CN220285853U - Protective post-treatment device - Google Patents

Abstract

The application discloses a protective type aftertreatment device, which comprises a aftertreatment device, a primary protective cover, a secondary protective cover and a tertiary protective cover; the post-processor comprises a processing module and a functional module for assisting the processing module to work, and the primary protective cover is mainly covered outside the processing module and can hide and protect the processing module; the first-stage protective cover is provided with a first mounting opening, and the second-stage protective cover is arranged on the first mounting opening and can hide and protect the processing module; the second-level protective cover is provided with a second mounting opening, and the third-level protective cover is arranged on the second mounting opening, so that an external structure can be hidden and protected; the heat dissipation holes are formed in the protective cover, so that heat generated by tail gas and working of the post-processor can be dissipated in an auxiliary mode, and foreign matters such as straw can be prevented from contacting the post-processor; the primary protective cover, the secondary protective cover and the tertiary protective cover are all arranged in a detachable mode, so that the operation such as installation and maintenance of various parts of a post-processor arranged in the protective cover can be facilitated.

Description

Protective post-treatment device

Technical Field

The application relates to the technical field of agricultural machinery aftertreatment equipment, in particular to a protective aftertreatment device.

Background

The method is used for further promoting the guard war operation of the blue sky and is environment-friendly and becomes a basic national policy of China. The country has implemented regulations for emissions from non-road countries four since day 1 of 12 in 2022. Wherein, related agricultural machinery, engineering machinery and other vehicle types need to upgrade the post-treatment device on the whole vehicle. Compared with the traditional post-treatment device, the post-treatment device in four stages of China can meet great challenges in terms of performance, reliability and the like.

Currently, when designing aftertreatment devices for agricultural tractors, it is found that the aftertreatment devices require consideration of external protection. On one hand, the post-treatment device is protected, so that the post-treatment device is ensured to work normally; on the other hand, the periphery of the post-processing device is protected, and the phenomenon that foreign matters such as straw and the like move into the post-processing device in the operation process of the tractor to influence the performance of the post-processing device and even bring a light-off risk is avoided.

Disclosure of Invention

The purpose of this application is to overcome the not enough that exists among the prior art, provides a protection type aftertreatment device.

To achieve the above technical object, the present application provides a protection type aftertreatment device, including: a post-processor for purifying exhaust gas to be treated; the first-stage protective cover is detachably covered outside the post-processor and is provided with a first mounting opening; the second-level protective cover is detachably arranged on the first mounting port, and a second mounting port is formed in the second-level protective cover; the third-stage protective cover is detachably arranged on the second mounting port; wherein, all be equipped with the louvre on one-level protection casing, second grade protection casing and the tertiary protection casing.

Further, the post-processor comprises a processing module and a functional module; the treatment module comprises a DOC module, a DPF module and an SCR module, wherein the DOC module, the DPF module and the SCR module are sequentially arranged, and the waste gas to be treated can sequentially pass through the DOC module, the DPF module and the SCR module; the functional module comprises: the differential pressure detection mechanism is used for detecting the differential pressure in the DPF module; the temperature detection mechanism is used for detecting the temperatures in the DOC module and the SCR module; the urea injection mechanism is used for injecting urea into the SCR module; and the nitrogen-oxygen detection mechanism is used for detecting the nitrogen oxide value in the gas passing through the SCR module.

Further, the aftertreatment device further comprises a clamp, the DOC module and the DPF module are in fastening connection through one clamp, and the DPF module and the SCR module are in fastening connection through the other clamp; and/or the surfaces of the DOC module, the DPF module and the SCR module are provided with heat insulation layers.

Further, the differential pressure detection mechanism includes: a differential pressure sensor; the first air duct is arranged close to the air inlet end of the DPF module and is communicated with the DPF module and the differential pressure sensor; the second air duct is arranged close to the air outlet end of the DPF module and is communicated with the DPF module and the differential pressure sensor.

Further, the temperature detection mechanism includes: a temperature sensor; the first probe is arranged close to the air inlet end of the DOC module and is connected with the DOC module and the temperature sensor; the second probe is arranged close to the air outlet end of the DOC module and is connected with the DOC module and the temperature sensor; and the third probe is arranged close to the air inlet end of the SCR module and is connected with the SCR module and the temperature sensor.

Further, the urea injection mechanism includes: the nozzle is communicated with the SCR module and used for injecting urea into the SCR module; a urea runner pipe communicated with the nozzle and used for supplying urea to the nozzle; and the cooling water pipe is used for circulating cooling water, and the cooling water can exchange heat with urea in the urea flow pipe through the cooling water pipe.

Further, the post-processor also comprises heat insulation cotton which is arranged on the pressure difference detection mechanism and/or the nitrogen-oxygen detection mechanism and is used for preventing the ablation condition; and/or the post-processor further comprises an aluminum foil tape, wherein the aluminum foil tape is used for wrapping the wire harness of the functional module and preventing the ablation; and/or the secondary protective cover is covered outside the functional module, and a heat-resistant adhesive tape is arranged in the secondary protective cover and used for preventing the wiring harness of the functional module from being scratched; and/or the secondary protective cover is provided with an auxiliary bracket which is used for facilitating the installation of the urea runner pipe and the cooling water pipe.

