Thermocouple protective sleeve

Abstract

The utility model discloses a thermocouple protective sleeve, which comprises a protective sleeve body. One end of the protective shell is arranged to be open and is detachably connected with the front end of the protective sleeve body, a ternary boride metal ceramic alloy layer is cladded on the protective shell, and the length of the protective shell is 1 / 3-1 / 2 of the length of the protective sleeve body. According to the thermocouple protection sleeve, the ternary boride metal ceramic alloy layer is cladded on the protection shell, and the protection shell and the protection sleeve body are detachably arranged, so that the high temperature resistance, the corrosion resistance and the wear resistance of the thermocouple protection sleeve can be improved by utilizing the protection shell, the protection shell is convenient to replace, the service life of the thermocouple protection sleeve is remarkably prolonged, and the service life of the thermocouple protection sleeve is prolonged. And the temperature measurement effect of the thermocouple is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of protective sleeves, in particular to a thermocouple protective sleeve. Background Art

[0002] Thermocouples have become the most widely used temperature sensing elements in the fields of industrial production and scientific research. The performance of the thermocouple protective sleeve material affects various performance indicators such as the long-term stability and service life of the thermocouple. For thermocouples working at high temperatures, their protective sleeves are easily affected by factors such as high temperature, corrosion, and wear, resulting in a decrease in the measurement accuracy of the thermocouple or even failure. Among them, the damage frequency at the front end of the protective sleeve is often relatively high, affecting the service life of the thermocouple. The existing protective sleeves enhance the protection function of the protective sleeve by spraying a coating on the surface of the protective sleeve, but this surface treatment method of the protective sleeve has problems such as low coating bonding strength, easy shedding, and unstable performance.

[0003] In view of this, it is necessary to design a thermocouple protective sleeve to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a thermocouple protective sleeve with high temperature resistance to wear, corrosion resistance, high bonding strength and not easy to fall off, and a long service life.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A thermocouple protective sleeve, comprising:

[0007] A protective sleeve body;

[0008] A protective shell, one end of the protective shell is open and detachably connected to the front end of the protective sleeve body. A ternary boride cermet alloy layer is cladded on the protective shell, and the length of the protective shell is 1 / 3 - 1 / 2 of the length of the protective sleeve body.

[0009] As a further improvement of the utility model, the ternary boride cermet alloy layer is a molybdenum iron chromium boron ceramic alloy layer, and the thickness of the molybdenum iron chromium boron ceramic alloy layer is 1 - 3 mm.

[0010] As a further improvement of the utility model, the side wall thickness of the protective sleeve body is 5 - 7 mm.

[0011] As a further improvement of the utility model, the protective shell and the protective sleeve body are in threaded connection.

[0012] As a further improvement of the utility model, a first heat conductive cotton sleeve for reducing the wear degree of the contact surface between the protective shell and the protective sleeve body is arranged in the protective shell.

[0013] As a further improvement of the present utility model, the protective shell includes a hemispherical body and a hollow cylinder connected to the hemispherical body, and the ternary boride metal ceramic alloy layer is provided on the side wall of the cylinder.

[0014] As a further improvement of the present utility model, a cladding area for cladding the ternary boride metal ceramic alloy is provided on the side wall of the cylinder. One end of the cladding area extends into the hemispherical body, and the other end is arc-connected to the side wall of the cylinder.

[0015] As a further improvement of the present utility model, the center of the arc of the arc connection part is close to the inside of the cylinder.

[0016] As a further improvement of the present utility model, a second heat-conducting cotton sleeve for shock absorption is provided inside the protective sleeve body.

[0017] The beneficial effects of the present utility model are as follows:

[0018] 1. By cladding a ternary boride metal ceramic alloy layer on the protective shell and detachably setting the protective shell and the protective sleeve body, the present utility model can improve the high-temperature wear resistance and corrosion resistance of the thermocouple protective sleeve while facilitating the replacement of the protective shell, significantly extending the service life of the thermocouple protective sleeve and ensuring the temperature measurement effect of the thermocouple. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the thermocouple protective sleeve of the present utility model.

[0020] Figure 2 is a schematic diagram of the disassembled structure of the thermocouple protective sleeve.

[0021] Figure 3 is a schematic diagram of the protective shell without cladding the ternary boride metal ceramic alloy.

[0022] REFERENCE NUMERALS

[0023] Protective sleeve body; 20, Protective shell; 21, Hemispherical body; 22, Cylinder; 221, Ternary boride metal ceramic alloy layer; 222, Cladding area; 23, First heat-conducting cotton sleeve; 30, Second heat-conducting cotton sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be described in detail below with reference to the drawings and specific embodiments.

[0025] Here, it should also be noted that in order to avoid obscuring the present utility model due to unnecessary details, only the structures and / or processing steps closely related to the solution of the present utility model are shown in the drawings, and other details less related to the present utility model are omitted.

