Nitrogen-oxygen sensor with gas inlet protection function

Abstract

The utility model relates to the technical field of nitrogen-oxygen sensors, in particular to a nitrogen-oxygen sensor with gas inlet protection, which comprises a nitrogen-oxygen sensor body, a gas inlet protection device, a gas inlet protection device and a gas outlet protection device, the sleeve sleeves the gas inlet end of the nitrogen-oxygen sensor body, and a slot is formed in the outer wall of the sleeve in a penetrating manner; the driving ring is rotationally arranged on the sleeve in a sleeving manner; the elastic block is fixed on the driving ring and can be inserted into the sleeve through the slot; the lap joint block is fixed on the inner wall of the sleeve and is staggered from the slot in position; and the filter screen is arranged between the lap joint block and the slot and can be limited by the lap joint block and the elastic block. The device has the effect that the filter screen is convenient to disassemble and replace.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of nitrogen oxygen sensors, in particular to a nitrogen oxygen sensor with air inlet protection. BACKGROUND

[0002] A nitrogen oxygen sensor (NOx Sensor), also known as a nitrogen oxide sensor, is a sensor used to detect and measure nitrogen oxide (NOx) emissions in exhaust gas. Nitrogen oxides are atmospheric pollutants that are harmful to the environment and human health, so nitrogen oxygen sensors play an important role in vehicle emission control systems, especially in diesel and gasoline vehicles, to meet increasingly stringent emission standards.

[0003] At present, the nitrogen oxygen sensor needs to collect exhaust gas during use, and the exhaust gas often contains a large number of solid particles, which can easily cause the nitrogen oxygen sensor to be blocked during long-term use.

[0004] The nitrogen oxygen sensor with air inlet protection disclosed in the Chinese utility model patent with the publication number CN214622555U adds a filter plate to filter the exhaust gas, thereby reducing the blocking of the nitrogen oxygen sensor, but the way of fixing the filter plate is relatively cumbersome and inconvenient for disassembly and replacement of the filter plate. SUMMARY

[0005] The purpose of the present application is to provide a nitrogen oxygen sensor with air inlet protection, which is convenient for disassembly and replacement of the filter screen.

[0006] The nitrogen oxygen sensor with air inlet protection provided by the present application adopts the following technical solution:

[0007] A nitrogen oxygen sensor with air inlet protection comprises:

[0008] A nitrogen oxygen sensor body;

[0009] A sleeve is sleeved on the air inlet end of the nitrogen oxygen sensor body, and an insertion slot is formed through the outer wall of the sleeve;

[0010] A drive ring is rotatably sleeved on the sleeve;

[0011] An elastic block is fixed on the drive ring and can be inserted into the sleeve through the insertion slot;

[0012] A lap block is fixed on the inner wall of the sleeve and is staggered with the position of the insertion slot;

[0013] A filter screen is arranged between the lap block and the insertion slot and can be limited by the lap block and the elastic block.

[0014] Optionally, the driving ring is fixedly connected with an elastic protrusion, and the sleeve is provided with a limiting groove matched with the elastic protrusion; when the elastic block is inserted into the sleeve, the elastic protrusion is inserted into the limiting groove.

[0015] Optionally, one end of the elastic protrusion inserted into the limiting groove is provided with a spherical surface.

[0016] Optionally, the elastic block is fixedly connected with a first magnet, and the sleeve is fixedly connected with a second magnet; when the elastic block is pulled out of the sleeve, the first magnet and the second magnet are attracted to each other.

[0017] Optionally, the sleeve is provided with an annular groove, the annular groove is communicated with the insertion groove, and the driving ring is rotatably arranged in the annular groove.

[0018] Optionally, a plurality of elastic blocks are arranged, the plurality of elastic blocks are uniformly distributed along a circumference of the sleeve, and the insertion groove is provided with a plurality of insertion grooves corresponding to the plurality of elastic blocks.

[0019] The application is fixed by cooperation of the driving ring and the elastic block. When the filter screen needs to be fixed, the driving ring is only rotated, the elastic block is inserted into the sleeve, the elastic block and the abutting block clamp the filter screen, the filter screen is fixed, and the filter screen is only reversed and inserted into the insertion groove, so that the filter screen is conveniently and quickly installed and disassembled. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structure schematic view of a nitrogen oxygen sensor with air inlet protection according to an embodiment of the application.

[0021] Figure 2 is a partial sectional structure schematic view of a nitrogen oxygen sensor with air inlet protection according to an embodiment of the application.

[0022] Figure 3 is a structure schematic view of a sleeve according to an embodiment of the application.

[0023] Figure 4 is a structure schematic view of a driving ring according to an embodiment of the application.

