Sensor waterproof device and exhaust pipe with sensor waterproof device

Abstract

The utility model provides a waterproof device for a sensor, the waterproof device for the sensor is a shell with a hollow structure, the side wall of the shell is provided with at least one side hole, and the side hole is used for gas to flow in; one end of the shell is used for being connected with an exhaust pipe, the other end of the shell is provided with at least one bottom face hole, and the bottom face holes are used for gas to flow out. The sensor waterproof device provided by the embodiment of the utility model not only can effectively prevent the ceramic body at the detection end of the oxygen sensor from losing efficacy when encountering water, but also can ensure that the detection end of the oxygen sensor can collect gas in a mainstream area, ensures the sampling accuracy of the sensor, and is simple in structure, low in cost and easy to produce in batches.

Description

Technical Field

[0001] The utility model belongs to the technical field of oxygen sensor waterproofing, in particular to a sensor waterproofing device and an exhaust pipe with the sensor waterproofing device. Background Art

[0002] The walls of automobile exhaust pipes are equipped with oxygen sensors, which are used to detect the oxygen content in the exhaust mixture and provide feedback to the computer control unit to adjust the air-fuel ratio of the mixture in the automobile engine.

[0003] The measuring head of the oxygen sensor is generally a ceramic body. When the oxygen sensor is powered on, the temperature of the ceramic body can reach as high as 800°C. If water splashes or condenses in the exhaust pipe and flows to the surface of the oxygen sensor and comes into contact with the high-temperature ceramic, the ceramic body will easily crack when it encounters water, causing the oxygen sensor to fail and the air-fuel ratio of the engine mixture cannot be adjusted. This is especially true for vehicles working in harsh environments, which often need to be cleaned, and sensor failure due to water ingress often occurs.

[0004] Currently, many oxygen sensors in exhaust pipes are not equipped with waterproof devices, so it is necessary to design a waterproof device that can be used for oxygen sensors in exhaust pipes. Summary of the Invention

[0005] To address at least one technical problem in the prior art, the present invention provides a waterproof sensor device and an exhaust pipe equipped with the waterproof sensor device, which can effectively prevent the oxygen sensor detection end from failing when exposed to water and ensure the accuracy of sensor sampling. To achieve the above technical objectives, the present invention adopts the following technical solutions:

[0006] In a first aspect, an embodiment of the present invention provides a sensor waterproof device, which is a shell having a hollow structure, wherein at least one side hole is provided on a side wall of the shell, and the side hole is used for gas to flow in;

[0007] One end of the shell is used to be connected to the exhaust pipe, and the other end of the shell is provided with at least one bottom hole for gas to flow out.

[0008] Furthermore, the housing extends along a first direction, and includes:

[0009] an inlet section, the inlet section being cylindrical, a side wall of the inlet section being provided with at least one side hole, and one end of the inlet section being used for connection with the exhaust pipe;

[0010] The outlet section is conical, the cone bottom of the outlet section is fixedly connected and communicated with the other end of the inlet section, and the cone top of the outlet section is provided with at least one bottom hole.

[0011] Furthermore, the side wall of the inlet section is provided with a side hole, the cone top of the outlet section is the bottom hole, and the area of ​​the side hole is larger than the area of ​​the bottom hole.

[0012] In a second aspect, the present invention provides an exhaust pipe with a sensor waterproof device, including the sensor waterproof device described above, and further comprising:

[0013] A tube body, wherein a mounting hole is provided on a side wall of the tube body, and the tube body includes an air inlet end;

[0014] A sensor base, fixedly disposed in the mounting hole;

[0015] A sensor is fixedly connected to the sensor base, and one end of the sensor disposed in the tube is a detection end;

[0016] The sensor waterproof device is fixedly arranged in the mounting hole and sleeved with the sensor, and the side hole of the sensor waterproof device faces the air inlet end of the tube body.

[0017] Furthermore, a step is provided at one end of the sensor base close to the tube body, and the step is fixedly connected to the mounting hole of the tube body.

[0018] Furthermore, a height of the side hole along the first direction is smaller than a height between the mounting hole and the detection end of the sensor.

