A device for detecting the back pressure of an SCR

Abstract

The utility model discloses a kind of SCR back pressure detection devices, including detection support, support plate is slidably inserted in the inside of the both ends of detection support, support plate one end is equipped with inner support pressure piece, transmission shaft is rotationally equipped in the middle of detection support, transmission shaft and two support plates are connected by gear and rack group transmission between, one side of detection support middle is equipped with pressure sensor by mounting seat, one side of pressure sensor is equipped with detection probe, the utility model is slidably inserted in the inside of the both ends of detection support by support plate and inner support pressure piece, transmission shaft and two support plates are connected by gear and rack group transmission between, so that by rotating transmission shaft to adjust two support plates moving towards, and inner support pressure piece is pressed and fixed in the inner wall of SCR back pressure pipeline, and transmission shaft is locked by locking bolt, the quick installation and fixation of detection equipment are realized, and the stability of installation and fixation is higher, and dismounting is convenient and fast.

Description

Technical Field

[0001] This utility model relates to the field of SCR back pressure detection technology, specifically an SCR back pressure detection device. Background Technology

[0002] Emission regulations for diesel engines are becoming increasingly stringent, and nitrogen oxides (NOx) are the most concerning pollutant in the diesel engine industry. Currently, Selective Catalytic Reduction (SCR) technology is widely used to purify NOx concentrations in exhaust gases. New restrictions on various emission pollutants necessitate the development of more efficient and innovative aftertreatment technologies, making the dual-SCR approach increasingly favored for achieving ultra-low NOx emissions. Compared to a single-SCR system, a dual-SCR system differs in its location, resulting in different operating temperatures and NOx conversion targets, thus requiring different thermal management and ammonia input strategies. The pressure in the SCR backpressure pipeline needs to be monitored during SCR system operation.

[0003] The existing technology, patent application number 202410335573.3, describes a dual-SCR aftertreatment system and engine that employs a two-stage control strategy. First, based on the exhaust NOx window ratio and the NOx conversion efficiency of the aftertreatment system, it controls the opening or closing of the low back pressure path and the high purification path. While the paths are open, the opening degree of the gas flow to the low back pressure path and the high purification path is controlled based on the back pressure value and real-time fuel consumption. This approach minimizes fuel loss while meeting low emission requirements. However, it is not convenient for quickly installing testing equipment, and the stability of the installation is relatively poor. Utility Model Content

[0004] The purpose of this invention is to provide an SCR back pressure detection device to solve the problems in the prior art where it is inconvenient to quickly install the detection equipment and the stability of the installation is generally poor.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an SCR back pressure detection device, including a detection bracket, with support plates slidably inserted inside both ends of the detection bracket, an inner support pressure plate at one end of the support plate, a transmission shaft rotatably disposed in the middle of the detection bracket, the transmission shaft and the two support plates being connected by a gear and rack assembly, a pressure sensor disposed on one side of the middle of the detection bracket via a mounting base, and a detection probe disposed on one side of the pressure sensor.

[0006] Furthermore, the support plate and the inner support plate are provided in two sets symmetrically about the center of the detection bracket, and one end of the support plate is provided with a limiting sliding hole that slides through the outer wall of the detection bracket.

[0007] Furthermore, the inner support plate is configured as an arc-shaped plate, and the outer wall of the inner support plate is provided with anti-slip protrusions.

[0008] Furthermore, one end of the drive shaft is provided with an adjustment handle, and a locking bolt is threaded onto the adjustment handle.

[0009] Furthermore, the gear and rack assembly includes a driven rack disposed on one side of the inner support plate, and a driving gear that meshes with the driven rack is disposed on the outer side of the transmission shaft.

[0010] Furthermore, the detection bracket is provided with a guide rod inside, and the guide rod is slidably configured with a guide groove inside one end of the support plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This invention features a support plate and an inner support plate that are slidably inserted into both ends of the testing bracket. The transmission shaft and the two support plates are connected by a gear and rack assembly. This allows the two support plates to move towards each other by rotating the transmission shaft, and the inner support plate is pressed and fixed onto the inner wall of the SCR back pressure pipe. The transmission shaft is then locked with locking bolts, enabling the testing equipment to be quickly installed and fixed. The installation and fixing are highly stable, and the disassembly and assembly are convenient and quick.

[0012] This utility model increases the contact area between the outer wall of the inner support plate and the inner wall of the pipe by setting the inner support plate into an arc shape. In addition, the outer wall of the inner support plate is provided with anti-slip protrusions, which increases the anti-slip properties of the outer side of the inner support plate and facilitates the improvement of the stability of the inner support plate in fixing to the inner wall of the pipe.

[0013] This invention features a guide rod inside the detection bracket, which slides with a guide groove inside one end of the inner support plate. One end of the support plate slides through a limiting sliding hole in the outer wall of the detection bracket. This design is used to guide the movement of the support plate, thereby improving the structural stability of the support plate and the inner support plate. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall installation structure of this utility model; Figure 2 This is a schematic diagram of the detection bracket structure of this utility model; Figure 3 This is a schematic diagram of the internal structure of the detection bracket of this utility model.

