Exhaust temperature sensor protective sleeve

Abstract

The utility model discloses a protective sleeve for an exhaust temperature sensor, belongs to the technical field of temperature sensors, and solves the problem that the exhaust temperature sensor is directly mounted in an exhaust pipe, so that the exhaust temperature sensor is damaged. The exhaust temperature sensor protective sleeve comprises a first connecting pipe, a first mounting cavity is formed in the first connecting pipe, an internal thread A matched with an exhaust temperature sensor is arranged on the upper portion of the first mounting cavity, a second connecting pipe is arranged at one end of the first connecting pipe, a second mounting cavity is formed in the second connecting pipe, and the second connecting pipe is connected with the second mounting cavity. The first installation cavity is communicated with the second installation cavity, the other end of the second connection pipe is provided with a protection pipe communicated with the second connection pipe, the outer wall face of the second connection pipe is provided with an external thread matched with a threaded hole of an exhaust pipe, and the diameters of the first connection pipe, the second connection pipe and the protection pipe are sequentially reduced. According to the exhaust temperature sensor protective sleeve, the service life of the exhaust temperature sensor is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature sensors, and more specifically, it relates to a protection sleeve for an exhaust temperature sensor. Background Art

[0002] An exhaust temperature sensor is an important temperature measurement device. The exhaust temperature sensor can convert the temperature of an object into an electrical signal output or a voltage output, and is widely used in industrial production and the medical field. When the engine is running, the processed exhaust gas is discharged to the outside through the exhaust pipe. Since the exhaust gas discharged by the engine is high-temperature gas, it is necessary to monitor the temperature in the exhaust pipe in real time to avoid accidents.

[0003] Usually, the exhaust temperature sensor is directly installed on the exhaust pipe, and the end of the exhaust temperature sensor equipped with a probe is inserted into the exhaust pipe, so as to monitor the temperature in the exhaust pipe in real time. However, when the gas flow rate in the exhaust pipe is too fast or there are small-particle impurities in the exhaust pipe, it will damage the probe of the exhaust temperature sensor, resulting in inaccurate real-time monitoring of the exhaust pipe and extremely easy to cause safety accidents. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a protection sleeve for an exhaust temperature sensor aiming at the above-mentioned deficiencies of the prior art, which can effectively protect the exhaust temperature sensor and extend the service life of the exhaust temperature sensor.

[0005] The technical solution of the utility model is as follows: A protection sleeve for an exhaust temperature sensor includes a first connecting pipe. A first installation cavity is arranged inside the first connecting pipe. An internal thread A adapted to the exhaust temperature sensor is arranged at the upper part of the first installation cavity. One end of the first connecting pipe is provided with a second connecting pipe communicated with it. The other end of the second connecting pipe is provided with a protection pipe communicated with it. An external thread A adapted to the threaded hole of the exhaust pipe is arranged on the outer wall surface of the second connecting pipe. The diameters of the first connecting pipe, the second connecting pipe, and the protection pipe decrease in sequence.

[0006] As a further improvement, an arc-shaped wall is arranged at the lower part of the inner wall of the first installation cavity.

[0007] Furthermore, the protection pipe includes an upper protection pipe and a lower protection pipe. A first sinking groove is arranged at the end of the upper protection pipe far away from the first connecting pipe. An internal thread B is arranged inside the first sinking groove. An external thread B adapted to the internal thread B is arranged at one end of the lower protection pipe. The upper protection pipe and the lower protection pipe are connected by threads.

[0008] Further, one end of the first sink is provided with a second sink, the diameters of the first sink and the second sink decrease in sequence, one end of the lower protection tube close to the external thread B is provided with a fixed tube, the diameter of the fixed tube is adapted to the diameter of the second sink, and the fixed tube is movably inserted into the second sink.

[0009] Further, a sealing groove is provided in the second sink, and a sealing ring is provided in the sealing groove.

[0010] Further, an arc-shaped groove is provided at the bottom of the lower protection tube, and the arc-shaped groove is adapted to the probe of the exhaust temperature sensor.

[0011] Further, the first connecting tube, the second connecting tube, and the upper protection tube are of an integrally formed structure.

