High-temperature probe for high-temperature and high-speed airflow contact type temperature measurement

Abstract

The utility model relates to a high-temperature high-speed airflow contact type temperature measurement high-temperature probe, which is characterized in that a first detection galvanic couple is exposed when being close to one end of an opening of a protective shell, so that the first detection galvanic couple is in contact with an external environment, and the temperature of the external environment is further detected; the first detection galvanic couple and the second detection galvanic couple are separated from each other, and meanwhile, the second detection galvanic couple is exposed when being close to one end of the opening of the protective shell, so that the second detection galvanic couple is in contact with the external environment and is further used for detecting the temperature of the external environment, and a certain distance exists between the detection position of the first detection galvanic couple and the detection position of the second detection galvanic couple. Therefore, the detection result of the first detection galvanic couple and the detection result of the second detection galvanic couple form a data gradient difference, so that extreme data can be conveniently removed, and the accuracy of the detection result is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of thermocouples, in particular to a high-temperature probe for high-temperature and high-speed airflow contact type temperature measurement. BACKGROUND

[0002] A thermocouple is a temperature measuring element commonly used in temperature measuring instruments, which directly measures temperature and converts the temperature signal into a thermoelectric electromotive force signal, and then converts the thermoelectric electromotive force signal into the temperature of the measured medium through an electrical instrument (secondary instrument). The shapes of various thermocouples are often very different due to needs, but their basic structures are roughly the same, and are usually composed of a thermoelectric electrode, an insulating sleeve protective tube and a terminal box, and are usually used in combination with display instruments, recording instruments and electronic regulators.

[0003] When the existing thermocouple is used for temperature measurement of high-speed airflow, it is difficult to achieve non-contact type thermocouple measurement because of the isolation of the pipeline, and the thickness of the outer protective sleeve tube of the sensor needs to be increased or a wear-resistant layer needs to be added to the protective sleeve tube when the existing thermocouple is applied to temperature measurement of high-speed airflow. These measures will slow down the response time. In order to quickly respond to obtain real-time data, the thickness of the protective tube needs to be reduced, which not only shortens the service life, but also makes the measurement data unstable due to the scouring and vibration of the airflow, and it is difficult to obtain reliable real-time data. CONTENT OF THE INVENTION

[0004] Therefore, it is necessary to provide a high-temperature probe for high-temperature and high-speed airflow contact type temperature measurement in view of the slow response time and unstable data caused by vibration of the traditional thermocouple when measuring the temperature of high-speed airflow.

[0005] The application provides a high-temperature probe for high-temperature and high-speed airflow contact type temperature measurement, which comprises:

[0006] A protective shell is provided in a hollow cylindrical shape, one end of the protective shell is closed, and the other end of the protective shell is provided with an opening;

[0007] A first detection thermocouple is arranged in the protective shell, one end of the first detection thermocouple penetrates through the closed end of the protective shell, and the first detection thermocouple further extends to the end of the protective shell close to the opening through the closed end of the protective shell;

[0008] A second detection thermocouple is arranged in the protective shell, one end of the second detection thermocouple penetrates through the closed end of the protective shell, and the second detection thermocouple further extends to the end of the protective shell close to the opening through the closed end of the protective shell;

[0009] Compared with the second detection thermocouple, the first detection thermocouple is closer to the end of the protective shell with the opening.

[0010] The application relates to a high-temperature probe for high-temperature and high-speed airflow contact type temperature measurement, which is characterized in that a first detection thermocouple is exposed at one end close to an opening of a protective shell to make the first detection thermocouple contact an external environment and detect the temperature of the external environment, and a second detection thermocouple is exposed at one end close to the opening of the protective shell to make the second detection thermocouple contact the external environment and detect the temperature of the external environment. Since the detection positions of the first detection thermocouple and the second detection thermocouple are apart from each other, the detection result of the first detection thermocouple and the detection result of the second detection thermocouple form a gradient difference of data, and thus extreme data can be removed and the accuracy of the detection result is improved. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 The application provides a high-temperature probe for high-temperature and high-speed airflow contact type temperature measurement.

[0012] Figure 2 The application provides a high-temperature probe for high-temperature and high-speed airflow contact type temperature measurement.

