A sensor anti-high temperature radiation device

Abstract

The present invention relates to the technical field of engine parts, and in particular to a sensor high-temperature radiation protection device, including a heat shield, the heat shield is constructed as a sheet metal structure, the heat shield includes an upwardly protruding temperature sensor compartment and a mounting plate connected below the temperature sensor compartment, the temperature sensor is arranged in the temperature sensor compartment, the mounting plate is provided with a first through hole, the sensor mounting seat is provided with a second through hole, and the first through hole and the second through hole match. The problem caused by the exhaust pipe envelope insulation method in the existing structure is solved, by installing a heat shield on the sensor toward the exhaust pipe, efficient and low-cost sensor high-temperature radiation protection is achieved, the heat energy of the exhaust pipe is prevented from radiating to the sensor, the temperature around the sensor is ensured to be within the normal use temperature, and the safe and reliable operation of the sensor is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of engine parts, and in particular to a high-temperature radiation protection device for a sensor. Background Art

[0002] In existing cars, engines are increasingly moving towards electrification and electronic control, and the use of sensors will also increase. However, the use of sensors has relatively strict requirements on the surrounding environment. Excessive temperature will cause sensor failure. The traditional sensor insulation method prevents heat energy from radiating to the sensor by enveloping the exhaust pipe. By enveloping and isolating the heated exhaust pipe, heat is prevented from being transferred to the sensor, thereby protecting the sensor from high-temperature radiation and keeping the ambient temperature around the sensor within a reasonable range, thereby effectively protecting the sensor.

[0003] For example, the Chinese patent CN206707820U discloses a natural gas engine exhaust pipe heat shield, the heat shield is arranged on the outer wall of the exhaust pipe body of the engine, the heat shield includes an inner heat insulation layer and an outer coating layer, the inner heat insulation layer is wrapped on the outer wall of the exhaust pipe body, the inner heat insulation layer is a ceramic fiber layer, the outer coating layer is coated on the outside of the inner heat insulation layer, the outer coating layer is an embossed aluminum plate layer, the outer coating layer is connected by rivets, and the outer surface of the outer coating layer is provided with a temperature sensor, and the temperature sensor is electrically connected to the temperature display. During the operation of the engine, the present invention can effectively reduce the temperature of the temperature field around the exhaust pipe, and intuitively understand the temperature of the surface of the heat shield, ensure the normal and safe operation of the engine and surrounding parts, and at the same time, ensure the overall noise reduction effect of the engine exhaust pipe heat shield, reduce the overall weight of the exhaust pipe heat shield, and improve the anti-vibration effect.

[0004] However, the above structure prevents heat from being transferred to the sensor by covering and isolating the heated exhaust pipe. However, this solution still has defects. For example, the structure is relatively complex and a thicker covering and heat insulation layer must be set on the outside of the exhaust pipe. The cost is high and the volume is large. The engine volume will increase, which is not conducive to the layout of the engine in the whole vehicle. Summary of the invention

[0005] The present invention provides a sensor high-temperature radiation protection device, which solves the problems caused by the exhaust pipe envelope insulation method in the existing structure. By installing a heat insulation cover on the sensor towards the exhaust pipe, efficient and low-cost sensor high-temperature radiation protection is achieved, and the heat energy of the exhaust pipe is prevented from being radiated to the sensor, ensuring that the temperature around the sensor is within the normal operating temperature, thereby ensuring the safe and reliable operation of the sensor.

[0006] The technical solution of the present invention is as follows: a sensor high-temperature radiation protection device, which is arranged between a temperature sensor and an exhaust pipe, the temperature sensor is installed on the upper part of an engine body through a sensor mounting seat, the exhaust pipe is arranged above the temperature sensor, and includes a heat insulation cover, the heat insulation cover is constructed as a sheet metal structure, the heat insulation cover includes an upwardly protruding temperature sensor compartment and a mounting plate connected to the outside of the temperature sensor compartment in the lower direction, the temperature sensor is arranged in the temperature sensor compartment, the mounting plate is provided with a first through hole, the sensor mounting seat is provided with a second through hole, and the first through hole and the second through hole match.

[0007] The present invention achieves efficient and low-cost protection of the sensor from high-temperature radiation by installing a heat shield on the sensor toward the exhaust pipe, preventing the heat energy of the exhaust pipe from radiating to the sensor, ensuring that the temperature around the sensor is within the normal operating temperature, and ensuring the safe and reliable operation of the sensor. The plate structure adopts a low-cost sheet metal part, which is formed by simple bending and processing, and has a compact and flexible structure in assembly, and is simple, easy and low-cost in manufacturing. It makes the whole vehicle layout more compact, releases the useful space of the car, and greatly reduces the manufacturing cost.

