Wrecker with tail gas particle capturing structure

Abstract

The invention provides a wrecker with a tail gas particle capturing structure, which comprises a wrecker body, one end of an engine exhaust pipe is connected with the exhaust end of an engine, the other end of the exhaust pipe is connected with an oxidation catalyst, and the tail gas particle capturing structure is mounted between the oxidation catalyst and a silencer. The tail gas particle capturing structure comprises a first particle capturing carrier and a plurality of groups of second particle capturing carriers which are located at a working position and used for capturing tail gas particles, or the first particle capturing carrier and the plurality of groups of second particle capturing carriers which are located at a maintenance position are convenient to disassemble; the sealing plug structure is installed on one side of the first particle capturing carrier and one side of the multiple sets of second particle capturing carriers and comprises multiple sets of sliding plugging plates located at the center plugging position or the peripheral plugging position so that tail gas can be switched to pass through the first particle capturing carrier or the multiple sets of second particle capturing carriers. Partitioned trapping and alternate work of tail gas particles are achieved, and the situation that exhaust is affected by local excessive blocking of a single carrier is avoided.

Description

Technical Field

[0001] This invention belongs to the field of exhaust gas treatment technology, and more specifically, relates to a clearing vehicle with an exhaust gas particulate capture structure. Background Technology

[0002] With increasingly stringent regulations on vehicle emissions, diesel-powered tow trucks are generally required to be equipped with particulate matter capture devices to collect particulate matter and purify exhaust gases, meeting the requirements for on-road operation and environmental control. In long-term continuous operation scenarios, the particulate matter capture device is prone to carbon buildup and localized blockages, which not only affect exhaust flow and engine power output but also increase the frequency of device regeneration and maintenance difficulty.

[0003] Existing exhaust particulate capture structures for tow trucks use particulate capture carriers to capture vehicle exhaust particles through wall-flow filtration and airflow turbulence adsorption, which reduces exhaust particulate emissions to a certain extent. However, traditional exhaust particulate capture structures for tow trucks mostly use a single integral particulate capture carrier, which has uneven internal airflow distribution and is prone to local over-clogging while other areas are not fully utilized. After the carrier becomes clogged, it can only be regenerated or replaced as a whole, and cannot achieve zoned alternating operation and targeted cleaning. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a tow truck with an exhaust particulate capture structure. This solves the technical problem that in the prior art, traditional tow truck exhaust particulate capture structures often use a single, integrated particulate capture carrier, which is prone to localized excessive blockage and cannot achieve alternating zone operation and targeted cleaning.

[0005] The purpose and effect of the present invention, which provides a tow truck with an exhaust particulate capture structure, are achieved by the following specific technical means:

[0006] A tow truck with an exhaust particulate capture structure includes:

[0007] The main body of the recovery vehicle is equipped with an engine. One end of the exhaust pipe is connected to the exhaust end of the engine, and the other end of the exhaust pipe is connected to the oxidation catalyst.

[0008] The exhaust particulate matter capture structure is installed between the oxidation catalyst and the muffler. The structure includes a first particulate matter capture carrier located in a working or maintenance position, and multiple sets of second particulate matter capture carriers. When the first particulate matter capture carrier and the multiple sets of second particulate matter capture carriers are in the working position, the first particulate matter capture carrier is coaxial with the oxidation catalyst, and the multiple sets of second particulate matter capture carriers surround the first particulate matter capture carrier to capture exhaust particles. When the first particulate matter capture carrier and the multiple sets of second particulate matter capture carriers are in the maintenance position, the multiple sets of second particulate matter capture carriers are located at the bottom of the first particulate matter capture carrier for easy disassembly.

[0009] The sealing plug structure is installed on one side of the first particle capturing carrier and multiple sets of second particle capturing carriers. The sealing plug structure includes multiple sets of sliding sealing plates located at the central sealing position or the peripheral sealing position.

[0010] In a preferred embodiment, one end of the oxidation catalyst is connected to the exhaust gas particulate capture shell, an airflow guide plate is provided inside the exhaust gas particulate capture shell, a heat insulation pipe is provided on one side of the airflow guide plate, a first particulate capture carrier is inserted into the heat insulation pipe, a first airflow guide hole is opened on the other side of the airflow guide plate corresponding to the first particulate capture carrier, the first airflow guide hole is connected to the first particulate capture carrier, and a first dynamic sealing ring is provided between the first airflow guide hole and the first particulate capture carrier.

[0011] Multiple sets of second particle capture carriers surround the outside of the heat insulation tube. On one side of the airflow guide plate, multiple sets of second airflow guide holes are opened corresponding to the multiple sets of second particle capture carriers. The multiple sets of second airflow guide holes are connected to the multiple sets of second particle capture carriers respectively. Multiple sets of second dynamic sealing rings are respectively provided between the multiple sets of second airflow guide holes and the multiple sets of second particle capture carriers.

[0012] In a preferred embodiment, the exhaust particulate capture structure includes two sets of rigid chains located in the working or maintenance position, and two sets of guide rings are provided inside the exhaust particulate capture housing. The two sets of guide rings are located on both sides of the first particulate capture carrier and multiple sets of second particulate capture carriers, and the two ends of the multiple sets of second particulate capture carriers are respectively connected to the two sets of rigid chains.

[0013] Both sets of guide rail rings are provided with sliding rails, and two sets of rigid chains are slidably connected to the two sets of sliding rails respectively. The bottom of the exhaust gas particulate capture shell is provided with a first maintenance slot, and a sealing maintenance plate is rotatably installed in the first maintenance slot. The bottom of the guide rail ring is provided with a transition slot corresponding to the first maintenance slot, and the transition slot is connected to the bottom of the sliding rail.

[0014] When the rigid chain is in the working position, the sealing and maintenance plate is closed, and the rigid chain and multiple sets of second particulate capture carriers are located inside the exhaust particulate capture shell and surround the heat insulation pipe to capture exhaust particulates.

[0015] When the rigid chain is in the maintenance position, the sealing maintenance plate opens, and one end of the rigid chain passes through the first maintenance slot and the transfer slot and is installed at the bottom of the exhaust gas particulate capture shell. Multiple sets of second particulate capture carriers are located at the bottom of the exhaust gas particulate capture shell for easy disassembly.

[0016] In a preferred embodiment, two sets of sliding seats are provided on the inner side of the exhaust particulate capture shell corresponding to the airflow guide plate, and a rotating ring is provided on one side of the airflow guide plate. The circumference of the rotating ring is slidably connected to the two sets of sliding seats, and one end of a rigid chain away from the transfer slot is connected to the airflow guide plate.

[0017] The airflow guide plate is provided with a first outer gear ring and two sets of first sliding sealing rings on its periphery. The two sets of first sliding sealing rings are located on both sides of the first outer gear ring. The inner side of the exhaust gas particulate capture shell is in contact with the two sets of first sliding sealing rings. The outer side of the exhaust gas particulate capture shell is provided with a first through slot corresponding to the first outer gear ring. A first mounting seat is provided on one side of the first through slot. A maintenance motor for driving a rigid chain to move between the working position and the maintenance position is provided on the first mounting seat. The shaft end of the maintenance motor is connected to the first outer gear ring through a gear.

[0018] In a preferred embodiment, the sealing plug structure includes a rotating disk located at the central sealing position or the peripheral sealing position. A fixed disk is fixedly installed inside the exhaust gas particulate capture shell. A rotating disk is rotatably installed on one side of the fixed disk. Multiple sets of arc-shaped sliding grooves are opened on the rotating disk corresponding to multiple sets of second particulate capture carriers. Multiple sets of sliding through grooves are opened on the fixed disk corresponding to multiple sets of arc-shaped sliding grooves. The multiple sets of sliding through grooves are radially distributed. A sliding block is slidably installed in each of the multiple sets of sliding through grooves. A toggle rod is provided on the side of the sliding block near the rotating disk. The toggle rod passes through the arc-shaped sliding groove.

[0019] When the rotating disk is in the center blocking position, multiple sets of sliding blocks are located near the center of multiple sets of radially distributed sliding channels;

[0020] When the rotating disk is in the peripheral sealing position, multiple sets of sliding blocks are located in multiple sets of radially distributed sliding channels at positions away from the center.

[0021] In a preferred embodiment, a connecting rod is provided on one side of each of the multiple sets of sliding blocks, and the ends of the multiple sets of connecting rods away from the sliding blocks are respectively connected to multiple sets of sliding sealing plates. Multiple sets of sliding holes are opened on the periphery of the fixed disk corresponding to the multiple sets of sliding through grooves. The bottom ends of the multiple sets of sliding holes are respectively connected to the multiple sets of sliding through grooves. A connecting pipe is provided on the top of each of the multiple sets of sliding blocks, and the multiple sets of connecting pipes are respectively slidably inserted into the multiple sets of sliding holes.

