Nitrogen-oxygen sensor with gas inlet protection function

Abstract

The utility model discloses a nitrogen-oxygen sensor with an air inlet protection function, and relates to the field of nitrogen-oxygen sensors. A nitrogen-oxygen sensor with an air inlet protection function comprises a base and further comprises a filtering water tank fixedly connected to the base, and water is arranged in the filtering water tank; a gas inlet pipeline is fixedly connected to the filtering water tank, a gas buffer cavity is fixedly connected to the filtering water tank and the gas inlet pipeline, a gas outlet pipeline is fixedly connected to the gas buffer cavity, and gas of the gas inlet pipeline reaches the gas buffer cavity through water in the filtering water tank; gas is primarily filtered through water in the filtering water tank, solid particles and pollutants are intercepted in a physical mode, impurities entering a subsequent structure are reduced, the filtering plate in the gas buffering cavity is further filtered for the second time, and the flow guide plate is matched to guide gas flow to flow uniformly, so that the gas entering the nitrogen-oxygen sensor is purer, and the gas quality is improved. The interference of impurities on a detection result is reduced, and the accuracy of nitrogen and oxygen concentration detection is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to nitrogen oxygen sensor technical field, concretely relates to an air inlet protection's nitrogen oxygen sensor. BACKGROUND

[0002] The nitrogen oxygen sensor (NOx sensor) is a key element for monitoring the concentration of nitrogen oxides in engine exhaust, and its accuracy directly affects the performance of the emission control system. Existing sensors are usually directly exposed to exhaust gas, which often contains particulate matter, oil mist, water vapor and other pollutants, which can easily cause the following problems: particulate matter blocks the sensor gas path, affecting gas diffusion efficiency.

[0003] Although there are filter devices in the prior art, most of them are single filter screens that cannot balance water resistance, anti-clogging and gas flow efficiency. The present application aims to provide a multi-layer protection, self-cleaning air inlet protection structure. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide an air inlet protection nitrogen oxygen sensor that can overcome the above problems or at least partially solve the above problems.

[0005] To solve the above technical problems, the basic idea of the technical scheme of the utility model is: an air inlet protection nitrogen oxygen sensor, comprising a base, further comprising: a filter water tank fixedly connected to the base, a water tank is arranged inside the filter water tank; a gas inlet pipe is fixedly connected to the filter water tank, a gas buffer cavity is fixedly connected to the filter water tank and the gas inlet pipe, a gas outlet pipe is fixedly connected to the gas buffer cavity, and the gas in the gas inlet pipe passes through the water in the filter water tank to reach the gas buffer cavity.

[0006] Further, a rotating shaft is rotatably connected to the gas inlet pipe, a handle is connected to the rotating shaft, a return spring is fixedly connected to the handle, and the gas inlet pipe is fixedly connected to the return spring.

[0007] Further, a control leaf is fixedly connected to the rotating shaft, and the outer diameter of the control leaf is the same as the inner diameter of the gas inlet pipe.

[0008] Further, an air inlet groove and an air outlet groove are formed in the gas buffer cavity, the air inlet groove is formed at one end close to the gas inlet pipe, and the air outlet groove is formed at one end of the gas outlet pipe.

[0009] Further, a protective shell, a flow guide plate and a filter plate are inserted into the gas buffer cavity, the protective shell is wrapped around the top of the gas buffer cavity, the flow guide plate is arranged on the inner wall of the protective shell, the flow guide plate is provided with a flow guide groove, and the filter plate is arranged on the inner wall of the flow guide plate.

[0010] Further, the flow guide plate and the filter plate are inserted above the air inlet groove and the air outlet groove.

[0011] Further, the gas outlet pipeline is screwed with the nitrogen oxygen sensor.

[0012] After the technical scheme is applied, compared with the prior art, the utility model has the following beneficial effects: the utility model preliminarily filters gas through the water in the filter tank, intercepts solid particles and pollutants through a physical way, reduces impurities into subsequent structures, the filter plate in the gas buffer cavity further filters twice, cooperates with the deflector to guide airflow to flow uniformly, ensures that the gas entering the nitrogen oxygen sensor is purer, reduces the interference of impurities on the detection result, and improves the accuracy of nitrogen oxygen concentration detection.

[0013] The rotation shaft, the handle, the control blade and the reset spring of the gas inlet pipeline form a flow regulating structure, the angle of the control blade can be adjusted by rotating the handle, the gas inlet amount can be flexibly changed, and the gas inlet demand of different scenes can be adapted to; the reset spring ensures the reset of the structure and maintains a stable gas inlet state.