[0013] Figure 3 The application provides a high-temperature probe for high-temperature and high-speed airflow contact type temperature measurement. Figure 2 The application provides a high-temperature probe for high-temperature and high-speed airflow contact type temperature measurement.

[0014] Figure 4 The application provides a high-temperature probe for high-temperature and high-speed airflow contact type temperature measurement.

[0015] Figure 5 The application provides a high-temperature probe for high-temperature and high-speed airflow contact type temperature measurement. Figure 4 The application provides a high-temperature probe for high-temperature and high-speed airflow contact type temperature measurement.

[0016] Reference signs:

[0017] 11, protective shell; 111, first shell; 112, second shell; 113, third shell;

[0018] 12, first detection thermocouple; 121, first thermocouple part; 122, second thermocouple part;

[0019] 13, second detection thermocouple; 131, third thermocouple part; 132, fourth thermocouple part; 14, flow guide hole;

[0020] 141, first through hole; 142, second through hole; 15, first detection point; 16, second detection point. DETAILED DESCRIPTION

[0021] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0022] As shown in the embodiment of the present application, the high-temperature probe of the high-temperature high-speed airflow contact type temperature measurement comprises a protective shell 11, a first detection thermocouple 12 and a second detection thermocouple 13. Figure 1

[0023] The protective shell 11 is arranged in a hollow cylindrical shape. One end of the protective shell 11 is arranged to be closed. The other end of the protective shell 11 is arranged to have an opening.

[0024] The first detection thermocouple 12 is arranged in the protective shell 11. One end of the first detection thermocouple 12 penetrates through the closed end of the protective shell 11. The first detection thermocouple 12 also extends to the end of the protective shell 11 close to the opening through the closed end of the protective shell 11.

[0025] The second detection thermocouple 13 is arranged in the protective shell 11. One end of the second detection thermocouple 13 penetrates through the closed end of the protective shell 11. The second detection thermocouple 13 also extends to the end of the protective shell 11 close to the opening through the closed end of the protective shell 11.

[0026] The first detection thermocouple 12 is closer to the opening side of the protective shell 11 than the second detection thermocouple 13.

[0027] Specifically, the first detection thermocouple 12 and the second detection thermocouple 13 both penetrate through the inside of the protective shell 11, and the first detection thermocouple 12 is exposed at the end of the protective shell 11 close to the opening, and the second detection thermocouple 13 is exposed at the end of the protective shell 11 close to the opening, and the exposed position of the first detection thermocouple 12 is staggered with the exposed position of the second detection thermocouple 13, and the exposed position of the first detection thermocouple 12 is closer to the opening of the protective shell 11.

[0028] In the embodiment, the first detection thermocouple 12 is exposed at the end of the protective shell 11 close to the opening to contact the external environment, thereby being used for detecting the temperature of the external environment, and the second detection thermocouple 13 is exposed at the end of the protective shell 11 close to the opening to contact the external environment, thereby being used for detecting the temperature of the external environment. Since the detection position of the first detection thermocouple 12 and the detection position of the second detection thermocouple 13 have a certain distance, the detection result of the first detection thermocouple 12 and the detection result of the second detection thermocouple 13 form a gradient difference of data, thereby facilitating the removal of extreme data and improving the accuracy of the detection result.​

[0029] As Figure 1 shown in the embodiment of the present application, the protective shell 11 is set as a rotary body. A plurality of drainage holes 14 are formed on the protective shell 11. The plurality of drainage holes 14 are arranged equidistantly along the circumferential direction of the protective shell 11.

[0030] In the embodiment, the drainage holes 14 are arranged near the part for detection of the first detection thermocouple 12 and the part for detection of the second detection thermocouple 13, so that the part for detection of the first detection thermocouple 12 and the part for detection of the second detection thermocouple 13 are more easily contacted with the external environment, and the data of the external environment are more easily obtained or detected.

[0031] Meanwhile, when the high-temperature probe for high-temperature and high-speed airflow contact type temperature measurement is used for temperature detection of high-speed flowing airflow, the airflow is guided through the plurality of drainage holes 14, so as to reduce the inaccuracy of the detection results caused by the vibration and the instability of the pressure due to the high-speed flow of the airflow.