[0012] Beneficial effects

[0013] Compared with the prior art, the present utility model has the following advantages:

[0014] 1. For the exhaust temperature sensor protection sleeve of the present utility model, the exhaust temperature sensor is threadedly connected to the protection sleeve, and then the protection sleeve is installed in the exhaust pipe through threaded connection, so as to achieve the purpose of measuring the temperature of the internal cavity of the exhaust pipe. By adding a protection sleeve to the exhaust temperature sensor, the exhaust temperature sensor can be effectively protected and its service life can be extended.

[0015] 2. For the exhaust temperature sensor protection sleeve of the present utility model, through the threaded connection between the upper protection tube and the lower protection tube, the overall length of the protection tube can be adjusted according to the length of different models of exhaust temperature sensors, effectively improving the applicable range of the protection sleeve, and enabling the arc-shaped part to be closely attached to the probe of the exhaust temperature sensor, effectively improving the measurement accuracy of the exhaust temperature sensor. Description of the drawings

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is a schematic cross-sectional structural diagram of the present utility model;

[0018] Figure 3 is a schematic cross-sectional structural diagram of the upper protection tube of the present utility model;

[0019] Figure 4 is a schematic cross-sectional structural diagram of the lower protection tube of the present utility model.

[0020] Wherein: 1 - first connecting tube, 2 - second connecting tube, 3 - protection tube, 4 - installation cavity, 5 - arc-shaped groove, 6 - first sink, 7 - second sink, 8 - sealing groove, 9 - arc-shaped wall, 10 - fixed tube, 31 - upper protection tube, 32 - lower protection tube. Specific Embodiments

[0021] The following further describes the present utility model with reference to specific embodiments in the accompanying drawings.

[0022] Refer to Figures 1-4 , a temperature discharge sensor protection sleeve, including a first connecting pipe 1. A first installation cavity 4 is provided inside the first connecting pipe 1. The outer circumferential surface of the first connecting pipe 1 is hexagonal, which is convenient for using tools such as wrenches to install the protection sleeve on the exhaust pipe. The diameter of the lower part of the first connecting pipe 1 is smaller than that of the upper part of the first connecting pipe, which can reduce the cost of materials required for production and play a role in transition at the same time; an internal thread A adapted to the temperature discharge sensor is provided at the upper part of the first installation cavity 4. One end of the first connecting pipe 1 is provided with a second connecting pipe 2 communicating with it, and the other end of the second connecting pipe 2 is provided with a protection pipe 3 communicating with it. The cavity diameters inside the second connecting pipe 2 and the protection pipe 3 are the same and are adapted to the diameter of the temperature discharge sensor; an external thread A adapted to the threaded hole of the exhaust pipe is provided on the outer wall surface of the second connecting pipe 2. The diameters of the first connecting pipe 1, the second connecting pipe 2, and the protection pipe 3 decrease in sequence; during installation, one end of the temperature discharge sensor is inserted into the cavity of the protection sleeve, and is threadedly connected to the temperature discharge sensor through the internal thread A of the first connecting pipe 1. Then, the length of the protection pipe 3 is adjusted so that the arc-shaped groove 5 is closely attached to the probe of the temperature discharge sensor. Then, it is threadedly connected to the exhaust pipe through the external thread A on the second connecting pipe 2, so as to achieve the purpose of measuring the temperature of the internal cavity of the exhaust pipe. By adding a protection sleeve to the temperature discharge sensor, the temperature discharge sensor can be effectively protected and its service life can be extended.

[0023] In this embodiment, an arc-shaped wall 9 is provided at the lower part of the inner wall of the first installation cavity 4, which is convenient for the temperature discharge sensor to be inserted and installed in the cavity of the protection sleeve, and at the same time avoids the probe of the temperature discharge sensor from bumping against the inner wall of the protection sleeve, thereby damaging the probe of the temperature discharge sensor.

[0024] In this embodiment, the protection pipe 3 includes an upper protection pipe 31 and a lower protection pipe 32. A first sink 6 is provided at one end of the upper protection pipe 31 away from the first connecting pipe 1, and an internal thread B is provided in the first sink 6. One end of the lower protection pipe 32 is provided with an external thread B adapted to the internal thread B. The upper protection pipe 31 and the lower protection pipe 32 are threadedly connected; through the threaded connection between the upper protection pipe 31 and the lower protection pipe 32, the overall length of the protection pipe 3 can be adjusted according to the length of different models of temperature discharge sensors, and the arc-shaped groove 5 can be closely attached to the probe of the temperature discharge sensor, effectively improving the measurement accuracy of the temperature discharge sensor.