[0024] In the figure, 1 is a nitrogen oxygen sensor body; 2 is a sleeve; 21 is an annular groove; 22 is an insertion groove; 23 is a limiting groove; 24 is a positioning groove; 3 is a filter screen; 4 is a driving ring; 41 is an elastic protrusion; 5 is an elastic block; 6 is an overlapping block; 7 is a first magnet; 8 is a second magnet. DETAILED DESCRIPTION

[0025] The following will be described in detail with reference to the accompanying drawings. Figure 1 - the accompanying drawings Figure 4 The application will be further described in detail.

[0026] A nitrogen oxygen sensor with air inlet protection, referring to Figure 1 and Figure 2 , including nitrogen oxygen sensor body 1, sleeve 2 and filter screen 3, there is an air inlet end on the nitrogen oxygen sensor body 1, the gas enters the nitrogen oxygen sensor body 1 from the air inlet end and is detected by the nitrogen oxygen sensor body 1.

[0027] Further, the air inlet end of the nitrogen oxygen sensor body 1 is inserted into the sleeve 2, the filter screen 3 is installed in the sleeve 2, the gas first enters the sleeve 2 and is filtered by the filter screen 3, and the filtered gas enters the nitrogen oxygen sensor through the air inlet end of the nitrogen oxygen sensor body 1 for detection. By setting the filter screen 3, the gas is filtered, reducing the situation that solid particles in the gas block the air inlet end of the nitrogen oxygen sensor body 1.

[0028] Referring to Figure 3 and Figure 4 , further, the sleeve 2 is rotatably sleeved with a driving ring 4, the inner wall of the driving ring 4 is fixedly connected with an elastic block 5, the sleeve 2 is provided with a slot 22 penetratingly formed on the outer wall, the inner wall of the slot 22 is provided in a slope, the sleeve 2 is fixedly connected with a lap block 6, and the lap block 6 and the slot 22 are staggered with each other. In this embodiment, the lap block 6 is annularly arranged to increase the supporting effect of the filter screen 3.

[0029] When installing the filter screen 3, first place the filter screen 3 on the lap block 6, then rotate the driving ring 4, make the elastic block 5 abut against the inner wall of the slot 22, and the elastic block 5 is elastically deformed under the guidance of the inner wall of the slot 22, so that the elastic block 5 is inserted into the sleeve 2 and abuts against one side of the filter screen 3 away from the lap block 6, thereby fixing the filter screen 3 in the sleeve 2. When it is necessary to disassemble the filter screen 3, rotate the driving ring 4 in the opposite direction, so that the elastic block 5 is completely inserted into the slot 22, thereby releasing the restriction of the filter screen 3, at this time the filter screen 3 can be disassembled for cleaning and replacement.

[0030] Further, the sleeve 2 is provided with a ring groove 21 on the outer wall, the driving ring 4 is rotatably arranged in the ring groove 21, the ring groove 21 is communicated with the slot 22, and the movement of the driving ring 4 along the axis direction of the sleeve 2 is limited by the ring groove 21, thereby ensuring the rotation stability of the driving ring 4.

[0031] Further, the elastic block 5 is provided with a plurality of elastic blocks 5, the plurality of elastic blocks 5 are evenly arranged around the driving ring 4, the slot 22 is provided with a plurality of slots 22, and the plurality of slots 22 and the plurality of elastic blocks 5 are one-to-one corresponding. When the driving ring 4 is rotated, the plurality of elastic blocks 5 are inserted into the sleeve 2 at the same time, and the filter screen 3 is limited, thereby ensuring the installation stability of the filter screen 3.

[0032] Further, the driving ring 4 is fixedly connected with elastic protrusions 41, and the sleeve 2 is provided with limiting grooves 23 matched with the elastic protrusions 41, i.e. the limiting grooves 23 are arranged on the inner wall of the ring groove 21. When the elastic blocks 5 are inserted into the sleeve 2, the elastic protrusions 41 are inserted into the limiting grooves 23. Specifically, one elastic protrusion 41 is arranged at the position of each elastic block 5, and each elastic protrusion 41 corresponds to one limiting groove 23. In this embodiment, the driving ring 4 is made of elastic material, for example, the elastic protrusions 41, the elastic blocks 5 and the driving ring 4 are all made of rubber.

[0033] In the initial stage, the elastic protrusions 41 abut against the inner wall of the ring groove 21, at this time, the elastic protrusions 41 and the driving ring 4 are elastically deformed. When it is needed to fix the filter screen 3, the driving ring 4 is rotated, so that the elastic blocks 5 are inserted into the sleeve 2, at this time, the elastic protrusions 41 are in position with the limiting grooves 23, the elastic protrusions 41 and the driving ring 4 are restored, so that the elastic protrusions 41 are inserted into the limiting grooves 23, thereby limiting the rotation of the driving ring 4.

[0034] When it is needed to disassemble the filter screen 3, the driving ring 4 is rotated, so that the elastic protrusions 41 are elastically deformed, thereby making the elastic protrusions 41 separate from the limiting grooves 23, and making the elastic blocks 5 slide into the insertion grooves 22 completely, thereby releasing the limiting of the filter screen 3.