[0022] Each set of sliding sealing plates has an air outlet slot on one side, and a third dynamic sealing ring is provided around the air outlet slot.

[0023] When multiple sets of sliding sealing plates are located in the central sealing position, the air outlet slots on one side of multiple sets of sliding sealing plates are connected to the first particle capture carrier, and one side of multiple sets of third dynamic sealing rings is in contact with the first particle capture carrier.

[0024] When multiple sets of sliding sealing plates are located in the peripheral sealing position, the air outlet slots on one side of the multiple sets of sliding sealing plates are connected to multiple sets of second particle capture carriers, and one side of multiple sets of third dynamic sealing rings is in contact with multiple sets of second particle capture carriers.

[0025] In a preferred embodiment, the connecting pipe, sliding block, and connecting rod are provided with air outlet channels that are connected in sequence. One end of the air outlet channel is provided with a one-way air valve that is connected to the air outlet slot. The top of the multiple sets of connecting pipes is provided with elbows, and a connecting block is provided on one side of the elbow. A first self-closing connector is provided on the top of the connecting block, and a second self-closing connector is provided on the bottom of the connecting block. The other end of the air outlet channel is connected to the first self-closing connector and the second self-closing connector. A connecting air ring is provided around the exhaust gas particulate capture shell, and a first connector is provided on the inner side of the connecting air ring corresponding to the multiple sets of first self-closing connectors.

[0026] In a preferred embodiment, a plurality of first mounting slots are provided around the fixed disk, and a second through slot is provided on the inner side of the exhaust gas particulate capture shell corresponding to the plurality of first mounting slots. One end of a plurality of connecting pipes passes through a plurality of second through slots and is connected to a plurality of first mounting slots, and the other end of a plurality of connecting pipes is connected to a connecting air ring. A plurality of second mounting slots are provided around the fixed disk corresponding to a plurality of second self-closing joints, and a second connector is provided in a plurality of second mounting slots. A plurality of ventilation ducts are provided around the fixed disk, one end of a plurality of ventilation ducts is connected to a plurality of second connectors, and the other end of a plurality of ventilation ducts is connected to a connecting air ring through a plurality of connecting pipes.

[0027] When the sliding block is in the center sealing position, the second self-closing joint at the bottom of the connecting block is connected to the second connecting head, and the airflow in the connecting ring is sprayed out from the air outlet through the connecting pipe, the connecting ventilation duct, and the air outlet channel in sequence, blowing out the carbon deposits and particles in the pores of the first particle capture carrier.

[0028] When the sliding block is in the peripheral sealing position, the first self-closing joint at the top of the connecting block connects to the first connecting head, and the airflow in the connecting ring is sprayed out from the air outlet through the air outlet channel, blowing out the carbon deposits and particles in the multiple sets of second particle capture carrier pores.

[0029] In a preferred embodiment, a vent pipe is provided on one side of the connecting air ring. One end of the vent pipe is connected to a high-pressure air pump. The vent pipe is provided with an atomizing nozzle for connection to an external cleaning agent filling device and a pipe connector for connection to an external cleaning liquid filling device. Two sets of second maintenance slots are provided at the bottom of the exhaust gas particulate capture shell. The two sets of second maintenance slots are located at both ends of the first particulate capture carrier and multiple sets of second particulate capture carriers, respectively. A sealing drain plate is rotatably installed in each of the two sets of second maintenance slots.

[0030] In a preferred embodiment, a second external gear ring is provided on the periphery of the rotating disk, a connecting slot is provided on the outer side of the exhaust gas particulate capture shell, a second mounting seat is provided on one side of the connecting slot, and a blocking motor for driving the rotating disk to rotate between the central blocking position and the peripheral blocking position is provided on the second mounting seat, and the shaft end of the blocking motor is connected to the second external gear ring through a gear.

[0031] Two sets of second sliding sealing rings are also provided around the rotating disk, with the two sets of second sliding sealing rings located on both sides of the second external gear ring.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. By setting up a centrally located first particle capture carrier and multiple sets of surrounding second particle capture carriers, along with a sealing plug structure that can switch between central and peripheral sealing positions, it is possible to achieve zoned capture and alternating operation of exhaust particles. When the sealing plug structure is in the central sealing position, exhaust gas can enter multiple sets of second particle capture carriers for filtration through multiple sets of second airflow guide holes. When the sealing plug structure is in the peripheral sealing position, exhaust gas can enter the first particle capture carrier for filtration through the first airflow guide hole. This avoids the situation where a single carrier is excessively blocked in one area while other areas are not fully utilized, ensuring the continuity of exhaust gas filtration. It solves the problem that traditional exhaust particle capture structures with a single integral carrier are prone to localized excessive blockage and cannot operate in zones and alternately, reducing exhaust back pressure and ensuring stable engine power output.

[0034] 2. By cooperating with the sliding sealing plate, connecting pipe, air outlet channel in the sliding block, and connecting air ring and high-pressure air pump, the first particle capture carrier or multiple sets of second particle capture carriers can be backflushed according to the different sealing positions. When the sealing plug structure is in the central sealing position, multiple sets of sliding sealing plates are located at the end of the first particle capture carrier away from the engine to seal it. The high-pressure air pump introduces high-pressure gas into the connecting air ring. When the rotating disk of the sealing plug structure is in the central sealing position, multiple sets of sliding blocks are located at the center of multiple sets of radially distributed sliding channels. The air outlet channels on one side of multiple sets of sliding sealing plates are connected to the first particle capture carrier. One side of multiple sets of third dynamic sealing rings is in contact with the first particle capture carrier. The second self-closing joint at the bottom of the connecting block is connected to the second connecting head. The airflow in the connecting air ring is sprayed out from the air outlet channel through the connecting pipe, connecting ventilation duct, and air outlet channel in sequence, backflushing the carbon deposits and particles in the pores of the first particle capture carrier. When the second When the particulate capture carrier is sealed and vented, the sealing motor is started to drive the rotating disk to the peripheral sealing position. Multiple sets of sliding blocks are located at positions away from the center of multiple sets of radially distributed sliding channels. The air outlet channels on one side of multiple sets of sliding sealing plates are connected to multiple sets of second particulate capture carriers. One side of multiple sets of third dynamic sealing rings is in contact with multiple sets of second particulate capture carriers. The first self-closing joint at the top of the connecting block is connected to the first connecting head. The airflow in the connecting ring is sprayed out from the air outlet channel through the air outlet channel, blowing out the carbon deposits and particles in the channels of multiple sets of second particulate capture carriers. When parking maintenance is performed, the atomizing nozzle and pipe joint on the vent pipe can be connected to cleaning agent and cleaning fluid to remove carbon deposits and particles in the carrier channels. At the same time, the sealing drain plate at the bottom of the exhaust particulate capture shell can discharge cleaning waste liquid in time, avoiding secondary deposition of dirt inside the device, avoiding the decrease in filtration efficiency caused by carbon deposit accumulation, extending the service life of the carrier, and reducing the frequency of overall carrier replacement and regeneration.

[0035] 3. Multiple sets of second particulate capture carriers can move between the working position and the maintenance position through the cooperation of rigid chains and guide rail rings. When the first and second particulate capture carriers need to be disassembled and maintained, the sealed maintenance plate is opened, and the rigid chain is moved by the maintenance motor to move the second particulate capture carrier to the bottom of the exhaust gas particulate capture shell. This expands the disassembly and assembly operation space, facilitates rapid inspection and disassembly in outdoor emergency scenarios, and improves convenience. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the assembled structure of the present invention;

[0037] Figure 2 This is a schematic diagram of the assembled structure of the oxidation catalyst, muffler, and exhaust particulate capture shell in this invention;

[0038] Figure 3This is a schematic diagram of the structure after the exhaust gas particulate capture structure and the sealing plug structure are assembled in this invention;

[0039] Figure 4 This is a schematic diagram of the exhaust particulate capture structure and the sealing plug structure after separation in this invention;

[0040] Figure 5 This is a schematic diagram of the assembled sealing plug structure in this invention;

[0041] Figure 6 This is a schematic diagram of the disassembled sealing plug structure in this invention;

[0042] Figure 7 This is a schematic diagram of the sealing plug structure located at the peripheral sealing position in this invention;

[0043] Figure 8 This is a schematic diagram of the sealing plug structure located at the central sealing position in this invention;

[0044] Figure 9 This is a cross-sectional view of the sealing plug structure in this invention;

[0045] Figure 10 This is a schematic diagram of the structure of the sliding seat and the airflow guide plate assembled in this invention;

[0046] Figure 11 This is a schematic diagram of the structure after the sliding seat and the airflow guide plate are separated in this invention;

[0047] Figure 12 This is a schematic diagram of the structure of the rigid chain and guide ring assembled in this invention;

[0048] Figure 13 This is a schematic diagram of the structure after the rigid chain and guide ring are separated in this invention;

[0049] Figure 14 This is a schematic diagram of the structure of the first particle capturing carrier, the second particle capturing carrier, and the rigid chain located in the working position in this invention;

[0050] Figure 15 This is a schematic diagram of the structure of the first particle capturing carrier, the second particle capturing carrier, and the rigid chain located in the maintenance position in this invention.

