Leakage-proof device of thermocouple

Abstract

The utility model provides a leakproof device for a thermocouple, which comprises a thermocouple junction box and a hot air pipeline, one side of the thermocouple junction box is fixedly connected with a thermocouple binding post, the surface of the thermocouple binding post is sleeved with a limiting block, the cylindrical surface of the thermocouple binding post is made into a threaded surface through injection molding, and the threaded surface is made into a threaded surface. Compared with the prior art, the high-temperature shielding assembly has the following beneficial effects that the protective inner shell in the high-temperature shielding assembly is in the shape of a hollow semicircular shell, so that when hot air in the hot air pipeline leaks out from a connection gap between the detection column and the pipeline, the hot air in the hot air pipeline is prevented from leaking out; the thermocouple junction box can be shielded by the hollow semicircular protective inner shell, and hot air is blown to the surface of the hot air pipeline in the reverse direction due to the concave arc surface of the protective inner shell after rushing into the protective inner shell, so that the hot air impact on the thermocouple junction box can be reduced, and the service life of a protective pipe sleeving the thermocouple is prolonged.

Description

Technical Field

[0001] The utility model discloses a thermocouple anti-leakage device, belonging to the field of thermocouple equipment. Background Art

[0002] Thermocouples are commonly used temperature measuring elements in temperature measuring instruments. They directly measure temperature and convert temperature signals into thermoelectric potential signals, which are then converted into the temperature of the measured medium through electrical instruments (secondary instruments). The appearance of various thermocouples is often very different due to needs, but their basic structure is roughly the same. They are usually composed of main parts such as thermode, insulating sleeve protection tube and junction box, and are usually used in conjunction with display instruments, recording instruments and electronic regulators.

[0003] The existing blast furnace ironmaking is a continuous production process. The hot air temperature is one of the key detection parameters of the blast furnace ironmaking operation, which is generally between 1000 and 1300°C. The measurement position is inside the hot air main duct in a high temperature, high pressure and high flow rate environment. In order to prevent the thermocouple wire from being burned out by high temperature, a thick-walled high-temperature resistant ceramic tube is usually sheathed on the outside of the thermocouple for high temperature protection. However, the protective tube sheathed on the outside of the thermocouple still has a heat conduction function, and the hot air directly impacts the surface of the protective tube. As the use time increases, the protective tube will also be affected by the high temperature and age, thereby reducing the anti-leakage effect, resulting in an increase in the high-temperature heating time suffered by the protective tube of the thermocouple wire. After the temperature measurement working time of the thermocouple is extended, the thermocouple wire inside the thermocouple will also be subjected to high temperature due to the thermal conductivity of the material, thereby reducing the service life of the thermocouple.

[0004] In summary, the utility model provides a thermocouple anti-leakage device to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a leakage prevention device for a thermocouple, so as to solve the problem proposed in the above background technology that the hot air leaking out of the gap between the hot air duct and the thermocouple connection will continuously heat the protective tube sheathed outside the thermocouple, thereby shortening the service life of the outer protective tube of the thermocouple.

[0006] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a thermocouple leakage prevention device, including a thermocouple junction box and a hot air duct, one side of the thermocouple junction box is fixedly connected to a thermocouple terminal, the surface of the thermocouple terminal is sleeved with a limit block, the cylindrical surface of the thermocouple terminal is made into a threaded surface by injection molding, one end of the thermocouple terminal passes through the hot air duct and extends to the interior of the hot air duct, one end of the thermocouple terminal is fixedly connected to a detection column located inside the hot air duct, and the threaded surface of the thermocouple terminal is sleeved with a high-temperature shielding component.

[0007] Furthermore, the thermocouple terminal is threadedly connected to the hot air duct, and the limit block is fixedly connected to the thermocouple terminal.

[0008] Furthermore, the high temperature shielding assembly includes a protective inner shell, which is sleeved on the threaded surface of the thermocouple terminal and located on one side of the limit block, and the outer shell of the protective inner shell is sleeved with a flame retardant shell, and the outer shell of the flame retardant shell is sleeved with an outer shell.

[0009] Furthermore, the protective inner shell is in the shape of a hollow semicircular shell, and the protective inner shell is threadedly connected to the thermocouple terminal through the threaded surface of the thermocouple terminal.

[0010] Furthermore, the protective inner shell is fixedly connected to the flame-retardant shell, and the protective inner shell is in contact with a limiting block.

[0011] Furthermore, the flame retardant shell is fixedly connected to the outer shell, and the protective inner shell is in the shape of a hollow semicircular shell.

