Detection device of urea injection system

Abstract

The utility model relates to the technical field of aftertreatment of tail gas exhausted by an engine, in particular to a detection device of a urea injection system. The urea injection system comprises a mixer and a urea nozzle seat arranged at the top of the mixer, the detection device comprises a light source emitting part and a camera shooting part, and the light source emitting part is used for being connected with the urea nozzle seat and comprises a light source piece and an optical assembly; the optical assembly is used for adjusting light beams emitted by the light source piece into divergent conical light beams and irradiating the divergent conical light beams to the inner wall of the mixer, and the camera shooting part is arranged at the bottom of the mixer and used for shooting the contact positions of the conical light beams and the inner wall of the mixer. According to the detection device, the light source emitting part is used for replacing urea injection, the light source piece and the optical assembly gather light beams into a conical shape, the urea injection shape is simulated, and therefore the urea injection position is accurately simulated. The camera part is located at the bottom of the mixer and used for capturing the contact position of the conical light beam and the inner wall of the mixer, and detection accuracy and efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of after-treatment of tail gas discharged by an engine, in particular to a detection device for a urea injection system. Background Art

[0002] In the field of automobile exhaust treatment, especially for diesel engines, selective catalytic reduction (SCR) technology is used to reduce nitrogen oxides (NO X ) emissions have become routine. SCR technology usually uses urea aqueous solution as a reducing agent, which is injected into the exhaust gas flow through an injection system. The accuracy of the injection system is crucial to the mixing of urea aqueous solution with exhaust gas and the subsequent chemical reaction. For example, the accuracy of the injection system depends on factors such as the position of the center hole of the nozzle seat relative to the mixer. In current technology, the accuracy of the injection system mainly relies on complex detection equipment, such as a three-coordinate measuring machine, which not only increases costs, but also is complicated to operate and inefficient. Utility Model Content

[0003] The purpose of the utility model is to at least solve the problem of how to efficiently and quickly detect the urea injection position. This purpose is achieved through the following technical solutions:

[0004] The utility model proposes a detection device for a urea injection system, the urea injection system comprising a mixer and a urea nozzle seat arranged at the top of the mixer, characterized in that the detection device comprises:

[0005] A light source emitting part, the light source emitting part is used to connect the urea nozzle seat, the light source emitting part comprises a light source part and an optical component, the optical component is used to gather the light beam emitted by the light source part into a cone-shaped light beam to irradiate the inner wall of the mixer;

[0006] A camera unit is disposed at the bottom of the mixer and is used to photograph a contact position between the cone-shaped light beam and an inner wall of the mixer.

[0007] According to the detection device of the urea injection system of the utility model, by using the light source emitting part to replace the urea injection, the light source part and the optical component gather the light beam into a cone shape, imitate the urea injection shape, and directly illuminate the inner wall of the mixer, so as to accurately simulate the position of urea injection. The camera part is located at the bottom of the mixer, which is used to capture the contact position between the cone-shaped light beam and the inner wall of the mixer, so that the operator can observe the injection position intuitively. Such a design not only simplifies the detection process of the urea injection system, avoids complex external measurement equipment, but also improves the accuracy and efficiency of the detection.

[0008] In addition, the detection device of the urea injection system according to the utility model may also have the following additional technical features:

[0009] In some embodiments of the present invention, a first through hole is provided on the top of the mixer, and a second through hole is provided on the urea nozzle seat. The first through hole and the second through hole are connected, and the diameter of the first through hole is larger than the diameter of the second through hole, and part of the light source emitting part is passed through the second through hole.

[0010] In some embodiments of the present invention, the optical component is disposed in the second through hole.

[0011] In some embodiments of the present invention, the light source is a laser lamp or a halogen lamp.

[0012] In some embodiments of the present invention, the optical component is a lens or a reflector.

[0013] In some embodiments of the present invention, the light source emitting portion further includes a shell, and the light source component is detachably connected to the shell.

[0014] In some embodiments of the present invention, the end of the light source facing the bottom of the mixer is connected to the optical component.

[0015] In some embodiments of the present invention, the imaging unit is a camera.

[0016] In some embodiments of the present invention, the camera portion coincides with an axis of the mixer.

[0017] In some embodiments of the present invention, the detection device includes a control device, and the control device is electrically connected to the camera unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0019] Figure 1 The structure diagram of the detection device of the urea injection system according to the embodiment of the utility model is schematically shown;

[0020] Figure 2 The cross-sectional structure diagram of the detection device of the urea injection system according to the embodiment of the utility model is schematically shown.

[0021] The reference numerals are as follows:

[0022] 100. Detection device;

[0023] 10. Light source emitting unit; 11. Shell; 12. Light source component; 13. Optical component; 20. Camera unit; 201. Mixer; 202. Urea nozzle seat. DETAILED DESCRIPTION

[0024] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0025] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0026] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0027] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both above and below orientations.

