Post-treatment urea nozzle protection structure

Abstract

The utility model discloses a post-treatment urea nozzle protection structure which comprises a left protection plate and a right protection plate which are in butt joint with each other, and the left protection plate and the right protection plate which are in butt joint are tightly attached to the outer wall face of a urea nozzle. The left protection plate and the right protection plate are mounted on the outer surface of the post-treatment outer shell through bolts, and the mounted left protection plate and right protection plate protrude out of the outer surface of the post-treatment outer shell; the urea nozzle is clamped and installed through the left protection plate and the right protection plate, and compared with an existing protection structure, crops can be effectively prevented from being accumulated at the urea nozzle, and the risk of fire catching is avoided; in addition, the protection plate is composed of the cover plate heat insulation cotton and the cover plate, the cover plate heat insulation cotton can play a good heat insulation role, and the temperature of the protection plate is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of urea nozzle installation, and particularly relates to a protection structure for a post-treatment urea nozzle. Background Technique

[0002] The statements herein only provide background techniques related to the utility model and do not necessarily constitute prior art. The working principle of the post-treatment system is as follows: The aqueous urea solution is sprayed into the post-treatment in a mist form. The urea droplets undergo hydrolysis and pyrolysis reactions under the action of high-temperature exhaust gas to generate the required reducing agent ammonia (NH3). Ammonia (NH3) selectively reduces nitrogen oxides (NOx) to nitrogen gas (N2) under the action of a catalyst, reducing the main harmful component nitrogen oxides in the engine exhaust to nitrogen gas and water. The aqueous urea solution is sprayed into a mist form through the urea nozzle. Since the open area between the mounting base of the urea nozzle and the outer heat insulation cover increases the risk of crop accumulation and fire, it causes significant economic losses and safety accidents.

[0003] To solve the above problems, the existing protection structure of the urea nozzle is as follows Figures 1 to 6 As shown, first, the urea nozzle seat 2 is welded to the urea nozzle seat housing 1. Appropriate-sized holes are opened on the inner housing 3 and the outer housing 4 of the post-treatment to avoid installation interference of the urea nozzle in the later stage. Then, the bowl-shaped plug 5 is welded to the outer housing 4 of the post-treatment. A urea nozzle installation hole is opened at the bottom of the bowl-shaped plug. The urea nozzle 6 passes through the urea nozzle installation hole at the bottom of the bowl-shaped plug and is locked with the urea nozzle seat 2 through bolts. After the aqueous solution sprayed by the urea nozzle is fully mixed with the exhaust gas, it flows through the catalyst 7 to undergo a chemical reaction to reduce NO X in the exhaust gas to N2. In the above urea nozzle installation structure, there is a concave structure between the bowl-shaped plug and the urea nozzle. During the actual operation of agricultural machinery, this concave pit is prone to crop accumulation. At the same time, the bowl-shaped plug is not heat-insulated, and there is still a risk of fire. In addition, the bowl-shaped plug and the outer housing of the post-treatment are connected by welding, which causes inconvenience in disassembly when the urea nozzle is repaired. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a protection structure for a post-treatment urea nozzle, which can effectively prevent crop accumulation at the urea nozzle and avoid the risk of fire.

[0005] To achieve the above purpose, the utility model is realized by the following technical solutions:

[0006] In a first aspect, an embodiment of the present utility model provides a protection structure for a post-treatment urea nozzle, which includes a left protection plate and a right protection plate that are butt-jointed. After butt-jointing, the left protection plate and the right protection plate are closely attached to the outer wall surface of the urea nozzle; the left protection plate and the right protection plate are installed on the outer surface of the post-treatment housing through bolts, and after installation, the left protection plate and the right protection plate protrude from the outer surface of the post-treatment housing.

[0007] As a further technical solution, the left protection plate includes a left cover plate and a left cover plate heat insulation cotton. The left cover plate heat insulation cotton is located below the left cover plate, and the left cover plate and the left cover plate heat insulation cotton are riveted into a whole through a plurality of rivets.

[0008] As a further technical solution, the contour of the fitting position of the left cover plate and the left cover plate heat insulation cotton with the urea nozzle matches the outer contour of the urea nozzle.

[0009] As a further technical solution, the position where the left cover plate heat insulation cotton fits with the urea nozzle extends out of the left cover plate.

[0010] As a further technical solution, the right protection plate includes a right cover plate and a right cover plate heat insulation cotton. The right cover plate heat insulation cotton is located below the right cover plate, and the right cover plate and the right cover plate heat insulation cotton are riveted into a whole through a plurality of rivets.

[0011] As a further technical solution, the contour of the fitting position of the right cover plate and the right cover plate heat insulation cotton with the urea nozzle matches the outer contour of the urea nozzle.

[0012] As a further technical solution, the position where the right cover plate heat insulation cotton fits with the urea nozzle extends out of the right cover plate.

[0013] As a further technical solution, a plurality of bolt holes are provided on both the left protection plate and the right protection plate, and welding nuts are provided at positions on the inner surface of the post-treatment housing corresponding to the bolt holes. The bolts are installed through the bolt holes on the welding nuts to fix the left protection plate and the right protection plate to the post-treatment housing respectively.