[0051] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0052] 101. Wrecker vehicle body; 102. Oxidation catalyst; 103. Muffler; 104. Exhaust particulate capture housing; 201. First particulate capture carrier; 202. Second particulate capture carrier; 204. Airflow guide plate; 205. Heat insulation pipe; 206. First airflow guide hole; 207. First dynamic sealing ring; 208. Second airflow guide hole; 209. Second dynamic sealing ring; 210. Rigid chain; 211. Guide rail ring; 212. Sliding rail; 213. First maintenance slot; 214. Sealing maintenance plate; 215. Transfer slot; 216. Sliding seat; 217. Rotating ring; 218. First external gear ring; 219. First sliding sealing ring; 222. Maintenance motor; 301. Sliding sealing plate; 302. Rotating disk; 303. Fixed disk; 304. Arc-shaped sliding groove; 305. Sliding through groove; 306. 307. Sliding block; 308. Actuating rod; 309. Connecting rod; 310. Sliding hole; 311. Connecting pipe; 312. Air outlet slot; 313. Third dynamic sealing ring; 314. Air outlet passage; 315. One-way valve; 316. Elbow; 317. Connecting block; 318. First self-closing joint; 319. Second self-closing joint; 320. Connecting ring; 321. First connecting head; 322. First mounting slot; 323. 323. Second through slot; 324. Connecting pipe; 325. Second mounting slot; 326. Second connector; 327. Connecting ventilation duct; 328. Ventilation pipe; 329. Atomizing nozzle; 330. Pipe joint; 331. Second maintenance slot; 332. Sealing drain plate; 333. Second external gear ring; 334. Connecting slot; 335. Seal motor; 336. Second sliding sealing ring. Detailed Implementation

[0053] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solutions of the present invention, but should not be used to limit the scope of protection of the present invention.

[0054] Example:

[0055] As attached Figures 1 to 15 As shown:

[0056] This invention provides a tow truck with an exhaust particulate capture structure, including a tow truck body 101. An engine is mounted on the tow truck body 101, providing power for the tow truck body 101's driving and operational actions. One end of an exhaust pipe is connected to the engine's exhaust end, and the other end is connected to an oxidation catalyst 102. The exhaust pipe is used to transport the exhaust gas generated during engine operation. The oxidation catalyst 102 can oxidize carbon monoxide and hydrocarbons in the exhaust gas, reducing the content of harmful substances in the exhaust gas. Simultaneously, it can oxidize nitrogen monoxide in the exhaust gas to nitrogen dioxide, providing reaction conditions for passive regeneration in the subsequent particulate capture process. The exhaust particulate capture structure is installed between the oxidation catalyst 102 and the muffler. Between the two devices 103, the muffler 103 is used to reduce noise during the exhaust emission process, and the exhaust particulate capture structure is used to capture carbon soot and solid particulate matter in the exhaust gas to achieve exhaust gas purification and meet emission control requirements. The exhaust particulate capture structure includes a first particulate capture carrier 201 located in the working position or maintenance position and multiple sets of second particulate capture carriers 202. Both the first particulate capture carrier 201 and the multiple sets of second particulate capture carriers 202 adopt a wall-flow honeycomb ceramic structure, which can capture particulate matter in the exhaust gas through physical interception. When the first particulate capture carrier 201 and the multiple sets of second particulate capture carriers 202 are in the working position, the first particulate capture carrier 201 is coaxial with the oxidation catalyst 102, and the multiple sets of second particulate capture carriers 202 are coaxial with the oxidation catalyst 102. The particle capture carrier 202 surrounds the first particle capture carrier 201 to capture exhaust particles, achieving zoned filtration of the exhaust gas and avoiding the problem of excessive local clogging of a single carrier. When the first particle capture carrier 201 and multiple sets of second particle capture carriers 202 are in the maintenance position, the multiple sets of second particle capture carriers 202 are located at the bottom of the first particle capture carrier 201 for easy disassembly, which can expand the operating space for carrier disassembly and assembly, simplify the maintenance process, and complete the replacement and maintenance of a single carrier without disassembling the entire device, adapting to the emergency maintenance needs of tow trucks in outdoor operation scenarios; a sealing plug structure is installed on one side of the first particle capture carrier 201 and multiple sets of second particle capture carriers 202. The system includes multiple sets of sliding blocking plates 301 located at the central or peripheral blocking positions. The sliding blocking plates 301 can switch positions to block the ends of the corresponding carriers, changing the flow path of the exhaust gas. When the sliding blocking plate 301 is located at the central blocking position, it can block the end of the first particle capture carrier 201, forcing the exhaust gas into multiple sets of second particle capture carriers 202 to complete filtration. When the sliding blocking plate 301 is located at the peripheral blocking position, it can block the ends of multiple sets of second particle capture carriers 202, forcing the exhaust gas into the first particle capture carrier 201 to complete filtration. This allows for the alternating operation and zoned use of multiple sets of first and second particle capture carriers 201 and 202, ensuring stable filtration performance of the carriers.

[0057] One end of the oxidation catalyst 102 is connected to the exhaust gas particulate capture housing 104. The exhaust gas particulate capture housing 104 provides a closed installation space and protective support for the internal functional components, preventing external mud, water, and debris from entering the device and preventing gas leakage during exhaust gas treatment. An airflow guide plate 204 is provided inside the exhaust gas particulate capture housing 104. The airflow guide plate 204 receives the exhaust gas discharged from the oxidation catalyst 102, ensuring that the exhaust gas can be distributed to the corresponding particulate capture carrier. A heat insulation pipe 205 is provided on one side of the airflow guide plate 204. The first particulate capture carrier 201 passes through the heat insulation pipe 205. The heat insulation pipe 205 can isolate the heat transfer between the first particulate capture carrier 201 and multiple sets of second particulate capture carriers 202, preventing the heat generated by the first particulate capture carrier 201 and multiple sets of second particulate capture carriers 202 from interfering with each other during operation, ensuring the stable operating temperature of each set of carriers, and avoiding local temperature anomalies that affect particulate capture. Regarding the regeneration effect; on the other side of the airflow guide plate 204, a first airflow guide hole 206 is provided corresponding to the first particulate capture carrier 201. The first airflow guide hole 206 is connected to the first particulate capture carrier 201. When in use, when the sealing plug structure is in the peripheral sealing position, the exhaust gas treated by the oxidation catalyst 102 can be introduced into the interior of the first particulate capture carrier 201 through the first airflow guide hole 206, and the first particulate capture carrier 201 completes the capture and filtration of particulate matter in the exhaust gas; a first dynamic sealing ring 207 is provided between the first airflow guide hole 206 and the first particulate capture carrier 201. The first dynamic sealing ring 207 is used to fill the gap between the first airflow guide hole 206 and the first particulate capture carrier 201. It can always maintain the sealing state of the contact surface when the device vibrates during operation or when the first particulate capture carrier 201 undergoes slight positional changes, preventing the exhaust gas from leaking directly from the gap without being filtered by the first particulate capture carrier 201, thus ensuring the exhaust gas filtration effect;Multiple sets of second particulate matter capture carriers 202 surround the outside of the heat insulation pipe 205. On one side of the airflow guide plate 204, multiple sets of second airflow guide holes 208 are also provided corresponding to the multiple sets of second particulate matter capture carriers 202. These multiple sets of second airflow guide holes 208 are connected to the multiple sets of second particulate matter capture carriers 202. During use, when the sealing plug structure is in the central sealing position, the exhaust gas treated by the oxidation catalyst 102 can be introduced into the corresponding multiple sets of second particulate matter capture carriers 202 through the multiple sets of second airflow guide holes 208, allowing the multiple sets of second particulate matter capture carriers 202 to simultaneously capture particulate matter in the exhaust gas. The capture and filtration process involves multiple sets of second airflow guide holes 208 distributed circumferentially along the heat insulation pipe 205. Multiple sets of second dynamic sealing rings 209 are respectively provided between the multiple sets of second airflow guide holes 208 and the multiple sets of second particulate capture carriers 202. These second dynamic sealing rings 209 fill the gaps between the multiple sets of second airflow guide holes 208 and the multiple sets of second particulate capture carriers 202, maintaining a sealed state at the corresponding contact surfaces during device operation. This prevents exhaust gas from leaking directly from the gaps without being filtered by the second particulate capture carriers 202, ensuring the filtration effect of the multiple sets of second particulate capture carriers 202.