Further, the primary shield comprises: the first cover body and the second cover body can be matched with the post-processor from two radial sides, and the first cover body and the second cover body are detachably connected; the cover top is used for sleeving and fixing the top ends of the first cover body and the second cover body; wherein, the first cover body and the second cover body are provided with heat dissipation holes; the first mounting opening is arranged on the second cover body.

Further, the top of the cover top is arranged to be conical, and the angle of the cover top is 130 degrees; and/or the cover top is provided with a lifting lug.

Further, a plurality of rows of heat dissipation holes are formed in the first-stage protective cover, the second-stage protective cover and/or the third-stage protective cover; any two rows of adjacent heat sinks Kong Cancha are arranged; any heat dissipation hole is a round hole, and the aperture of the heat dissipation hole is 3mm; the center distance between any two rows of adjacent radiating holes is 6mm; the center distance between two adjacent heat dissipation holes in any row is 3.5mm.

The application provides a protective type aftertreatment device, which comprises a aftertreatment device, a primary protective cover, a secondary protective cover and a tertiary protective cover; the post-processor comprises a processing module and a functional module for assisting the processing module to work, and the primary protective cover is mainly covered outside the processing module and can hide and protect the processing module; the first-stage protective cover is provided with a first mounting opening, and the functional module can be exposed outwards through the first mounting opening so as to facilitate the operations of mounting, overhauling and the like; the second-level protective cover is arranged on the first mounting port and can hide and protect the processing module; the second-level protective cover is provided with a second mounting opening, and a structure for being externally connected with the functional module can be externally exposed through the second mounting opening so as to be convenient for mounting, overhauling and other operations; the third-level protective cover is arranged on the second mounting port and can hide and protect the external structure; the heat dissipation holes are formed in the protective cover, so that heat generated by tail gas and working of the post-processor can be dissipated in an auxiliary mode, and foreign matters such as straw can be prevented from contacting the post-processor. For the functional module and the external structure, the secondary protective cover and the tertiary protective cover also provide independent installation areas for the functional module and the external structure, are beneficial to being away from the processing module, so that the functional module and the processing module are prevented from being scratched and rubbed with each other, and the ablation risk is reduced. The processing module and the external structure are positioned in the secondary protective cover and the tertiary protective cover, and the configuration of the secondary protective cover and the tertiary protective cover is smaller, so that the processing module and the external structure can be prevented from shaking, and the stability and the reliability of the equipment are improved. In addition, the primary protective cover, the secondary protective cover and the tertiary protective cover are all arranged in a detachable mode, so that the operation of installation, maintenance, replacement, cleaning and the like of each part of the postprocessor arranged in the protective cover can be conveniently carried out; when a fault occurs, the protective cover can be correspondingly removed according to the fault position, so that the disassembly operation is simplified.

Drawings

Fig. 1 is a schematic structural diagram of a protective aftertreatment device provided in the present application;

FIG. 2 is a cross-sectional view of the protective aftertreatment device shown in FIG. 1;

FIG. 3 is a cross-sectional view of the post-processor of FIG. 2;

FIG. 4 is a schematic view of the secondary shield of FIG. 2;

fig. 5 is a schematic structural view of the three-stage shield of fig. 2.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

The application provides a protection type aftertreatment device, including: an aftertreatment device 100 for purifying exhaust gas to be treated; the first-stage protection cover 210 is detachably covered outside the post-processor 100, and a first mounting opening 210a is formed in the first-stage protection cover 210; the second-stage protection cover 220 is detachably arranged on the first mounting port 210a, and a second mounting port 220a is arranged on the second-stage protection cover 220; the third-stage protection cover 230 is detachably arranged on the second mounting port 220a; wherein, the primary protective cover 210, the secondary protective cover 220 and the tertiary protective cover 230 are respectively provided with a heat dissipation hole 200a.

The aftertreatment device 100 is used to purify exhaust gas from vehicle operation. The processing module of the aftertreatment device 100 may be one or more of a DOC module 111 (diesel oxidation catalyst Diesel Oxidation Catalyst), a DPF module 112 (diesel particulate filter Diesel Particulate Filter), and an SCR module 113 (selective catalytic reduction SelectiveCatalytic Reduction). The primary protection cover 210 is mainly covered outside the processing module, can hide and protect the processing module, and the heat dissipation holes 200a on the primary protection cover 210 can assist in dissipating tail gas and heat generated by the operation of the post-processor 100 and can prevent foreign matters such as straw from contacting the post-processor 100.

It is easy to understand that, in order to ensure the processing module to work normally, the processing module also needs to be externally connected with a cable, a pipeline (such as an air pipe and a water pipe), a controller, a detector and other functional modules; for the electric mechanism for the controller, the detector, etc., it is also necessary to further access the corresponding external structure such as the pipeline, the cable, etc. If the functional module, the external structure and the processing module are directly wrapped in the primary protection cover 210, the processing module is easy to interfere, heat dissipation is affected, potential safety hazards are brought, the primary protection cover 210 is required to be removed in a large scale during the operations of maintenance, replacement and the like in the later stage, and the operation is complicated.

For this reason, the first mounting opening 210a is provided on the first-stage protection cover 210, and the functional module can be exposed to the outside through the first mounting opening 210a, so as to facilitate the operations of mounting, maintenance, etc.; after the process module is installed and debugged, the second-level protective cover 220 is installed on the first installation opening 210a, and the process module can be protected by the second-level protective cover 220.