[0014] As a further technical solution, the urea nozzle is connected to the urea nozzle seat through bolts, and the urea nozzle seat is welded on the urea nozzle seat housing.

[0015] As a further technical solution, through holes matching the urea nozzle are provided on both the post-treatment housing and the post-treatment inner housing.

[0016] The beneficial effects of the above embodiments of the present utility model are as follows:

[0017] The post-treatment urea nozzle protection structure provided by the present utility model clamps and installs the urea nozzle through the left protection plate and the right protection plate arranged. Compared with the existing protection structure, it can effectively prevent the accumulation of crops at the urea nozzle and avoid the risk of fire. In addition, the protection plate is composed of a cover plate heat insulation cotton and a cover plate, and the cover plate heat insulation cotton can play a good heat insulation role and reduce the temperature at the protection plate.

[0018] For the post-treatment urea nozzle protection structure provided by the present utility model, the left protection plate and the right protection plate are installed on the post-treatment outer shell through bolts, which is convenient for disassembly. When overhauling or replacing the urea nozzle, the left protection plate and the right protection plate can be disassembled, which is convenient for the overhaul or replacement of the urea nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The specification drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0020] Figure 1 is the existing protection structure of the urea nozzle;

[0021] Figure 2 is the top view of the existing protection structure of the urea nozzle;

[0022] Figure 3 is Figure 2 the sectional view taken along line A-A in

[0023] Figure 4 is Figure 3 the partial enlarged view at A in

[0024] Figure 5 is the structural schematic diagram of the bowl-shaped plug;

[0025] Figure 6 is the structural schematic diagram of the urea nozzle;

[0026] Figure 7 is the schematic diagram of the post-treatment urea nozzle protection structure of the present utility model;

[0027] Figure 8 is the top view of the post-treatment urea nozzle protection structure of the present utility model;

[0028] Figure 9 is Figure 8 the sectional view taken along line B-B in

[0029] Figure 10 is Figure 9 the partial enlarged view at B in

[0030] Figure 11It is a schematic structural view of the heat insulation cotton of the left cover plate of the present utility model;

[0031] Figure 12 It is a schematic structural view of the left cover plate of the present utility model;

[0032] Figure 13 It is a schematic view after riveting the left cover plate and the heat insulation cotton of the left cover plate.

[0033] The schematic view is only for illustration purposes;

[0034] Among them, 1. Urea nozzle seat housing; 2. Urea nozzle seat; 3. Inner housing of post-treatment; 4. Outer housing of post-treatment; 5. Bowl-shaped plug; 6. Urea nozzle; 7. Left cover plate; 8. Right cover plate; 9. Cover plate rivet; 10. Bolt; 11. Welding nut; 12. Heat insulation cotton of right cover plate; 13. Heat insulation cotton of left cover plate; 14. Bolt hole. Specific embodiments

[0035] It should be noted that the following detailed description is exemplary and is intended to provide further illustration of the present utility model. Unless otherwise specified, all technical and scientific terms used in the present utility model have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs.

[0036] Embodiment 1

[0037] In a typical embodiment of the present utility model, as Figures 7 to 13 shown, a post-treatment urea nozzle protection structure is provided, which includes a left protection plate and a right protection plate that are butt-jointed. The butt-jointed left protection plate and right protection plate are closely attached to the outer wall surface of the urea nozzle 6; the left protection plate and the right protection plate are installed on the outer surface of the outer housing 4 of the post-treatment through bolts 10, and the installed left protection plate and right protection plate protrude from the outer surface of the outer housing 4 of the post-treatment.

[0038] As Figures 11 - 13 shown, the left protection plate includes a left cover plate 7 and a heat insulation cotton 13 of the left cover plate. The heat insulation cotton 13 of the left cover plate is located below the left cover plate 7. The left cover plate 7 and the heat insulation cotton 13 of the left cover plate are riveted into a whole through a plurality of rivets to form the left protection plate.

[0039] Furthermore, the contour of the fitting position of the left cover plate 7 and the heat insulation cotton 13 of the left cover plate with the urea nozzle 6 matches the outer contour of the urea nozzle 6. The position where the heat insulation cotton 13 of the left cover plate fits with the urea nozzle 6 extends out of the left cover plate, so as to realize that when the left cover plate 7 fits with the urea nozzle 6, the protruding heat insulation cotton 13 of the left cover plate is squeezed, avoiding direct contact between the left cover plate 7 and the urea nozzle 6 and causing scratches and abrasions to the urea nozzle.

[0040] The structures of the left protection plate and the right protection plate are similar. The right protection plate includes a right cover plate 8 and a right cover plate heat insulation cotton 12. The right cover plate heat insulation cotton 12 is located below the right cover plate 8. The right cover plate 8 and the right cover plate heat insulation cotton 12 are riveted into a whole by a plurality of rivets to form the right protection plate.