[0019] Furthermore, the sensor is provided with an external thread section, the sensor base is provided with an internal thread, and the sensor is threadedly connected to the sensor base.

[0020] Furthermore, a locking nut is provided on the external thread section, and a side of the locking nut close to the sensor base is fitted with a side of the sensor base close to the locking nut.

[0021] The beneficial effects of the technical solution provided by the embodiment of the utility model are:

[0022] (1) The sensor waterproof device provided in the embodiment of the present invention can not only effectively prevent the ceramic body of the oxygen sensor detection end from failing when it comes into contact with water, but also ensure that the oxygen sensor detection end can collect gas in the mainstream area, thereby ensuring the accuracy of sensor sampling. It has a simple structure, low cost, and is easy to mass produce.

[0023] (2) The sensor waterproof device provided in the embodiment of the present invention satisfies the sensor CFD evaluation index by adjusting the size between the side hole and the bottom hole to adapt to the layout requirements of the exhaust pipes of different vehicle models.

[0024] (3) The exhaust pipe with a sensor waterproof device provided in the embodiment of the present invention has a side hole of the sensor waterproof device facing the air inlet end, and the height of the side hole is less than the height between the inner wall of the exhaust pipe and the sensor detection end, thereby ensuring that the air flow can enter the sensor waterproof device, thereby ensuring the accuracy of the sensor detection, and also preventing the sensor detection end from being affected by water.

[0025] (4) The exhaust pipe with a sensor waterproof device provided in the embodiment of the present invention has a threaded connection between the oxygen sensor and the sensor base, and adopts a locking nut, which makes it easy to adjust the position of the oxygen sensor detection end in the sensor waterproof device, and is easy to install and disassemble, and easy to maintain later. The locking nut fits well with the sensor base, thereby improving the sealing of the exhaust pipe with the sensor waterproof device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of the sensor waterproof device in an embodiment of the present utility model.

[0027] Figure 2 This is an exploded view of an exhaust pipe with a sensor waterproof device in an embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] In the description of the embodiments of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal connections between two components; they can refer to wireless connections or wired connections. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0031] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] The embodiment of the present utility model provides a sensor waterproof device, which comprises a housing 1 having a hollow structure, wherein at least one side hole 11 is provided on a side wall of the housing 1, and the side hole 11 is used for gas to flow in;

[0033] One end of the shell 1 is used to be connected to the exhaust pipe, and the other end of the shell 1 is provided with at least one bottom hole 12 for gas to flow out.

[0034] like Figure 1 As shown, the sensor waterproof device is used to encase the sensor 5. The upper end of the housing 1 is fixedly connected to the exhaust pipe. The hollow portion of the housing 1 protects the sensor 5 from water. The side holes 11 and the bottom hole 12 ensure airflow, preventing the sensor waterproof device from becoming a dead zone. It should be noted that the side holes are for gas flow, and during installation, the side holes 11 of the housing 1 should be aligned with the incoming airflow.

[0035] The present application does not limit the specific configuration of the shell 1 , nor does it limit the shape and number of the side holes 11 on the side wall of the shell 1 and the shape and number of the bottom holes 12 on the other end of the shell 1 .

[0036] In a specific embodiment, the shell 1 is a hollow cuboid, the four side walls of the cuboid are provided with the side holes 11, the top of the cuboid is fixedly connected to the exhaust pipe, and the bottom of the cuboid is provided with a bottom hole 12.

[0037] In another specific embodiment, the shell 1 is a hollow cylinder with two side holes 11 provided on the side wall of the cylinder. The top of the cylinder is fixedly connected to the exhaust pipe, and the bottom of the cylinder is provided with two bottom holes 12.

[0038] In another specific embodiment, the housing 1 extends along a first direction A, and the housing 1 includes:

[0039] An inlet section 1a is cylindrical, and a side wall of the inlet section 1a is provided with at least one side hole 11. One end of the inlet section 1a is used for connection to an exhaust pipe;

[0040] The outlet section 1b is conical in shape, with the bottom of the outlet section 1b fixedly connected to and in communication with the other end of the inlet section 1a. The top of the outlet section 1b is provided with at least one bottom hole 12. It will be appreciated that the conical structure of the outlet section 1b can guide the gas, facilitating the gas in the housing 1 to flow out through the bottom hole 12.