[0058] In this embodiment, the heat transfer between the first particle capture carrier 201 and multiple sets of second particle capture carriers 202 is blocked by the heat insulation pipe 205 to prevent temperature interference between the two sets of carriers, ensuring the stable operation of particle capture and regeneration processes of each carrier. The vehicle exhaust gas can be introduced into the first particle capture carrier 201 through the first airflow guide hole 206, or into multiple sets of second particle capture carriers 202 through multiple sets of second airflow guide holes 208, realizing the partitioned filtration of exhaust gas and the alternating use of carriers. The first dynamic sealing ring 207 is used to fill the gap between the first airflow guide hole 206 and the first particle capture carrier 201, and multiple sets of second dynamic sealing rings 209 are used to fill the gap between multiple sets of second airflow guide holes 208 and multiple sets of second particle capture carriers 202, preventing exhaust gas from leaking directly without filtration and ensuring the stable exhaust gas purification effect of the device.

[0059] Please see as follows Figure 4 , Figure 12 , Figure 13 , Figure 14 and Figure 15As shown, the exhaust particulate capture structure includes two sets of rigid chains 210 located in the working or maintenance position. The rigid chains 210 carry multiple sets of second particulate capture carriers 202 and drive them to move synchronously between the working and maintenance positions, ensuring the synchronicity and stability of the multiple sets of second particulate capture carriers 202 during position switching. Two sets of guide rail rings 211 are provided inside the exhaust particulate capture housing 104. These two sets of guide rail rings 211 are located on both sides of the first particulate capture carrier 201 and the multiple sets of second particulate capture carriers 202, respectively. The two ends of the multiple sets of second particulate capture carriers 202 are connected to the two sets of rigid chains 210, allowing the multiple sets of second particulate capture carriers 202 to complete synchronous position switching as the rigid chains 210 move. Each set of guide rail rings 211 has a sliding rail 212, and the two sets of rigid chains 210 are slidably connected to the two sets of sliding rails 212. The sliding rails 212 limit the sliding path of the rigid chains 210, ensuring the synchronicity and stability of the rigid chains. During the sliding process, the 210 will not deviate from its trajectory, allowing multiple sets of second particle capture carriers 202 to surround the heat insulation tube 205 when in the working position. The bottom of the exhaust gas particle capture shell 104 is provided with a first maintenance slot 213, which provides a channel for the rigid chain 210 and multiple sets of second particle capture carriers 202 to move out, and at the same time provides operating space for maintenance operations. A sealing maintenance plate 214 is rotatably installed inside the first maintenance slot 213, which can realize the opening and closing of the first maintenance slot 213. The bottom of the guide rail ring 211 is provided with a transition slot 215 corresponding to the first maintenance slot 213. The transition slot 215 is connected to the bottom of the sliding rail 212 and is used to connect the sliding rail 212 and the first maintenance slot 213, providing a transition channel for the rigid chain 210 to move from inside the sliding rail 212 to the outside of the exhaust gas particle capture shell 104, and avoiding jamming during the movement of the rigid chain 210.

[0060] In this embodiment, when the rigid chain 210 is in the working position, the sealing maintenance plate 214 is closed, sealing the first maintenance slot 213 to prevent exhaust gas from leaking from the slot. Simultaneously, it blocks external mud, water, and debris from entering the exhaust gas particulate capture housing 104, preventing contamination and jamming of internal components. The rigid chain 210 is completely housed within the sliding track 212, located inside the exhaust gas particulate capture housing 104 along with multiple sets of second particulate capture carriers 202, and surrounding the heat insulation pipe 205. The multiple sets of second particulate capture carriers 202 are aligned with their corresponding second airflow guide holes 208, ensuring stable capture of exhaust gas particles. When it is necessary to disassemble and maintain the first particulate capture carrier 201 and the second particulate capture carrier 202, the sealing maintenance plate 214 is opened, driving the rigid chain 210 to move along the sliding track 212, moving the rigid chain 210 to the maintenance position. One end of the 210 passes through the first maintenance slot 213 and the transition slot 215 and is installed at the bottom of the exhaust particulate capture housing 104. Multiple sets of second particulate capture carriers 202 move synchronously to the bottom of the exhaust particulate capture housing 104 along with the rigid chain 210, freeing them from the narrow installation space inside the exhaust particulate capture housing 104. This expands the disassembly and assembly space, eliminating the need to completely disassemble the exhaust particulate capture housing 104, surrounding exhaust pipes, and related components. The second particulate capture carriers 202 can be directly disassembled, cleaned, and replaced, facilitating rapid inspection and disassembly in outdoor emergency scenarios. At the same time, after the multiple sets of second particulate capture carriers 202 are removed, the first particulate capture carrier 201 inside the exhaust particulate capture housing 104 is fully exposed, allowing for simultaneous inspection and maintenance of the first particulate capture carrier 201. This reduces the number of operation steps in maintenance work and improves the convenience of maintenance work.

[0061] Two sets of sliding seats 216 are provided on the inner side of the exhaust particulate capture housing 104, corresponding to the airflow guide plate 204. The two sets of sliding seats 216 are symmetrically distributed on the inner side of the exhaust particulate capture housing 104. A rotating ring 217 is provided on one side of the airflow guide plate 204. The circumference of the rotating ring 217 is slidably connected to the two sets of sliding seats 216. The sliding seats 216 can axially constrain the rotating ring 217, so that the rotating ring 217 can only complete the rotational motion along its own axis, avoiding radial offset or axial movement during rotation, and ensuring airflow. To ensure the positional stability of the guide plate 204 during rotation, one end of a set of rigid chains 210, away from the transition slot 215, is connected to the airflow guide plate 204, allowing the rotational motion of the airflow guide plate 204 to be synchronously transmitted to the rigid chains 210, thus driving the rigid chains 210 to complete positional movement. The airflow guide plate 204 is provided with a first external gear ring 218 and two sets of first sliding sealing rings 219 on its periphery. The first external gear ring 218 is used to transmit rotational power, and the two sets of first sliding sealing rings 219 are respectively located on the first external gear ring 218. On both sides of ring 218, the inner side of exhaust gas particulate capture housing 104 contacts two sets of first sliding sealing rings 219. The two sets of first sliding sealing rings 219 can maintain the sealing state of the contact surface between the periphery of airflow guide plate 204 and the inner side of exhaust gas particulate capture housing 104 during the rotation of airflow guide plate 204, preventing exhaust gas from leaking from the mating gap, and blocking dust and impurities inside the device from entering the transmission meshing part, avoiding wear and jamming of components. The outer side of exhaust gas particulate capture housing 104 is provided with a first through slot corresponding to the first outer gear ring 218. The first through slot provides clearance space for the power transmission between the inner and outer sides. A first mounting seat is provided on one side of the first through slot. A maintenance motor 222 is provided on the first mounting seat for driving the rigid chain 210 to move between the working position and the maintenance position. The shaft end of maintenance motor 222 is connected to the first outer gear ring 218 through gear. Maintenance motor 222 can output rotational power, and through the meshing transmission of gear and first outer gear ring 218, it drives airflow guide plate 204 to complete rotational movement.

[0062] In this embodiment, the switching between the working position and the maintenance position of the exhaust particulate capture structure is only performed when the tow truck is parked and the engine is off, and there is no exhaust emission. The limiting constraint of the rotating ring 217 by two sets of sliding seats 216 ensures that the airflow guide plate 204 can rotate smoothly around its own axis within the exhaust particulate capture housing 104 without any positional deviation. This ensures that the first airflow guide hole 206 and the second airflow guide hole 208 on the airflow guide plate 204 can maintain corresponding alignment with the corresponding particulate capture carrier under normal working conditions. When maintenance is required, first confirm that the tow truck is in the parked maintenance state, then start the maintenance motor 222. The maintenance motor 222 connects to the first external gear ring via a shaft-end gear. The meshing transmission of 218 drives the airflow guide plate 204 to rotate. The rotating airflow guide plate 204 drives the rigid chain 210 connected to it to move along the sliding track 212, so that the rigid chain 210 switches between the working position and the maintenance position. When the rigid chain 210 moves to the working position, the maintenance motor 222 locks, fixing the rotation position of the airflow guide plate 204. This ensures that the rigid chain 210 and the multiple sets of second particle capture carriers 202 are stable during normal operation of the device and will not be displaced. At the same time, the two sets of first sliding sealing rings 219 can continuously maintain the sealing performance of the contact surface throughout the entire process of the rotation and locking of the airflow guide plate 204, avoiding the problems of exhaust gas leakage and impurity intrusion.