Further, a second mounting opening 220a is provided on the secondary protective cover 220, and a structure for connecting with the functional module can be exposed outwards through the second mounting opening 220a, so as to facilitate the operations of mounting, maintenance, etc.; after the external structure is installed and debugged, the third-level protective cover 230 is installed on the second installation opening 220a, and the external structure can be protected by the third-level protective cover 230.

The heat dissipation holes 200a on the secondary protection cover 220 and the tertiary protection cover 230 can also assist in dissipating heat generated by the exhaust gas and the operation of the post-processor 100, and prevent foreign matters such as straw from contacting the post-processor 100. The provision of the secondary shield 220 and the tertiary shield 230 also provides them with independent mounting areas for the functional modules and the external structure, facilitating their distance from the process module, thereby avoiding their rubbing against the process module and reducing the risk of ablation. The processing module and the external structure are positioned in the secondary protective cover 220 and the tertiary protective cover 230, and the configuration of the secondary protective cover 220 and the tertiary protective cover 230 is smaller, so that the processing module and the external structure can be prevented from shaking, and the stability and the reliability of equipment can be improved.

In addition, the primary protection cover 210, the secondary protection cover 220 and the tertiary protection cover 230 are all provided in a detachable form, so that the operations of installation, maintenance, replacement, cleaning and the like of each component of the post-processor 100 arranged in the protection cover can be facilitated. When a fault occurs, the protective cover can be correspondingly removed according to the fault position, so that the disassembly operation is simplified.

The primary protection cover 210, the secondary protection cover 220 and the tertiary protection cover 230 can be detachably connected in a threaded connection, an inserting connection, a buckling connection and the like. The specific manner of mounting the shield is not limited in this application.

In one embodiment, referring to fig. 1 to 3, the surface of the post-processor 100 is provided with a first support 162; the first support 162 is generally shaped like a Chinese character 'ji', and two legs of the first support 162 are fixedly connected with the post-processor 100, and the middle part of the first support extends outwards and is used for connecting with the first-stage protection cover 210. The middle part of the first support 162 is provided with a screw hole, and the first-stage protective cover 210 is correspondingly provided with a mounting hole; when the primary protective cover 210 is installed, the installation holes (which can be screw holes, common through holes or slots) on the primary protective cover 210 are aligned with the screw holes on the first support 162, and the primary protective cover 210 can be fastened on the first support 162 by screwing in the screws; the screw is unscrewed, and the primary protection cover 210 can be conveniently detached. In addition, the zigzag structure of the first support 162 protrudes outwards, so that the first-stage protection cover 210 is arranged at intervals with the post-processor 100 while covering the post-processor 100, so that the mutual contact of the structures and the influence on heat dissipation can be avoided, foreign matters can be effectively separated, and the effects of anti-collision, shock absorption and the like can be achieved.

With continued reference to fig. 3, the axial lengths of the post-processor 100 and the primary protection cover 210 are relatively large, and in order to stably mount the primary protection cover 210, a plurality of first supports 162 are disposed on the surface of the post-processor 100, and the plurality of first supports 162 are disposed at intervals along the axial direction.

With continued reference to fig. 3, the surface of the post-processor 100 is also provided with a second mount 163, the second mount 163 being used to mount a functional module. In the illustrated embodiment, the second support 163 is also provided with a convex shape, and a screw hole is provided in the middle of the protrusion to facilitate the installation of the functional module. The functional module is arranged at intervals with the processing module through the second support 163, so that high temperature can be avoided, and use safety is ensured.

In one embodiment, the post-processor 100 includes a processing module and a functional module; the treatment module comprises a DOC module 111, a DPF module 112 and an SCR module 113, wherein the DOC module 111, the DPF module 112 and the SCR module 113 are sequentially arranged, and the waste gas to be treated can sequentially pass through the DOC module 111, the DPF module 112 and the SCR module 113; the functional module comprises: a differential pressure detection mechanism 120 for detecting a differential pressure within the DPF module 112; a temperature detection mechanism 130 for detecting temperatures within the DOC module 111 and the SCR module 113; urea injection mechanism 140 for injecting urea into SCR module 113; the nitrogen-oxygen detecting mechanism 150 is used for detecting the nitrogen oxide value in the gas passing through the SCR module 113.

Wherein the DOC module 111 is capable of converting carbon monoxide (CO) and Hydrocarbons (HC) in the exhaust gas to be free of carbon monoxide (HC) by an oxidation reactionHarmful water (H) ₂ 0) And carbon dioxide (CO) ₂ ). The DPF module 112 can be capable of capturing particulates in the exhaust gas through a filtering device (e.g., diffusion precipitation, inertial precipitation, or linear interception) to reduce the Particulate Matter (PM) content of the exhaust gas. The SCR module 113 may be configured to reduce nitrogen oxides (NOx) in the exhaust gas to N by injecting ammonia, urea, or other nitrogen-containing compounds into the exhaust gas containing NOx ₂ And water.

In this embodiment, the vehicle is operated and the exhaust gas produced is passed through a treatment module to effect purification of carbon monoxide, hydrocarbons, particulates and nitrogen oxides therein.

