CN210894267U

CN210894267U - Gas circuit heating structure of gas concentration detection device

Info

Publication number: CN210894267U
Application number: CN201921610105.3U
Authority: CN
Inventors: 查振春; 刘世胜; 于文彬; 吴渝; 郭杰
Original assignee: Hefei Gold Star M & Etechbology Development Co ltd
Current assignee: Hefei Gstar Intelligent Control Technical Co Ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2020-06-30
Anticipated expiration: 2029-09-25

Abstract

The utility model belongs to gaseous detection area, in particular to gas circuit heating structure of high temperature gas concentration detection device, including the heat preservation casing that next-door neighbour's device casing was arranged, laid the gas circulation pipeline that awaits measuring in the heat preservation casing, the gas circulation pipeline that awaits measuring includes gaseous detecting tube, and the air current entry and the side of gaseous detecting tube of the gas circulation pipeline that awaits measuring are equipped with the heating unit respectively. The utility model discloses a lay heating unit respectively in gas conveying line and the gaseous detection pipeline department of awaiting measuring, make the gas that awaits measuring can be in the target temperature all the time at transportation process and testing process to avoid gaseous composition physical state to change the influence testing result.

Description

Gas circuit heating structure of gas concentration detection device

Technical Field

The utility model belongs to gaseous detection area, in particular to gas circuit heating structure of high temperature gas concentration detection device.

Background

The gas concentration detection is widely applied to production links of combustible, explosive, toxic and polluted gases in the fields of gas, petroleum, chemical engineering, metallurgy and the like. The temperature of the gas to be detected is usually higher than the normal temperature, so that when the extraction type detection method is adopted, the sampled gas to be detected needs to be heated, and the influence of crystallization or dissolution of components in the gas to be detected on a detection result is avoided. However, the existing detection device has poor heating effect on the gas to be detected, crystals are formed in the gas circulation pipeline, the conveying efficiency of the gas to be detected is reduced, a harsh squeaking sound can be sent in the conveying process, and the accuracy of the detection result cannot be guaranteed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gas circuit heating structure of gas concentration detection device that can effectively maintain the gas temperature that awaits measuring.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a gas circuit heating structure of gas concentration detection device, includes the heat preservation casing that next-door neighbour's device casing arranged, has laid the gas circulation pipeline that awaits measuring in the heat preservation casing, and the gas circulation pipeline that awaits measuring includes gas detection pipe, and the air current entry of the gas circulation pipeline that awaits measuring and the side of gas detection pipe are equipped with the heating unit respectively.

Compared with the prior art, the utility model discloses there are following technological effect: the heating units are respectively arranged at the gas conveying pipeline to be detected and the gas detection pipeline, so that the gas to be detected can be always in the target temperature in the conveying process and the detection process, and the influence of the physical state change of gas components on the detection result is avoided.

Drawings

The contents of the description and the references in the drawings are briefly described as follows:

fig. 1 is a front view of the present invention;

FIG. 2 is a perspective view of a part of the structure of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 1;

FIG. 4 is a schematic perspective view of a filter unit;

fig. 5 is a perspective view of the first heating unit.

In the figure: 10. the device comprises a device shell, 20 a heat preservation shell, 30 a to-be-detected gas circulation pipeline, 31 a gas detection pipe, 32a filtering unit, 32a gas inlet end, 32b a filtering section, 32c a gas outlet section, 33 a connecting pipe, 34 an exhaust pipe, 40 a heating unit, 41a heating unit I, 41a upper heating block, 41b a lower heating block, 411b a heating part, 412b a connecting part and 50 a control valve.

Detailed Description

The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.

The utility model provides a gas circuit heating structure of gas concentration detection device, includes the heat preservation casing 20 that the next-door neighbour device casing 10 was arranged, has laid the gas circulation pipeline 30 that awaits measuring in the heat preservation casing 20, and the gas circulation pipeline 30 that awaits measuring includes gas detection pipe 31, and the air current inlet of the gas circulation pipeline 30 that awaits measuring and the side of gas detection pipe 31 are equipped with heating element 40 respectively.

In specific implementation, the control valve 50 is opened, the gas to be detected enters the heat preservation shell 20 from the airflow inlet and is rapidly sent into the gas detection pipe 31, after the gas detection pipe 31 is filled with the gas to be detected, the control valve 50 is closed to detect the gas concentration, and the detection gas in the gas detection pipe 31 is discharged after the detection is finished. The heating unit 30, specifically the first heating unit 41 in the embodiment, is arranged at the gas flow inlet, so that the gas to be detected can be prevented from being condensed in the pipeline conveyed to the gas detection pipe 31; the heating unit 30, specifically the second heating unit 42 in the embodiment, is disposed at the gas detecting pipe 31, so as to maintain the temperature of the gas to be detected in the gas detecting pipe 31, thereby ensuring the reliability of the gas detection.

Preferably, the first heating unit 41 is disposed on the outer side of the gas flow inlet of the gas flow pipe 30 to be measured and covers the pipe wall, that is, the first heating unit 41 is disposed around the outer side of the gas flow inlet.

Specifically, as shown in fig. 2 and 4, a filtering unit 32 is disposed at an airflow inlet of the gas circulation pipeline 30 to be measured, an air inlet section 32a and an air outlet section 32c of the filtering unit 32 have large outer diameters, a filtering section 32b located in the middle has a small outer diameter, and a first heating unit 41 is disposed in the filtering section 32b. As shown in fig. 2, the air inlet section 32a is connected to the blast pipe flange at the outside of the casing 10.