[0012] Furthermore, the shell is in the shape of a hollow semicircular shell, and the outer surface of the shell is formed with anti-slip patterns by injection molding.

[0013] Beneficial effects of the utility model:

[0014] The protective inner shell in the high-temperature shielding component is in a hollow semicircular shell shape. When the hot air inside the hot air duct leaks out from the connecting gap between the detection column and the duct, it can be shielded by the hollow semicircular shell-shaped protective inner shell. After the hot air rushes to the inside of the protective inner shell, it will be blown back to the surface of the hot air duct due to the concave arc surface of the protective inner shell, thereby reducing the hot air impact on the thermocouple junction box and extending the service life of the protective tube sheathed on the outside of the thermocouple.

[0015] The protective inner shell is made of ceramic, which has super heat resistance and flame retardancy and will not be melted by the hot air at the leakage in the hot air duct. The flame retardant shell is made of rock wool board, which has the characteristics of light weight, small thermal conductivity, heat absorption and flame retardancy, so that the high temperature of the protective inner shell will not be transferred to the outer shell, thereby improving the safety of thermocouple operation. The outer shell is made of stainless steel, which has the characteristics of stainless and corrosion resistance, and effectively extends the life of the thermocouple leakage prevention device.

[0016] Anti-skid patterns are formed by injection molding on the outer surface of the shell, and the friction of the shell surface can be increased by utilizing the anti-skid patterns, thereby facilitating the disassembly and assembly of the high-temperature shielding component, thereby improving the convenience of disassembly and assembly of the thermocouple anti-leakage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0018] Figure 1 This is a schematic structural perspective diagram of a thermocouple anti-leakage device of the utility model;

[0019] Figure 2 This is a schematic front view of the structure of a thermocouple anti-leakage device of the utility model;

[0020] Figure 3 This is a main cross-sectional view showing the structure of a thermocouple anti-leakage device of the utility model;

[0021] Figure 4 It is a schematic top view of the structure of a thermocouple anti-leakage device of the utility model;

[0022] Figure 5 The utility model is a schematic top cross-sectional view of the structure of a thermocouple anti-leakage device.

[0023] In the figure: 1. Thermocouple junction box; 2. Hot air duct; 3. Limit block; 4. Detection column; 5. Thermocouple junction post; 6. High temperature shielding component; 61. Protective inner shell; 62. Flame retardant shell; 63. Outer shell; 64. Anti-slip texture. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] See also Figure 1-5 The utility model provides a technical solution: a thermocouple leakage prevention device, comprising a thermocouple junction box 1 and a hot air duct 2, one side of the thermocouple junction box 1 is fixedly connected to a thermocouple terminal 5, the surface of the thermocouple terminal 5 is sleeved with a limit block 3, the limit block 3 limits the installation position of a high-temperature shielding component 6, the cylindrical surface of the thermocouple terminal 5 is made into a threaded surface by injection molding, one end of the thermocouple terminal 5 passes through the hot air duct 2 and extends to the inside of the hot air duct 2, one end of the thermocouple terminal 5 and is located inside the hot air duct 2 and is fixedly connected with a detection column 4, the threaded surface of the thermocouple terminal 5 is sleeved with a high-temperature shielding component 6, the thermocouple terminal 5 is threadedly connected to the hot air duct 2, and the limit block 3 is fixedly connected to the thermocouple terminal 5.

[0026] See also Figure 2-5The high temperature shielding component 6 includes a protective inner shell 61, which is sleeved on the threaded surface of the thermocouple terminal 5 and is located on one side of the limit block 3. The outer sleeve of the protective inner shell 61 is provided with a flame retardant shell 62, and the outer sleeve of the flame retardant shell 62 is provided with an outer shell 63. The protective inner shell 61 is made of ceramic, which has super heat resistance and flame retardancy and will not be melted by the hot air at the leakage point in the hot air duct 2. The protective inner shell 61 is in the shape of a hollow semicircular shell. The protective inner shell 61 is threadedly connected to the thermocouple terminal 5 through the threaded surface of the thermocouple terminal 5. The protective inner shell 61 is fixedly connected to the flame retardant shell 62. The protective inner shell 61 is in contact with the limit block 3. The flame retardant shell 62 is made of rock wool board, which has the characteristics of light weight, small thermal conductivity, heat absorption and flame retardancy, so that the high temperature of the protective inner shell 61 will not be transferred to the outer shell 63, thereby improving Safety of thermocouple operation, the outer shell 63 is made of stainless steel, and has the characteristics of stainless steel and corrosion resistance. The flame retardant shell 62 is fixedly connected to the outer shell 63, and the protective inner shell 61 is in the shape of a hollow semicircular shell. When the hot air inside the hot air duct 2 leaks out from the connection gap between the detection column 4 and the duct, it can be blocked by the protective inner shell 61 in the shape of a hollow semicircular shell. After the hot air rushes to the inside of the protective inner shell 61, it will be blown back to the surface of the hot air duct 2 due to the concave arc surface of the protective inner shell 61, thereby reducing the hot air impact on the thermocouple junction box 1 and extending the service life of the protective tube sheathed on the outside of the thermocouple. The outer shell 63 is in the shape of a hollow semicircular shell, and the outer surface of the outer shell 63 is made of anti-slip texture 64 by injection molding. The anti-slip texture 64 can increase the friction on the surface of the outer shell 63, thereby facilitating the disassembly and assembly of the high-temperature shielding component 6.

