Anti-blocking purging device for sampling pipeline of thermal instrument

Abstract

The utility model discloses a thermal instrument sampling pipeline anti-blocking purging device which comprises a purging pipe, a gas tank connecting flange is fixedly welded to the end of the purging pipe, the purging pipe is communicated with a high-pressure purging gas tank through the gas tank connecting flange, meanwhile, a sampling pipeline connecting flange is fixedly welded to the end, away from the gas tank connecting flange, of the purging pipe, and the sampling pipeline connecting flange is communicated with the high-pressure purging gas tank through the gas tank connecting flange. And the sampling pipeline connecting flange is screwed and fixed with the counter flange. According to the anti-blocking purging device for the sampling pipeline of the thermal instrument, purging gas enters the annular airflow guide-out area, so that the gas can annularly enter the sampling pipeline in a manner of being attached to the inner wall, various impurities attached to the inner wall of the sampling pipeline can be more effectively and directly purged away, the possibility of impurity residues is reduced, and the safety of the sampling pipeline is improved. The cleanliness in the pipeline is ensured; accumulation of impurities in a sampling pipeline is reduced to the maximum extent, the risk of pipeline blockage is remarkably reduced, and smooth circulation of a measurement medium is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of purging devices, and particularly to an anti-blocking purging device for a sampling pipeline of a thermal instrument. Background Technique

[0002] Before the sampling pipeline of the thermal instrument is put into use, purging is required to remove impurities and dirt in the pipeline. During installation or maintenance, impurities such as rust, welding slag, and dust may remain inside the pipeline. Purging can remove them to prevent clogging of the instrument measuring element or affecting the measurement accuracy. For example, rust particles may get stuck in the flow measurement element, resulting in deviation of the measurement result.

[0003] When purging the sampling pipeline of the thermal instrument, the purging gas enters the middle of the sampling pipeline and cannot directly act on the inner wall of the sampling pipeline where impurities adhere. Since the purging gas cannot directly impact the impurities on the inner wall, some stubborn impurities may remain on the inner wall surface of the pipeline, especially near the inlet end and the outlet end, and will gradually fall off during subsequent instrument measurements, affecting the accuracy and stability of the measurement. Content of the Utility Model

[0004] The purpose of the utility model is to provide an anti-blocking purging device for a sampling pipeline of a thermal instrument to solve the defects mentioned in the above background technique.

[0005] To achieve the above purpose, an anti-blocking purging device for a sampling pipeline of a thermal instrument is provided, including a purging pipe. A gas tank connection flange is welded and fixed at the end of the purging pipe, and the purging pipe is communicated with a high-pressure purging gas tank through the gas tank connection flange. At the same time, a sampling pipeline connection flange is welded and fixed at the end of the purging pipe away from the gas tank connection flange, and the sampling pipeline connection flange is fixedly connected with a docking flange by screwing. The end of the docking flange is welded and fixed to the sampling pipeline. A limiting disc is installed inside the purging pipe, and a diversion seat is welded and fixed at the end of the limiting disc. At the same time, a positioning seat is fixedly installed at the end of the limiting disc, and a positioning groove is opened on the inner wall surface of the purging pipe.

[0006] Preferably, two groups of positioning grooves are opened on the inner wall surface of the purging pipe, and the two groups of positioning grooves are arranged oppositely. At the same time, positioning seats are fixedly arranged at both ends of the limiting disc, and the two groups of positioning seats are arranged oppositely.

[0007] Preferably, the sizes of the positioning seat and the positioning groove are adapted to each other, and the positioning seat is inserted into the positioning groove. At the same time, the limiting disc is positioned and installed inside the purging pipe through the positioning seat and the positioning groove.

[0008] Preferably, a screwing hole is opened on the surface of the positioning seat, and two groups of oppositely arranged fixing seats are fixedly installed on the surface of the purging pipe. The sizes of the screwing hole and the fixing bolt are adapted to each other. At the same time, a through hole is opened on the fixing seat, and the fixing bolt passes through the through hole and is screwed into the screwing hole.