[0014] The gas buffer cavity buffers airflow through the gas inlet groove, the gas outlet groove and the space in the cavity, stabilizes the gas flow rate, avoids the interference of airflow impact on detection, and makes the detection of the nitrogen oxygen sensor more stable.

[0015] The protective shell wraps the gas buffer cavity to prevent external impurities from invading; the multiple filtering structures such as the filter tank and the filter plate reduce the physical damage and pollution of impurities to the nitrogen oxygen sensor, and prolong the service life of the sensor.

[0016] The specific embodiments of the utility model will be described in further detail below with reference to the drawings. DRAWINGS

[0017] In the drawings:

[0018] Figure 1 A perspective structural schematic view of the nitrogen oxygen sensor with gas inlet protection is provided for the utility model;

[0019] Figure 2 A sectional view structural schematic view of the nitrogen oxygen sensor with gas inlet protection is provided for the utility model;

[0020] Figure 3 A structural schematic view of the gas buffer cavity and the deflector of the nitrogen oxygen sensor with gas inlet protection is provided for the utility model;

[0021] Figure 4 A structural schematic view of the filter plate in the gas buffer cavity of the nitrogen oxygen sensor with gas inlet protection is provided for the utility model.

[0022] In the figure: 1, base; 2, filter water tank; 3, air inlet pipe; 31, rotating shaft; 32, rotating handle; 33, return spring; 34, control leaf; 4, gas buffer cavity; 41, air inlet groove; 42, air outlet groove; 43, protective shell; 44, flow guide plate; 45, filter plate; 5, air outlet pipe; 6, nitrogen oxygen sensor. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the utility model embodiment clearer, the technical scheme in the embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment. The following embodiments are used to illustrate the utility model, but not to limit the scope of the utility model.

[0024] Embodiment: refer to Figures 1-4 An air inlet protected nitrogen oxygen sensor, comprising a base 1, further comprising: a filter water tank 2 fixedly connected to the base 1, water being arranged in the filter water tank 2; an air inlet pipe 3 fixedly connected to the filter water tank 2, a gas buffer cavity 4 fixedly connected to the filter water tank 2 and the air inlet pipe 3, an air outlet pipe 5 fixedly connected to the gas buffer cavity 4, gas in the air inlet pipe 3 reaching the gas buffer cavity 4 through the water in the filter water tank 2;

[0025] A rotating shaft 31 is rotatably connected to the air inlet pipe 3, a rotating handle 32 is pipe-connected to the rotating shaft 31, a return spring 33 is fixedly connected to the rotating handle 32, and the air inlet pipe 3 is fixedly connected to the return spring 33;

[0026] A control leaf 34 is fixedly connected to the rotating shaft 31, and the outer diameter of the control leaf 34 is the same as the inner diameter of the air inlet pipe 3;

[0027] An air inlet groove 41 and an air outlet groove 42 are formed in the gas buffer cavity 4, the air inlet groove 41 is formed at one end close to the air inlet pipe 3, and the air outlet groove 42 is formed at one end of the air outlet pipe 5;

[0028] A protective shell 43, a flow guide plate 44 and a filter plate 45 are inserted into the gas buffer cavity 4, the protective shell 43 is wrapped outside the gas buffer cavity 4, the flow guide plate 44 is arranged on the inner wall of the protective shell 43, the flow guide plate 44 is provided with a flow guide groove, and the filter plate 45 is arranged on the inner wall of the flow guide plate 44;

[0029] The flow guide plate 44 and the filter plate 45 are inserted directly above the air inlet groove 41 and the air outlet groove 42;

[0030] The nitrogen oxygen sensor 6 is threadedly connected to the air outlet pipe 5;

[0031] External gas enters through the air inlet pipe 3, first passes through the water in the filter water tank 2, the water preliminarily filters solid particles and part of pollutants in the gas, realizes physical purification, reduces the influence of impurities on the subsequent structure, the rotating shaft 31, the rotating handle 32 and the reset spring 33 on the air inlet pipe 3 constitute a flow regulating structure, rotating the rotating handle 32 drives the rotating shaft 31 to rotate, controls the rotating blade 34 to rotate, by adjusting the angle of the rotating blade 34 in the air inlet pipe 3, the gas flow area is changed, so that the air inlet is adjusted, and the reset spring 33 ensures that the rotating handle 32 resets when there is no external force, maintains a stable air inlet state, and the filtered gas enters the gas buffer cavity 4. The gas buffer cavity 4 receives the gas through the air inlet groove 41, buffers the gas flow by using the space in the cavity, and stabilizes the gas flow rate. At the same time, the guide groove of the guide plate 44 guides the uniform flow of the gas, avoids the interference of the gas flow impact on the subsequent detection, the filter plate 45 in the gas buffer cavity 4 carries out secondary filtration on the gas, further removes residual impurities, and the shell 43 wraps the gas buffer cavity 4, prevents external impurities from entering, cooperates with the guide plate 44 and the filter plate 45, and improves the gas purification effect. The purified gas enters the air outlet pipe 5 through the air outlet groove 42, and is finally conveyed to the nitrogen oxygen sensor 6 threadedly connected with the air outlet pipe 5, the nitrogen oxygen sensor 6 detects and analyzes the nitrogen oxygen composition in the gas, outputs detection data, and completes the whole working process.

