CN217481375U - Rectangular independent quality sensor for detecting urea concentration - Google Patents

Abstract

The utility model discloses a rectangle stand alone type quality sensor for detecting urea concentration, including sensor housing, the detection face, set up integrated circuit board in sensor housing and the light source projecting pole and the light source receiving terminal of being connected with integrated circuit board, sensor housing is the cuboid shape, the detection face is established on sensor housing's a side, transparent material is chooseed for use to the detection face, it all detects the structure to detection face outside bellied bubble water conservancy diversion structure and temperature detection to still be equipped with on the detection face, bubble water conservancy diversion structure contains a angle and has and only the summit of a angle towards the direction setting that the liquid level descends at liquid level direction of lift's cross-section at least. Has the advantages that: the device has the advantages of small occupied installation section, effective integration on the urea pump integration body, no bubble adsorption on the detection surface, high urea concentration detection precision, small occupied space, large temperature measurement contact surface, short corresponding time of temperature measurement and high temperature measurement precision.

Description

Rectangular independent quality sensor for detecting urea concentration

Technical Field

The utility model relates to a vehicle exhaust's nitrogen oxide handles technical field, concretely relates to rectangle stand alone type quality sensor for detecting urea concentration.

Background

The Selective Catalytic Reduction (SCR) technology is a treatment process for NOx in tail gas emission of diesel vehicles, i.e. under the action of a catalyst, a reducing agent ammonia or urea is injected to reduce NOx in tail gas into N2 and H2O. Although SCR systems are effective in removing nox from automobile exhaust, their treatment efficiency is directly related to the urea concentration, and urea quality sensors are required to monitor the urea concentration in SCR systems. And for the urea pump system of adaptation high integration, need independent type quality sensor, current independent type quality sensor adopts cylindrical structure more, and its detection face is cylindrical structure's cross section, often need set up the cross section of great area in order to satisfy the measurement demand, leads to occupying very big pump body effective space, restriction pump body overall arrangement. In addition, a large amount of bubbles are generated when urea is added into the urea box, the bubbles are very easy to attach to a detection surface, measurement is inaccurate, and measurement precision is affected. In addition, the temperature measuring elements of the existing urea quality sensor are mostly wrapped in the sensor shell, and are easily affected by the heat generated by an electronic board in the quality sensor, so that the temperature detection precision is poor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an it is not enough that prior art is overcome to the purpose, provides a rectangle stand alone type quality sensor for detecting urea concentration, and it is little to occupy the installation cross-section, can effectively integrate on urea pump integrated body, and the detection face bubble-free adsorbs, and urea concentration detection precision is high, and it is little to occupy the space, and the temperature measurement contact surface is big, and temperature measurement corresponding time is short, and the temperature measurement precision is high.

The purpose of the utility model is achieved through the following technical measures: the utility model provides a rectangle stand alone type quality sensor for detecting urea concentration, includes sensor housing, detection face, sets up integrated circuit board in sensor housing and the light source emitter and the light source receiving terminal of being connected with integrated circuit board, sensor housing is the cuboid shape, the detection face is established on a side of sensor housing, transparent material is chooseed for use to the detection face, it all detects the structure to detection face outside bellied bubble water conservancy diversion structure and temperature detection to still be equipped with on the detection face, the bubble water conservancy diversion structure contains a angle and has and only the direction setting of the summit orientation liquid level decline of an angle at the cross-section of liquid level lift direction at least.

Further, the temperature detection structure comprises a temperature sensor and a detection shell, the detection shell is connected with the detection surface and protrudes towards the outer side of the detection surface, and the temperature sensor is arranged inside the detection shell and connected with the integrated circuit board.

Further, a mounting seat is arranged at the bottom of the sensor shell and is matched with a mounting hole in the urea pump integrated body or the urea box for use.

Furthermore, a sealing ring is arranged on the mounting seat.

Furthermore, a screw mounting structure is arranged on the mounting seat, and a mounting screw hole is formed in the screw mounting structure.

Furthermore, a buckle bulge is arranged on the mounting seat and is matched with a clamping groove on the urea pump integrated body or the urea box for use.

Furthermore, still be equipped with the location arch on the mount pad, the location arch uses with the constant head tank cooperation on the urea pump integrated body or the urea case.