In the working process of the processing module, parameters such as pressure, temperature and the like need to be monitored, so that the reliability and stability of the purification process are ensured; in the SCR module 113, it is also necessary to confirm whether the urea is injected or not, the injection amount of the urea, and other operating conditions according to the actually measured parameters such as pressure and temperature, so as to ensure that the urea is converted into an appropriate amount of ammonia gas and can be completely reacted with nitrogen oxides in the exhaust gas; before the purified gas flows out of the post-processor 100, the nitrogen oxide value is further monitored, so that the purification effect of the waste gas is ensured; if the nitrogen-oxygen detecting means 150 detects that the purified gas still contains nitrogen oxides, the data may be fed back in reverse, and the amount of urea injected by the urea injecting means 140 may be increased or decreased by the controller.

Optionally, the aftertreatment device 100 further comprises a collar 161, the doc module 111 and the DPF module 112 being fastened by one collar 161, the DPF module 112 and the SCR module 113 being fastened by another collar 161.

Referring specifically to fig. 3, in the illustrated embodiment, the DOC module 111, the DPF module 112, and the SCR module 113 are all configured in a cylindrical shape, and the three modules are stacked from bottom to top; the upper end of the DOC module 111 is connected with the lower end of the DPF module 112, and the upper end of the DPF module 112 is connected with the lower end of the SCR module 113.

More specifically, the DOC module 111, the DPF module 112 and the SCR module 113 are provided with skirts at one end for connection with each other, and the clip 161 can clip the skirts of the adjacent two modules close to each other, thereby achieving a secure connection of the adjacent two modules.

In the embodiment shown in fig. 3, the clip 161 is open on one side and has a locking structure on the open side; opening the locking structure, pulling the clamp 161 open through the opening so that the clamp 161 buckles the skirt edges of two adjacent modules; after the clamp 161 buckles the skirt, the clamp 161 can hold the two modules by tightening the locking structure. The clamping hoop 161 is used for clamping the skirt, so that the joint of two adjacent modules is also sealed, and the tightness in the modules is ensured.

Optionally, the surfaces of the DOC module 111, the DPF module 112 and the SCR module 113 are provided with heat insulation layers.

Wherein, the heat insulation layer can be arranged by adopting high temperature resistant glass fiber cotton; the high-temperature resistant glass fiber cotton is prepared from uniform, slender and elastic glass fibers and a special high-temperature adhesive, and has the characteristics of light weight, durability, excellent heat preservation performance and the like; the heat-resistant temperature of the high-temperature-resistant glass fiber cotton is 650-850 ℃, so that the overall high-temperature resistance of the product can be greatly improved.

If desired, the surfaces of the DOC module 111, the DPF module 112 and the SCR module 113 may be provided with two or more layers of insulation.

In one embodiment, the differential pressure detection mechanism 120 includes: a differential pressure sensor 121; a first air duct 122 disposed near an air intake end of the DPF module 112 and communicating the DPF module 112 with the differential pressure sensor 121; the second air guide pipe 123 is disposed near the air outlet end of the DPF module 112 and communicates the DPF module 112 with the differential pressure sensor 121.

Referring specifically to fig. 3, in the illustrated embodiment, the DOC module 111, the DPF module 112, and the SCR module 113 are sequentially arranged from bottom to top; an air inlet is formed in one side of the DOC module 111, an air outlet is formed in the top of the SCR module 113, and waste gas to be purified enters the postprocessor 100 from the air inlet, and after sequentially passing through the DOC module 111, the DPF module 112 and the SCR module 113, the purified gas is discharged through the air outlet. Thus, in the illustrated embodiment, the inlet end of each module is the lower end of the module and the outlet end is the upper end of the module.

Referring to fig. 2 in combination, the differential pressure sensor 121 is disposed outside the SCR module 113 (mounted on a corresponding second support 163), and the first and second air ducts 122 and 123 are disposed below the differential pressure sensor 121. The first air guide pipe 122 is longer, extends to the lower side of the DPF module 112, and is close to the air inlet end of the DPF module 112; the second air guide pipe 123 is short, extends to the upper side of the DPF module 112, and is close to the air outlet end of the DPF module 112. Thus, the differential pressure sensor 121 can detect the differential pressure before and after the DPF module 112 when the exhaust gas flows through the DPF module 112, so as to confirm the exhaust gas circulation condition and ensure the normal operation of the aftertreatment device 100.

Optionally, the differential pressure detecting mechanism 120 further includes a rubber tube 124, and the first air duct 122 and the second air duct 123 are respectively communicated with the differential pressure sensor 121 through one rubber tube 124.

The material characteristic of the rubber tube 124 is favorable for connecting the air duct with the differential pressure sensor 121, and also has better sealing performance and is favorable for the accuracy of air pressure detection.

The rubber tube 124 can be prepared from methyl vinyl silicone rubber (VMQ), and at this time, the rubber tube 124 has a good temperature resistant range (-60 ℃ -250 ℃), so that the use safety is facilitated.

Optionally, the differential pressure detection mechanism 120 further includes a tube clamp 125, where the tube clamp 125 is capable of restricting the first and second air ducts 122, 123 from relative displacement, and is also capable of securing the first and second air ducts 122, 123 to the post-processor 100.

