Oxygen sensor

Abstract

The utility model relates to the technical field of oxygen sensors, in particular to an oxygen sensor which comprises an oxygen sensor body, the upper end of the oxygen sensor body is fixedly sleeved with an air filter assembly, and the lower end of the oxygen sensor is fixedly connected with a fixing assembly. The air filtering assembly comprises a filtering pipe, the upper end of the filtering pipe is rotationally connected with a filtering cover, a filtering cup is arranged in the filtering pipe, bristles are attached to the outside of the filtering cup, and fan blades are arranged at the lower end of the filtering pipe. Inlet air of the oxygen sensor body cannot be blocked by dust through filtration of the filter pipe, the filter cover and the filter cup, the fan driven by the motor is further arranged to blow out the dust, detection distortion caused by dust blocking and inlet air reduction is avoided, the detection result is guaranteed, the brush bristles are further arranged to clean the filter cup, and maintenance is convenient.

Description

Technical Field

[0001] This utility model relates to the field of oxygen sensor technology, and in particular to an oxygen sensor. Background Technology

[0002] An oxygen sensor is a detection device, typically consisting of a sensor body and a detection probe. It is mainly used to measure the concentration of oxygen gas in the environment. It uses a ceramic sensing element to measure the oxygen potential in the environment and calculates the corresponding oxygen concentration based on the principle of chemical equilibrium. Oxygen sensors are widely used in coal mines, steel, petrochemicals, and medical fields.

[0003] A search of Chinese patent publication number CN203595682U reveals an oxygen sensor.

[0004] The above technical solution includes an oxygen concentration sensing element and a signal processing unit. The oxygen concentration sensing element is an electrochemical polarographic diaphragm oxygen electrode, which can convert the percentage of oxygen in the gas into a weak electrical signal proportional to the measured oxygen concentration. The signal processing unit amplifies the weak electrical signal output from the oxygen electrode and sends it to an analog-to-digital converter. After sampling and processing by a microcontroller, the signal is sent to a display circuit and an output circuit, where a digital tube displays the percentage of oxygen measured. This invention features a long lifespan, high measurement accuracy, good repeatability, simple structure, reliable performance, convenient debugging and maintenance, multi-functionality, low power consumption, increased sensor transmission distance, and strong shock resistance.

[0005] However, in the above solution, the oxygen sensor is in constant contact with air, and the dust in the air clogs the air inlet of the oxygen sensor, causing the oxygen sensor to fail. The conventional fixing method is used when fixing the sensor, which is very troublesome.

[0006] Therefore, we propose an oxygen sensor. Utility Model Content

[0007] The present invention aims to solve the technical problems existing in the prior art and provide an oxygen sensor.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: an oxygen sensor, comprising an oxygen sensor body, wherein an air filter assembly is fixedly sleeved on the upper end of the oxygen sensor body, and a fixing assembly is fixedly connected to the lower end of the oxygen sensor.

[0009] An air filter assembly includes a filter tube, a filter cover rotatably connected to the upper end of the filter tube, a filter cup disposed inside the filter tube, bristles attached to the outside of the filter cup, and a fan blade disposed at the lower end of the filter tube.

[0010] Preferably, the lower end of the filter cover is fixedly connected to two connecting rods, the brush bristles are fixedly connected to the inner side of the connecting rods, and the lower ends of the two connecting rods are fixedly connected to a support ring.

[0011] Preferably, a motor bracket is fixedly connected to the bottom end of the filter tube, a motor is fixedly connected to the motor bracket, and a fan blade is fixedly connected to the output end of the motor through the motor bracket.

[0012] Preferably, a filter cup holder is fixedly connected inside the filter tube, and the filter cup is fitted inside the filter cup holder. The mesh size of the filter cup is greater than that of the filter tube and the filter cover.

[0013] Preferably, the fixing component includes a support tube, a sealing tile is sealed to the lower end of the inner wall of the support tube, a spacer is slidably sealed inside the sealing tile, and a threaded sleeve is fixedly connected to the upper end of the spacer.

[0014] Preferably, the threaded sleeve is threaded onto the lead screw, the lead screw is fixedly connected to the lower end of the oxygen sensor body, and a lever is provided on the outside of the threaded sleeve.

[0015] Preferably, the lever passes through a groove formed on the wall of the support tube, the upper surface of the groove has a stepped gradient structure, and a rubber pad is fixedly connected to the bottom end of the support tube.

