Thermocouple assembly with good sealing performance

Abstract

The utility model relates to the technical field of thermocouples, in particular to a thermocouple assembly with good sealing performance, which comprises a thermocouple body, a measuring rod and a pipeline body, a sealing cover is arranged at the top end of the outer surface of the measuring rod, a first annular sealing groove and a first sealing washer are arranged at the bottom end of the sealing cover, and a first sealing plug is arranged in the pipeline body. A second annular sealing groove and a second sealing washer are arranged on the outer surface of the first sealing plug, a second sealing plug is in threaded connection with the bottom end of the first sealing plug, a third annular sealing groove is formed in the outer surface of the second sealing plug, and a third sealing washer is arranged in the third annular sealing groove; according to the utility model, multi-layer sealing is formed, the sealing performance is better, the problem that the measurement result is influenced by external environmental factors due to poor sealing at the joint is not easy to occur, and the measurement accuracy is better.

Description

Technical Field

[0001] This utility model belongs to the field of thermocouple technology, specifically a thermocouple assembly with good sealing performance. Background Technology

[0002] Thermocouples are commonly used temperature measuring elements in temperature measuring instruments. They have the advantages of simple structure, wide measurement range, high accuracy, low inertia, and easy long-distance transmission of output signals. They are often used to measure the temperature of gases or liquids in furnaces and pipelines, as well as fixed surfaces. Thermocouples are usually fixed to the furnace or pipeline to be measured by flange mounting or thread mounting. The sealing performance of their connection is particularly important. Poor sealing at the connection can cause external environmental factors to affect the measurement results, resulting in reduced accuracy. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a thermocouple assembly with good sealing performance to address the above-mentioned defects, thereby solving the problems mentioned in the background art.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: A thermocouple assembly with good sealing performance includes a thermocouple body, a measuring rod disposed at the bottom end of the thermocouple body, and a pipeline body disposed below the thermocouple body. One end of the measuring rod extends into the pipeline body. A sealing cap is provided at the top of the outer surface of the measuring rod to form a seal on the top surface of the pipeline body. A first annular sealing groove is provided at the bottom end of the sealing cap. A first sealing gasket is disposed inside the first annular sealing groove. A first sealing plug is disposed inside the pipeline body. The top surface of the first sealing plug is fixedly connected to the bottom surface of the sealing cap. A second annular sealing groove is provided on the outer surface of the first sealing plug. A second sealing gasket is disposed inside the second annular sealing groove. A second sealing plug is threaded to the bottom end of the first sealing plug. A third annular sealing groove is provided on the outer surface of the second sealing plug. A third sealing gasket is disposed inside the third annular sealing groove. A fourth annular sealing groove is provided on the inner wall between the second sealing plug and the measuring rod. A fourth sealing gasket is disposed inside the fourth annular sealing groove.

[0005] Furthermore, the outer surfaces of the first and second sealing plugs abut against the inner wall of the pipeline body.

[0006] Furthermore, the outer surface of the sealing cap and the pipeline body is provided with an annular edging that surrounds the connection between the sealing cap and the pipeline body.

[0007] Furthermore, the annular edging is composed of a first edging and a second edging, both of which are semi-circular in structure, and are fixedly connected by bolts.

[0008] Furthermore, the annular edging is provided with a sealing gasket that abuts against the sealing cap and the outer surface of the pipeline body, and an elastic pressure-resistant body that drives the side wall of the sealing gasket to abut against the sealing cap and the outer surface of the pipeline body. One side of the elastic pressure-resistant body abuts against the inner side wall of the annular edging, and the other side abuts against the sealing gasket.

[0009] Furthermore, the elastic compression-resistant body consists of two symmetrically arranged arc-shaped structures, with one open end abutting against the inner wall of the annular edging and the other open end abutting against the sealing gasket.

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

[0011] This invention utilizes a combination of a sealing cap, a first sealing plug, a second sealing plug, a first annular sealing groove, a second annular sealing groove, a third annular sealing groove, a fourth annular sealing groove, a first sealing gasket, a second sealing gasket, a third sealing gasket, and a fourth sealing gasket. The sealing cap, the first sealing plug, and the second sealing plug form a triple seal at the connection between the pipeline body and the thermocouple body. Furthermore, the first sealing gasket, the second sealing gasket, the third sealing gasket, and the fourth sealing gasket form a multi-layer seal from the inside to the outside of the pipeline body, resulting in better sealing performance. This reduces the likelihood of measurement results being affected by external environmental factors due to poor sealing at the connection, thus improving measurement accuracy. Attached Figure Description

[0012] The foregoing and other objects, features and advantages of this utility model will become apparent from the following detailed description taken in conjunction with the accompanying drawings.