[0026] In addition, it should be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0027] Please refer to Figure 1 and Figure 2 As shown, the present utility model provides a thermocouple protective sleeve, comprising:

[0028] A protective sleeve body 10;

[0029] A protective shell 20, one end of the protective shell 20 is open and detachably connected to the front end of the protective sleeve body 10. A ternary boride cermet alloy layer 221 is clad on the protective shell 20, and the length of the protective shell 20 is 1 / 3 - 1 / 2 of the length of the protective sleeve body 10.

[0030] Specifically, the protective shell 20 includes a hemispherical body 21 and a hollow cylinder 22 connected to the hemispherical body 21. The ternary boride cermet alloy layer 221 is disposed on the side wall of the cylinder 22; the ternary boride cermet alloy layer 221 is a molybdenum-iron-chromium-boron ceramic alloy layer, and the thickness of the molybdenum-iron-chromium-boron ceramic alloy layer is 1 - 3 mm. One end of the cylinder 22 away from the hemispherical body 21 is open.

[0031] Exemplarily, as Figure 3 shown, a cladding area 222 for cladding the ternary boride cermet alloy is provided on the side wall of the cylinder 22. One end of the cladding area 222 extends into the hemispherical body 21, and the other end is arc-connected to the side wall of the cylinder 22. The center of the arc of the arc-connected part is close to the inside of the cylinder 22, so that the left and right ends of the cladding area 222 can limit the coating material, avoiding the coating material from detaching from the cladding area 222 during the cladding process.

[0032] Specifically, the side wall thickness of the part where the protective sleeve body 10 is connected to the protective shell 20 is less than the side wall thickness of the rear half part of the protective sleeve body 10, so that after the protective shell 20 is connected to the protective sleeve body 10, the side wall of the protective shell 20 and the side wall of the protective sleeve body 10 are in the same plane, that is, after the protective shell 20 is installed on the protective sleeve body 10, the overall side wall of the protective sleeve is in a cylindrical structure. Exemplarily, the thickness of the side wall of the cylindrical structure is 5 - 7 mm.

[0033] Exemplarily, the protective shell 20 and the protective sleeve body 10 are threadedly connected. The protective shell 20 is provided with internal threads, and the front end of the protective sleeve body 10 is provided with external threads, thereby facilitating the replacement of the protective shell 20 as needed.

[0034] A first heat-conducting cotton sleeve 23 for reducing the wear degree of the contact surface between the protective case 20 and the protective sleeve body 10 is further arranged inside the protective case 20. In addition to playing a buffering role to reduce the wear between the protective case 20 and the protective sleeve body 10, the first heat-conducting cotton sleeve 23 can also improve the connection tightness between the protective case 20 and the protective sleeve body 10, improve the heat-conducting effect, and avoid the split design of the protective case 20 and the protective sleeve body 10 from affecting the instantaneous detection effect of the thermocouple.

[0035] Specifically, a second heat-conducting cotton sleeve 30 for shock absorption is arranged inside the protective sleeve body 10 to play a role in fixing the thermocouple to a certain extent and avoid damage caused by the shaking of the thermocouple inside the protective sleeve body 10 under the action of external force.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A thermocouple protection sleeve, characterized in that, Comprising: A protective cover body; A protective shell, one end of the protective shell is open and detachably connected to the front end of the protective cover body. A layer of ternary boride cermet alloy layer is cladded on the protective shell, and the length of the protective shell is 1 / 3 - 1 / 2 of the length of the protective cover body.

2. The thermocouple sheath according to claim 1, wherein: The ternary boride cermet alloy layer is a molybdenum-iron-chromium-boron ceramic alloy layer, and the thickness of the molybdenum-iron-chromium-boron ceramic alloy layer is 1 - 3 mm.

3. The thermocouple protective sheath according to claim 1, wherein: The side wall thickness of the protective cover body is 5 - 7 mm.

4. The thermocouple sheath according to claim 1, wherein: The protective shell and the protective cover body are in threaded connection.

5. The thermocouple sheath according to claim 4, wherein: A first heat-conducting cotton sleeve for reducing the wear degree of the contact surface between the protective shell and the protective cover body is arranged inside the protective shell.

6. The thermocouple sheath according to claim 1, characterized in that: The protective shell includes a hemispherical body and a hollow cylinder connected to the hemispherical body, and the ternary boride cermet alloy layer is arranged on the side wall of the cylinder.

7. The thermocouple sheath according to claim 6, characterized in that: A cladding area for cladding the ternary boride cermet alloy is arranged on the side wall of the cylinder. One end of the cladding area extends into the hemispherical body, and the other end is arc-connected to the side wall of the cylinder.

8. The thermocouple sheath according to claim 7, wherein: The center of the arc of the arc connection part is close to the inside of the cylinder.

9. The thermocouple protective sheath according to claim 1, wherein: A second heat-conducting cotton sleeve for shock absorption is arranged inside the protective cover body.

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