[0041] Furthermore, the contour of the fitting positions of the right cover plate 8 and the right cover plate heat insulation cotton 12 with the urea nozzle 6 matches the outer contour of the urea nozzle 6. The position where the right cover plate heat insulation cotton 12 fits with the urea nozzle 6 extends out of the right cover plate 8. When the right cover plate 8 fits with the urea nozzle 6, the extended right cover plate heat insulation cotton 12 is squeezed to prevent the right cover plate 8 from directly contacting the urea nozzle 6 and causing scratches and wear to the urea nozzle.

[0042] In this embodiment, a plurality of bolt holes 14 are provided on both the left protection plate and the right protection plate. Welding nuts 11 are provided at positions on the inner surface of the aftertreatment housing 4 corresponding to the bolt holes 14. The bolts 10 are installed through the bolt holes 14 on the welding nuts 11 to fix the left protection plate and the right protection plate to the aftertreatment housing 4 respectively.

[0043] In this embodiment, the urea nozzle 6 is connected to the urea nozzle seat 2 by bolts, and the urea nozzle seat 2 is welded to the urea nozzle seat housing 1.

[0044] Furthermore, through holes matching the urea nozzle are provided on both the aftertreatment housing 4 and the aftertreatment inner housing 3 to prevent interference with the urea nozzle 6.

[0045] The installation process of the aftertreatment urea nozzle protection structure provided in this embodiment is as follows:

[0046] First, weld the urea nozzle seat 2 to the urea nozzle seat housing 1, connect the urea nozzle 6 to the urea nozzle seat 2 by bolts, and drill holes of appropriate sizes on the aftertreatment inner housing 3 and the aftertreatment housing 4 to prevent interference with the urea nozzle 6; the left cover plate 7 and the left cover plate heat insulation cotton 13 are designed in a shape that closely fits the nozzle body of the urea nozzle. The left cover plate 7 and the left cover plate heat insulation cotton 13 are riveted together by cover plate rivets 9 to form a whole, that is, the left protection plate, and it is closely attached to the urea nozzle 6 and the aftertreatment housing; in addition, 4 openings of appropriate sizes are designed on the left cover plate 7 and the aftertreatment housing 4 respectively, and 4 welding nuts 11 are welded on the inner surface of the aftertreatment housing. Finally, connect the left protection plate to the aftertreatment housing by bolts 10. Similarly, the right cover plate 8 and the right cover plate heat insulation cotton 12 form the right protection plate through cover plate rivets. Finally, the protection structures on both sides tightly protect the urea nozzle without any gaps; through the above structure, it can effectively prevent the accumulation of crops at the gaps of the urea nozzle and avoid the risk of fire.

[0047] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A post-treatment urea nozzle protection structure, characterized in that: It comprises a left protective plate and a right protective plate butted against each other, and the butted left protective plate and the right protective plate are closely fitted with the outer wall surface of the urea nozzle; the left protective plate and the right protective plate are installed on the outer surface of the after-treatment outer shell by bolts, and the installed left protective plate and the right protective plate protrude from the outer surface of the after-treatment shell.

2. The post-treatment urea nozzle protection structure according to claim 1, characterized in that: The left protective plate includes a left cover plate and left cover plate heat insulation cotton, wherein the left cover plate heat insulation cotton is located below the left cover plate, and the left cover plate and the left cover plate heat insulation cotton are riveted into a whole by a plurality of rivets.

3. The post-treatment urea nozzle protection structure according to claim 2, characterized in that: The contours of the positions where the left cover plate and the left cover plate heat insulation cotton fit with the urea nozzle match the outer contour of the urea nozzle.

4. The post-treatment urea nozzle protection structure according to claim 3, characterized in that: The position where the left cover plate heat insulation cotton is in contact with the urea nozzle extends out of the left cover plate.

5. The post-treatment urea nozzle protection structure according to claim 1, characterized in that: The right protective plate includes a right cover plate and right cover plate heat insulation cotton, wherein the right cover plate heat insulation cotton is located below the right cover plate, and the right cover plate and the right cover plate heat insulation cotton are riveted into a whole by a plurality of rivets.

6. The post-treatment urea nozzle protection structure according to claim 5, characterized in that: The contours of the positions where the right cover plate and the right cover plate heat insulation cotton fit with the urea nozzle match the outer contour of the urea nozzle.

7. The post-treatment urea nozzle protection structure according to claim 6, characterized in that: The position where the heat insulation cotton of the right cover plate is in contact with the urea nozzle extends out of the right cover plate.

8. The post-treatment urea nozzle protection structure according to claim 1, characterized in that: The left protective plate and the right protective plate are both provided with a plurality of bolt holes, and welding nuts are provided at positions corresponding to the bolt holes on the inner surface of the post-processing outer shell. The bolts are passed through the bolt holes and installed on the welding nuts to fix the left protective plate and the right protective plate to the post-processing outer shell respectively.

9. The post-treatment urea nozzle protection structure according to claim 1, characterized in that: The urea nozzle is connected to the urea nozzle seat by bolts, and the urea nozzle seat is welded to the urea nozzle seat housing.

10. The post-treatment urea nozzle protection structure according to claim 1, characterized in that: The post-processing outer shell and the post-processing inner shell are both provided with through holes matching the urea nozzle.

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