the present invention are not limited thereto and cannot be considered as used to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. An exhaust gas treatment device for a monorail explosion-proof diesel engine, comprising a housing (1) and a catalytic ceramic block (7), wherein one side of the housing (1) is provided with an air inlet pipe (2) and the other side is provided with an air outlet pipe (3), characterized in that: Also includes: A central transition pipe (4), wherein the outlet pipe (3) and the inlet pipe (2) are connected via the central transition pipe (4), the catalytic ceramic block (7) is slidably arranged inside a side of the central transition pipe (4) close to the inlet pipe (2), a plurality of honeycomb holes (14) are evenly distributed on the catalytic ceramic block (7), and a linkage opening and closing valve is arranged between the central transition pipe (4) and the inlet pipe (2); A pressurizing mechanism, wherein the pressurizing mechanism is arranged in the central transition pipe (4), and the pressurizing mechanism comprises a sealing bottom plate (11), wherein the pressurizing mechanism is attached to the bottom of the catalytic ceramic block (7) through the sealing bottom plate (11), and pushes the catalytic ceramic block (7) to slide along the central transition pipe (4) in a direction close to the intake pipe (2), and the linked opening and closing valve can close the connection position between the central transition pipe (4) and the intake pipe (2).

2. The exhaust gas treatment device for a monorail explosion-proof diesel engine according to claim 1 is characterized in that: The pressurizing mechanism further comprises an electric telescopic rod (5) and a vibration mechanism, wherein the electric telescopic rod (5) is fixedly mounted on one side of the bottom of the central transition pipe (4), the blocking bottom plate (11) is fixedly connected to the telescopic end of the electric telescopic rod (5), the blocking bottom plate (11) is horizontally located below the catalytic ceramic block (7), and the vibration mechanism is used to generate a vibration effect on the pressurized gas between the catalytic ceramic block (7) and the central transition pipe (4).

3. The exhaust gas treatment device for a monorail explosion-proof diesel engine according to claim 2 is characterized in that: The vibration mechanism comprises an impact member and an elastic rod (8); a plurality of elastic rods (8) are fixedly arranged on the inner top of one side of the central transition pipe (4) close to the air intake pipe (2); a plurality of blocking balls (17) are evenly distributed on each of the elastic rods (8); a plurality of impact members are arranged and distributed on the blocking bottom plate (11); and the impact members, honeycomb holes (14) and elastic rods (8) are aligned and distributed.

4. The exhaust gas treatment device for a monorail explosion-proof diesel engine according to claim 3 is characterized in that: The impact member comprises a support rod (12) and an impact ball (13); the support rod (12) is vertically fixedly arranged on the blocking bottom plate (11); the impact ball (13) is fixedly connected to the top of the support rod (12); and the impact ball (13) cooperates with a blocking ball (17) distributed on the corresponding elastic rod (8).

5. The exhaust gas treatment device for a monorail explosion-proof diesel engine according to claim 3 is characterized in that: A soft cleaning brush (18) is also provided at the bottom of each elastic rod (8).

6. The exhaust gas treatment device for a monorail explosion-proof diesel engine according to claim 1, characterized in that: A limit stopper (16) is fixedly connected to the inner wall of the central transition pipe (4), and the limit stopper (16) is located below the catalytic ceramic block (7).

7. The exhaust gas treatment device for a monorail explosion-proof diesel engine according to claim 1 is characterized in that: The linkage opening and closing valve comprises a connecting hole (9), a sealing plate (20) and a traction mechanism. The connecting hole (9) is arranged at the connection position between the intake pipe (2) and the central transition pipe (4). The connection position between the central transition pipe (4) and the intake pipe (2) is also provided with an installation cavity (19) connected with the connecting hole (9). Two sealing plates (20) are arranged and symmetrically distributed in the installation cavity (19). The top of each sealing plate (20) is rotatably connected to the inner wall of the installation cavity (19). Each sealing plate (20) is connected to the sealing bottom plate (11) through a traction mechanism near the bottom.

8. The exhaust gas treatment device for a monorail explosion-proof diesel engine according to claim 7 is characterized in that: The traction mechanism comprises a traction steel wire (15) and a steering wheel (21). Two traction steel wires (15) are provided, and one end of the traction steel wire (15) is connected to a position near the bottom of the sealing plate (20), and the other end passes through the inner wall of the central transition pipe (4) near the top and is connected to the sealing bottom plate (11). Two steering wheels (21) are provided and are distributed and rotatably connected to both sides of the inner wall of the installation cavity (19), and each traction steel wire (15) passes around the corresponding steering wheel (21).

9. The exhaust gas treatment device for a monorail explosion-proof diesel engine according to claim 1, characterized in that: A rotating pressure plate (10) is arranged directly below the blocking bottom plate (11), and one side of the rotating pressure plate (10) is movably connected to the inner wall of the central transition pipe (4) via a rebound hinge.

10. The exhaust gas treatment device for a monorail explosion-proof diesel engine according to claim 1, It is characterized in that A pair of detachable end covers (6) are provided on both sides of the bottom of the central transition pipe (4). A main detachable end cover (22) is provided on the side wall of the housing (1).

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