[0028] like Figure 1 to Figure 2 As shown, according to an embodiment of the utility model, a detection device 100 of a urea injection system is proposed, wherein the urea injection system includes a mixer 201 and a urea nozzle holder 202 arranged on the top of the mixer 201, and the detection device 100 includes a light source emitting unit 10 and a camera unit 20, the light source emitting unit 10 is used to connect the urea nozzle holder 202, the light source emitting unit 10 includes a light source part 12 and an optical component 13, the optical component 13 is used to adjust the light beam emitted by the light source part 12 into a divergent conical light beam and irradiate the inner wall of the mixer 201, the camera unit 20 is arranged at the bottom of the mixer 201, and the camera unit 20 is used to shoot the contact position between the conical light beam and the inner wall of the mixer 201.

[0029] According to the detection device 100 of the urea injection system of the utility model, by using the light source emitting unit 10 to replace the urea injection, the light source 12 and the optical component 13 gather the light beam into a cone, imitate the urea injection shape, and directly illuminate the inner wall of the mixer 201, so as to accurately simulate the position of urea injection. The camera unit 20 is located at the bottom of the mixer 201, and is used to capture the contact position between the cone-shaped light beam and the inner wall of the mixer 201, so that the operator can observe the injection position intuitively. Such a design not only simplifies the detection process of the urea injection system, avoids complex external measurement equipment, but also improves the accuracy and efficiency of the detection.

[0030] Specifically, the detection device 100 of the urea injection system includes a workbench for placing a mixer 201. The mixer 201 is placed on the workbench, and a light source emitting unit 10 is installed on the top of the mixer 201, and the light source emitting unit 10 replaces the urea nozzle. The position where the mixer 201 is placed on the workbench is designed as a glass structure for easy observation. The camera unit 20 is located below the glass structure. When the light source 12 emits light, the camera unit 20 can clearly see the irradiation position of the light source on the inner wall of the mixer 201 through the glass. Through this arrangement, the operator can directly observe the contact between the light beam and the inner wall of the mixer 201, so as to determine whether the mixer 201 meets the design requirements, ensure the accuracy of urea injection, and improve the efficiency and emission control performance of the entire SCR system.

[0031] It can be understood that the method of using the detection device 100 to detect the urea injection system is to first install the light source emitting unit 10, connect the light source emitting unit 10 to the urea nozzle holder 202, and the light source emitting unit 10 includes a light source component 12 and an optical component 13. Then turn on the light source component 12, and the light source component 12 emits a light beam, which is processed by the optical component 13 to form a conical light beam. The conical light beam is irradiated onto the inner wall of the mixer 201 to simulate the position of urea injection. The camera unit 20 is located at the bottom of the mixer 201, and is used to capture the contact position of the conical light beam with the inner wall of the mixer 201. The accuracy and effectiveness of urea injection are evaluated by observing and analyzing the contact position of the light beam on the inner wall of the mixer 201.

[0032] It is understandable that the detection device 100 also includes a control device, which is electrically connected to the camera unit 20. The control device can be specifically a computer system equipped with dedicated image processing and analysis software. The computer system receives the image data of the contact position between the conical light beam and the inner wall of the mixer 201 captured by the camera unit 20. During the detection process, the control device determines whether the urea injection system meets the design requirements through the following steps: first, image reception is performed, and image data of the contact position between the conical light beam and the inner wall of the mixer 201 is received from the camera unit 20. Secondly, image processing is performed to process the received image and extract key information, such as the shape, distribution and contact point of the light beam. Then, analysis and comparison are performed to compare the processed image data with the preset injection standard or model. Finally, the result is judged, and according to the results of the comparative analysis, it is judged whether the injection position of the urea injection system is accurate, so as to evaluate whether the system meets the design requirements. The control device can provide accurate evaluation to ensure the efficiency and accuracy of the urea injection system.

[0033] It is understandable that the urea injection system detection device 100 includes a workbench, on which a glass structure for placing a mixer 201 is provided for visual observation. A light source emitting unit 10 is installed on the top of the mixer 201 to replace the urea nozzle. The light source emitting unit 10 includes a light source component 12 and an optical component 13, the latter focusing the light beam to form a cone and irradiating the inner wall of the mixer 201. The camera unit 20 is located below the glass structure of the workbench to capture the contact position of the light source on the inner wall of the mixer 201. In addition, the detection device 100 also includes a control device electrically connected to the camera unit 20 for receiving and processing image data to determine whether the mixer 201 meets the design requirements. The detection device 100 not only improves the detection efficiency and accuracy, but also is easy to operate and easy to visually observe and evaluate.