Referring to fig. 3, in the illustrated embodiment, the pipe clamp 125 is generally M-shaped, two legs of the pipe clamp 125 are used for connecting with the second support 163 on the post-processor 100, two side-by-side clamping grooves are arranged in the middle of the pipe clamp 125, one clamping groove is used for clamping the first air duct 122, and the other clamping groove is used for clamping the second air duct 123.

Optionally, two air pipe connectors 164 are disposed on the processing module, and the first air pipe 122 and the second air pipe 123 are respectively communicated with the DPF module 112 through one air pipe connector 164. The inner threads are arranged in the mounting channel of the air pipe connector 164, and the end parts of the first air guide pipe 122 and the second air guide pipe 123 are provided with outer threads; the ends of the first air duct 122 and the second air duct 123 are in threaded connection with the corresponding air duct connectors 164, and the connection is reliable due to the threaded characteristic, and the sealing performance of the connection position is good.

In one embodiment, the temperature detection mechanism 130 includes: a temperature sensor 131; a first probe 132 disposed near the air inlet end of the DOC module 111 and connected to the DOC module 111 and the temperature sensor 131; the second probe 133 is arranged near the air outlet end of the DOC module 111 and is connected with the DOC module 111 and the temperature sensor 131; the third probe 134 is disposed near the air inlet end of the SCR module 113 and connects the SCR module 113 and the temperature sensor 131.

Referring specifically to fig. 2 and 3, in the illustrated embodiment, the temperature sensor 131 is disposed outside the DOC module 111 (mounted on a corresponding second mount 163); the first probe 132, the second probe 133 and the third probe 134 are connected to the temperature sensor 131, respectively; the first probe 132 is arranged on one side of the DOC module 111 and is opposite to an air inlet arranged on the DOC module 111; the second probe 133 is disposed on the upper side of the DOC module 111; the third probe 134 is provided at the lower side of the SCR module 113.

With three probes, the temperature detection mechanism 130 is able to monitor the temperature of the exhaust gas at various stages in the aftertreatment device 100 in order to confirm whether the purging operation is operating properly.

Optionally, the post-processor 100 is provided with three probe connectors 165, and the first probe 132, the second probe 133 and the third probe 134 are respectively connected to corresponding processing modules through one probe connector 165. The mounting channel of the probe connector 165 is internally provided with internal threads, and the tail parts of the three probes are provided with external threads; after the probe is inserted into the processing module, the tail part can be in threaded connection with the probe connector 165, and the connection is reliable due to the threaded characteristic, so that the sealing performance of the connection part is good.

Optionally, the post-processor 100 further includes thermal insulation cotton disposed on the differential pressure detection mechanism 120 and/or the nitrogen oxide detection mechanism 150 for preventing ablation.

For example, the nitrogen-oxygen detecting mechanism 150 includes a nitrogen-oxygen sensor and a probe, and the probe is disposed near the outlet end of the SCR module 113 and can cooperate with the nitrogen-oxygen sensor to monitor the nitrogen oxide content in the gas purified by the SCR module 113. As the probe is a precise monitoring tool, the probe can be wrapped with heat insulation cotton, which is beneficial to the safety and service life of the probe. Meanwhile, the control box of the nitrogen-oxygen sensor can be provided with heat insulation cotton, the nitrogen-oxygen sensor and the post-processor 100 are separated by the heat insulation cotton, so that the ablation of the nitrogen-oxygen sensor can be effectively prevented, and the use safety and the service life of the nitrogen-oxygen sensor are facilitated.

For another example, the differential pressure detection mechanism 120 includes a differential pressure sensor 121, and heat insulation cotton is arranged on a control box of the differential pressure sensor 121, and the differential pressure sensor 121 and the post-processor 100 are separated by the heat insulation cotton, so that ablation of the differential pressure sensor 121 can be effectively prevented, and the use safety and the service life of the differential pressure sensor 121 are facilitated.

Wherein, the heat insulation cotton can be prepared from high temperature resistant glass fiber cotton.

When the functional module adopts the structures such as a sensor and a probe, the wiring such as an external wiring cable is necessary to meet the requirements of power supply and information transmission, and the wiring can be integrated into a wiring harness for regular wiring. Optionally, the post-processor 100 further includes aluminum foil tape for wrapping the harness of the functional module to prevent ablation.

The aluminum foil tape wrapped on the periphery of the wire harness can be prepared from a high-temperature-resistant material, the heat-resistant temperature of the high-temperature-resistant aluminum foil tape is 200 ℃, and the high-temperature-resistant aluminum foil tape is prepared from an excellent pressure-sensitive adhesive and has the effects of good viscosity, strong adhesive force, aging resistance and the like, and the overall high-temperature resistance of the product can be greatly improved, so that the use safety and the service life of the wire harness are ensured.

In one embodiment, urea injection mechanism 140 includes: the nozzle is communicated with the SCR module 113 and is used for injecting urea into the SCR module 113; a urea runner pipe communicated with the nozzle and used for supplying urea to the nozzle; and the cooling water pipe is used for circulating cooling water, and the cooling water can exchange heat with urea in the urea flow pipe through the cooling water pipe.

The urea flow pipe comprises a urea inlet pipe and a urea return pipe, urea solution is supplied to the nozzle through the urea inlet pipe, the nozzle can spray urea into the SCR module 113, the urea is atomized with waste gas in the SCR module 113, ammonia gas is provided for the catalyst carrier, and the ammonia gas reacts with nitrogen oxides in the waste gas under the action of the catalyst carrier; excess urea is drained through the urea return line, thereby achieving continued, stable operation of the urea injection mechanism 140.