[0063] Please see as follows Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the sealing plug structure includes a rotating disk 302 located at the central or peripheral sealing position. The rotating disk 302 is used to adjust the exhaust gas flow path. A fixed disk 303 is fixedly installed inside the exhaust gas particulate capture shell 104. The rotating disk 302 is rotatably installed on one side of the fixed disk 303. The rotating disk 302 can rotate relative to the fixed disk 303 around its own axis, providing power input for switching the sealing position. Multiple sets of arc-shaped sliding grooves 304 are opened on the rotating disk 302 corresponding to multiple sets of second particulate capture carriers 202. The multiple sets of arc-shaped sliding grooves 304 are evenly distributed along the circumference of the rotating disk 302. The arc-shaped sliding grooves 304 are used to convert the rotational motion of the rotating disk 302 into linear sliding power through their own arc trajectory. The fixed disk 303... The upper part has multiple sets of sliding grooves 305 corresponding to multiple sets of arc-shaped sliding grooves 304. The multiple sets of sliding grooves 305 are radially distributed. The sliding grooves 305 are used to constrain the sliding path of the internal components, ensuring that the components can only complete linear movement along the radial set path. Sliding blocks 306 are slidably arranged in each set of sliding grooves 305. A toggle rod 307 is arranged on the side of the sliding block 306 near the rotating disk 302. The toggle rod 307 passes through the arc-shaped sliding groove 304. The toggle rod 307 is used to realize the power transmission between the rotating disk 302 and the sliding block 306. When the rotating disk 302 rotates, the inner wall of the arc-shaped sliding groove 304 can apply a continuous force to the toggle rod 307, causing the sliding block 306 to complete synchronous sliding along the sliding groove 305.

[0064] In this embodiment, when the rotating disk 302 is in the central blocking position, the rotating disk 302 rotates. Through the cooperation of the arc-shaped sliding groove 304 and the actuating rod 307, it drives multiple sets of sliding blocks 306 to be positioned near the center of multiple sets of radially distributed sliding channels 305. This causes the sliding blocks 306 to move the matching blocking components to the central area, completing the blocking of the end of the first particle capture carrier 201. This forces the exhaust gas into the multiple sets of second particle capture carriers 202 on the periphery for filtration. At the same time, it can also filter the first particle capture carrier 201 in the blocked state. The carbon deposit cleaning operation does not affect the overall exhaust gas filtration operation of the device. When the rotating disk 302 is in the peripheral sealing position, the rotating disk 302 rotates in the opposite direction. Through the cooperation of the arc-shaped sliding groove 304 and the actuating rod 307, it drives multiple sets of sliding blocks 306 to be located in the radially distributed multiple sets of sliding channels 305 away from the center. This causes the sliding blocks 306 to move the matching sealing components to the peripheral area, thereby completing the sealing of the ends of multiple sets of second particle capture carriers 202 and forcing the exhaust gas to enter the first particle capture carrier 201 in the center for filtration.

[0065] Each of the multiple sets of sliding blocks 306 has a connecting rod 308 on one side. The end of the connecting rod 308 away from the sliding block 306 is connected to a multiple set of sliding sealing plates 301, so that the sliding sealing plates 301 can move synchronously with the sliding blocks 306, achieving a smooth switching of the sealing position. The fixed disk 303 has multiple sets of sliding holes 309 on its periphery corresponding to the multiple sets of sliding grooves 305. The bottom ends of the multiple sets of sliding holes 309 are connected to the multiple sets of sliding grooves 305, providing guidance for the sliding of the components and preventing offset or jamming during movement. Each of the multiple sets of sliding blocks 306 has a connecting rod 308 on its top. A connecting pipe 310 is provided, and multiple sets of connecting pipes 310 are slidably inserted into multiple sets of sliding holes 309. The connecting pipes 310 can slide synchronously with the sliding block 306 along the sliding holes 309. Each of the multiple sets of sliding sealing plates 301 has an air outlet groove 311 on one side. The air outlet groove 311 is used to guide the back-blowing cleaning airflow to the end face of the corresponding particle capture carrier, ensuring that the airflow can cover all the filter channels of the carrier. A third dynamic sealing ring 312 is provided around the air outlet groove 311. The third dynamic sealing ring 312 can fill the fit gap between the sliding sealing plate 301 and the corresponding particle capture carrier, ensuring the sealing performance of the contact surface.

[0066] In this embodiment, when multiple sets of sliding sealing plates 301 are located in the central sealing position, the sliding block 306 moves along the sliding groove 305 to a position close to the center. The connecting rod 308 drives the multiple sets of sliding sealing plates 301 to move synchronously to the central area. The air outlet grooves 311 on one side of each set of sliding sealing plates 301 are connected to the first particle capture carrier 201. One side of each set of third dynamic sealing rings 312 is in contact with the first particle capture carrier 201. The third dynamic sealing rings 312 can maintain a sealed contact surface throughout the device's operation, preventing exhaust gas from leaking directly from the gaps without being filtered by the first particle capture carrier 201. Simultaneously, they can force the exhaust gas into multiple sets of second particle capture carriers 202 for filtration. The air outlet grooves 311 can deliver backflushing airflow to the end face of the first particle capture carrier 201 to backflush and clean the carbon deposits and particles in the carrier's pores, ensuring stable filtration performance of the carrier. When multiple sets of sliding sealing plates 301 are in the central sealing position, the sliding block 306 moves along the sliding groove 305 to a position close to the center. The connecting rod 308 drives the multiple sets of sliding sealing plates 301 to the central sealing position. When plate 301 is in the peripheral sealing position, sliding block 306 moves along sliding groove 305 to a position away from the center. Through connecting rod 308, multiple sets of sliding sealing plates 301 move synchronously to the peripheral area. The air outlet groove 311 on one side of multiple sets of sliding sealing plates 301 are connected to multiple sets of second particle capture carriers 202 respectively. One side of multiple sets of third dynamic sealing rings 312 is in contact with multiple sets of second particle capture carriers 202 respectively. The third dynamic sealing rings 312 can maintain the sealing state of the corresponding contact surface to prevent the exhaust gas from leaking directly from the gap without being filtered by the second particle capture carrier 202. At the same time, it can force the exhaust gas into the first particle capture carrier 201 to complete the filtration treatment. The air outlet groove 311 can deliver the backflushing airflow to the end face of the corresponding second particle capture carrier 202 to backflush and clean the carbon deposits and particles in the channels of each carrier, realize the alternating operation and online cleaning of the carriers, and ensure the continuity of the exhaust gas filtration operation of the device.

[0067] The connecting pipe 310, sliding block 306, and connecting rod 308 are provided with sequentially connected air outlet channels 313, forming a complete airflow path. These channels provide an airflow path for backflushing cleaning operations, ensuring continuous airflow as the sliding sealing plate 301 moves. One end of the air outlet channel 313 is equipped with a one-way valve 314 connected to the air outlet slot 311. The one-way valve 314 only allows airflow from the air outlet channel 313 to the air outlet slot 311, preventing particles and dust in the exhaust gas from reversing into the air outlet channel 313, thus avoiding blockage and ensuring long-term unobstructed backflushing airflow. Multiple sets of connecting pipes 310 are equipped with elbows 315 at their top ends. The elbows 315 are used to adjust the direction of the airflow, adapting to the positional changes of the connecting pipes 310 as the sliding block 306 slides. A connecting block 316 is provided on one side of the elbow 315. A first self-closing connector 317 is provided at the top of the connecting block 316, and a second self-closing connector 318 is provided at the bottom of the connecting block 316. The other end of the air outlet channel 313 is connected to the first self-closing connector 317 and the second self-closing connector 318. The first self-closing connector 317 and the second self-closing connector 318 can open the air passage when they are connected and automatically close the port when they are disconnected to prevent gas leakage and external impurities from entering the air passage. A connecting air ring 319 is provided around the exhaust gas particle capture shell 104. The connecting air ring 319 is used to collect the high-pressure airflow input from the outside and provide a stable air source supply for multiple sets of backflush air passages. A first connector 320 is provided on the inner side of the connecting air ring 319 corresponding to multiple sets of first self-closing connectors 317. The first connector 320 is used to connect with the first self-closing connector 317 to realize the air passage connection between the connecting air ring 319 and the air outlet channel 313.

