Protection device suitable for exhaust temperature sensor

Abstract

The utility model relates to a protection device suitable for an exhaust temperature sensor, which comprises a sensor probe and a sensor connecting wire, one end of the sensor connecting wire is provided with a bare wire, and the other end of the sensor connecting wire is inserted and fixed in an electric plug; a lead is arranged on the sensor probe, a connecting sleeve is arranged at the tail end of the lead, a bare wire on the sensor wiring is inserted into the connecting sleeve and is electrically connected with the lead, the connecting sleeve is fixedly connected with the bare wire through a pressing buckle, and an annular pressing buckle groove is formed in the outer wall of the connecting sleeve; a protection pipe sleeve is sleeved on the connecting sleeve of the lead, one end of the protection pipe sleeve is sleeved on the sensor connecting wire, an omega-shaped toggle clip is sleeved on the protection pipe sleeve at the position of the pressing buckle groove, and the protection pipe sleeve is clamped and fixed between the inner wall of the toggle clip and the bottom surface of the pressing buckle groove. The protection pipe sleeve and the heat insulation telescopic sleeve are additionally arranged to protect the portion, where internal wires are prone to being exposed, of the sensor wiring, and the phenomenon of fusing caused by the exposed wires can be effectively avoided.

Description

Technical field:

[0001] The utility model relates to the technical field of exhaust temperature sensors, and more specifically to a protection device suitable for exhaust temperature sensors. Background technology:

[0002] With the mandatory implementation of the National IV emission standard, and the upcoming National V and National VI emission standards, automobile companies must take measures to reduce emissions. Domestically, EGR (exhaust gas recirculation system), DOC (oxidation catalytic converter), POC (particulate oxidation purifier), SCR (urea injection system) and DPF (particulate trap) are mainly used; all of them need to monitor the exhaust temperature and feed the data back to the ECU in real time. The ECU will process the exhaust gas according to the corresponding plan to meet the corresponding emission standards, so exhaust temperature sensors are needed for real-time monitoring. At present, the exhaust temperature sensor is installed close to the post-processing components, the temperature is relatively high, and after the installation is bent, the insulation sleeve is offset. The offset position is mainly at the connection between the sensor probe lead and the wiring, and the connection between the wiring and the power plug, such as Figure 1 As shown in the figure, there is a gap between the sensor probe lead and the wiring, which cannot completely cover the internal wires, and the probability of the internal wires melting is greatly increased. Therefore, it is necessary to design a protection structure to reduce the phenomenon of internal wires melting. Utility model content:

[0003] The purpose of the utility model is to address the deficiencies of the prior art and provide a protection device suitable for an exhaust temperature sensor, which adds a protective tube sleeve and a heat-insulating telescopic sleeve to protect the parts of the sensor wiring that are prone to causing internal wire exposure, and can effectively avoid the phenomenon of melting due to the exposure of the wire.

[0004] A protective device suitable for an exhaust temperature sensor comprises a sensor probe and a sensor wiring, wherein one end of the sensor wiring is provided with a bare wire and the other end is plugged and fixed in an electrical plug; the sensor probe is provided with a lead wire, the end of the lead wire is provided with a connecting sleeve, the bare wire on the sensor wiring is inserted in the connecting sleeve and electrically connected to the lead wire, the connecting sleeve is fixedly connected to the bare wire through a buckle, and an annular buckle groove is formed on the outer wall of the connecting sleeve; a protective sleeve is inserted and sleeved on the connecting sleeve of the lead wire, one end of the protective sleeve is inserted and sleeved on the sensor wiring, an "Ω"-shaped clip is sleeved on the protective sleeve at the buckle groove, and the protective sleeve is clamped and fixed between the inner wall of the clip and the bottom surface of the buckle groove;

[0005] The end of the sensor wiring close to the power plug is sleeved with a heat-insulating expansion sleeve, the heat-insulating expansion sleeve includes a straight tube-shaped connecting pipe that is inserted on the sensor wiring, one end of the connecting pipe is formed with a bellows, the end of the bellows is formed with a connecting sleeve, the connecting sleeve is arranged on the power plug, the end of the connecting sleeve is formed with a positioning sleeve with an L-shaped cross-section, a cable tie is inserted on the positioning sleeve, and the positioning sleeve is fixedly connected to the power plug through the cable tie.