The cooling water pipe can be tightly attached to the urea runner pipe or can be intertwined with the urea runner pipe; the cooling water pipe is filled with flowing cooling liquid (water at normal temperature or low temperature and other solutions), so that the temperature of the urea solution in the urea flow pipe can be stabilized through heat exchange, the urea solution can be ensured to enter the SCR module 113 at a proper temperature, and ammonia gas is generated to realize oxidation reduction reaction with nitrogen oxides.

In addition, the cooling water pipe is made to be close to other processing modules and functional modules in the post-processor 100, and also facilitates heat dissipation and temperature reduction of other modules.

Optionally, a nozzle mount 166 is provided on the SCR module 113, and the nozzle can be inserted into the SCR module 113 through the nozzle mount 166.

In one embodiment, referring to fig. 1 to 3, the primary protection cover 210 includes a cover disposed outside the DOC module 111, the DPF module 112, and the SCR module 113; the secondary protective cover 220 is covered outside the differential pressure detection mechanism 120, the temperature detection mechanism 130, the urea injection mechanism 140 and the nitrogen-oxygen detection mechanism 150; the urea injection mechanism 140 comprises a nozzle, a urea runner pipe and a cooling water pipe, and the three-stage protection cover 230 is covered outside the urea runner pipe and the cooling water pipe; referring to fig. 5 in combination, the bottom of the tertiary shield 230 is open, and the urea runner pipe, cooling water pipe, and some cables requiring an external power source or controller extend to the outside through the bottom opening of the tertiary shield 230.

In the illustrated embodiment, the three protective covers are arranged layer by layer, can independently accommodate part of the structure and can be independently disassembled; the size of the three protective covers is suitable for the structure of the needed accommodation, is reasonable in layout and does not occupy too much space in the vehicle.

Optionally, the secondary protection cover 220 is covered outside the functional module, and a heat-resistant adhesive tape 167 is arranged in the secondary protection cover 220, and the heat-resistant adhesive tape 167 is used for preventing the wire harness of the functional module from being scratched.

Referring specifically to FIG. 4, in the illustrated embodiment, the secondary shield 220 is generally elongated; the secondary protection cover 220 includes a cover body 221 and two covers 222, the cover body 221 is substantially U-shaped, the covers 222 are covered on the end of the cover body 221, and the second mounting opening 220a is provided on the cover body 221. The inner walls of the two covers 222 are respectively provided with a heat-resistant adhesive tape 167, part of the heat-resistant adhesive tape 167 is arranged by being attached to the edge of the cover 222, and the other part of the cover 222 is arranged in a U shape; the heat-resistant adhesive tape 167 can be prepared from methyl vinyl silicone rubber (VMQ), and the temperature resistance range of the heat-resistant adhesive tape 167 prepared from the material is-60-250 ℃; the heat-resistant adhesive tape 167 has a certain elasticity, and can protect the functional module and the secondary protective cover 220 well without wearing the functional module even if contacting the functional module.

Optionally, an auxiliary bracket 168 is arranged outside the secondary protective cover 220, and the auxiliary bracket 168 is used for facilitating the installation of the urea runner pipe and the cooling water pipe.

Optionally, a heat resistant layer is provided on the secondary support 168.

Referring specifically to fig. 2 and 4, in the illustrated embodiment, three auxiliary brackets 168 are provided outside the cover body 221 of the secondary protective cover 220, and the auxiliary brackets 168 are shaped like a handle and are provided around the second mounting opening 220 a. External structures such as wire harnesses and pipelines for connecting the functional modules can be arranged in the auxiliary bracket 168 in a penetrating mode, and the positions of the external structures can be controlled through the auxiliary bracket 168, so that the external structures are prevented from interfering with each other or other structures. The external connection structure sequentially passes through all the auxiliary brackets 168, and the auxiliary brackets 168 at different positions can also guide the external connection structure to move so that the external connection structure can accurately connect the functional module and the external mechanism.

Referring to fig. 1 in combination, after the tertiary shield 230 is installed, a portion of the auxiliary frame 168 is covered in the tertiary shield 230, the bottom of the tertiary shield 230 is opened, and another portion of the auxiliary frame 168 is provided under the tertiary shield 230. The circumscribing structure can be constrained within the auxiliary bracket 168 and extend outward in a predetermined direction.

Optionally, the primary shield 210 includes: the first cover 211 and the second cover 212, the first cover 211 and the second cover 212 can be matched with each other from two radial sides to cover the post-processor 100, and the first cover 211 and the second cover 212 are detachably connected; a cover top 213 for sleeving and fixing the top ends of the first cover 211 and the second cover 212; wherein, the first cover 211 and the second cover 212 are provided with heat dissipation holes 200a; the first mounting opening 210a is provided in the second housing 212.

The first-stage protection cover 210 is arranged in a split manner, so that the protection cover of the post-processor 100 can be more conveniently assembled and disassembled.