[0041] In this embodiment, the number and size of the side holes 11 and the number and size of the bottom hole 12 are not limited. In one embodiment, the inlet section 1a is provided with two side holes 11, and the outlet section 1b is provided with one bottom hole 12, and the sum of the areas of the two side holes 11 is greater than the area of ​​the bottom hole 12.

[0042] In another embodiment, the side wall of the inlet section 1a is provided with a side hole 11 , the cone top of the outlet section 1b is the bottom hole 12 , and the area of ​​the side hole 11 is larger than that of the bottom hole 12 .

[0043] The air flow enters the shell 1 from the side hole 11 and flows out of the shell 1 from the bottom hole 12. The area of ​​the side hole 11 is larger than the area of ​​the bottom hole 12, which can ensure that there is a pressure difference in the air flow between the side hole 11 and the bottom hole 12, thereby ensuring that the gas has a higher flow rate.

[0044] In a second aspect, an embodiment of the present invention further provides an exhaust pipe with a sensor waterproof device 2, comprising the sensor waterproof device 2 described above, and further comprising:

[0045] A tube body 3, wherein a mounting hole 31 is provided on a side wall of the tube body 3, and the tube body 3 includes an air inlet end 3a;

[0046] The sensor base 4 is fixedly disposed in the mounting hole 31;

[0047] A sensor 5 is fixedly connected to the sensor base 4, and one end of the sensor 5 disposed in the tube 3 is a detection end 51;

[0048] The sensor waterproof device 2 is fixedly disposed in the mounting hole 31 and sleeved with the sensor 5 . The side hole 11 of the sensor waterproof device 2 faces the air inlet end 3 a of the tube body 3 .

[0049] In a specific embodiment, Figure 2As shown, the mounting hole 31 is provided above the tube body 3. The side hole 11 faces the air inlet end 3a of the tube body 3 and is oriented in the direction of the incoming airflow. This structure ensures that airflow can enter the sensor waterproof device 2 and flow out through the bottom hole 12, thereby ensuring that the detection end 51 of the sensor 5 can detect the airflow, thereby ensuring the accuracy of the detection of the sensor 5.

[0050] The sensor base 4 is fixedly disposed in the mounting hole 31 , and the sensor waterproof device 2 is also fixedly disposed in the mounting hole 31 . The fixed connection method is not limited, and can be, for example, welded.

[0051] During installation, first insert the sensor waterproof device 2 into the tube body 3 through the mounting hole 31, rotate the sensor waterproof device 2 so that the side hole 11 on the sensor waterproof device 2 faces the air inlet end 3a of the tube body 3, weld the upper end of the sensor waterproof device 2 to the mounting hole 31, then weld the lower end of the sensor base 4 to the mounting hole 31, and finally fix the sensor 5 on the sensor base 4 to complete the installation.

[0052] Furthermore, the sensor base 4 is provided with a step 41 at one end close to the tube body 3, and the step 41 is fixedly connected to the mounting hole 31 of the tube body 3. Figure 2 As shown, the lower end of the sensor base 4 is provided with the step 41 , and the step 41 facilitates quick positioning of the sensor base 4 and the mounting hole 31 , and is also beneficial for welding between the sensor base 4 and the mounting hole 31 .

[0053] Furthermore, the height of the side hole 11 along the first direction A is smaller than the height between the mounting hole 31 and the detection end 51 of the sensor 5 .

[0054] It can be understood that the air flow enters the tube body 3 from the air inlet end 3a. Since the side hole 11 on the sensor waterproof device 2 faces the incoming direction of the gas, the height of the side hole 11 is smaller than the height between the mounting hole 31 and the detection end 51 of the sensor 5. This can prevent the detection end 51 of the sensor 5 from being affected by water, protect the detection end 51 of the sensor 5, and extend the service life of the sensor 5.

