CN216866819U - Protection device for be used for diesel engine tail gas aftertreatment device for non-road - Google Patents
Protection device for be used for diesel engine tail gas aftertreatment device for non-road Download PDFInfo
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- CN216866819U CN216866819U CN202220213029.8U CN202220213029U CN216866819U CN 216866819 U CN216866819 U CN 216866819U CN 202220213029 U CN202220213029 U CN 202220213029U CN 216866819 U CN216866819 U CN 216866819U
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- protection casing
- catalytic unit
- scr catalytic
- treatment device
- pencil
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Abstract
The utility model provides a protective device for a non-road diesel engine tail gas aftertreatment device, which is reasonable in structure and has better heat dissipation performance while protecting a sensor and a wire harness.
Description
Technical Field
The utility model relates to the technical field of tail gas after-treatment devices, in particular to a protection device for a non-road diesel engine tail gas after-treatment device.
Background
With the coming of the four-stage emission technical scheme of the non-road diesel engine, the development of the post-treatment device for the diesel engine, which meets the requirements of corresponding regulations, is increasingly urgent, and at present, the post-treatment device for the heavy diesel engine mainly comprises three main components: DOC catalytic unit, DPF catalytic unit and SCR catalytic unit. The integrated development of the post-processing device needs to install sensors such as a temperature sensor, a nitrogen oxygen sensor and the like and a wire harness, and the integrated wire harness support is designed and developed according to the boundary condition of the whole vehicle, the installation position of the sensors and the position of the wire harness.
Fig. 1 shows an aftertreatment device for a diesel engine, which adopts a design that a DOC catalytic unit 100, a DPF catalytic unit 200 and an SCR catalytic unit 300 are separated, wherein the SCR catalytic unit 300 adopts a vertically arranged design, and the aftertreatment device is suitable for a non-road diesel engine, and the working condition environment of the non-road diesel engine is often severe, and a sensor and a wire harness installed outside the aftertreatment device need to be protected, so that a protection device needs to be designed.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems, the utility model provides a protective device for a non-road diesel engine tail gas aftertreatment device, which is reasonable in structure, protects a sensor and a wire harness and has better heat dissipation performance.
The technical scheme is as follows: the utility model provides a protector that is used for diesel engine tail gas aftertreatment device for non-road, its characterized in that, including fixing the protection casing in the SCR catalytic unit outside, the protection casing can connect including surrounding temperature sensor, nitrogen oxygen sensor, pencil and the main line bundle in the SCR catalytic unit outside, a plurality of louvres of having arranged on the protection casing still include the top apron, the top apron closing cap is in the upper end of protection casing, correspond on the top apron the pencil is equipped with the pencil and perforates, be equipped with flexible shrouding on the pencil is perforated, be equipped with the pencil via hole that can supply the pencil to pass on the flexible shrouding.
Furthermore, a groove is formed in the periphery of the flexible sealing plate in a surrounding mode, and the flexible sealing plate is installed on the wire harness through hole in a matched mode through the groove and the wire harness through hole.
Further, the wire harness is in interference fit with the wire harness through hole, and the groove is in interference fit with the wire harness through hole.
Further, the bottom edge of the flexible sealing plate at the lower end of the groove is smaller than the top edge at the upper end of the groove.
Furthermore, the protection casing is fixed in the outside of SCR catalytic unit through the installing support, the installing support with SCR catalytic unit's surface welded connection.
Further, the installing support includes the protection casing fixed plate and is located protection casing fixed plate both sides, with SCR catalytic unit's surface complex welded connection portion, be equipped with the installation locating hole on the protection casing fixed plate, correspond on the protection casing the installation locating hole is equipped with the mounting hole, and fixing bolt passes the mounting hole and the installation locating hole will the protection casing is fixed SCR catalytic unit's the outside.
Furthermore, the mounting positioning hole is a waist-shaped hole.
Further, the protection casing fixed plate is connected respectively in the upper end of welded connection portion for leave the space that can supply the bolt to pass between the protection casing fixed plate and the surface of SCR catalytic unit.
Furthermore, the outside of SCR catalytic unit still welded connection has a support holder, support holder pass through the bolt with the protection casing is together fixed, support holder fixes the back support of protection casing the protection casing.
Furthermore, the lower extreme of protection casing is provided with urea nozzle cover, urea nozzle cover extends to the outside of protection casing and shelters from the top at urea nozzle seat.