[0015] In the diagram: 1. SCR back pressure pipeline; 2. Detection bracket; 3. Support plate; 4. Inner support plate; 5. Limiting sliding hole; 6. Adjusting handle; 7. Locking bolt; 8. Pressure sensor; 9. Detection probe; 10. Anti-slip protrusion; 11. Drive shaft; 12. Drive gear; 13. Driven rack; 14. Guide rod; 15. Guide groove. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1 , Figure 2 , Figure 3 In this embodiment of the present invention, an SCR back pressure detection device includes a detection bracket 2. Support plates 3 are slidably inserted into both ends of the detection bracket 2. An inner support plate 4 is provided at one end of each support plate 3. Two sets of support plates 3 and inner support plates 4 are symmetrically arranged about the center of the detection bracket 2. One end of each support plate 3 slides through a limiting sliding hole 5 on the outer wall of the detection bracket 2. A transmission shaft 11 is rotatably mounted in the middle of the detection bracket 2. The transmission shaft 11 and the two support plates 3 are connected by a gear and rack assembly. The gear and rack assembly includes a driven rack 13 located on one side of the inner support plate 4. A driving gear 12 meshing with the driven rack 13 is located on the outer side of the transmission shaft 11. One end of the drive shaft 11 is equipped with an adjustment handle 6, and the adjustment handle 6 is threaded with a locking bolt 7, so that the two support plates 3 can be moved towards each other by rotating the drive shaft 11, and the inner support plate 4 is pressed and fixed on the inner wall of the SCR back pressure pipe 1. The drive shaft 11 is locked by the locking bolt 7, so as to realize the quick installation and fixation of the testing equipment. Moreover, the installation and fixation are highly stable and easy to disassemble and assemble. A pressure sensor 8 is provided on one side of the middle of the testing bracket 2 through the mounting seat. The pressure sensor 8 adopts a common model in this field. A detection probe 9 is provided on one side of the pressure sensor 8. The detection probe 9 is used to detect and process the air pressure in the SCR back pressure pipe 1 in real time.

[0018] like Figure 1 and Figure 2 As shown, in order to improve the stability of the inner support plate 4 in fixing to the inner wall of the pipe, the inner support plate 4 is also set as an arc-shaped plate, which increases the contact area between the outer wall of the inner support plate 4 and the inner wall of the pipe. In addition, the outer wall of the inner support plate 4 is provided with anti-slip protrusions 10, which increases the anti-slip properties of the inner support plate 4 and facilitates the improvement of the stability of the inner support plate 4 in fixing to the inner wall of the pipe.

[0019] like Figure 2 and Figure 3 As shown, a guide rod 14 is also provided inside the detection bracket 2, and the guide rod 14 is slidably set with the guide groove 15 inside one end of the support plate 3. This is used to guide the support plate 3 when it is moved and adjusted, which helps to improve the structural stability of the support plate 3 and the inner support plate 4.

[0020] The working principle and usage process of this utility model are as follows: In use, the support plates 3 and inner support plates 4 are slidably inserted into the two ends of the detection bracket 2. The transmission shaft 11 and the two support plates 3 are connected by a gear and rack assembly, so that the two support plates 3 can be moved towards each other by rotating the transmission shaft 11. The inner support plates 4 are pressed and fixed on the inner wall of the SCR back pressure pipe 1, and the transmission shaft 11 is locked by the locking bolts 7, so as to realize the quick installation and fixation of the detection equipment. Then, the detection probe 9 is used to detect and process the air pressure in the SCR back pressure pipe 1 in real time. Moreover, the installation and fixation are highly stable and the disassembly and assembly are convenient and quick.

[0021] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An SCR back pressure detection device, comprising a detection bracket (2), characterized in that: The detection bracket (2) has a support plate (3) slidably inserted inside both ends. One end of the support plate (3) is provided with an inner support pressure plate (4). The detection bracket (2) has a drive shaft (11) rotatably installed in the middle. The drive shaft (11) and the two support plates (3) are connected by a gear and rack group. One side of the middle of the detection bracket (2) is provided with a pressure sensor (8) through a mounting seat. One side of the pressure sensor (8) is provided with a detection probe (9). One end of the drive shaft (11) is provided with an adjustment handle (6). The adjustment handle (6) is threaded with a locking bolt (7).

2. The SCR back pressure detection device according to claim 1, characterized in that: The support plate (3) and the inner support plate (4) are provided in two sets symmetrically about the center of the detection bracket (2), and one end of the support plate (3) slides through the limiting sliding hole (5) on the outer wall of the detection bracket (2).

3. The SCR back pressure detection device according to claim 2, characterized in that: The inner support plate (4) is configured as an arc-shaped plate, and the outer wall of the inner support plate (4) is provided with anti-slip protrusions (10).

4. The SCR back pressure detection device according to claim 1, characterized in that: The gear and rack assembly includes a driven rack (13) disposed on one side of the inner support plate (4), and a driving gear (12) that meshes with the driven rack (13) is provided on the outside of the transmission shaft (11).

5. The SCR back pressure detection device according to claim 4, characterized in that: The detection bracket (2) is provided with a guide rod (14) inside, and the guide rod (14) is slidably connected to the guide groove (15) inside one end of the support plate (3).

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