CN219798600U - Sensor protection device - Google Patents

Abstract

The utility model relates to a sensor protection device, which relates to the field of automobiles and engines, and comprises a protection structure for connecting a rubber pipe and a differential pressure pipeline and a clamp for fixing; one end of the protection structure is cylindrical with hollow inside, and the other end is in a horn mouth shape. The utility model can be additionally arranged to avoid the problem of burning the sensor in the using process.

Description

Sensor protection device

Technical Field

The utility model relates to the field of automobiles and engines, in particular to post-treatment differential pressure sensor protection.

Background

A plurality of pressure difference sensor waste gas impact damage cases appear on six-machine type markets of a manufacturer, and the analysis damage cause is that high-temperature gas impacts the sensor body, so that the high-temperature is burnt. At present, a pressure difference sensor is fixed on a metal pipeline on a post-treatment ladle by using a clamp, and when the situation of poor sealing occurs, the plastic pressure difference pipeline on the sensor is burnt out, so that the use of an end user is influenced, and higher after-sales expense is generated.

The main disadvantages of the prior art are as follows:

1) The clamp is required to be used for auxiliary sealing, consistency cannot be ensured during assembly or maintenance, and the situation of loose sealing is easy to occur;

2) Once the air leakage occurs, high-temperature waste gas directly impacts the differential pressure sensor body, so that the sensor is burnt;

3) The operation is inconvenient during maintenance, and the aftertreatment is generally installed at the bottom of a vehicle, and is difficult to detach and install.

Disclosure of Invention

The purpose of the utility model is that: a sensor protection device is provided, and a design part is added to avoid the burning problem of a differential pressure sensor in the use process.

In order to achieve the above purpose, the technical scheme of the utility model provides a sensor protection device, which comprises a protection structure for connecting a rubber pipe and a differential pressure pipeline, and a clamp for fixing; one end of the protection structure is cylindrical with hollow inside, and the other end is in a horn mouth shape.

Preferably, the end of the protective structure provided with the bell mouth shape faces the sensor.

Preferably, the protective structure is sleeved on the periphery of the differential pressure pipeline, and the rubber sleeve is sleeved on the periphery of the protective structure.

Preferably, the protective structure is of a stretchable material.

Preferably, the protective structure is made of a heat-resistant material.

In summary, the utility model has the following beneficial technical effects:

through installing the device of the utility model additional, when the clamp is loosened or damaged, high-temperature waste gas is prevented from directly impacting the sensor body, and the risk of damage to the sensor is reduced.

Drawings

FIG. 1 is a schematic view of a sensor protection device according to an embodiment 1 of the present utility model;

FIG. 2 is a schematic structural view of a protection structure in an embodiment 1 of a sensor protection device according to the present utility model;

fig. 3 is a schematic structural diagram of an embodiment 2 of a sensor protection device according to the present utility model.

Reference numerals: 1. a clamp; 2. a differential pressure sensor; 3. a protective structure; 4. a rubber tube.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The embodiment of the utility model discloses a sensor protection device which comprises a protection structure 3 connected with a rubber tube 4 and a differential pressure pipeline, wherein the protection structure 3, the rubber tube 4 and the differential pressure pipeline are fixed by adopting a clamp 1. The protection structure 3 is made of a telescopic heat-resistant material, the lower half part of the protection structure is cylindrical and hollow in the inside, the lower half part of the protection structure can tightly wrap the outside of a sensor pipeline, the upper half part of the protection structure is in a horn mouth shape, and high-temperature waste gas can impact the outside of the horn mouth when the gas leakage condition occurs, so that the high-temperature burnout of the sensor body is avoided. The protective structure 3 can drain the exhaust gas when the clamp 1 is loose so as to avoid directly striking the plastic body of the differential pressure sensor 2.

In this embodiment, the rubber tube 4 is disposed on the DPF for connecting the differential pressure sensor 2 and the DPF carrier pipe, and the differential pressure pipe is connected to the differential pressure sensor 2 for measuring the differential pressure at the front and rear ends of the DPF.

The utility model provides a protection design for the plastic shell of the sensor for measuring the pressure difference of high-temperature gas, and avoids thermal shock damage during gas leakage. The utility model is additionally arranged on a pipeline of the differential pressure sensor 2, and the clamp 1 is used for fixing the differential pressure sensor 2 and a connecting pipeline. When the air leakage occurs, the high-temperature gas can impact the heat-resistant material, so that the damage to the sensor body is avoided.

The whole protection structure 3 is formed by combining a cylindrical shape and a bell mouth shape, the inside of the protection structure is hollow, the used flexible temperature-resistant material is required to have an inner diameter slightly smaller than the outer diameter of the sensor when being matched with the sensor, and the part is convenient to fasten on the surface of the sensor; the present utility model is applicable to all components requiring thermal shock protection, and is not limited to the differential pressure sensor 2.

In the current installation mode of the differential pressure sensor 2, once the clamp 1 is loosened, high-temperature waste gas directly impacts the sensor body to cause damage, and related problems in the market are common. The utility model can fundamentally avoid the impact of high-temperature gas on the sensor body during air leakage and effectively reduce the damage of parts; the sensor is additionally provided with the protection device when leaving the factory, and the existing assembly fastening mode is not affected. By additionally installing the utility model, when the pressure difference fault is reported when the vehicle has air leakage, the sensor body is not damaged. The structure effectively avoids the thermal shock damage failure of the differential pressure sensor 2, and can be used and popularized in relevant scenes.

Example 2:

the utility model is not limited to the protection of the differential pressure sensor 2, and other components with high-temperature damage risk are applicable. Such as sensors for monitoring EGR exhaust gas flow, etc., are used in high temperature exhaust gas environments. As shown in figure 2, the device is additionally arranged to prevent high-temperature waste gas from directly impacting the sensor body so as to prevent damage.

Finally, it should be noted that: the foregoing description of the preferred embodiments of the present utility model is not intended to be limiting, but rather, although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims (5)

1. A sensor protection device, characterized in that: comprises a protection structure (3) for connecting a rubber pipe (4) and a differential pressure pipeline and a clamp (1) for fixing; one end of the protection structure (3) is cylindrical with hollow inside, and the other end is in a horn mouth shape.

2. A sensor protection device according to claim 1, characterized in that: one end of the protection structure (3) provided with a horn mouth shape faces to the sensor.

3. A sensor protection device according to claim 1, characterized in that: the protection structure (3) is sleeved on the periphery of the differential pressure pipeline, and the rubber tube (4) is sleeved on the periphery of the protection structure (3).

4. A sensor protection device according to claim 1, characterized in that: the protection structure (3) is made of telescopic materials.

5. A sensor protection device according to claim 1, characterized in that: the protection structure (3) is made of heat-resistant materials.