[0032] As Figure 3 shown in the embodiment of the present application, the first detection thermocouple 12 is provided with a first detection point 15. The first detection point 15 is arranged near the end of the first detection point 15 having an opening of the protective shell 11.

[0033] The second detection thermocouple 13 is provided with a second detection point 16. The second detection point 16 is arranged near the end of the second detection point 16 having an opening of the protective shell 11.

[0034] Specifically, the first detection point 15 on the first detection thermocouple 12 is the part of the first detection thermocouple 12 for directly contacting with the external temperature data, and the second detection point 16 on the second detection thermocouple 13 is the part of the second detection thermocouple 13 for directly contacting with the external temperature data.

[0035] In the embodiment, two temperature data of the external environment are obtained through the first detection point 15 and the second detection point 16, and the temperature data obtained by the first detection point 15 and the temperature data obtained by the second detection point 16 have a change gradient.

[0036] As Figure 3 shown in the embodiment of the present application, the plurality of drainage holes 14 are arranged in a plane, the axis of the protective shell 11 is perpendicular to the plane, and the plane is arranged between the first detection point 15 and the second detection point 16.

[0037] In the embodiment, the flow hole 14 facilitates the flow of external gas, thereby improving the accuracy and speed of temperature detection of the first detection point 15 and the second detection point 16.

[0038] As shown in the drawings, in an embodiment of the present application, the protective shell 11 comprises a first shell 111, a second shell 112 and a third shell 113. Figure 2

[0039] The first shell 111 is in a cylindrical shape.

[0040] The second shell 112 is arranged in the first shell 111. The first shell 111 is fixedly sleeved outside the second shell 112.

[0041] The third shell 113 is arranged in the second shell 112. The second shell 112 is fixedly sleeved outside the third shell 113.

[0042] In the embodiment, the first shell 111 is made of GH3030 high-temperature alloy material, the second shell 112 and the third shell 113 are both made of ceramic material, and the third shell 113 is provided with a first limiting hole and a second limiting hole. The first detection thermocouple 12 passes through the first limiting hole, and the second detection thermocouple 13 passes through the second limiting hole.

[0043] As shown in the drawings, in an embodiment of the present application, the flow hole 14 comprises a first through hole 141 and a second through hole 142. Figure 3 The first through hole 141 is arranged on the first shell 111.

[0044] The second through hole 142 is arranged on the second shell 112. The first through hole 141 and the second through hole 142 are in communication. The axis of the first through hole 141 is collinear with the axis of the second through hole 142.

[0045] In the embodiment, the flow hole 14 is composed of the first through hole 141 and the second through hole 142 in communication, and the inner diameters between the first through hole 141 and the second through hole 142 are different. The first through hole 141 is arranged on the first shell 111, and the second through hole 142 is arranged on the second shell 112.

[0046] As shown in the drawings, in an embodiment of the present application, the diameter of the first through hole 141 is larger than the diameter of the second through hole 142.

[0047] Figure 3

[0048] ​​​In the embodiment, by setting the aperture of the first through hole 141 to be larger than the aperture of the second through hole 142, the air flow is prevented from forming an air flow step, and the air flow is introduced between the first detection point 15 and the second detection point 16.

[0049] As shown in the drawings, Figure 2 In an embodiment of the present application, the first detection couple 12 passes through the third shell 113. The second detection couple 13 passes through the third shell 113.

[0050] In the embodiment, the first detection couple 12 is fixedly connected with the third shell 113, and the second detection couple 13 is fixedly connected with the third shell 113.

[0051] As shown in the drawings, Figure 4 and Figure 5 In an embodiment of the present application, the first detection couple 12 includes a first couple part 121 and a second couple part 122.

[0052] The first couple part 121 passes through the third shell 113.

[0053] The second couple part 122 passes through the third shell 113. The first couple part 121 is fixedly connected with the second couple part 122 at the end close to the second through hole 142 to form the first detection point 15.

[0054] In the embodiment, the diameter of the first couple part 121 is the same as the diameter of the second couple part 122, both being 0.5 millimeters. The distance between the first detection point 15 and the opening end surface of the first shell 111 is 6 millimeters.

[0055] As shown in the drawings, Figure 5 In an embodiment of the present application, the second detection couple 13 includes a third couple part 131 and a fourth couple part 132.