[0016] This invention provides an oxygen sensor, which has the following improvements and advantages compared with the prior art:

[0017] (1) This utility model adopts multi-layer filtration. An air filter assembly is fixedly sleeved on the upper end of the oxygen sensor body, and a fixing assembly is fixedly connected to the lower end of the oxygen sensor. The air filter assembly includes a filter tube, a filter cover is rotatably connected to the upper end of the filter tube, a filter cup is set inside the filter tube, bristles are attached to the outside of the filter cup, a fan blade is set at the lower end of the filter tube, two connecting rods are fixedly connected to the lower end of the filter cover, the bristles are fixedly connected to the inside of the connecting rods, a support ring is fixedly connected to the lower end of the two connecting rods, a motor bracket is fixedly connected to the bottom end of the filter tube, a motor is fixedly connected to the motor bracket, a fan blade is fixedly connected through the motor output end of the motor bracket, a filter cup holder is fixedly connected inside the filter tube, and the filter cup is sleeved in the filter cup holder. The mesh size of the filter cup is greater than that of the filter tube and the filter cover. The filtration of the filter tube, filter cover and filter cup prevents the air intake of the oxygen sensor body from being blocked by dust. A motor-driven fan is also provided to blow out the dust to avoid dust blockage and reduced air intake causing detection distortion, thus ensuring the detection results. The bristles are also provided to clean the filter cup for easy maintenance.

[0018] (2) This utility model uses vacuum adsorption for fixing. The fixing component includes a support tube, a sealing tile is sealed at the lower end of the inner wall of the support tube, a slidable sealing plate is connected inside the sealing tile, a threaded sleeve is fixedly connected to the upper end of the slid, the threaded sleeve is threaded to a screw rod, the screw rod is fixedly connected to the lower end of the oxygen sensor body, a lever is provided on the outside of the threaded sleeve, the lever passes through a groove opened on the wall of the support tube, and a rubber pad is fixedly connected to the bottom end of the support tube. By rotating the lever, the slid slides inward on the sealing tile, thereby creating a low pressure on one side of the slid, so that it can be fixed to the attachment. The fixing method is simple and easy to use. Attached Figure Description

[0019] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the present utility model;

[0021] Figure 2 This is a three-dimensional structural schematic diagram of the hollow filter assembly of this utility model;

[0022] Figure 3 This is a schematic plan view of the fixing component in this utility model.

[0023] Legend:

[0024] 10. Air filter assembly; 11. Filter tube; 12. Filter cover; 13. Motor bracket; 14. Motor; 15. Fan blade; 16. Filter cup holder; 17. Filter cup; 18. Connecting rod; 19. Support ring; 20. Brush bristles; 21. Oxygen sensor body; 30. Fixing assembly; 31. Support tube; 32. Slot; 33. Sealing tile; 34. Rubber gasket; 35. Partition; 36. Lead screw; 37. Sleeve; 38. Lever. Detailed Implementation

[0025] The invention will now be further described with reference to the accompanying drawings and specific embodiments: Example

[0026] Please see Figures 1 to 2Example 1 describes an oxygen sensor body 21. An air filter assembly 10 is fixedly sleeved on the upper end of the oxygen sensor body 21. The air filter assembly 10 filters dust. A fixing assembly 30 is fixedly connected to the lower end of the oxygen sensor. The air filter assembly 10 includes a filter tube 11, with a filter cover 12 rotatably connected to the upper end of the filter tube 11. The filter tube 11 and filter cover 12 filter large dust particles. A filter cup 17 is disposed inside the filter tube 11, filtering small dust particles. Brush bristles 20 are attached to the outside of the filter cup 17 for cleaning its surface. A fan blade 15 is disposed at the lower end of the filter tube 11, increasing the air exchange rate. Two connecting rods 18 are fixedly connected to the lower end of the filter cover 12. The filter tube 11 is fixedly connected to the inner side of the connecting rod 18. The lower ends of the two connecting rods 18 are fixedly connected to the support rings 19. The filter cover 12 rotates to drive the bristles 20 to clean the surface of the filter cup 17. The function of the support rings 19 is to prevent the connecting rods 18 from deforming, so that the bristles 20 do not contact the filter cup 17. The bottom end of the filter tube 11 is fixedly connected to the motor bracket 13. The motor 14 is fixedly connected to the motor bracket 13. The output end of the motor 14 passes through the motor bracket 13 and is fixedly connected to the fan blade 15. The motor 14 drives the fan blade 15 to rotate. The filter cup holder 16 is fixedly connected inside the filter tube 11. The filter cup holder 16 is used to install the filter cup 17. The filter cup 17 is fitted inside the filter cup holder 16. The mesh size of the filter cup 17 is greater than that of the filter tube 11 and the filter cover 12.