[0034] In some embodiments, the top of the mixer 201 is provided with a first through hole, the urea nozzle holder 202 is provided with a second through hole, the first through hole and the second through hole are connected, and the diameter of the first through hole is greater than the diameter of the second through hole. The first through hole and the second through hole are connected to form a channel for the light beam of the light source emitting unit 10 to pass through.

[0035] Specifically, the optical component 13 is inserted into the second through hole. The optical component 13 is received in the second through hole, and the outer dimensions of the optical component 13 match the second through hole, ensuring that the optical component 13 can change with the installation angle of the urea nozzle seat 202, ensuring the relative position between the second through hole of the urea nozzle seat 202 and the first through hole of the mixer 201 is detected.

[0036] Specifically, the light source emitting part 10 includes a housing 11, and the light source part 12 is detachably connected to the housing 11. The housing 11 is detachably arranged on the urea nozzle seat 202. A quick interface mechanism, such as a snap or a quick plug-in connector, is provided between the housing 11 and the urea nozzle seat 202, which allows the housing 11 to be easily installed on the urea nozzle seat 202, so that it can be quickly disassembled when testing is required. In addition, one or more raised guide pins are provided on the housing 11 or the urea nozzle seat 202, and correspondingly, corresponding holes or grooves are provided on the other component. When the housing 11 is docked with the urea nozzle seat 202, the guide pins will be accurately inserted into the holes or grooves, thereby ensuring that the housing 11 is correctly aligned. Alternatively, one or more alignment grooves are designed on the urea nozzle seat 202, and the corresponding parts of the housing 11 are shaped to match the grooves. When the housing 11 is placed on the urea nozzle seat 202, these alignment grooves play a guiding role to ensure that the housing 11 is correctly installed in a specific direction. Furthermore, on the basis of the guide pin or the alignment groove, a quick locking mechanism is added, such as a rotary lock or a card-type lock, so as to quickly fix the housing 11 after it is correctly aligned.

[0037] Furthermore, a third through hole is provided on the housing 11, the third through hole is connected to the second through hole, and the third through hole is used for detachably installing the light source 12. It should be noted that the third through hole and the second through hole have the same diameter, and the second through hole and the third through hole are coaxially arranged. A threaded connection structure may be designed in the third through hole, and the circumferential outer surface of the light source 12 is provided with a threaded connection structure matching therewith, so that the light source 12 can be detachably installed in the through hole. Such a design allows the light source 12 to be easily disassembled when replacement or maintenance is required.

[0038] In some embodiments, the light source 12 is a laser lamp or a halogen lamp. The laser lamp can provide a highly focused light beam, which is very important for accurately simulating the urea injection position. The linear propagation characteristics of the laser can ensure that the light beam is accurately irradiated to a specific position on the inner wall of the mixer 201. The halogen lamp can provide high brightness and uniform illumination, which helps the camera 20 to clearly capture the contact point between the light source and the inner wall of the mixer 201. This is very important for comprehensively evaluating the performance of the injection system. These two light sources are very common in industrial applications, and their respective characteristics make the system design more flexible, and the most suitable light source can be selected according to different detection requirements.

[0039] Specifically, because the detection device 100 needs to perform detection work for a long time, the heat dissipation problem should also be considered when the light source 12 is a halogen lamp. For example, a heat sink is installed inside or outside the shell 11 near the light source 12. These heat sinks are usually made of materials with good thermal conductivity, such as aluminum, which can effectively conduct heat from the light source 12 and dissipate it into the environment. Alternatively, ventilation holes are designed in the shell 11 to promote air flow. These holes can allow hot air to be discharged from the inside of the shell 11 while introducing cooler air, thereby reducing the temperature around the light source. If necessary, a small cooling fan can be integrated in the shell 11 to provide additional forced air flow to further improve the heat dissipation efficiency. Through these heat dissipation measures, the heat generated by the halogen lamp can be effectively prevented from damaging the detection device 100, ensuring the stability and reliability of the detection device 100 during long-term operation.

[0040] In some embodiments, the optical component 13 is a lens or a reflector. If a lens is used as the optical component 13, it can be used to focus or disperse the light beam emitted by the light source. As needed, a convex lens or a concave lens can be selected to adjust the focus of the light beam to ensure that the light beam is accurately irradiated to a predetermined position on the inner wall of the mixer 201. The reflector can be used to change the direction of the light beam. This is very useful when the installation position of the light source is limited or requires irradiation at a specific angle. By accurately designing the curvature and angle of the reflector, the light beam can be effectively guided to a specific area of ​​the mixer 201. In this way, the lens or reflector of the optical component 13 can effectively manipulate the light beam and improve the accuracy and functionality of the entire urea injection system detection device 100.