[0068] In this embodiment, when multiple sets of sliding sealing plates 301 move to the peripheral sealing position with the sliding block 306, the connecting block 316 moves synchronously with the connecting pipe 310 to the corresponding peripheral position. The first self-closing connector 317 at the top of the connecting block 316 and the first connector 320 inside the connecting air ring 319 are connected and connected. After the first self-closing connector 317 and the first connector 320 are connected, the air passage is automatically opened. The high-pressure airflow in the connecting air ring 319 passes through the first connector 320, the first self-closing connector 317, the elbow 315, the connecting pipe 310, the air outlet channel 313 in the sliding block 306 and the connecting rod 308, and the one-way air valve 314 in sequence, and enters the air outlet groove 311. Finally, it is sprayed out from the air outlet groove 311 to the end face of the corresponding second particle capturing carrier 202, capturing the second particle. The carbon deposits and particles in the pores of the particle capture carrier 202 are cleaned by backflushing. When multiple sets of sliding sealing plates 301 move to the central sealing position with the sliding block 306, the connecting block 316 moves synchronously with the connecting pipe 310 to a position close to the center. The first self-closing connector 317 disconnects from the first connecting head 320 and automatically closes the port to prevent gas leakage and impurities from entering. The second self-closing connector 318 at the bottom of the connecting block 316 completes docking and conduction with the fixed air passage connector at the corresponding position, so that the high-pressure airflow in the connecting air ring 319 can enter the air outlet channel 313 through the second self-closing connector 318, and finally sprays out from the air outlet slot 311 to the end face of the first particle capture carrier 201 to clean the carbon deposits and particles in the pores of the first particle capture carrier 201 by backflushing.

[0069] The fixed disk 303 has multiple sets of first mounting slots 321 around its periphery. The inner side of the exhaust gas particulate capture housing 104 has second passage slots 322 corresponding to the multiple sets of first mounting slots 321. Multiple sets of connecting pipes 323 have one end passing through the multiple sets of second passage slots 322 and connecting to the multiple sets of first mounting slots 321. The other end of each connecting pipe 323 is connected to a connecting air ring 319. The connecting pipes 323 are used to connect the connecting air ring 319 to the corresponding air passage on the fixed disk 303, providing a delivery channel for high-pressure airflow. Multiple sets of second self-closing connectors 318 are provided around the fixed disk 303 corresponding to the multiple sets of second self-closing connectors 318. The second mounting slot 324 has a second connector 325 in each of the multiple second mounting slots 324. The second connector 325 is used to connect and communicate with the second self-closing connector 318. The fixed plate 303 has multiple sets of connecting ventilation ducts 326 on its periphery. One end of the multiple sets of connecting ventilation ducts 326 is connected to the multiple sets of second connectors 325 respectively. The other end of the multiple sets of connecting ventilation ducts 326 is connected to the connecting air ring 319 through multiple sets of connecting pipes 323 respectively. This allows the high-pressure airflow in the connecting air ring 319 to enter the connecting ventilation duct 326 through the connecting pipes 323 and then be transported to the air outlet duct 313 through the second connector 325.

[0070] In this embodiment, when the sliding block 306 is in the central sealing position, the sliding block 306 moves along the sliding groove 305 to a position close to the center, driving the connecting block 316 to move synchronously, so that the second self-closing connector 318 at the bottom of the connecting block 316 mates with the second connector 325 in the second mounting groove 324. After the second self-closing connector 318 mates with the second connector 325, the air passage is automatically opened. At this time, the high-pressure airflow in the connecting air ring 319 enters the second connector 325 through the connecting pipe 323 and the connecting ventilation duct 326 in sequence, and then through the second self-closing connector. Air enters the connecting block 316 via 318, then flows through the elbow 315, connecting pipe 310, sliding block 306, and connecting rod 308 via the outlet channel 313. After passing through the one-way valve 314, it is ejected from the outlet slot 311. The ejected high-pressure airflow acts on the end face of the first particle capture carrier 201, blowing out the carbon deposits and particles attached to the pores of the first particle capture carrier 201. At the same time, the sliding sealing plate 301 seals the end of the first particle capture carrier 201, forcing the exhaust gas into multiple sets of second particle capture carriers 202 to complete filtration without affecting the device. Normal operation; when the sliding block 306 is in the peripheral sealing position, the sliding block 306 moves along the sliding groove 305 to a position away from the center, driving the connecting block 316 to move synchronously, so that the first self-closing connector 317 at the top of the connecting block 316 aligns with the first connector 320 inside the connecting air ring 319. After the first self-closing connector 317 aligns with the first connector 320, the air passage is automatically opened. The high-pressure airflow in the connecting air ring 319 enters the first self-closing connector 317 through the first connector 320, and then flows through the elbow 315, connecting pipe 310, and sliding block 316. The air outlet channel 313 inside the connecting rod 308, after passing through the one-way air valve 314, is ejected from the air outlet slot 311. The ejected high-pressure airflow acts on the end faces of multiple sets of second particle capture carriers 202, blowing out the carbon deposits and particles attached to the channels of multiple sets of second particle capture carriers 202, thereby cleaning the multiple sets of second particle capture carriers 202. At the same time, the sliding sealing plate 301 seals the ends of multiple sets of second particle capture carriers 202, forcing the exhaust gas into the first particle capture carrier 201 to complete the filtration, thereby realizing the alternating operation and cleaning of the carriers.

[0071] A vent pipe 327 is provided on one side of the connecting air ring 319. One end of the vent pipe 327 is connected to a high-pressure air pump, which generates a high-pressure airflow that is delivered to the connecting air ring 319 through the vent pipe 327 to provide power for the backflushing cleaning operation. The vent pipe 327 is equipped with an atomizing nozzle 328 for connecting to an external cleaning agent filling device and a pipe connector 329 for connecting to an external cleaning liquid filling device. The atomizing nozzle 328 atomizes the externally supplied cleaning agent, allowing it to be distributed with the high-pressure airflow and adhere to the inner wall of the pores of the particle capture carrier, enhancing the cleaning effect. The pipe connector 329 is used to connect to an external cleaning liquid filling device, allowing cleaning liquid to be directly injected into the vent pipe 327 to achieve deep cleaning of the carrier pores and improve the particle capture effect. Two sets of second maintenance slots 330 are provided at the bottom of the outer shell 104. The two sets of second maintenance slots 330 are located at both ends of the first particle capture carrier 201 and multiple sets of second particle capture carriers 202, respectively. The second maintenance slots 330 provide channels for the discharge of cleaning waste liquid and carbon deposits detached by backflushing. They also provide operating space for end maintenance of the first particle capture carrier 201. Each of the two sets of second maintenance slots 330 is rotatably equipped with a sealing drain plate 331. The sealing drain plate 331 can realize the opening and closing of the second maintenance slots 330. Under normal working conditions, it is kept closed to prevent exhaust gas from leaking from the slot and to block external mud, water and debris from entering the exhaust gas particle capture outer shell 104. Under maintenance conditions, it can be opened to facilitate drainage and maintenance operations.

[0072] In this embodiment, when performing parking maintenance, first confirm that the tow truck is in a parked and off state, shut off the normal operating air circuit of the device, connect the external cleaning agent filling device to the atomizing nozzle 328, and connect the external cleaning liquid filling device to the pipe connector 329. Then, start the high-pressure air pump. The high-pressure airflow generated by the high-pressure air pump is delivered through the vent pipe 327. At the same time, the external cleaning agent is atomized through the atomizing nozzle 328 and mixed with the high-pressure airflow. The external cleaning liquid is injected into the vent pipe 327 through the pipe connector 329. The atomized cleaning agent and cleaning liquid enter the connecting air ring 319 together with the high-pressure airflow, and are then delivered to the air outlet slot 311 through the corresponding air passage. From the air outlet slot 311, it is sprayed onto the end face of the particle capture carrier that needs to be cleaned, wetting and softening the carrier. The carbon deposits and stubborn particles inside the channels, combined with the backflushing effect of the high-pressure airflow, can remove the carbon deposits and particles inside the carrier channels, achieving deep cleaning of the carrier. At the same time, by opening the sealed drain plate 331 at the bottom of the exhaust gas particulate capture shell 104, the waste liquid generated during the cleaning process, as well as the carbon deposits and particles that are blown off by the backflushing, will be discharged outside the device through the second maintenance slot 330 under the action of gravity and airflow. This can promptly discharge cleaning waste liquid and dirt, preventing secondary deposition of dirt inside the device and avoiding a decrease in filtration efficiency due to carbon buildup. After cleaning and draining are completed, the external cleaning equipment is turned off, the sealed drain plate 331 is closed, and the high-pressure air pump is stopped, and the device can return to normal working status, ensuring the stable operation of subsequent exhaust gas filtration.

[0073] A second external gear ring 332 is provided around the rotating disk 302. A connecting slot 333 is provided on the outer side of the exhaust particulate capture housing 104. A second mounting base 334 is provided on one side of the connecting slot 333. A blocking motor 335 is provided on the second mounting base 334 for driving the rotating disk 302 to rotate between the central blocking position and the peripheral blocking position. The blocking motor 335 can output forward or reverse rotational power to realize bidirectional rotation of the rotating disk 302, thereby driving the sliding blocking plate 301 to complete the switching between the two blocking positions. The shaft end of the blocking motor 335 is connected to the second external gear ring 332 through a gear. Through the meshing transmission of the gear and the second external gear ring 332, the blocking motor 335... Rotational power is transmitted to the rotating disk 302. Two sets of second sliding sealing rings 336 are also provided on the periphery of the rotating disk 302. The two sets of second sliding sealing rings 336 are located on both sides of the second outer gear ring 332. The second sliding sealing rings 336 are used to fill the mating gaps between the periphery of the rotating disk 302 and the inner side of the exhaust gas particulate capture shell 104 and the fixed disk 303. Throughout the entire process of the rotating disk 302 rotating and stationary, the contact surface is always sealed to prevent exhaust gas from leaking from the mating gaps. At the same time, it prevents dust and carbon deposits inside the device from entering the meshing part of the second outer gear ring 332 and the transmission gear, avoiding wear and jamming of the transmission components and ensuring the long-term stable operation of the transmission structure.