The protection device provided by the utility model is particularly suitable for a vertically-arranged diesel engine tail gas after-treatment device for non-roads, the protection cover is arranged on the outer side of the SCR catalytic unit, the protection cover wraps the nitrogen-oxygen sensor, the temperature sensor and the wire harness, and can protect a main wire harness joint, the top end of the protection cover is also provided with the top cover plate, and the top of the top cover plate is plugged, so that the most frequently encountered situation that rainwater drips can be avoided, the nitrogen-oxygen sensor, the temperature sensor and the wire harness are integrated in the protection cover, the protection safety is realized, the collision damage is prevented, the back of the protection cover is also provided with the support bracket, the structural strength of the protection cover can be improved, and the protection capability is further improved; in addition, the protective cover is also provided with heat dissipation holes, so that the protective cover can have better heat dissipation performance while protecting, meanwhile, the protective cover is fixed on the outer side of the SCR catalytic unit through the mounting support, a certain gap is reserved between the protective cover and the shell of the SCR catalytic unit due to the arrangement of the mounting support, the effect of further improving the heat dissipation effect can be achieved, and meanwhile, the protective device provided by the utility model does not influence the heat insulation performance of the original heat insulation shell body of the SCR catalytic unit.
Drawings
FIG. 1 is a schematic view of an exhaust after-treatment device for a non-road diesel engine according to the present invention;
FIG. 2 is a schematic illustration of a mounting bracket and a support bracket of the guard in an embodiment mounted on an SCR catalytic unit;
FIG. 3 is a schematic view of an embodiment of a guard mounted on an exhaust after-treatment device for a non-road diesel engine;
FIG. 4 is a schematic view of a flexible sealing plate according to an embodiment;
fig. 5 is a schematic view of a mounting bracket according to an embodiment.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention are described in further detail below. In the description herein, references to the terms "embodiment" or the like are intended to mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
The drawings provided in this embodiment are only for schematically illustrating the basic concept of the present invention, and the components related to the present invention are only shown in the drawings and not drawn according to the number, shape and size of the components in actual implementation, and the type, number and proportion of each component in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
Referring to fig. 2, 3, 4 and 5, the protecting device for the exhaust gas after-treatment device of the off-road diesel engine of the present invention comprises a protecting cover 1 fixed outside an SCR catalytic unit 300, the protecting cover 1 having a bulged casing,
protection casing 1 can be with temperature sensor 301 in the SCR catalytic unit 300 outside, nitrogen oxygen sensor 302, including pencil 303 and main pencil joint 304 surround, a plurality of louvres 2 of having arranged on the protection casing 1, protector still includes top apron 3, 3 closing caps of top apron are in the upper end of protection casing, it is equipped with pencil perforation 4 to correspond the pencil on the top apron 3, be equipped with flexible shrouding 5 on the pencil perforation 4, be equipped with the pencil via hole 51 that can supply pencil 303 to pass on the flexible shrouding 5, protector can be arranged to easy to assemble to such design, top apron 3 can pass through the bolt fastening on the support 9 of SCR catalytic unit 300.
In one embodiment of the present invention, the flexible sealing plate 5 is made of soft plastic, and is made of rubber or the like, and a groove 52 is provided around the periphery of the flexible sealing plate, and the flexible sealing plate is fitted to the wire harness insertion hole 4 through the groove 52.
In one embodiment of the utility model, in order to improve the waterproof performance, the wire harness 303 is in interference fit with the wire harness through hole 51, and the groove 52 is in interference fit with the wire harness through hole 4.
In addition, still set up flexible shrouding 5 and be located the size of bottom edge 53 of recess lower extreme and be less than the top edge 54 that is located the recess upper end, such design can make things convenient for flexible shrouding 5's installation, makes the top edge 54 that is located the perforation 4 upper end of pencil to play better water-proof effects simultaneously.
In the embodiment of the utility model, the protective cover is arranged on the outer side of the SCR catalytic unit, the nitrogen-oxygen sensor, the temperature sensor, the wiring harness and the like are wrapped in the protective cover, the joint of the main wiring harness can be protected, the top cover plate is further arranged at the upper end of the protective cover, and the top of the top cover plate is plugged, so that the most frequently encountered rainwater dripping condition can be avoided.
In one embodiment of the present invention, the protection cover 1 is fixed to the outside of the SCR catalyst unit 300 by a mounting bracket 6, and the mounting bracket 6 is welded to the outer surface of the SCR catalyst unit 300.
Particularly, installing support 6 includes protection casing fixed plate 61 and is located protection casing fixed plate 61 both sides, with SCR catalytic unit's surface complex welded connection portion 62, be equipped with installation locating hole 63 on the protection casing fixed plate 61, it is equipped with the mounting hole to correspond installation locating hole 63 on protection casing 1, fixing bolt 7 passes mounting hole and installation locating hole 63 and fixes protection casing 1 in SCR catalytic unit's the outside, in an embodiment, still be waist type hole with installation locating hole 63, the installation of protection casing can be made things convenient for in such design, reduce the installation degree of difficulty.
In an embodiment of the present invention, the protective cover fixing plates 61 are respectively connected to the upper ends of the welding connection portions 62, so that a gap through which a bolt can pass is left between the protective cover fixing plates 61 and the outer surface of the SCR catalytic unit 62, and the installation of the mounting bracket makes a certain gap between the protective cover and the casing of the SCR catalytic unit, which can further improve the heat dissipation effect, and in addition, a nut is welded to the back of the installation positioning hole 63, which facilitates the bolt to be fixed.