Compared with the prior art, the beneficial effects of the utility model are that: according to the rectangular independent quality sensor for detecting the urea concentration, a cuboid-shaped structure is adopted, and a detection surface is arranged on the side surface of a cuboid-shaped sensor shell, so that an effective detection area can be ensured, the radial cross section area of the quality sensor can be reduced, the installation area of the quality sensor on a urea pump integrated system is further reduced, and the quality sensor can be effectively distributed on the urea pump integrated system; the detection surface is also provided with a bubble guide structure protruding towards the outer side of the detection surface, bubbles are guided away by utilizing the backflow effect of the bubble guide structure, no protective sleeve is needed to be arranged, the detection surface area can be ensured to have no bubble adsorption, the detection precision of the urea concentration is improved, and the occupied space is small; the temperature detection structure protruding towards the outer side of the detection surface is arranged, so that the contact area between the urea solution and the temperature detection structure is increased, the response time of temperature detection is shortened, and the precision is improved.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a schematic structural view of the present invention having a screw mounting structure.

Fig. 2 is a schematic structural diagram of the present invention with a buckle protrusion.

Fig. 3 is a schematic diagram of a bubble diversion structure for diverting urea solution.

Fig. 4 is a reflection and refraction diagram of an optically denser medium to an optically thinner medium.

The device comprises a sensor shell 1, a detection surface 2, a bubble flow guide structure 3, a temperature detection structure 4, a mounting seat 5, a screw mounting structure 6, a positioning protrusion 7 and a buckle protrusion 8.

Detailed Description

As shown in fig. 1 to 4, a rectangular independent quality sensor for detecting urea concentration, includes sensor housing 1, detection face 2, set up the integrated circuit board in sensor housing 1 and the light source emitter and the light source receiving terminal of being connected with the integrated circuit board, sensor housing 1 is the cuboid shape, detection face 2 establishes on a side of sensor housing 1, and is further preferred, detection face 2 establishes on a side that sensor housing 1 area is big. The detection surface 2 is made of a transparent material, specifically, when the light source emitting electrode emits detection light on the detection surface 2, an incident angle theta 1 is generated, and the incident angle theta 1 is larger than a critical angle theta c. This application adopts the structure of cuboid shape, will detect face 2 and set up the side at the sensor housing 1 of cuboid shape, can ensure effective detection area, reducible quality sensor's radial cross sectional area again, and then reduce the installation area of quality sensor on urea pump integrated system, make quality sensor effectively overall arrangement on urea pump integrated system. The detection surface 2 is further provided with a bubble flow guide structure 3 and a temperature detection structure 4 which are all convex towards the outer side of the detection surface 2, and the cross section of the bubble flow guide structure 3 in the liquid level lifting direction at least comprises one angle and is provided with only one angle, and the top point of the angle is arranged towards the direction of the liquid level descending. Specifically, the cross section of the bubble diversion structure 3 in the liquid level lifting direction at least comprises one angle, and the direction from the opening end to the vertex of the angle is the same as the liquid level lifting direction. Further preferably, the cross section of the bubble diversion structure 3 in the liquid surface lifting direction is triangular, and one corner of the triangle is arranged towards the liquid surface descending direction. When urea is added into the urea box, a large amount of bubbles are generated, when dynamic balance is formed by the internal pressure and the external pressure of the bubbles, the bubbles are adsorbed on the detection surface 2, and when the liquid flow rate in the area of the detection surface 2 is stable, the dynamic balance of the bubbles is difficult to break, so that the bubbles are always adsorbed on the detection surface 2. Be equipped with on the quality sensor in this application to detecting 2 bellied bubble water conservancy diversion structures 3 in the outside of face, when adding urea toward the urea incasement, the liquid level of urea solution can rise gradually, when the liquid level rises to bubble water conservancy diversion structures 3, along with the continuation of liquid level rises, the liquid level can take place to shunt under the effect towards the angle of liquid level decline direction, according to the fluid effect this moment, the regional fluid pressure below the reposition of redundant personnel liquid level is greater than the regional fluid pressure above the reposition of redundant personnel liquid level, the dynamic balance of the regional adsorbed bubble below the reposition of redundant personnel liquid level has been broken effectively, the bubble is guided away along with the fluid direction, and then guarantee that 2 regional no bubbles of detection face adsorb, improve and detect the precision. In addition, the temperature detection structure 4 of this application is protruding towards the detection face 2 outside, has increased the area of contact of urea solution with temperature detection structure 4, and the response time that the temperature detected shortens, and the precision improves.