As shown in fig. 5, the first heating unit 41 includes an upper heating block 41a fixedly connected to the inner wall of the housing 10, and a lower heating block 41b is screwed below the upper heating block 41a. The upper and

lower heating blocks

41a and 41b are correspondingly arranged, the upper heating block 41a is square as a whole, the lower heating block 41b includes a heating portion 411b and a connecting portion 412b, the heating portion 411b is an arc-shaped section corresponding to the filter section 32b, the connecting portion 412b is a flat section corresponding to the upper heating block 41a, and the connecting portion 412b is connected to the upper heating block 41a by a bolt.

Preferably, as shown in fig. 1 and 2, the gas detection pipeline 31 is located below the gas flow inlet of the gas flow pipeline 30 to be detected, the gas to be detected is heated at the gas flow inlet and then is conveyed to the gas detection pipeline 31 through the connecting pipe 33, after the detection is finished, the gas is conveyed to the outside of the housing 10 through the exhaust pipe 34, and the connecting pipe 33 is located above the gas detection pipeline 31.

Preferably, the pipe diameter of the gas detection pipe 31 in the gas circulation pipe 30 to be measured is the largest, and the second plate-shaped heating unit 42 is located beside the gas detection pipe 31 and extends to the side of the connection pipe 33. In this way, the second heating unit 42 can also heat the connecting pipe 33, so as to prevent the gas to be measured from condensing in the connecting pipe 33. Specifically, the second heating unit 42 is located below the first heating unit 41 and has an avoidance portion 421 which avoids the first heating unit 41, the plate surface of the second heating unit 42 is parallel to the inner wall of the thermal insulation casing 20 and is arranged at intervals with the rear wall and the bottom plate of the thermal insulation casing 20, and the projection of the gas detection pipeline 31 on the rear wall of the thermal insulation casing 20 is located in the projection area of the second heating unit 42.

It should be further noted that the upper and lower equal directions described in the present embodiment are only used for indicating the relative position relationship of the components, and are not intended to limit the present invention, and any modifications and changes made to the present invention are within the spirit of the present invention and the scope of the claims.

Claims

1. The utility model provides a gas circuit heating structure of gas concentration detection device which characterized in that: the gas circulation device comprises a heat preservation shell (20) which is arranged next to a device shell (10), a gas circulation pipeline (30) to be detected is arranged in the heat preservation shell (20), the gas circulation pipeline (30) to be detected comprises a gas detection pipe (31), and an airflow inlet of the gas circulation pipeline (30) to be detected and the side of the gas detection pipe (31) are respectively provided with a heating unit (40).

2. The gas circuit heating structure of the gas concentration detection apparatus according to claim 1, characterized in that: the first heating unit (41) is arranged on the outer side of the pipeline at the airflow inlet of the gas circulation pipeline (30) to be detected and covers the pipeline wall body.

3. The gas circuit heating structure of the gas concentration detection apparatus according to claim 2, characterized in that: the airflow inlet of the gas circulation pipeline (30) to be measured is provided with a filtering unit (32), the outer diameters of the gas inlet section (32a) and the gas outlet section (32c) of the filtering unit (32) are large, the outer diameter of the filtering section (32b) in the middle is small, and the filtering section (32b) is arranged on the first heating unit (41).

4. The gas circuit heating structure of the gas concentration detection apparatus according to claim 3, characterized in that: the first heating unit (41) comprises an upper heating block (41a) fixedly connected with the inner wall of the shell (10), and a lower heating block (41b) is connected below the upper heating block (41a) in a threaded manner; the upper heating block (41a) and the lower heating block (41b) are arranged correspondingly, the upper heating block (41a) is integrally square, the lower heating block (41b) comprises a heating part (411b) and a connecting part (412b), the heating part (411b) is an arc-shaped section corresponding to the filtering section (32b), and the connecting part (412b) is a flat section corresponding to the upper heating block (41 a).

5. The gas circuit heating structure of the gas concentration detection apparatus according to claim 1, characterized in that: the gas detection pipe (31) is located below an airflow inlet of a gas circulation pipeline (30) to be detected, gas to be detected is heated at the airflow inlet and then is conveyed to the gas detection pipe (31) through the connecting pipe (33), after detection is finished, the gas is conveyed to the outside of the shell (10) through the exhaust pipe (34), and the connecting pipe (33) is located above the gas detection pipe (31).

6. The gas circuit heating structure of the gas concentration detection apparatus according to claim 5, characterized in that: the pipe diameter of the gas detection pipe (31) in the gas circulation pipeline (30) to be detected is the largest, and the plate-shaped heating unit II (42) is positioned at the side of the gas detection pipe (31) and extends to the side where the connecting pipe (33) is positioned.

7. The gas circuit heating structure of the gas concentration detection apparatus according to claim 6, characterized in that: the second heating unit (42) is located below the first heating unit (41) and is provided with an avoidance part (421) avoiding the first heating unit (41), the plate surface of the second heating unit (42) is parallel to the inner wall of the heat preservation shell (20) and is arranged at intervals with the rear wall and the bottom plate of the heat preservation shell (20), and the projection of the gas detection pipe (31) on the rear wall of the heat preservation shell (20) is located in the projection area of the second heating unit (42).