In the embodiment shown in fig. 1 to 3, the post-processor 100 includes the DOC module 111, the DPF module 112 and the SCR module 113 which are axially arranged, and at this time, the entire post-processor 100 has a large height, which also results in the primary protection cover 210 having a large height, and if the primary protection cover 210 is provided in a one-piece tubular structure, the primary protection cover 210 is necessarily difficult to be assembled and disassembled. The primary protection cover 210 is provided with two flaps, and the primary protection cover 210 can be conveniently assembled and disassembled from the two lateral sides.

Referring to fig. 2, the first cover 211 and the second cover 212 are each provided in a semicircular arc shape, both circumferential sides of the first cover 211 and the second cover 212 are provided with extended edges, the extended edges of the first cover 211 are provided with arc grooves for avoiding bolts, and the extended edges of the second cover 212 are provided with waist-shaped holes for avoiding bolts. The processing module is provided with a first support 162, and a screw hole is formed in the first support 162; when the first cover body 211 and the second cover body 212 are installed, the extended edge of the first cover body 211 is attached to the extended edge of the second cover body 212, the first cover body 211 and the second cover body 212 wrap the processing module in, the arc grooves and the waist-shaped holes are in one-to-one correspondence with the screw holes, bolts are screwed in from the arc grooves, pass through the waist-shaped holes and are in fastening connection with the screw holes, and then the first-stage protection cover 210 and the post processor 100 can be fixed.

With continued reference to fig. 2, a large arc slot for avoiding the air inlet is provided on one side of the first cover 211.

With continued reference to fig. 2, a plurality of rivet nuts are provided on the second cover 212 and around the first mounting opening 210a; the secondary shield 220 can be screwed to the second shield 212 by means of these blind rivet nuts.

Referring to fig. 4 in combination, a plurality of rivet nuts are also provided around the second mounting opening 220a of the secondary shield 220, and the tertiary shield 230 can be screwed with the secondary shield 220 through the rivet nuts.

With continued reference to fig. 2, extended edges are also provided at the top of the first cover 211 and the second cover 212, and after the first cover 211 and the second cover 212 are connected, the cover top 213 can be sleeved outside the extended edges, so as to clamp the top of the first cover 211 and the second cover 212.

Specifically, arc grooves for avoiding bolts are formed in the top extension edges of the first cover body 211 and the second cover body 212, mounting holes for avoiding bolts are formed in the peripheral surface of the cover top 213 for sleeving the extension edges, a circle of first support 162 is arranged at the top of the post-processor 100, and screw holes are formed in each first support 162. The cover top 213 is sleeved outside the top extension edges of the first cover 211 and the second cover 212, so that

The mounting holes of the cover top 213 are aligned with the arc grooves of the two cover top and the screw holes on the rear first support 162, and the first-stage protection cover 210 and the post-processor 100 can be further fastened by bolting.

The axial and radial positions of the primary protection cover 210 are fixedly connected with the post-processor 100, so that the relative positions of the primary protection cover and the post-processor 100 are more stable, and the protection effect is better.

Optionally, the top of the cap 213 is tapered, the angle of the cap 213 being 130 °.

The angular disposition of the shroud top 213 does not affect the containment and protection of the post-processor 100 by the shroud top 213, but also can form an incline to avoid foreign matter accumulation.

Optionally, a plurality of avoidance holes are formed on the cover top 213, so that the gas outlet holes of the processing module penetrate out, and the structural members of the functional module are connected with the SCR module 113.

Optionally, a lifting lug is provided on the cover top 213.

Referring specifically to fig. 1, in the illustrated embodiment, a lifting lug is disposed on both the left and right sides of the cover top 213, and a through hole is disposed on the lifting lug, so as to facilitate lifting the whole post-treatment device.

Optionally, the primary protection cover 210, the secondary protection cover 220 and/or the tertiary protection cover 230 are provided with a plurality of rows of heat dissipation holes 200a; any two rows of adjacent heat dissipation holes 200a are arranged in a staggered manner; any radiating hole 200a is a round hole, and the aperture of the radiating hole 200a is 3mm; the center distance between any two rows of adjacent heat dissipation holes 200a is 6mm; the center-to-center distance between two adjacent heat dissipation holes 200a in any one row is 3.5mm.

The heat dissipation holes 200a are round holes with the aperture of 3mm, so that the whole heat dissipation of the post-treatment device is facilitated, the ablation of the functional module is avoided, and foreign matters can be effectively prevented from entering the protective cover; meanwhile, the heat dissipation holes 200a are arranged at intervals and in a staggered mode, and the integral strength of the protective cover can be well guaranteed.

In one embodiment, exhaust gas enters the DOC module 111 from an air inlet at the lower end side of the post-processor 100 and flows sequentially to the DOC module 111, the DPF module 112 and the SCR module 113; the differential pressure sensor 121 detects a differential pressure value before and after the DPF module 112; the temperature sensor 131 detects temperature values before and after the DOC module 111 and before the SCR module 113; when the internal temperature of the SCR module 113 reaches 200 ℃, the nozzle discharges the columnar urea aqueous solution to the inside of the mixer of the SCR module 113 at a fixed pressure, the exhaust gas and urea are rapidly atomized through the mixer and ammonia gas is provided for the subsequent catalyst carrier, the ammonia gas reacts with nitrogen oxides in the exhaust gas under the action of the catalyst carrier, and the nitrogen oxide value is detected through the nitrogen oxide detection mechanism 150, so that the purpose of eliminating harmful emissions of the diesel engine is achieved.