[0006] Preferably, the inner diameter of the protective sleeve is equal to the diameter of the outer wall of the connecting sleeve on the lead, the diameter of the outer wall of the connecting sleeve is larger than the diameter of the outer wall of the sensor wiring, and one end of the protective sleeve is formed with a shrinkage, and the inner circle of the shrinkage presses against the outer wall of the sensor wiring.

[0007] Preferably, the length of the protective sleeve is greater than the length of the connecting sleeve on the lead.

[0008] Preferably, the inner diameter of the connecting sleeve on the thermal insulation expansion sleeve is larger than the inner diameter of the connecting pipe, and a conical transition pipe is formed between the connecting sleeve and the corrugated pipe.

[0009] Preferably, the inner diameter of the connecting pipe is equal to the diameter of the outer wall of the sensor connection.

[0010] The beneficial effects of the utility model are:

[0011] The present invention adds a protective tube sleeve and a heat-insulating expansion sleeve to protect the parts of the sensor wiring that are prone to causing the internal wires to be exposed, which can effectively avoid the phenomenon of fusing due to the exposed wires. Description of the drawings:

[0012] Figure 1 This is a schematic diagram of the structure of the utility model showing an internal wire between the wiring and the lead wire;

[0013] Figure 2 It is a schematic diagram of the structure of the utility model;

[0014] In the figure: 1. sensor probe; 11. lead wire; 12. connecting sleeve; 2. power plug; 3. sensor wiring; 31. bare wire; 4. thermal insulation expansion sleeve; 41. connecting sleeve; 42. positioning sleeve; 43. corrugated tube; 44. connecting pipe; 5. cable tie; 6. protective tube sleeve; 7. clip. Specific implementation method:

[0015] Example: See Figure 1 , 2As shown, a protection device suitable for an exhaust temperature sensor comprises a sensor probe 1 and a sensor wiring 3, wherein one end of the sensor wiring 3 is provided with a bare wire 31, and the other end is plugged and fixed in an electrical plug 2; the sensor probe 1 is provided with a lead wire 11, and the end of the lead wire 11 is provided with a connecting sleeve 12, the bare wire 31 on the sensor wiring 3 is inserted in the connecting sleeve 12 and electrically connected to the lead wire 11, the connecting sleeve 12 is fixedly connected to the bare wire 31 by a buckle, and an annular buckle groove is formed on the outer wall of the connecting sleeve 12; a protective sleeve 6 is inserted and sleeved on the connecting sleeve 12 of the lead wire 11, and one end of the protective sleeve 6 is inserted and sleeved on the sensor wiring 3, and an "Ω"-shaped clip 7 is sleeved on the protective sleeve 6 at the buckle groove, and the protective sleeve 6 is clamped and fixed between the inner wall of the clip 7 and the bottom surface of the buckle groove;

[0016] The end of the sensor wiring 3 close to the power plug 2 is sleeved with a heat-insulating expansion sleeve 4, the heat-insulating expansion sleeve 4 includes a straight tube-shaped connecting pipe 44 that is sleeved on the sensor wiring 3, one end of the connecting pipe 44 is formed with a bellows 43, the end of the bellows 43 is formed with a connecting sleeve 41, the connecting sleeve 41 is sleeved on the power plug 2, the end of the connecting sleeve 41 is formed with a positioning sleeve 42 with an L-shaped cross-section, the positioning sleeve 42 is sleeved with a cable tie 5, and the positioning sleeve 42 is fixedly connected to the power plug 2 through the cable tie 5; the protective tube sleeve 6 and the heat-insulating expansion sleeve 4 are both made of heat-resistant and heat-insulating materials.

[0017] The inner diameter of the protective tube sleeve 6 is equal to the diameter of the outer wall of the connecting sleeve 12 on the lead 11. The diameter of the outer wall of the connecting sleeve 12 is larger than the diameter of the outer wall of the sensor wiring 3. One end of the protective tube sleeve 6 is formed with a shrinkage, and the inner circle of the shrinkage is pressed against the outer wall of the sensor wiring 3.