[0056] The third couple part 131 passes through the third shell 113.

[0057] The fourth couple part 132 passes through the third shell 113. The third couple part 131 is fixedly connected with the fourth couple part 132 at the end close to the second through hole 142 to form the second detection point 16.

[0058] In the embodiment, the diameter of the first couple part 121 is the same as the diameter of the second couple part 122, both being 0.3 millimeters. The distance between the second detection point 16 and the first detection point 15 is 5 to 10 millimeters.

[0059] Any combination of the technical features in the above-described embodiments can be made, and the method steps are not limited in execution order. For the sake of brevity, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combination of the technical features does not exist in contradiction, it should be considered as within the scope of the present disclosure.

[0060] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A high temperature probe for high temperature, high velocity gas stream contact temperature measurement, characterized by, The high-temperature probe of the high-temperature high-speed airflow contact type temperature measurement comprises: a protective shell arranged in a hollow cylindrical shape, one end of the protective shell being arranged as closed, and the other end of the protective shell being arranged as having an opening; a first detection thermocouple arranged in the protective shell, one end of the first detection thermocouple penetrating through the closed end of the protective shell and extending to the end of the protective shell close to the opening; a second detection thermocouple arranged in the protective shell, one end of the second detection thermocouple penetrating through the closed end of the protective shell and extending to the end of the protective shell close to the opening; the first detection thermocouple is closer to the end of the protective shell having the opening than the second detection thermocouple.

2. The high temperature, high velocity gas stream contact temperature measuring high temperature probe of claim 1, wherein, The protective shell is arranged as a rotary body, a plurality of drainage holes are arranged on the protective shell, the plurality of drainage holes are arranged close to the end of the protective shell having the opening, and the plurality of drainage holes are equidistantly arranged along the circumferential direction of the protective shell.

3. The high temperature, high velocity gas stream contact temperature measuring high temperature probe of claim 2, wherein, A first detection point is arranged on the first detection thermocouple, and the first detection point is arranged at the end of the first detection thermocouple close to the opening of the protective shell. A second detection point is arranged on the second detection thermocouple, and the second detection point is arranged at the end of the second detection thermocouple close to the opening of the protective shell.

4. The high temperature, high velocity gas stream contact temperature measuring high temperature probe of claim 3, wherein, The plurality of drainage holes are circumferentially arranged in a plane, the axis of the protective shell is perpendicular to the plane, and the plane is arranged between the first detection point and the second detection point.

5. The high temperature, high velocity gas stream contact temperature measuring high temperature probe of claim 4, wherein, The protective shell comprises: a first shell arranged in a cylindrical shape; a second shell arranged in the first shell, the first shell being fixedly sleeved on the outside of the second shell; a third shell arranged in the second shell, the second shell being fixedly sleeved on the outside of the third shell.

6. The high temperature, high velocity gas stream contact temperature measuring high temperature probe of claim 5, wherein, The drainage holes comprise: a first through hole arranged on the first shell; a second through hole arranged on the second shell, the first through hole and the second through hole being in communication, and the axis of the first through hole and the axis of the second through hole being collinear.

7. The high temperature, high velocity gas stream contact temperature measuring high temperature probe of claim 6, wherein, The diameter of the first through hole is larger than the diameter of the second through hole.

8. The high temperature, high velocity gas stream contact temperature measuring high temperature probe of claim 7, wherein, The first detection thermocouple penetrates through the third shell, and the second detection thermocouple penetrates through the third shell.

9. The high temperature, high velocity gas stream contact temperature measured high temperature probe of claim 8, wherein, The first detection thermocouple comprises: a first thermocouple part penetrating through the third shell; a second thermocouple part penetrating through the third shell, one end of the first thermocouple part close to the second through hole being fixedly connected with one end of the second thermocouple part close to the second through hole to form a first detection point.

10. The high temperature, high velocity gas stream contact temperature measured high temperature probe of claim 9, wherein, The second detection thermocouple comprises: a third thermocouple part penetrating through the third shell; a fourth thermocouple part penetrating through the third shell, one end of the third thermocouple part close to the second through hole being fixedly connected with one end of the fourth thermocouple part close to the second through hole to form a second detection point.

Images