[0008] Preferably, the plane on which the mounting plate is located is arranged horizontally, which has a simple structure, is easy to install and has low cost.

[0009] Preferably, the mounting plates are arranged in pairs on both sides below the temperature sensor compartment, and a two-side connection method is adopted, so that the installation is more stable and reliable.

[0010] Preferably, the first through hole and the second through hole are both extended to the outside of the engine body and are suspended to facilitate heat dissipation under the sensor.

[0011] Preferably, the gap between the inner wall of the temperature sensor compartment and the outer envelope of the temperature sensor is 2-5 mm, which can ensure the insulation spacing of the temperature sensor and avoid direct contact between the temperature sensor and the heat insulation cover, while ensuring that the volume of the heat insulation cover is not too large and the structure is compact.

[0012] Preferably, the first through hole and the second through hole are connected by bolts, which has a simple structure, is easy to disassemble and assemble and maintain later, and has low cost.

[0013] Preferably, the temperature sensor compartment is constructed as an inverted U-shaped groove structure, that is, the temperature sensor compartment is an inverted long groove structure, plus the horizontal mounting plates on both sides below the temperature sensor compartment, the transverse cross-section of the entire heat insulation cover presents a "J" shape.

[0014] Preferably, the outer side edge of the mounting plate is provided with a chamfer, which is beneficial to reducing the volume and weight of the heat insulation cover and making the structure more compact.

[0015] Beneficial effects of the present invention:

[0016] 1. Eliminate the traditional exhaust pipe wrapping method and install a heat shield on the sensor facing the exhaust pipe to make the vehicle layout more compact and free up useful space in the car.

[0017] 2. The plate structure adopts low-cost sheet metal parts, which are made by simple bending processing, which greatly reduces the manufacturing cost.

[0018] 3. Use the sensor's mounting hole to install the heat shield, which is low-cost and can efficiently prevent heat radiation at will, ensuring that the temperature around the sensor is within the normal operating temperature and ensuring the safe and reliable operation of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a sensor high temperature radiation protection device described in the present invention.

[0020] Figure 2 It is a schematic structural diagram of the heat insulation cover of the present invention.

[0021] Figure 3 This is an overall installation structure diagram of a sensor high-temperature radiation protection device described in the present invention.

[0022] In the figure: 1-temperature sensor, 2-exhaust pipe, 3-sensor mounting seat, 301-second through hole, 4-engine body, 5-heat insulation cover, 501-temperature sensor compartment, 502-mounting plate, 503-first through hole. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0024] In the description of the present invention, it is necessary to understand that the terms "left", "right", "up", "down", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or structure referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0025] Embodiment 1:

[0026] A sensor high temperature radiation protection device, such as Figure 3 As shown, it is arranged between the temperature sensor 1 and the exhaust pipe 2. The temperature sensor 1 is installed on the upper part of the engine body 4 through the sensor mounting seat 3. The exhaust pipe 2 is arranged above the temperature sensor 1.

[0027] like Figure 1 and Figure 2 As shown, this embodiment includes a heat insulation cover 5, which is constructed as a sheet metal structure. The heat insulation cover 5 includes an upwardly protruding temperature sensor compartment 501 and a mounting plate 502 connected to the outside of the temperature sensor compartment 501 below. The temperature sensor 1 is arranged in the temperature sensor compartment 501, and a first through hole 503 is arranged on the mounting plate 502. The sensor mounting seat 3 is provided with a second through hole 301, and the first through hole 503 matches the second through hole 301.

[0028] In this embodiment, the heat shield 5 is installed on the sensor mounting base 3 by bolts passing through the first through hole 503 and the second through hole 301; when the engine is working, the exhaust pipe 2 radiates heat outward, including radiating heat to the temperature sensor 1 on the engine body 4. At this time, the heat shield 5 blocks the heat and reflects the heat on the side of the temperature sensor 1 facing the exhaust pipe 2, preventing the heat energy of the exhaust pipe 2 from radiating to the temperature sensor 1, ensuring that the temperature around the temperature sensor 1 is within the normal operating temperature, and ensuring the safe and reliable operation of the temperature sensor 1.