[0027] In this embodiment, the filter tube 11 and filter cover 12 are used to filter large dust particles, and the filter cup 17 is used to filter small impurities. The motor 14 drives the fan blade 15 to rotate, which can blow out the dust. The filter cup 17 and filter cover 12 can be cleaned directly from the outside. Rotating the filter cover 12 drives the bristles 20 to rotate on the surface of the filter cup 17, thereby cleaning the filter cup 17. Shaking the device can clean the dust and avoid clogging. Example

[0028] Please see Figure 1 and Figure 3Embodiment 2 describes a fixing assembly 30 that includes a support tube 31 for mounting components. A sealing tile 33 is fitted to the lower end of the inner wall of the support tube 31. The sealing tile 33 ensures a sealed connection between the support tube 31 and the spacer 35. The spacer 35 is slidably and sealingly connected within the sealing tile 33, forming two chambers. A threaded sleeve 37 is fixedly connected to the upper end of the spacer 35. The threaded sleeve 37 moves on a threaded rod 36, causing the spacer 35 to move. The threaded sleeve 37 is threaded onto the lead screw 36, which is fixedly connected to the lower end of the oxygen sensor body 21. A lever 38 is provided on the outside of the threaded sleeve 37. The lever 38 drives the threaded sleeve 37 to rotate. The lever 38 passes through the groove 32 opened on the wall of the support tube 31. The upper end of the groove 32 has a stepped gradient structure to prevent the partition 35 from resetting. A rubber pad 34 is fixedly connected to the bottom end of the support tube 31. The rubber pad 34 fills the adhering material to prevent gaps. The rubber pad 34 has a certain degree of stickiness.

[0029] In this embodiment, the rubber pad 34 is attached to the surface of the object and pressed slightly to fill the gaps in the surface of the object, forming a sealed cavity. The lever 38 is rotated, and the lever 38 rotates in the lever groove 32. The rotation of the lever 38 drives the threaded sleeve 37 to rotate on the threaded rod 36, so that the spacer 35 rotates on the sealing tile 33. The sealed cavity is in a low-pressure state, which makes the fixing method of this device very convenient.

Claims

1. An oxygen sensor, comprising an oxygen sensor body (21), characterized in that: An air filter assembly (10) is fixedly sleeved on the upper end of the oxygen sensor body (21), and a fixing assembly (30) is fixedly connected to the lower end of the oxygen sensor. An air filter assembly (10) includes a filter tube (11), a filter cover (12) is rotatably connected to the upper end of the filter tube (11), a filter cup (17) is provided inside the filter tube (11), bristles (20) are attached to the outside of the filter cup (17), and a fan blade (15) is provided at the lower end of the filter tube (11).

2. An oxygen sensor according to claim 1, characterized in that: The filter cover (12) is fixedly connected to two connecting rods (18) at its lower end. The bristles (20) are fixedly connected to the inside of the connecting rods (18). The lower ends of the two connecting rods (18) are fixedly connected to a support ring (19).

3. An oxygen sensor according to claim 1, characterized in that: The bottom end of the filter tube (11) is fixedly connected to a motor bracket (13), and a motor (14) is fixedly connected to the motor bracket (13). The output end of the motor (14) is fixedly connected to a fan blade (15) through the motor bracket (13).

4. An oxygen sensor according to claim 1, characterized in that: A filter cup holder (16) is fixedly connected inside the filter tube (11), and the filter cup (17) is fitted inside the filter cup holder (16). The mesh count of the filter cup (17) is greater than that of the filter tube (11) and the filter cover (12).

5. An oxygen sensor according to claim 1, characterized in that: The fixing component (30) includes a support tube (31), a sealing tile (33) is sealed at the lower end of the inner wall of the support tube (31), a partition (35) is slidably sealed inside the sealing tile (33), and a threaded sleeve (37) is fixedly connected to the upper end of the partition (35).

6. An oxygen sensor according to claim 5, characterized in that: The threaded sleeve (37) is threaded onto the lead screw (36), which is fixedly connected to the lower end of the oxygen sensor body (21). A lever (38) is provided on the outside of the threaded sleeve (37).

7. An oxygen sensor according to claim 6, characterized in that: The lever (38) passes through the groove (32) opened on the wall of the support tube (31). The upper surface of the groove (32) has a stepped gradient structure. The bottom end of the support tube (31) is fixedly connected with a rubber pad (34).

Images