[0025] In this embodiment, a second sink 7 is provided at one end of the first sink 6, and the diameters of the first sink 6 and the second sink 7 decrease in sequence. A fixed pipe 10 is provided at one end of the lower protection pipe 32 close to the external thread B. The diameter of the fixed pipe 10 is adapted to the diameter of the second sink 7. The fixed pipe 10 is movably inserted into the second sink 7. When the upper protection pipe 31 is threadedly connected to the lower protection pipe 32, the fixed pipe 1 is inserted and installed in the second sink 7. When the lower protection pipe 32 is subjected to the pressure of the gas in the exhaust pipe, the fixed pipe 1 and the inner wall of the second sink 7 are mutually extruded, thereby applying a force opposite to the pressure, effectively improving the firmness between the lower protection pipe 32 and the upper protection pipe 31.

[0026] In this embodiment, a sealing groove 8 is provided in the second sink 7, and a sealing ring is provided in the sealing groove 8 to improve the sealing performance between the upper protection pipe 31 and the lower protection pipe 32, prevent the gas in the exhaust pipe from entering the cavity in the protection pipe 3, damage the exhaust temperature sensor installed in the protection pipe 3, and effectively extend the service life of the exhaust temperature sensor.

[0027] In this embodiment, an arc-shaped groove 5 is provided at the bottom of the lower protection pipe 32. The arc-shaped groove 5 is adapted to the probe of the exhaust temperature sensor, and the arc-shaped groove 5 is completely fitted with the probe of the exhaust temperature sensor, preventing there from being a gap between the exhaust temperature sensor and the lower protection pipe 31. Since the temperature loss through air transmission is relatively large, the accuracy of the exhaust temperature sensor for measuring temperature is effectively improved.

[0028] In this embodiment, the first connecting pipe 1, the second connecting pipe 2, and the upper protection pipe 31 are of an integrally formed structure, effectively improving the overall structural strength of the protective sleeve.

[0029] The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which will not affect the implementation effect of the present invention and the practicality of the patent.

Claims

1. An exhaust temperature sensor protective sleeve, characterized in that, It includes a first connecting pipe (1). A first installation cavity (4) is provided inside the first connecting pipe (1). An internal thread A adapted to the exhaust temperature sensor is provided in the upper part of the first installation cavity (4). One end of the first connecting pipe (1) is provided with a second connecting pipe (2) communicated with it. The other end of the second connecting pipe (2) is provided with a protection pipe (3) communicated with it. An external thread A adapted to the threaded hole of the exhaust pipe is provided on the outer wall surface of the second connecting pipe (2). The diameters of the first connecting pipe (1), the second connecting pipe (2), and the protection pipe (3) decrease in sequence.

2. The exhaust temperature sensor protective sleeve according to claim 1, characterized in that, An arc-shaped wall (9) is provided at the lower part of the inner wall of the first installation cavity (4).

3. The temperature discharge sensor protective sleeve according to claim 1, characterized in that, The protection pipe (3) includes an upper protection pipe (31) and a lower protection pipe (32). A first sink (6) is provided at one end of the upper protection pipe (31) away from the first connecting pipe (1). An internal thread B is provided in the first sink (6). An external thread B adapted to the internal thread B is provided at one end of the lower protection pipe (32). The upper protection pipe (31) and the lower protection pipe (32) are connected by threads.

4. A temperature discharge sensor protective cover according to claim 3, characterized in that, A second sink (7) is provided at one end of the first sink (6). The diameters of the first sink (6) and the second sink (7) decrease in sequence. A fixed pipe (10) is provided at one end of the lower protection pipe (32) close to the external thread B. The diameter of the fixed pipe (10) is adapted to the diameter of the second sink (7). The fixed pipe (10) is movably inserted into the second sink (7).

5. The exhaust temperature sensor protective sleeve according to claim 4, wherein A sealing groove (8) is provided in the second sink (7). A sealing ring is provided in the sealing groove (8).

6. The exhaust temperature sensor protective sleeve according to claim 3, characterized in that, An arc-shaped groove (5) is provided at the bottom of the lower protection pipe (32). The arc-shaped groove (5) is adapted to the probe of the exhaust temperature sensor.

7. The exhaust temperature sensor protective sleeve according to claim 3, characterized in that, The first connecting pipe (1), the second connecting pipe (2), and the upper protection pipe (31) are of an integrally formed structure.

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