[0035] Further, the inner wall of the ring groove 21 is further provided with positioning grooves 24, when the elastic blocks 5 are completely inserted into the insertion grooves 22, the elastic protrusions 41 are inserted into the positioning grooves 24, at this time, the driving ring 4 and the elastic protrusions 41 are in the restored state, so as to reduce the duration of the continuous deformation of the driving ring 4 and the elastic protrusions 41, and ensure the service life of the driving ring 4 and the elastic protrusions 41.

[0036] Further, one end of the elastic protrusion 41 inserted into the limiting groove 23 is provided with a spherical surface. By providing the spherical surface, when it is needed to rotate the driving ring 4, the elastic protrusion 41 can be more easily slid out of the limiting groove 23 through the guiding effect of the spherical surface, thereby facilitating the unlocking of the driving ring 4.

[0037] Referring to Figure 2 Further, the elastic blocks 5 are fixedly connected with first magnets 7, and the sleeve 2 is fixedly connected with second magnets 8, i.e. the second magnets 8 are fixed on the inner wall of the insertion grooves 22. When the elastic blocks 5 are completely inserted into the insertion grooves 22, i.e. the sleeve 2 is pulled out, the first magnets 7 and the second magnets 8 are attracted to each other, thereby further limiting the rotation of the driving ring 4, and reducing the situation that the driving ring 4 is automatically rotated due to other environmental factors.

[0038] The embodiments of the present application are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, wherein the same parts are denoted by the same reference numerals. Therefore, any equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A nitrogen oxygen sensor with air intake protection, characterized in that, The utility model relates to a nitrogen oxygen sensor body (1);Sleeve (2) is set to the air inlet end of nitrogen oxygen sensor body (1), the sleeve (2) outer wall is equipped with the slot (22) through, drive ring (4) is rotatably set on sleeve (2), elastic block (5) is fixed on drive ring (4) and can be inserted into sleeve (2) through slot (22), lap block (6) is fixed on the inner wall of sleeve (2) and is mutually staggered with the position of slot (22), filter screen (3) is arranged between lap block (6) and slot (22) and can be limited by lap block (6) and elastic block (5). The utility model discloses a nitrogen oxygen sensor body (1);Sleeve (2) is set to the air inlet end of nitrogen oxygen sensor body (1), the sleeve (2) outer wall is equipped with the slot (22) through, drive ring (4) is rotatably set on sleeve (2), elastic block (5) is fixed on drive ring (4) and can be inserted into sleeve (2) through slot (22), lap block (6) is fixed on the inner wall of sleeve (2) and is mutually staggered with the position of slot (22), filter screen (3) is arranged between lap block (6) and slot (22) and can be limited by lap block (6) and elastic block (5). The utility model discloses a nitrogen oxygen sensor body (1);Sleeve (2) is set to the air inlet end of nitrogen oxygen sensor body (1), the sleeve (2) outer wall is equipped with the slot (22) through, drive ring (4) is rotatably set on sleeve (2), elastic block (5) is fixed on drive ring (4) and can be inserted into sleeve (2) through slot (22), lap block (6) is fixed on the inner wall of sleeve (2) and is mutually staggered with the position of slot (22), filter screen (3) is arranged between lap block (6) and slot (22) and can be limited by lap block (6) and elastic block (5). The utility model discloses a nitrogen oxygen sensor body (1);Sleeve (2) is set to the air inlet end of nitrogen oxygen sensor body (1), the sleeve (2) outer wall is equipped with the slot (22) through, drive ring (4) is rotatably set on sleeve (2), elastic block (5) is fixed on drive ring (4) and can be inserted into sleeve (2) through slot (22), lap block (6) is fixed on the inner wall of sleeve (2) and is mutually staggered with the position of slot (22), filter screen (3) is arranged between lap block (6) and slot (22) and can be limited by lap block (6) and elastic block (5). The utility model discloses a nitrogen oxygen sensor body (1);Sleeve (2) is set to the air inlet end of nitrogen oxygen sensor body (1), the sleeve (2) outer wall is equipped with the slot (22) through, drive ring (4) is rotatably set on sleeve (2), elastic block (5) is fixed on drive ring (4) and can be inserted into sleeve (2) through slot (22), lap block (6) is fixed on the inner wall of sleeve (2) and is mutually staggered with the position of slot (22), filter screen (3) is arranged between lap block (6) and slot (22) and can be limited by lap block (6) and elastic block (5). ​ ​ 2. The nitrogen oxide sensor with air intake protection according to claim 1, characterized in that ​ 3. The nitrogen oxide sensor with air intake protection according to claim 2, characterized in that ​ 4. The nitrogen oxide sensor with air intake protection according to any one of claims 1 to 3, characterized in that ​ 5. The nitrogen oxide sensor with air intake protection according to claim 1, characterized in that ​ 6. The nitrogen oxide sensor with air intake protection according to claim 1, characterized in that ​

Images