[0009] Preferably, the diversion seat is a conical structure made of metal material, and the limiting disk at the end of the diversion seat is a disk-shaped structure made of metal material.

[0010] Preferably, an air flow guiding area is formed between the limiting disk and the inner wall of the purging pipe, and the air flow guiding area is annularly arranged. Meanwhile, the purging pipe and the limiting disk are concentric structures.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] The purging gas enters the inside of the annular air flow guiding area, so that the gas can enter the inside of the sampling pipeline in a ring shape close to the inner wall, which can more effectively purge various impurities attached to the inner wall of the sampling pipeline, reduce the possibility of impurity residue, and ensure the cleanliness of the pipeline interior; minimize the accumulation of impurities in the sampling pipeline, significantly reduce the risk of pipeline blockage, and ensure the smooth flow of the measuring medium;

[0013] Since the impurities on the inner wall of the pipeline are completely removed, the physical parameters of the measuring medium, such as pressure, temperature and flow rate, can be more accurately transmitted to the measuring instrument, thereby improving the accuracy and stability of the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view schematic diagram of the structure of the present utility model;

[0015] Figure 2 It is a schematic diagram of the purging pipe structure of the present utility model;

[0016] Figure 3 It is the structure of the present utility model Figure 2 top view;

[0017] Figure 4 It is the structure of the present utility model Figure 2 front view;

[0018] Figure 5 It is the structure of the present utility model Figure 2 side view.

[0019] Reference numerals in the figures: 1, purging pipe; 2, air tank connection flange; 3, sampling pipeline connection flange; 4, docking flange; 5, sampling pipeline; 6, fixing seat; 7, fixing bolt; 8, positioning groove; 9, diversion seat; 10, limiting disk; 11, screw connection hole; 12, positioning seat; 13, air flow guiding area. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Please refer to Figures 1-5, the utility model provides an anti-blocking purging device for a sampling pipeline of a thermal instrument, which includes a purging pipe 1. A gas tank connection flange 2 is welded and fixed at the end of the purging pipe 1, and the purging pipe 1 is communicated with a high-pressure purging gas tank through the gas tank connection flange 2. At the same time, a sampling pipeline connection flange 3 is welded and fixed at one end of the purging pipe 1 away from the gas tank connection flange 2, and the sampling pipeline connection flange 3 is screwed and fixed with a docking flange 4. The end of the docking flange 4 is welded and fixed to the sampling pipeline 5; a limiting disk 10 is installed inside the purging pipe 1, and a diversion seat 9 is welded and fixed at the end of the limiting disk 10. At the same time, a positioning seat 12 is fixedly installed at the end of the limiting disk 10, and a positioning groove 8 is opened on the inner wall surface of the purging pipe 1.

[0021] Working principle: When in use, after the pipeline is connected, the compressed gas inside the gas tank enters the inside of the purging pipe 1. Under the flow disturbance of the diversion seat 9 and the limiting disk 10 inside the purging pipe 1, the purging gas enters the inside of the annular air flow guiding area 13, so that the gas can enter the inside of the sampling pipeline 5 in a circular shape close to the inner wall, which can more effectively blow off various impurities attached to the inner wall of the sampling pipeline 5, reduce the possibility of impurity residue, and ensure the cleanliness inside the pipeline; minimize the accumulation of impurities in the sampling pipeline 5, significantly reduce the risk of pipeline blockage, and ensure the smooth flow of the measuring medium; since the impurities on the inner wall of the pipeline are completely removed, the physical parameters of the measuring medium, such as pressure, temperature and flow rate, can be more accurately transmitted to the measuring instrument, thereby improving the accuracy and stability of the measurement.

[0022] As a preferred embodiment, two groups of positioning grooves 8 are opened on the inner wall surface of the purging pipe 1, and the two groups of positioning grooves 8 are arranged oppositely. At the same time, positioning seats 12 are fixedly arranged at both ends of the limiting disk 10, and the two groups of positioning seats 12 are arranged oppositely.

[0023] The sizes of the positioning seat 12 and the positioning groove 8 are adapted to each other, and the positioning seat 12 is inserted into the positioning groove 8. At the same time, the limiting disk 10 is positioned and installed inside the purging pipe 1 through the positioning seat 12 and the positioning groove 8.