[0041] It is understood that the refractive index of the lens or reflector should be designed so that the light beam can simulate the urea injection angle. The optical properties of the lens or reflector will be able to effectively simulate the injection behavior of urea in the mixer 201, thereby providing accurate feedback for the detection of the urea injection system.

[0042] In some embodiments, the optical component 13 is connected to one end of the light source near the bottom of the mixer 201, and the optical component 13 should be located at the lower end of the light source, close to the bottom of the mixer 201. Such a layout helps to ensure that the light beam is correctly irradiated to the target position of the inner wall of the mixer 201. Ensure that the light path design from the light source to the optical component 13 and then to the inner wall of the mixer 201 meets the angle and direction requirements of urea injection. The position and angle of the optical component 13 should be carefully calculated to simulate the path of actual urea injection. At the same time, the stability of the light source emitting unit 10 and the safety of operation are guaranteed. The optical component 13 needs to be firmly connected to the light source while maintaining accurate alignment with the bottom of the mixer 201. Through this design method, it can be ensured that the light beam is irradiated to the inner wall of the mixer 201 at an appropriate angle and position, thereby accurately simulating the effect of urea injection.

[0043] In some embodiments, the camera unit 20 is a camera, specifically a CCD camera. Such selection is mainly based on the high resolution and high sensitivity of the CCD camera, and can capture subtle light beam changes and detailed images. The CCD camera is installed at the bottom of the mixer 201 so that the contact position of the light beam emitted by the light source 12 on the inner wall of the mixer 201 can be clearly captured. The high-quality image capture capability of the CCD camera is utilized to ensure that the shape, brightness and contact point of the light beam can be recorded in detail. The CCD camera is electrically connected to the control device via an appropriate cable or wireless connection. This can be achieved through a standard interface such as USB, HDMI or a specific industrial connector. The control device will receive image data from the CCD camera for further processing and analysis. Such a configuration ensures the efficiency and accuracy of the detection device 100 in capturing and analyzing the contact position of the light beam with the mixer 201.

[0044] In some embodiments, the camera unit 20 coincides with the axis of the mixer 201, and the CCD camera should be precisely aligned with the central axis of the mixer 201. This ensures that the image captured by the camera is a symmetrical image about the central axis of the mixer 201, which helps to accurately analyze the contact position of the light beam on the inner wall of the mixer 201. The installation of the camera unit 20 should ensure that the lens or photosensitive element of the camera is completely aligned with the axis of the mixer 201. And a specific bracket or adjustment device is required to accurately adjust the position of the camera. This alignment method helps to improve the accuracy of image analysis because it can ensure that the shape and position of the captured light beam are consistent with its actual state in the mixer 201. By ensuring that the camera unit 20 coincides with the axis of the mixer 201, the accuracy and efficiency of the entire system in analyzing the urea injection effect can be improved.

[0045] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. A detection device for a urea injection system, the urea injection system comprising a mixer and a urea nozzle seat arranged at the top of the mixer, It is characterized in that The detection device comprises: A light source emitting part, the light source emitting part is used to connect the urea nozzle seat, the light source emitting part comprises a light source component and an optical component, the optical component is used to adjust the light beam emitted by the light source component into a divergent cone-shaped light beam and irradiate the light beam toward the inner wall of the mixer; A camera unit is disposed at the bottom of the mixer and is used to photograph a contact position between the cone-shaped light beam and the inner wall.

2. The detection device of the urea injection system according to claim 1, It is characterized in that A first through hole is provided on the top of the mixer, and a second through hole is provided on the urea nozzle seat. The first through hole is connected to the second through hole, and a diameter of the first through hole is larger than a diameter of the second through hole. Part of the light source emitting part is penetrated in the second through hole.

3. The detection device of the urea injection system according to claim 2, It is characterized in that The optical component is disposed in the second through hole.

4. The detection device of the urea injection system according to claim 1, It is characterized in that The light source is a laser lamp or a halogen lamp.

5. The detection device of the urea injection system according to claim 1, It is characterized in that The optical component is a lens or a reflector.

6. The detection device of the urea injection system according to claim 1, It is characterized in that The light source emitting portion further comprises a housing, and the light source component is detachably connected to the housing.

7. The detection device of the urea injection system according to any one of claims 1 to 6, It is characterized in that The optical component is connected to one end of the light source component facing the bottom of the mixer.

8. The detection device of the urea injection system according to any one of claims 1 to 6, It is characterized in that The imaging unit is a camera.

9. The detection device of the urea injection system according to any one of claims 1 to 6, It is characterized in that The camera unit coincides with an axis of the mixer.

10. The detection device of the urea injection system according to any one of claims 1 to 6, It is characterized in that The detection device includes a control device, and the control device is electrically connected to the imaging unit.

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