[0074] In this embodiment, when it is necessary to seal and exhaust the second particle capture carrier 202 and switch to the first particle capture carrier 201, the sealing motor 335 is started. The gear at the shaft end of the sealing motor 335 drives the second external gear ring 332 to rotate. The second external gear ring 332 drives the rotating disk 302 to rotate synchronously until the rotating disk 302 rotates to the peripheral sealing position. At this time, the rotating disk 302, through the cooperation of the arc-shaped sliding groove 304 and the actuating rod 307, drives multiple sets of sliding blocks 306 to be located at positions away from the center of multiple sets of radially distributed sliding through grooves 305. The sliding blocks 306, through the connecting rod 308, drive multiple sets of sliding sealing plates 301 to move to the peripheral area, sealing the ends of multiple sets of second particle capture carriers 202, forcing the exhaust gas into the first particle capture carrier 201 to complete filtration, and at the same time, the second particle capture carrier 202 can be backflushed and cleaned. When it is necessary to seal and exhaust the first particle capture carrier 201 and switch to the second particle capture carrier 202, The blocking motor 335 is started and rotates in reverse. The blocking motor 335 drives the rotating disk 302 to rotate in reverse to the center blocking position through the meshing of the gear and the second external gear ring 332. At this time, the rotating disk 302 drives multiple sets of sliding blocks 306 to be positioned near the center of multiple sets of radially distributed sliding channels 305 through the cooperation of the arc-shaped sliding groove 304 and the actuating rod 307. The sliding blocks 306 drive multiple sets of sliding blocking plates 301 to move to the central area through the connecting rod 308, blocking the end of the first particle capture carrier 201, forcing the exhaust gas into multiple sets of second particle capture carriers 202 to complete the filtration, and at the same time, the first particle capture carrier 201 can be backflushed and cleaned. During the entire blocking position switching process, the two sets of second sliding sealing rings 336 continue to maintain a sealed state to prevent exhaust gas leakage. After the blocking motor 335 stops working, it locks and fixes the position of the rotating disk 302 to ensure the stability of the blocking state of the sliding blocking plate 301 and ensure the normal operation of the device filtration.

[0075] The specific usage and function of this embodiment: The exhaust gas generated by the engine on the clearing vehicle body 101 is transported to the oxidation catalyst 102 through the exhaust pipe. The oxidation catalyst 102 oxidizes the carbon monoxide and hydrocarbons in the exhaust gas. The exhaust gas after treatment by the oxidation catalyst 102 enters the exhaust gas particulate capture structure. The first particulate capture carrier 201 and multiple sets of second particulate capture carriers 202 achieve physical interception of carbon soot and solid particulate matter in the exhaust gas. The rigid chain 210 of the exhaust gas particulate capture structure and the multiple sets of second particulate capture carriers 202 are in the working position, and the multiple sets of second particulate capture carriers 202 surround the first particulate capture carrier 201. At this time, the blocking motor 335 is started, and the rotating disk 302 is driven to rotate through the meshing of the gear and the second external gear ring 332, and the blocking position is switched according to the exhaust gas filtration requirements. When the sealing motor 335 drives the rotating disk 302 to the peripheral sealing position, the arc-shaped sliding groove 304 on the rotating disk 302 drives multiple sets of sliding blocks 306 to move away from the center along the radially distributed sliding channels 305 via the actuating rod 307. The sliding blocks 306 drive multiple sets of sliding sealing plates 301 to move to the peripheral area via the connecting rod 308, sealing the ends of multiple sets of second particulate capture carriers 202. At this time, the exhaust gas treated by the oxidation catalyst 102 enters the interior of the first particulate capture carrier 201 through the first airflow guide hole 206 to complete filtration. The first dynamic sealing ring 207 and the second dynamic sealing ring 209 ensure that the exhaust gas does not leak without filtration. Simultaneously, the first self-closing connector 317 at the top of the connecting block 316 connects to the first connector 320 inside the connecting air ring 319. The high-pressure airflow inside the connecting air ring 319 is ejected from the air outlet slot 311 through the air outlet channel 313, backflushing and cleaning the carbon deposits and particles in the multiple sets of second particle capture carriers 202 in the blocked state, realizing the alternating operation and cleaning of the carriers. When the first particle capture carrier 201 has too much carbon deposits affecting the exhaust, the blocking motor 335 reverses the drive, driving the rotating disk 302 to the central blocking position, the sliding block 306 moves to a position close to the center, and the sliding blocking plate 301 moves to the central area, blocking the end of the first particle capture carrier 201. At this time, the exhaust gas enters the second particulate capture carrier 202 through multiple sets of second airflow guide holes 208 to complete filtration. The second self-closing connector 318 at the bottom of the connecting block 316 connects with the second connector 325 in the second mounting groove 324. The high-pressure airflow in the connecting air ring 319 is sprayed out from the air outlet groove 311 through the connecting air duct 326 and the air outlet channel 313 to backflush and clean the first particulate capture carrier 201.

[0076] When the second particulate capture carrier 202 needs to be disassembled and maintained, ensure that the tow truck is parked and the engine is off. Open the sealing maintenance plate 214 at the bottom of the exhaust particulate capture housing 104, start the maintenance motor 222, and drive the airflow guide plate 204 to rotate through the meshing of the gear and the first external gear ring 218. The airflow guide plate 204 drives the rigid chain 210 to move along the sliding track 212, transferring the rigid chain 210 and multiple sets of second particulate capture carriers 202 to the maintenance position. Multiple sets of second particulate capture carriers 202 are moved out to the bottom of the housing along with the rigid chain 210, expanding the disassembly and assembly operation space. The replacement and maintenance of a single carrier can be completed without the need for the entire device to be disassembled, which is suitable for outdoor emergency maintenance needs. After maintenance is completed, the maintenance motor 222 drives in reverse to reset the rigid chain 210 and the second particulate capture carriers 202 to the working position, the sealing maintenance plate 214 is closed, and the device resumes the normal exhaust gas filtration process.

[0077] During deep parking maintenance, open the sealed drain plate 331, connect the external cleaning agent filling device to the atomizing nozzle 328, and connect the external cleaning fluid filling device to the pipeline connector 329. Start the high-pressure air pump, and the high-pressure airflow is delivered through the vent pipe 327. At the same time, the external cleaning agent is atomized through the atomizing nozzle 328, and the cleaning fluid is injected through the pipeline connector 329. The mixed airflow enters the connecting air ring 319, and is then delivered to the air outlet sump 311 through the corresponding air passage. It is sprayed onto the end face of the particle capture carrier, wetting, softening, and removing carbon deposits and stubborn particles in the pores. Waste liquid and detached dirt generated during the cleaning process are discharged through the second maintenance sump 330 to avoid secondary internal deposition.

[0078] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A tow truck with an exhaust particulate capture structure, characterized in that, include: The main body of the recovery vehicle is equipped with an engine. One end of the exhaust pipe is connected to the exhaust end of the engine, and the other end of the exhaust pipe is connected to the oxidation catalyst. The exhaust particulate matter capture structure is installed between the oxidation catalyst and the muffler. The structure includes a first particulate matter capture carrier located in a working or maintenance position, and multiple sets of second particulate matter capture carriers. When the first particulate matter capture carrier and the multiple sets of second particulate matter capture carriers are in the working position, the first particulate matter capture carrier is coaxial with the oxidation catalyst, and the multiple sets of second particulate matter capture carriers surround the first particulate matter capture carrier to capture exhaust particles. When the first particulate matter capture carrier and the multiple sets of second particulate matter capture carriers are in the maintenance position, the multiple sets of second particulate matter capture carriers are located at the bottom of the first particulate matter capture carrier for easy disassembly. The sealing plug structure is installed on one side of the first particle capturing carrier and multiple sets of second particle capturing carriers. The sealing plug structure includes multiple sets of sliding sealing plates located at the central sealing position or the peripheral sealing position.