[0013] Figure 1 This is a partial cross-sectional view of the present invention from the front.

[0014] Figure 2 This is a cross-sectional view of the main body of the pipeline of this utility model.

[0015] Figure 3 This is a schematic diagram of the compound structure of the annular edging of this utility model.

[0016] The components include: 1. Thermocouple body; 2. Measuring rod; 3. Pipeline body; 4. Sealing cap; 401. First annular sealing groove; 402. First sealing gasket; 5. First sealing plug; 501. Second annular sealing groove; 502. Second sealing gasket; 6. Second sealing plug; 601. Third annular sealing groove; 602. Third sealing gasket; 603. Fourth annular sealing groove; 604. Fourth sealing gasket; 7. Annular edging; 701. First edging; 702. Second edging; 8. Sealing gasket; 9. Elastic pressure-resistant body. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Reference Figure 1-3 As shown, a thermocouple assembly with good sealing performance includes a thermocouple body 1, a measuring rod 2 disposed at the bottom of the thermocouple body 1, and a pipeline body 3 disposed below the thermocouple body 1. One end of the measuring rod 2 extends into the pipeline body 3. The measuring rod 2 is used to extend into the pipeline body 3 or into the furnace body to measure temperature. A sealing cap 4 is provided at the top of the outer surface of the measuring rod 2 to form a seal on the top surface of the pipeline body 3. The top of the outer surface of the pipeline body 3 extends horizontally outward to form a mounting part. The periphery of the sealing cap 4 is fixedly connected to the mounting part of the pipeline body 3 by bolts and nuts. A first annular sealing groove 401 is provided at the bottom of the sealing cap 4. A first sealing groove 401 is provided inside the first annular sealing groove 401. The sealing gasket 402 has its bottom end abutting against the top end of the pipe body 3, forming a seal at the connection between the sealing cap 4 and the pipe body 3. A first sealing plug 5 is provided inside the pipe body 3. The outer surface of the first sealing plug 5 abuts against the inner wall of the pipe body 3. The top surface of the first sealing plug 5 is fixedly connected to the bottom surface of the sealing cap 4. The first sealing plug 5 and the sealing gasket 4 are integrally formed. A second annular sealing groove 501 is provided on the outer surface of the first sealing plug 5. A second sealing gasket 502 is provided inside the second annular sealing groove 501. The outer wall of the second sealing gasket 502 abuts against the inner wall of the pipe body 3, and the second sealing gasket 502 forms a seal at the connection between the first sealing plug 5 and the pipe body 3.

[0019] The bottom end of the first sealing plug 5 is threadedly connected to the second sealing plug 6. The top end of the second sealing plug 6 is provided with a connecting part. The bottom end of the first sealing plug 5 is provided with a receiving groove. The outer surface of the connecting part is provided with external threads, and the inside of the receiving groove is provided with internal threads. The outer surface of the second sealing plug 6 is provided with a third annular sealing groove 601. The third annular sealing groove 601 is provided with a third sealing gasket 602. The third sealing gasket 602 abuts against the inner wall of the pipeline body 3, forming a seal at the connection between the second sealing plug 6 and the pipeline body 3. The sealing cap 4, the first sealing plug 5, and the second sealing plug 6 form a triple seal at the connection. The first sealing gasket 402, the second sealing gasket 502, and the third sealing gasket 603 form a multi-layer seal from the inside to the outside of the pipeline body 3, which makes the sealing performance better and less likely to cause the measurement results to be affected by external environmental factors due to poor sealing at the connection, thus improving the measurement accuracy.

[0020] A fourth annular sealing groove 603 is provided on the inner wall between the second sealing plug 6 and the measuring rod 2. A fourth sealing gasket 604 is provided inside the fourth annular sealing groove 603. The outer wall of the fourth sealing gasket 6 abuts against the outer surface of the measuring rod 2, forming a seal at the connection between the second sealing plug 6 and the measuring rod 2, further increasing its sealing performance.

[0021] Preferably, the outer surface of the sealing cap 4 and the pipeline body 3 is provided with an annular edging 7 that surrounds the connection between the sealing cap 4 and the pipeline body 3. The annular edging 7 surrounds the connection between the sealing cap 4 and the mounting part of the pipeline body 3, and cooperates with the first sealing plug 4 and the second sealing plug 5 to form a labyrinth-shaped structure at the connection from the inside to the outside, thereby improving its sealing performance.