[0055] The connection method between the sensor 5 and the sensor base 4 is not limited. In a specific embodiment, the sensor 5 and the sensor base 4 are welded.

[0056] In another specific embodiment, the sensor 5 is provided with an external thread segment, and the sensor base 4 is provided with an internal thread. The sensor 5 is threadedly connected to the sensor base 4. This connection method is conducive to the installation and disassembly of the sensor 5, facilitates subsequent maintenance, and facilitates the adjustment of the position of the detection end 51 of the sensor 5 in the sensor waterproof device 2, thereby improving the stability of the sensor 5 and the accuracy of detection.

[0057] Furthermore, a locking nut 6 is provided on the external thread section, and a side of the locking nut 6 close to the sensor base 4 is fitted with a side of the sensor base 4 close to the locking nut 6 .

[0058] like Figure 2 As shown, the locking nut 6 facilitates the installation of the sensor 5. During installation, the locking nut 6 on the sensor 5 is clamped by a tool until it is tightened, so that the lower surface of the positioning locking nut 6 is closely fitted with the upper surface of the sensor base 4, thereby improving the sealing of the exhaust pipe with the sensor waterproof device 2.

[0059] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to examples, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A waterproof sensor device, characterized in that: The sensor waterproof device is a shell (1) with a hollow structure, wherein at least one side hole (11) is provided on a side wall of the shell (1), and the side hole (11) is used for gas to flow in; One end of the shell (1) is used for connecting to an exhaust pipe, and the other end of the shell (1) is provided with at least one bottom hole (12), and the bottom hole (12) is used for gas outflow.

2. The waterproof sensor device according to claim 1, wherein: The housing (1) extends along a first direction (A), and the housing (1) comprises: An inlet section (1a), the inlet section (1a) is cylindrical, a side wall of the inlet section (1a) is provided with at least one side hole (11), and one end of the inlet section (1a) is used for connection to an exhaust pipe; An outlet section (1b) is conical, the cone bottom of the outlet section (1b) is fixedly connected to and communicates with the other end of the inlet section (1a), and the cone top of the outlet section (1b) is provided with at least one bottom hole (12).

3. The waterproof sensor device according to claim 2, wherein: The side wall of the inlet section (1a) is provided with a side hole (11), the cone top of the outlet section (1b) is the bottom hole (12), and the area of ​​the side hole (11) is larger than the area of ​​the bottom hole (12).

4. An exhaust pipe with a sensor waterproof device, characterized in that: The waterproof sensor device (2) according to any one of claims 1 to 3 further comprises: A tube body (3), wherein a mounting hole (31) is provided on a side wall of the tube body (3), and the tube body (3) includes an air inlet end (3a); A sensor base (4) is fixedly disposed in the mounting hole (31); A sensor (5) is fixedly connected to the sensor base (4), and one end of the sensor (5) disposed in the tube body (3) is a detection end (51); The sensor waterproof device (2) is fixedly arranged in the mounting hole (31) and sleeved with the sensor (5), and the side hole (11) of the sensor waterproof device (2) faces the air inlet end (3a) of the tube body (3).

5. The exhaust pipe with a sensor waterproof device (2) as claimed in claim 4, characterized in that: A step (41) is provided at one end of the sensor base (4) close to the tube body (3), and the step (41) is fixedly connected to the mounting hole (31) of the tube body (3).

6. The exhaust pipe with a sensor waterproof device (2) as claimed in claim 4, characterized in that: The height of the side hole (11) along the first direction (A) is smaller than the height between the mounting hole (31) and the detection end (51) of the sensor (5).

7. The exhaust pipe with a sensor waterproof device (2) as claimed in claim 4, characterized in that: The sensor (5) is provided with an external thread section, the sensor base (4) is provided with an internal thread, and the sensor (5) is threadedly connected to the sensor base (4).

8. The exhaust pipe with a sensor waterproof device (2) as claimed in claim 7, characterized in that: A locking nut (6) is also provided on the external thread section, and a side of the locking nut (6) close to the sensor base (4) is in contact with a side of the sensor base (4) close to the locking nut (6).

Images