In an embodiment of the utility model, the outer side of the SCR catalytic unit is further welded with a support bracket 7, the support bracket 7 is fixed with the protective cover 1 through a bolt, the support bracket 7 is fixed on the back of the protective cover 1 to support the protective cover 1, and the structural strength of the protective cover can be improved and the protective capability can be further improved through the design of the support bracket
In one embodiment of the utility model, the lower end of the shield is provided with a urea nozzle cover 8, and the urea nozzle cover 8 extends to the outside of the shield to cover above the urea nozzle holder 305, so as to protect the wiring harness patch circuit on the urea nozzle.
The protection device provided in the embodiment of the utility model is particularly used for protecting an SCR catalytic unit of a vertically-arranged non-road diesel engine tail gas post-treatment device, can protect components such as a nitrogen-oxygen sensor, a temperature sensor, a wire harness, a main wire harness connector and the like outside the SCR catalytic unit, can prevent a more expensive sensor from being collided, can reduce the risk of short circuit when meeting water, plays the roles of protection, water prevention and heat dissipation, does not influence the heat insulation performance of the original heat insulation outer shell of the SCR catalytic unit, meets the emission requirement, is easy to produce, has low cost and is suitable for non-road machine types such as loaders.
Furthermore, it should be understood that although the specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it will be understood by those skilled in the art that the specification as a whole and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the utility model and should not be construed in any way as limiting the scope of the utility model. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive step, and these embodiments will fall within the scope of the present invention.
Claims (10)
1. The utility model provides a protector that is used for diesel engine tail gas aftertreatment device for non-road which characterized in that: including fixing the protection casing in the SCR catalytic unit outside, the protection casing can connect including surrounding with temperature sensor, nitrogen oxygen sensor, pencil and the main pencil in the SCR catalytic unit outside, a plurality of louvres of having arranged on the protection casing still include the top apron, the top apron closing cap is in the upper end of protection casing, correspond on the top apron the pencil is equipped with the pencil and perforates, be equipped with flexible shrouding on the pencil is perforated, be equipped with the pencil via hole that can supply the pencil to pass on the flexible shrouding.
2. The guard for an off-road diesel exhaust after-treatment device according to claim 1, wherein: encircle the periphery of flexible shrouding is equipped with the recess, flexible shrouding passes through the recess with the wiring harness is perforated to be installed in the cooperation wiring harness is perforated last.
3. The protective device for the off-road diesel exhaust after-treatment device according to claim 2, wherein: the wire harness is in interference fit with the wire harness through hole, and the groove is in interference fit with the wire harness through hole.
4. The protective device for the off-road diesel exhaust after-treatment device according to claim 2, wherein: the flexible sealing plate is positioned at the bottom edge of the lower end of the groove and is smaller than the top edge of the upper end of the groove in size.
5. The guard for an off-road diesel exhaust after-treatment device according to claim 1, wherein: the protection casing passes through the installing support to be fixed SCR catalytic unit's the outside, the installing support with SCR catalytic unit's surface welded connection.
6. The guard for an off-road diesel exhaust after-treatment device according to claim 5, wherein: the installing support includes the protection casing fixed plate and is located protection casing fixed plate both sides, with SCR catalytic unit's surface complex welded connection portion, be equipped with the installation locating hole on the protection casing fixed plate, correspond on the protection casing the installation locating hole is equipped with the mounting hole, and fixing bolt passes the mounting hole and the installation locating hole will the protection casing is fixed SCR catalytic unit's the outside.
7. The guard for an off-road diesel exhaust after-treatment device according to claim 6, wherein: the mounting positioning hole is a waist-shaped hole.
8. The guard for an off-road diesel exhaust after-treatment device according to claim 6, wherein: the protection casing fixed plate is connected respectively in the upper end of welded connection portion for leave the space that can supply the bolt to pass between the protection casing fixed plate and SCR catalytic unit's the surface.
9. The guard for an off-road diesel exhaust after-treatment device according to claim 1, wherein: the outside of SCR catalytic unit still welded connection has a support holder, support holder pass through the bolt with the protection casing is fixed together, support holder fixes the back support of protection casing the protection casing.
10. The guard for an off-road diesel exhaust after-treatment device according to claim 1, wherein: the lower extreme of protection casing is provided with urea nozzle cover, urea nozzle cover extends to the outside of protection casing and shelters from the top at urea nozzle seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220213029.8U CN216866819U (en) | 2022-01-26 | 2022-01-26 | Protection device for be used for diesel engine tail gas aftertreatment device for non-road |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220213029.8U CN216866819U (en) | 2022-01-26 | 2022-01-26 | Protection device for be used for diesel engine tail gas aftertreatment device for non-road |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216866819U true CN216866819U (en) | 2022-07-01 |
Family
ID=82153532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220213029.8U Active CN216866819U (en) | 2022-01-26 | 2022-01-26 | Protection device for be used for diesel engine tail gas aftertreatment device for non-road |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216866819U (en) |
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2022
- 2022-01-26 CN CN202220213029.8U patent/CN216866819U/en active Active
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