[0022] Preferably, the annular edging 7 is composed of a first edging 701 and a second edging 702. Both the first edging 701 and the second edging 702 are semi-circular in structure, and the first edging 701 and the second edging 702 are fixedly connected by bolts. The top end of the annular edging 7 abuts against the periphery of the top end of the sealing cap 4, and the bottom end of the annular edging 7 abuts against the periphery of the bottom end of the mounting part of the pipeline body 3.

[0023] Preferably, the annular edging 7 is provided with a sealing gasket 8 that abuts against the outer surface of the sealing cap 4 and the pipeline body 3, and an elastic pressure-resistant body 9 that drives the side wall of the sealing gasket 8 to abut against the outer surface of the sealing cap 4 and the pipeline body 3. One side of the elastic pressure-resistant body 9 abuts against the inner side wall of the annular edging 7, and the other side abuts against the sealing gasket 8. The elastic pressure-resistant body 9 is two symmetrically arranged arc-shaped structures, with the open end of one side abutting against the inner wall of the annular edging 7 and the open end of the other side abutting against the sealing gasket 8. The elastic pressure-resistant body 9 can be made of elastic material such as TPE. When the first edging 701 and the second edging 702 surround the installation part of the sealing cap 4 and the pipeline body 3, they compress the elastic pressure-resistant body 9. The opposing force generated at both ends of the elastic pressure-resistant body 9 makes the sealing gasket 9 fit tightly against the outer surface of the sealing cap 4 and the pipeline body 3, reducing the generation of gaps and improving its sealing performance.

[0024] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A thermocouple assembly with good sealing performance, comprising a thermocouple body (1), a measuring rod (2) disposed at the bottom end of the thermocouple body (1), and a pipeline body (3) disposed below the thermocouple body (1), wherein one end of the measuring rod (2) extends into the pipeline body (3), characterized in that: The outer surface of the measuring rod (2) is provided with a sealing cover (4) which forms a closed top surface of the pipeline body (3), the bottom end of the sealing cover (4) is provided with a first annular sealing groove (401), the first annular sealing groove (401) is provided with a first sealing gasket (402) inside, the pipeline body (3) is provided with a first sealing plug (5), the top surface of the first sealing plug (5) is fixedly connected with the bottom surface of the sealing cover (4), the outer surface of the first sealing plug (5) is provided with a second annular sealing groove (501), the second annular sealing groove (501) is provided with a second sealing gasket (502) inside, the bottom end of the first sealing plug (5) is threadedly connected with a second sealing plug (6), the outer surface of the second sealing plug (6) is provided with a third annular sealing groove (601), the third annular sealing groove (601) is provided with a third sealing gasket (602) inside, the inner wall between the second sealing plug (6) and the measuring rod (2) is provided with a fourth annular sealing groove (603), and the fourth annular sealing groove (603) is provided with a fourth sealing gasket (604) inside.

2. The thermocouple assembly with good sealing performance according to claim 1, characterized in that: The outer surfaces of the first sealing plug (5) and the second sealing plug (6) abut against the inner wall of the pipeline body (3).

3. The thermocouple assembly of claim 1, wherein: The outer surfaces of the sealing cover (4) and the pipeline body (3) are provided with an annular wrapping (7) which surrounds the connecting part of the sealing cover (4) and the pipeline body (3).

4. The thermocouple assembly of claim 3, wherein: The annular wrapping (7) is composed of a first wrapping (701) and a second wrapping (702), the first wrapping (701) and the second wrapping (702) are both semicircular structures, and the first wrapping (701) and the second wrapping (702) are fixedly connected through bolts.

5. The thermocouple assembly of claim 3, wherein: The annular wrapping (7) is provided with a sealing gasket (8) which abuts against the outer surfaces of the sealing cover (4) and the pipeline body (3), and an elastic compression body (9) which drives the side wall of the sealing gasket (8) to abut against the outer surfaces of the sealing cover (4) and the pipeline body (3), one side of the elastic compression body (9) abuts against the inner wall of the annular wrapping (7), and the other side abuts against the sealing gasket (8).

6. The thermocouple assembly of claim 5, wherein: The elastic compression body (9) is composed of two symmetrical arc-shaped structures, one open end of one side abuts against the inner wall of the annular wrapping (7), and the other open end of the other side abuts against the sealing gasket (8).

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