2. A tow truck with a particulate matter capture structure according to claim 1, characterized in that: One end of the oxidation catalyst is connected to the exhaust gas particulate capture shell. An airflow guide plate is provided inside the exhaust gas particulate capture shell. A heat insulation pipe is provided on one side of the airflow guide plate. The first particulate capture carrier passes through the heat insulation pipe. A first airflow guide hole is opened on the other side of the airflow guide plate corresponding to the first particulate capture carrier. The first airflow guide hole is connected to the first particulate capture carrier. A first dynamic sealing ring is provided between the first airflow guide hole and the first particulate capture carrier. Multiple sets of second particle capture carriers surround the outside of the heat insulation tube. On one side of the airflow guide plate, multiple sets of second airflow guide holes are opened corresponding to the multiple sets of second particle capture carriers. The multiple sets of second airflow guide holes are connected to the multiple sets of second particle capture carriers respectively. Multiple sets of second dynamic sealing rings are respectively provided between the multiple sets of second airflow guide holes and the multiple sets of second particle capture carriers.

3. A tow truck with an exhaust particulate capture structure according to claim 2, characterized in that: The exhaust gas particulate capture structure includes two sets of rigid chains located in the working or maintenance position. Two sets of guide rings are provided inside the exhaust gas particulate capture shell. The two sets of guide rings are located on both sides of the first particulate capture carrier and multiple sets of second particulate capture carriers, respectively. The two ends of the multiple sets of second particulate capture carriers are respectively connected to the two sets of rigid chains. Both sets of guide rail rings are provided with sliding rails, and two sets of rigid chains are slidably connected to the two sets of sliding rails respectively. The bottom of the exhaust gas particulate capture shell is provided with a first maintenance slot, and a sealing maintenance plate is rotatably installed in the first maintenance slot. The bottom of the guide rail ring is provided with a transition slot corresponding to the first maintenance slot, and the transition slot is connected to the bottom of the sliding rail. When the rigid chain is in the working position, the sealing and maintenance plate is closed, and the rigid chain and multiple sets of second particulate capture carriers are located inside the exhaust particulate capture shell and surround the heat insulation pipe to capture exhaust particulates. When the rigid chain is in the maintenance position, the sealing maintenance plate opens, and one end of the rigid chain passes through the first maintenance slot and the transfer slot and is installed at the bottom of the exhaust gas particulate capture shell. Multiple sets of second particulate capture carriers are located at the bottom of the exhaust gas particulate capture shell for easy disassembly.

4. A tow truck with an exhaust particulate capture structure according to claim 3, characterized in that: The inner side of the exhaust particulate capture shell is equipped with two sets of sliding seats corresponding to the airflow guide plate. A rotating ring is provided on one side of the airflow guide plate. The circumference of the rotating ring is slidably connected to the two sets of sliding seats. One end of a rigid chain away from the transfer slot is connected to the airflow guide plate. The airflow guide plate is provided with a first outer gear ring and two sets of first sliding sealing rings on its periphery. The two sets of first sliding sealing rings are located on both sides of the first outer gear ring. The inner side of the exhaust gas particulate capture shell is in contact with the two sets of first sliding sealing rings. The outer side of the exhaust gas particulate capture shell is provided with a first through slot corresponding to the first outer gear ring. A first mounting seat is provided on one side of the first through slot. A maintenance motor for driving a rigid chain to move between the working position and the maintenance position is provided on the first mounting seat. The shaft end of the maintenance motor is connected to the first outer gear ring through a gear.

5. A tow truck with an exhaust particulate capture structure according to claim 2, characterized in that: The sealing plug structure includes a rotating disk located at the central sealing position or the peripheral sealing position. A fixed disk is fixedly installed inside the exhaust gas particulate capture shell. A rotating disk is rotatably installed on one side of the fixed disk. Multiple sets of arc-shaped sliding grooves are opened on the rotating disk corresponding to multiple sets of second particulate capture carriers. Multiple sets of sliding through grooves are opened on the fixed disk corresponding to multiple sets of arc-shaped sliding grooves. The multiple sets of sliding through grooves are radially distributed. A sliding block is slidably installed in each of the multiple sets of sliding through grooves. A toggle rod is provided on the side of the sliding block near the rotating disk. The toggle rod passes through the arc-shaped sliding groove. When the rotating disk is in the center blocking position, multiple sets of sliding blocks are located near the center of multiple sets of radially distributed sliding channels; When the rotating disk is in the peripheral sealing position, multiple sets of sliding blocks are located in multiple sets of radially distributed sliding channels at positions away from the center.

6. A tow truck with an exhaust particulate capture structure according to claim 5, characterized in that: Each set of sliding blocks is provided with a connecting rod on one side. The end of the connecting rod away from the sliding block is connected to the sliding sealing plate. The fixed plate is provided with multiple sliding holes corresponding to the multiple sliding slots. The bottom of the multiple sliding holes is connected to the multiple sliding slots. The top of each set of sliding blocks is provided with a connecting pipe. The multiple connecting pipes are slidably inserted into the multiple sliding holes. Each set of sliding sealing plates has an air outlet slot on one side, and a third dynamic sealing ring is provided around the air outlet slot. When multiple sets of sliding sealing plates are located in the central sealing position, the air outlet slots on one side of multiple sets of sliding sealing plates are connected to the first particle capture carrier, and one side of multiple sets of third dynamic sealing rings is in contact with the first particle capture carrier. When multiple sets of sliding sealing plates are located in the peripheral sealing position, the air outlet slots on one side of the multiple sets of sliding sealing plates are connected to multiple sets of second particle capture carriers, and one side of multiple sets of third dynamic sealing rings is in contact with multiple sets of second particle capture carriers.

7. A tow truck with an exhaust particulate capture structure according to claim 6, characterized in that: The connecting pipe, sliding block, and connecting rod are provided with sequentially connected air outlet channels. One end of the air outlet channel is provided with a one-way air valve that connects to the air outlet slot. The top of multiple sets of connecting pipes is provided with elbows, and a connecting block is provided on one side of the elbow. The top of the connecting block is provided with a first self-closing connector, and the bottom of the connecting block is provided with a second self-closing connector. The other end of the air outlet channel is connected to the first self-closing connector and the second self-closing connector. A connecting air ring is provided around the exhaust gas particulate capture shell. The inner side of the connecting air ring is provided with a first connector corresponding to multiple sets of first self-closing connectors.

8. A tow truck with an exhaust particulate capture structure according to claim 7, characterized in that: The fixed plate has multiple sets of first mounting slots around its periphery. The inner side of the exhaust particulate capture housing has a second passage slot corresponding to the multiple sets of first mounting slots. One end of multiple sets of connecting pipes passes through multiple sets of second passage slots and connects to multiple sets of first mounting slots. The other end of each set of connecting pipes is connected to a connecting air ring. The fixed plate has multiple sets of second mounting slots corresponding to multiple sets of second self-closing joints around its periphery. Each set of second mounting slots has a second connector. The fixed plate has multiple sets of connecting ventilation ducts around its periphery. One end of each set of connecting ventilation ducts is connected to multiple sets of second connectors. The other end of each set of connecting ventilation ducts is connected to a connecting air ring through multiple sets of connecting pipes. When the sliding block is in the center sealing position, the second self-closing joint at the bottom of the connecting block is connected to the second connecting head, and the airflow in the connecting ring is sprayed out from the air outlet through the connecting pipe, the connecting ventilation duct, and the air outlet channel in sequence, blowing out the carbon deposits and particles in the pores of the first particle capture carrier. When the sliding block is in the peripheral sealing position, the first self-closing joint at the top of the connecting block connects to the first connecting head, and the airflow in the connecting ring is sprayed out from the air outlet through the air outlet channel, blowing out the carbon deposits and particles in the multiple sets of second particle capture carrier pores.

9. A tow truck with an exhaust particulate capture structure according to claim 7, characterized in that: A vent pipe is provided on one side of the air ring. One end of the vent pipe is connected to a high-pressure air pump. The vent pipe is equipped with an atomizing nozzle for connecting to an external cleaning agent filling device and a pipe connector for connecting to an external cleaning liquid filling device. Two sets of second maintenance slots are opened at the bottom of the exhaust gas particulate capture shell. The two sets of second maintenance slots are located at both ends of the first particulate capture carrier and multiple sets of second particulate capture carriers, respectively. A sealing drain plate is rotatably installed in both sets of second maintenance slots.

10. A tow truck with a particulate matter capture structure according to claim 5, characterized in that: A second external gear ring is provided on the periphery of the rotating disk, and a connecting slot is provided on the outer side of the exhaust gas particulate capture shell. A second mounting seat is provided on one side of the connecting slot. A blocking motor for driving the rotating disk to rotate between the central blocking position and the peripheral blocking position is provided on the second mounting seat. The shaft end of the blocking motor is connected to the second external gear ring through a gear. Two sets of second sliding sealing rings are also provided around the rotating disk, with the two sets of second sliding sealing rings located on both sides of the second external gear ring.

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