[0029] Embodiment 2:

[0030] like Figure 1 and Figure 2 As shown, a sensor high-temperature radiation protection device is arranged between a temperature sensor 1 and an exhaust pipe 2, wherein the temperature sensor 1 is mounted on the upper part of an engine body 4 through a sensor mounting seat 3, and the exhaust pipe 2 is arranged above the temperature sensor 1, and comprises a heat shield 5, wherein the heat shield 5 is constructed as a sheet metal structure, and the heat shield 5 comprises an upwardly protruding temperature sensor compartment 501 and a mounting plate 502 connected to the outside of the lower side of the temperature sensor compartment 501, wherein the temperature sensor 1 is arranged in the temperature sensor compartment 501, and a first through hole 503 is arranged on the mounting plate 502, and a second through hole 301 is arranged on the sensor mounting seat 3, and the first through hole 503 matches the second through hole 301.

[0031] like Figure 1 As shown, in this embodiment, the plane where the mounting plate 502 is located is horizontally arranged, and the structure is simple, easy to install, and low in cost.

[0032] like Figure 1 As shown, in this embodiment, the mounting plates 502 are arranged in pairs on both sides below the temperature sensor compartment 501, and a two-side connection method is adopted, so that the installation is more stable and reliable.

[0033] like Figure 1 and Figure 2As shown, in this embodiment, both the first through hole 503 and the second through hole 301 extend to the outside of the engine body 4 and are suspended to facilitate heat dissipation under the sensor.

[0034] In this embodiment, the gap between the inner wall of the temperature sensor compartment 501 and the outer envelope of the temperature sensor 1 is 2 mm. This size mainly ensures that the volume of the heat insulation cover 5 is not too large and the structure is compact, while avoiding direct contact between the temperature sensor 1 and the heat insulation cover 5.

[0035] like Figure 1 As shown, in this embodiment, the first through hole 503 and the second through hole 301 are connected by bolts, which has a simple structure, is easy to disassemble and assemble and maintain later, and has low cost.

[0036] like Figure 2 As shown, in this embodiment, the temperature sensor compartment 501 is constructed as an inverted U-shaped groove structure, that is, the temperature sensor compartment 501 is an inverted long groove structure, plus the horizontal mounting plates 502 on both sides below the temperature sensor compartment 501, the transverse cross-section of the entire heat insulation cover 5 presents a "J" shape.

[0037] like Figure 2 As shown, the outer side edge of the mounting plate 502 in this embodiment is provided with a chamfer, that is, the width is largest at the first through hole 503 and smallest at the edge, which can ensure the mounting strength and help reduce the volume and weight of the heat shield 5, and the structure is more compact.

[0038] Embodiment 3:

[0039] The difference between this embodiment and the above-mentioned embodiment 2 is that: in this embodiment, the gap between the inner wall of the temperature sensor compartment 501 and the outer envelope of the temperature sensor 1 is 5 mm, which mainly ensures the thermal insulation spacing of the temperature sensor 1, improves the thermal insulation performance, and does not make the size too large. The installation plate 502 is set as one, which is conducive to reducing costs.

Claims

1. A sensor high temperature radiation protection device, arranged between a temperature sensor (1) and an exhaust pipe (2), wherein the temperature sensor (1) is mounted on the upper part of an engine body (4) via a sensor mounting seat (3), and the exhaust pipe (2) is arranged above the temperature sensor (1), characterized in that: The invention comprises a heat shield (5), the heat shield (5) being constructed as a sheet metal structure, the heat shield (5) comprising an upwardly protruding temperature sensor chamber (501) and a mounting plate (502) connected to the outside of the lower side of the temperature sensor chamber (501), the temperature sensor (1) being arranged in the temperature sensor chamber (501), the mounting plate (502) being provided with a first through hole (503), the sensor mounting seat (3) being provided with a second through hole (301), the first through hole (503) and the second through hole (301) being matched; the mounting plates (502) being arranged in pairs at both sides below the temperature sensor chamber (501); the gap between the inner wall of the temperature sensor chamber (501) and the outside of the outer envelope of the temperature sensor (1) being 2 to 5 mm; the first through hole (503) and the second through hole (301) both extend to the outside of the engine body (4) and are arranged in mid-air.

2. A sensor high temperature radiation protection device according to claim 1, characterized in that: The plane on which the mounting plate (502) is located is arranged horizontally.

3. A sensor high temperature radiation protection device according to claim 1, characterized in that: The first through hole (503) and the second through hole (301) are fixed by bolt connection.

4. A sensor high temperature radiation protection device according to claim 3, characterized in that: The temperature sensor compartment (501) is constructed as an inverted U-shaped groove structure.

5. The sensor high temperature radiation protection device according to claim 3, characterized in that: The outer side edge of the mounting plate (502) is provided with a chamfer.

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