[0024] As a preferred embodiment, a screwing hole 11 is opened on the surface of the positioning seat 12, and two groups of oppositely arranged fixing seats 6 are fixedly installed on the surface of the purging pipe 1. The sizes of the screwing hole 11 and the fixing bolt 7 are adapted to each other. At the same time, a through hole is opened on the fixing seat 6, and the fixing bolt 7 passes through the through hole and is screwed into the screwing hole 11.

[0025] The diversion seat 9 is a conical structure made of metal material, and the limiting disk 10 at the end of the diversion seat 9 is a disk-shaped structure made of metal material.

[0026] Such as Figures 1-4As shown in the figure: The flow guide seat 9 is of a conical structure. The gas impacts on the outside of the flow guide seat 9 and naturally enters the inside of the air flow outlet area 13, which can limit the air flow formed by the air flow ejected from the self-purging pipe 1. The shape of the air flow is changed from the original cylindrical shape to an annular shape.

[0027] As a preferred embodiment, an air flow outlet area 13 is formed between the limit disk 10 and the inner wall of the purging pipe 1, and the air flow outlet area 13 is annularly arranged. At the same time, the purging pipe 1 and the limit disk 10 are of a concentric circle structure.

Claims

1. A purging device for preventing blockage of a thermal instrument sampling pipeline, comprising a purging pipe (1), characterized in that: The end of the purge pipe (1) is welded and fixed with a gas tank connection flange (2), and the purge pipe (1) is connected to the high-pressure purge gas tank through the gas tank connection flange (2); at the same time, the end of the purge pipe (1) away from the gas tank connection flange (2) is welded and fixed with a sampling pipeline connection flange (3), and the sampling pipeline connection flange (3) is screwed and fixed to the docking flange (4), and the end of the docking flange (4) is welded and fixed to the sampling pipeline (5); a limit plate (10) is installed inside the purge pipe (1), and a guide seat (9) is welded and fixed to the end of the limit plate (10), and a positioning seat (12) is fixedly installed at the end of the limit plate (10), and a positioning groove (8) is provided on the inner wall surface of the purge pipe (1).

2. The anti-blocking and purging device for sampling pipeline of thermal instrument according to claim 1 is characterized in that: Two groups of positioning grooves (8) are provided on the inner wall surface of the purge pipe (1), and the two groups of positioning grooves (8) are arranged opposite to each other. At the same time, positioning seats (12) are fixedly provided at both ends of the limiting plate (10), and the two groups of positioning seats (12) are arranged opposite to each other.

3. A device for preventing and purging the sampling pipeline of a thermal instrument according to claim 2, characterized in that: The size of the positioning seat (12) matches that of the positioning groove (8), and the positioning seat (12) is inserted into the interior of the positioning groove (8), while the limiting plate (10) is positioned and installed inside the purge pipe (1) through the positioning seat (12) and the positioning groove (8).

4. The anti-blocking and purging device for sampling pipeline of thermal instrument according to claim 1 is characterized in that: The surface of the positioning seat (12) is provided with a screw hole (11), and two sets of oppositely arranged fixing seats (6) are fixedly mounted on the surface of the purge pipe (1), the screw hole (11) is adapted to the size of the fixing bolt (7), and a through hole is provided on the fixing seat (6), and the fixing bolt (7) passes through the through hole and is screwed to the inside of the screw hole (11).

5. The anti-blocking and purging device for sampling pipeline of thermal instrument according to claim 1 is characterized in that: The guide seat (9) is a conical structure made of metal material, and the limiting plate (10) at the end of the guide seat (9) is a disc-shaped structure made of metal material.

6. The anti-blocking and purging device for sampling pipeline of thermal instrument according to claim 1 is characterized in that: An airflow outlet area (13) is formed between the limiting plate (10) and the inner wall of the purge tube (1), and the airflow outlet area (13) is arranged in an annular shape, while the purge tube (1) and the limiting plate (10) are concentric circle structures.

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