[0032] The utility model discloses a water in filter water tank 2 carries out preliminary filtration to gas, intercepts solid particles and pollutants through the physical way, reduces the impurity into the subsequent structure, and the filter plate 45 in the gas buffer cavity 4 further carries out secondary filtration, cooperates with the guide plate 44 and guides the uniform flow of the gas flow, ensures that the gas entering the nitrogen oxygen sensor 6 is more pure, reduces the interference of impurities on the detection result, and improves the accuracy of nitrogen oxygen concentration detection.

[0033] The rotating shaft 31, the rotating handle 32, the rotating blade 34 and the reset spring 33 of the air inlet pipe 3 constitute a flow regulating structure, the angle of the rotating blade 34 can be adjusted by rotating the rotating handle 32, the air inlet can be flexibly changed, and the air inlet demand of different scenes is adapted.

[0034] The gas buffer cavity 4 buffers the gas flow by the air inlet groove 41, the air outlet groove 42 and the space in the cavity, stabilizes the gas flow rate, avoids the interference of the gas flow impact on the detection, and makes the detection of the nitrogen oxygen sensor 6 more stable.

[0035] The shell 43 wraps the gas buffer cavity 4, prevents external impurities from invading, and multiple filtering structures such as the filter water tank 2 and the filter plate 45 reduce the physical damage and pollution of impurities on the nitrogen oxygen sensor 6, and prolong the service life of the sensor.

[0036] The above merely describes preferred embodiments of the present application and is not intended to limit the present application in any form. Although the present application has been disclosed with preferred embodiments, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above-mentioned technical content without departing from the technical solution of the present application, and equivalent embodiments with equivalent changes can be obtained. Any simple modification, equivalent change and modification of the above embodiments based on the technical essence of the present application are still within the scope of the present application.

Claims

1. A nitrogen-oxygen sensor for intake protection, comprising a base (1), characterized in that, Also includes: A filter tank (2) is fixedly connected to the base (1), and water is provided inside the filter tank (2); An air inlet pipe (3) is fixedly connected to the filter water tank (2). A gas buffer chamber (4) is fixedly connected to the filter water tank (2) and the air inlet pipe (3). An air outlet pipe (5) is fixedly connected to the gas buffer chamber (4). The gas in the air inlet pipe (3) passes through the water inside the filter water tank (2) and reaches the gas buffer chamber (4).

2. The nitrogen oxide sensor for intake protection according to claim 1, characterized in that, A rotating shaft (31) is rotatably connected to the air intake pipe (3), a rotating handle (32) is connected to the rotating shaft (31), a return spring (33) is fixedly connected to the rotating handle (32), and the air intake pipe (3) is fixedly connected to the return spring (33).

3. A nitrogen-oxygen sensor for intake protection according to claim 2, characterized in that, A control blade (34) is fixedly connected to the rotating shaft (31), and the outer diameter of the control blade (34) is the same as the inner diameter of the air intake pipe (3).

4. A nitrogen-oxygen sensor for intake protection according to claim 1, characterized in that, The gas buffer chamber (4) is provided with an air inlet groove (41) and an air outlet groove (42). The air inlet groove (41) is located at one end near the air inlet pipe (3), and the air outlet groove (42) is located at one end of the air outlet pipe (5).

5. A nitrogen-oxygen sensor for intake protection according to claim 4, characterized in that, A protective shell (43), a guide plate (44), and a filter plate (45) are inserted into the gas buffer chamber (4). The protective shell (43) covers the upper exterior of the gas buffer chamber (4). The guide plate (44) is set on the inner wall of the protective shell (43) and has a guide groove. The filter plate (45) is set on the inner wall of the guide plate (44).

6. A nitrogen-oxygen sensor for intake protection according to claim 5, characterized in that, The guide plate (44) and filter plate (45) are inserted directly above the air inlet slot (41) and air outlet slot (42).

7. A nitrogen-oxygen sensor for intake protection according to claim 1, characterized in that, A nitrogen and oxygen sensor (6) is threaded onto the gas outlet pipe (5).

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