The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not thereby to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (10)

1. A protective aftertreatment device, comprising:

-a post-processor (100) for purifying the exhaust gases to be treated;

the first-stage protection cover (210) is detachably covered outside the post-processor (100), and a first mounting opening (210 a) is formed in the first-stage protection cover (210);

the second-level protective cover (220) is detachably arranged on the first mounting opening (210 a), and a second mounting opening (220 a) is formed in the second-level protective cover (220);

the third-level protective cover (230) is detachably arranged on the second mounting port (220 a);

wherein, the primary protection cover (210), the secondary protection cover (220) and the tertiary protection cover (230) are all provided with heat dissipation holes (200 a).

2. The guard post-processing device according to claim 1, characterized in that the post-processor (100) comprises a processing module and a functional module;

the treatment module comprises a DOC module (111), a DPF module (112) and an SCR module (113), wherein the DOC module (111), the DPF module (112) and the SCR module (113) are sequentially arranged, and the waste gas to be treated can sequentially pass through the DOC module (111), the DPF module (112) and the SCR module (113);

the functional module includes:

a differential pressure detection mechanism (120) for detecting a differential pressure within the DPF module (112);

a temperature detection mechanism (130) for detecting temperatures within the DOC module (111) and the SCR module (113);

urea injection means (140) for injecting urea into the SCR module (113);

and a nitrogen-oxygen detection means (150) for detecting the nitrogen oxide value in the gas passing through the SCR module (113).

3. The guard type aftertreatment device according to claim 2, characterized in that the aftertreatment device (100) further comprises a clamp (161), the DOC module (111) and the DPF module (112) being fastened by one of the clamps (161), the DPF module (112) and the SCR module (113) being fastened by the other clamp (161);

and/or the surfaces of the DOC module (111), the DPF module (112) and the SCR module (113) are provided with heat insulation layers.

4. The guard type aftertreatment device according to claim 2, wherein the differential pressure detection mechanism (120) includes:

a differential pressure sensor (121);

a first air duct (122) which is arranged near the air inlet end of the DPF module (112) and is communicated with the DPF module (112) and the differential pressure sensor (121);

and a second air guide pipe (123) which is arranged close to the air outlet end of the DPF module (112) and is communicated with the DPF module (112) and the differential pressure sensor (121).

5. The guard post-treatment device according to claim 2, wherein the temperature detection mechanism (130) comprises:

a temperature sensor (131);

a first probe (132) disposed near an air inlet end of the DOC module (111) and connecting the DOC module (111) and the temperature sensor (131);

a second probe (133) disposed near the outlet end of the DOC module (111) and connecting the DOC module (111) and the temperature sensor (131);

and a third probe (134) which is arranged near the air inlet end of the SCR module (113) and is connected with the SCR module (113) and the temperature sensor (131).

6. The guard type aftertreatment device of claim 2, wherein the urea injection mechanism (140) comprises:

a nozzle communicated with the SCR module (113) and used for injecting urea into the SCR module (113);

a urea runner pipe communicating with the nozzle for supplying urea to the nozzle;

and the cooling water pipe is used for circulating cooling water, and the cooling water can exchange heat with urea in the urea runner pipe through the cooling water pipe.

7. The guard post-treatment device according to any one of claims 2-6, wherein the post-treatment device (100) further comprises heat insulating cotton provided on the pressure difference detection means (120) and/or the nitrogen-oxygen detection means (150) for preventing an ablation situation;

and/or the post-processor (100) further comprises an aluminum foil tape, wherein the aluminum foil tape is used for wrapping the wire harness of the functional module and preventing the ablation condition;

and/or, the secondary protective cover (220) is covered outside the functional module, a heat-resistant adhesive tape (167) is arranged in the secondary protective cover (220), and the heat-resistant adhesive tape (167) is used for preventing the wire harness of the functional module from being scratched;

and/or the secondary protective cover (220) is provided with an auxiliary bracket (168), and the auxiliary bracket (168) is used for facilitating the installation of the urea runner pipe and the cooling water pipe.

8. The guard post-treatment device according to claim 1, wherein the primary guard (210) comprises:

a first cover (211) and a second cover (212), wherein the first cover (211) and the second cover (212) can be matched with each other from two radial sides to cover the post-processor (100), and the first cover (211) and the second cover (212) are detachably connected;

a cover top (213) for sleeving and fixing the top ends of the first cover body (211) and the second cover body (212);

wherein the first cover body (211) and the second cover body (212) are respectively provided with the heat dissipation holes (200 a);

the first mounting opening (210 a) is arranged on the second cover body (212).

9. The guard post-treatment device according to claim 8, characterized in that the top of the roof (213) is arranged in a cone shape, the angle of the roof (213) being 130 °;

and/or the cover top (213) is provided with a lifting lug.

10. The protective aftertreatment device of claim 1, wherein a plurality of rows of the heat dissipation holes (200 a) are provided on the primary protective cover (210), the secondary protective cover (220), and/or the tertiary protective cover (230);

any two rows of adjacent radiating holes (200 a) are arranged in a staggered manner;

any radiating hole (200 a) is a round hole, and the aperture of the radiating hole (200 a) is 3mm;

the center distance between any two rows of adjacent radiating holes (200 a) is 6mm;

the center distance between two adjacent heat dissipation holes (200 a) in any row is 3.5mm.