[0027] Specific implementation method: The thermocouple is fixed on the hot air duct 2 through the thermocouple terminal 5, and the hot air temperature inside the hot air duct 2 is detected. Since the protective inner shell 61 in the high-temperature shielding component 6 is in the shape of a hollow semicircular shell, when the hot air inside the hot air duct 2 leaks out from the connection gap between the detection column 4 and the duct, it can be blocked by the protective inner shell 61 in the shape of a hollow semicircular shell. After the hot air rushes to the inside of the protective inner shell 61, it will be blown back to the surface of the hot air duct 2 due to the concave arc surface of the protective inner shell 61, thereby reducing the hot air impact suffered by the thermocouple terminal box 1, extending the service life of the protective tube set on the outside of the thermocouple, and protecting The inner shell 61 is made of ceramic, which has super heat resistance and flame retardancy and will not be melted by the hot air at the leakage point in the hot air duct 2. The flame retardant shell 62 is made of rock wool board, which has the characteristics of light weight, low thermal conductivity, heat absorption and flame retardancy, so that the high temperature of the protective inner shell 61 will not be transferred to the outer shell 63, thereby improving the safety of thermocouple operation. The outer shell 63 is made of stainless steel and has the characteristics of stainlessness and corrosion resistance. The outer surface of the outer shell 63 is made of anti-slip texture 64 by injection molding. The anti-slip texture 64 can increase the friction force on the surface of the outer shell 63, thereby facilitating the disassembly and assembly of the high-temperature shielding component 6, thereby improving the disassembly and assembly convenience of the thermocouple anti-leakage device.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A thermocouple anti-leakage device, comprising a thermocouple junction box (1) and a hot air duct (2), characterized in that: A thermocouple terminal (5) is fixedly connected to one side of the thermocouple terminal box (1); a limit block (3) is sleeved on the surface of the thermocouple terminal (5); a threaded surface is formed on the cylindrical surface of the thermocouple terminal (5) by injection molding; one end of the thermocouple terminal (5) penetrates the hot air duct (2) and extends to the inside of the hot air duct (2); a detection column (4) is fixedly connected to one end of the thermocouple terminal (5) and is located inside the hot air duct (2); and a high-temperature shielding component (6) is sleeved on the threaded surface of the thermocouple terminal (5).

2. The anti-leakage device for a thermocouple according to claim 1, characterized in that: The thermocouple terminal (5) is threadedly connected to the hot air duct (2), and the limit block (3) is fixedly connected to the thermocouple terminal (5).

3. The anti-leakage device for a thermocouple according to claim 1, characterized in that: The high temperature shielding assembly (6) comprises a protective inner shell (61), the protective inner shell (61) being sleeved on the threaded surface of the thermocouple terminal (5) and located on one side of the limit block (3), the outer portion of the protective inner shell (61) being sleeved with a flame retardant shell (62), and the outer portion of the flame retardant shell (62) being sleeved with an outer shell (63).

4. The anti-leakage device for a thermocouple according to claim 3, characterized in that: The protective inner shell (61) is in the shape of a hollow semicircular shell, and the protective inner shell (61) is threadedly connected to the thermocouple terminal (5) via the threaded surface of the thermocouple terminal (5).

5. The anti-leakage device for a thermocouple according to claim 3, characterized in that: The protective inner shell (61) is fixedly connected to the flame retardant shell (62), and the protective inner shell (61) is in contact with the limit block (3).

6. The anti-leakage device for a thermocouple according to claim 3, characterized in that: The flame retardant shell (62) is fixedly connected to the outer shell (63), and the protective inner shell (61) is in the shape of a hollow semicircular shell.

7. The anti-leakage device for a thermocouple according to claim 3, characterized in that: The outer shell (63) is in the shape of a hollow semicircular shell, and the outer surface of the outer shell (63) is formed by injection molding to have anti-slip patterns (64).

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