Temperature detection structure 4 includes temperature sensor and detection casing, it is protruding to detect the casing and be connected and towards the outside that detects face 2 with detection face 2, temperature sensor establishes and is connected inside and with integrated circuit board at the detection casing. The contact area of the temperature detection structure 4 and the urea solution can be increased by the aid of the raised detection shell, response time is shortened, the distance between the temperature sensor and the integrated circuit board inside the quality sensor can be increased by the aid of the temperature sensor arranged in the detection shell, influence of heat generation of the integrated circuit board on temperature detection is reduced, and detection precision is improved.

The sensor shell 1 bottom is equipped with mount pad 5, and quality sensor accessible mount pad 5 directly integrates on urea pump integrated body or urea case.

And a sealing ring is arranged on the mounting seat 5, and the urea solution is prevented from leaking outwards by utilizing the sealing effect of the sealing ring.

Mounting base 5 and urea pump integrated body or urea case's mounting means divide into two kinds in this application, one kind is the screw connection, promptly be equipped with screw mounting structure 6 on the mounting base 5, be equipped with the installation screw on the screw mounting structure 6, during the installation, it is fixed with screw mounting structure 6 and urea pump integrated body or urea case through the screw. The other type is a buckle connection, namely, a buckle bulge 8 is arranged on the mounting seat 5, and the buckle bulge 8 is matched with a clamping groove on a urea pump integrated body or a urea box for use. The user can select the mounting means according to the demand, when quality sensor need install compact structure's urea pump integrated body on, can select the little buckle connection mode of occupation space.

Still be equipped with location arch 7 on the mount pad 5, location arch 7 uses with the constant head tank cooperation on the urea pump integrated body or the urea case. The positioning protrusion 7 can play a positioning role, the rapid positioning during installation is realized, the installation time is saved, in addition, the positioning protrusion 7 can also assist the screw installation structure 6 or the buckle installation structure, the installation structure strength of the sensor in the circumferential direction is enhanced, and the phenomenon that the screw installation structure 6 or the buckle protrusion 8 is broken due to overlarge stress in the circumferential direction is prevented.

It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (7)

1. A rectangular freestanding quality sensor for detecting urea concentration, characterized by: including sensor housing, detection face, set up integrated circuit board in sensor housing and the light source emitter and the light source receiving terminal of being connected with integrated circuit board, sensor housing is the cuboid shape, the detection face is established on sensor housing's a side, transparent material is chooseed for use to the detection face, it all detects the structure to detection face outside bellied bubble water conservancy diversion structure and temperature to still be equipped with on the detection face, the bubble water conservancy diversion structure contains an angle at least and has and only the summit of an angle towards the direction setting that the liquid level descends in the cross-section of liquid level lift direction.

2. The oblong, freestanding quality sensor for detecting urea concentration of claim 1, characterized in that: the temperature detection structure comprises a temperature sensor and a detection shell, the detection shell is connected with the detection surface and protrudes towards the outer side of the detection surface, and the temperature sensor is arranged inside the detection shell and connected with the integrated circuit board.

3. The oblong, freestanding quality sensor for detecting urea concentration of claim 1, characterized in that: the sensor shell bottom is equipped with the mount pad, the mount pad uses with the mounting hole cooperation on the urea pump integrated body or the urea case.

4. The oblong, freestanding quality sensor for detecting urea concentration of claim 3, wherein: and a sealing ring is arranged on the mounting seat.

5. The oblong, freestanding quality sensor for detecting urea concentration of claim 3, wherein: the mounting seat is provided with a screw mounting structure, and the screw mounting structure is provided with a mounting screw hole.

6. The oblong, freestanding quality sensor for detecting urea concentration of claim 3, wherein: the mounting seat is provided with a buckle bulge, and the buckle bulge is matched with a clamping groove on the urea pump integrated body or the urea box for use.

7. An oblong, freestanding quality sensor for detecting urea concentration according to claim 5 or 6, characterized in that: still be equipped with the location arch on the mount pad, the location arch uses with the constant head tank cooperation on the urea pump integrated body or the urea case.

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