[0018] The length of the protection sleeve 6 is greater than the length of the connecting sleeve 12 on the lead 11 .

[0019] The inner diameter of the connecting sleeve 41 on the heat-insulating expansion sleeve 4 is larger than the inner diameter of the connecting pipe 44 , and a conical transition pipe is formed between the connecting sleeve 41 and the corrugated pipe 43 .

[0020] The inner diameter of the connecting pipe 44 is equal to the diameter of the outer wall of the sensor connection 3 .

[0021] Working principle: The utility model is a protection device suitable for exhaust temperature sensors, which are mainly provided with a protection sleeve 6 and a heat-insulating expansion sleeve 4 at both ends of the sensor wiring 3, and the internal wires are protected by the protection sleeve 6 and the heat-insulating expansion sleeve 4; and the protection sleeve 6 and the heat-insulating expansion sleeve 4 are fixedly connected by a clip 7 and a cable tie 5, respectively, and will not be displaced, thereby effectively preventing the internal wires of the exhaust temperature sensor from being exposed.

[0022] The embodiments are used to illustrate the present invention, but not to limit the present invention. Any person skilled in the art may modify the embodiments without violating the spirit and scope of the present invention, and therefore the scope of protection of the present invention shall be as set forth in the claims of the present invention.

Claims

1. A protection device suitable for an exhaust temperature sensor, comprising a sensor probe (1) and a sensor wiring (3), wherein one end of the sensor wiring (3) is provided with a bare wire (31) and the other end is plugged and fixed in an electrical plug (2); the sensor probe (1) is provided with a lead wire (11), the end of the lead wire (11) is provided with a connecting sleeve (12), the bare wire (31) on the sensor wiring (3) is inserted in the connecting sleeve (12) and is electrically connected to the lead wire (11), the connecting sleeve (12) is fixedly connected to the bare wire (31) by a buckle, and an annular buckle groove is formed on the outer wall of the connecting sleeve (12); Features: A protective sleeve (6) is inserted into the connecting sleeve (12) of the lead wire (11), one end of the protective sleeve (6) is inserted into the sensor wiring (3), and an "Ω"-shaped clamp (7) is provided on the protective sleeve (6) at the buckle groove, and the protective sleeve (6) is clamped and fixed between the inner wall of the clamp (7) and the bottom surface of the buckle groove; The end of the sensor wiring (3) close to the power plug (2) is sleeved with a heat-insulating expansion sleeve (4), the heat-insulating expansion sleeve (4) comprises a straight tube-shaped connecting pipe (44) sleeved on the sensor wiring (3), one end of the connecting pipe (44) is formed with a bellows (43), the end of the bellows (43) is formed with a connecting sleeve (41), the connecting sleeve (41) is sleeved on the power plug (2), the end of the connecting sleeve (41) is formed with a positioning sleeve (42) with an L-shaped cross-section, a cable tie (5) is sleeved on the positioning sleeve (42), and the positioning sleeve (42) is fixedly connected to the power plug (2) through the cable tie (5).

2. A protection device for an exhaust temperature sensor according to claim 1, Features: The inner diameter of the protective sleeve (6) is equal to the diameter of the outer wall of the connecting sleeve (12) on the lead wire (11), the diameter of the outer wall of the connecting sleeve (12) is larger than the diameter of the outer wall of the sensor wiring (3), and one end of the protective sleeve (6) is formed with a constriction, and the inner circle of the constriction is pressed against the outer wall of the sensor wiring (3).

3. A protection device for an exhaust temperature sensor according to claim 2, Features: The length of the protective sleeve (6) is greater than the length of the connecting sleeve (12) on the lead wire (11).

4. A protection device for an exhaust temperature sensor according to claim 1, Features: The inner diameter of the connecting sleeve (41) on the heat-insulating expansion sleeve (4) is larger than the inner diameter of the connecting pipe (44), and a conical transition pipe is formed between the connecting sleeve (41) and the corrugated pipe (43).

5. A protection device for an exhaust temperature sensor according to claim 4, Features: The inner diameter of the connecting pipe (44) is equal to the diameter of the outer wall of the sensor connection (3).

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