CN216900343U

CN216900343U - Oxygen analyzer probe protection device

Info

Publication number: CN216900343U
Application number: CN202123221084.6U
Authority: CN
Inventors: 张少强
Original assignee: Wisdri Engineering and Research Incorporation Ltd
Current assignee: Wisdri Engineering and Research Incorporation Ltd
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2022-07-05
Anticipated expiration: 2031-12-21

Abstract

The utility model relates to a probe protection device of an oxygen analyzer, which comprises at least one sampling inlet passage, wherein each sampling pipeline is provided with a first inlet passage and a second inlet passage; the sample introduction pipeline is connected with a first inlet of the electric three-way ball valve, and an outlet of the electric three-way ball valve is connected with the micro-oxygen sensor; still blow the pipeline including a nitrogen gas, the anterior segment that the pipeline was blown to the nitrogen gas is provided with a two-way ball valve and a filtration relief pressure valve, and the back end that the pipeline was blown to the nitrogen gas is connected with the second inlet circuit of electronic tee bend ball valve, and is provided with a filtration relief pressure valve on the pipeline that the pipeline was blown to the nitrogen gas was connected with electronic tee bend ball valve, and it can be when oxygen content is too high, uses the nitrogen gas after the secondary decompression to carry out the blowback to oxygen battery automatically.

Description

Oxygen analyzer probe protection device

Technical Field

The utility model relates to the field of atmosphere online analysis, in particular to a probe protection device of an oxygen analyzer, which is suitable for automatic protection of a micro-oxygen battery and protection of a similar micro-gas component analysis sensor.

Background

In a continuous annealing and galvanizing heating furnace, online detection of the furnace atmosphere is very important. The micro-oxygen analyzer can detect the oxygen content in the furnace in real time, not only can ensure the process requirement of the strip steel in the annealing process, but also ensures the safety under the condition that the furnace gas contains hydrogen. However, because the micro oxygen cell in the micro oxygen analyzer is a consumption element and has a very fast consumption speed in an oxygen-enriched environment, if the micro oxygen cell is communicated with the atmosphere, the micro oxygen cell will fail quickly, so that the oxygen analyzer needs to be protected when the unit is overhauled, and once a person discovers and maintains the micro oxygen cell untimely, the micro oxygen cell can cause irreparable damage to the sensor.

The existing oxygen analyzer mainly comprises a sampling part, an analyzing part and a displaying part, wherein the sampling part not only utilizes an air pump to pump sample gas into a cabinet, but also controls the switching and the on-off of a flow path. Taking a micro-oxygen multi-path routing inspection analyzer as an example (the gas path principle is shown in fig. 1), the purge nitrogen enters the pneumatic valve control box after being decompressed by the filtering and pressure reducing valve 2, and the pneumatic valve control box uniformly controls the action of the pneumatic valve 3 on each flow path. The protection means commonly used for the micro oxygen battery of the micro oxygen multi-path inspection analyzer in the factory at present is to utilize nitrogen to carry out manual back flushing on the sampling tube, the manual three-way ball valve 6 is switched to the nitrogen purging action, the flow of the purged nitrogen needs to be adjusted at the flow meter 7, because the manual back flushing needs manual operation, and the oxygen content in the sampling tube needs to be predicted in advance, the limitation of the operation mode is too large.

In addition, the pressure of the high-pressure nitrogen after being decompressed by the filtering and decompressing valve 2 is still 1-2 bar, if the sampling electromagnetic valve is opened in the process of carrying out back flushing on the sampling probe, the high-pressure nitrogen enters the sampling tube through the two-way ball valve, and then enters the sensor, and the possibility of damaging elements by flushing exists. Thus, conventional methods prevent oxygen enrichment from entering the sensor during manual purging, but require excessive human intervention and damage the oxygen cell during maintenance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a probe protection device of an oxygen analyzer, which can automatically back blow an oxygen battery by using nitrogen after decompression when the oxygen content is too high.

The specific scheme is as follows:

a probe protection device of an oxygen analyzer comprises at least one sampling inlet passage, wherein each sampling pipeline is provided with a first inlet passage and a second inlet passage, the first inlet passages of all the sampling inlet passages are connected in parallel and then communicated with a sampling pipeline, and the second inlet passages of all the sampling inlet passages are connected in parallel and then communicated with a diffusion pipeline; the sample inlet pipeline is connected with a first inlet of the electric three-way ball valve, a sample gas suction pump is arranged on the sample inlet pipeline, and an outlet of the electric three-way ball valve is connected with the micro-oxygen sensor; still sweep the pipeline including one and diffuse the pipeline and a nitrogen gas, the sample admission passage with diffuse the pipeline and be connected, just it diffuses the aspiration pump to be provided with on the pipeline, the anterior segment that nitrogen gas swept the pipeline is provided with a two-way ball valve and one and filters the relief pressure valve, and the back end that nitrogen gas swept the pipeline is connected with the second admission passage of electronic tee bend ball valve, and is provided with one on the pipeline that nitrogen gas sweeps pipeline and electronic tee bend ball valve and filters the relief pressure valve, sweeps the nitrogen gas and sweeps the filter relief pressure valve on the anterior segment of pipeline and the pipeline that electronic tee bend ball valve is connected through nitrogen gas and blow into little oxygen analysis sensor after carrying out the secondary decompression with crossing the filter relief pressure valve on the pipeline that nitrogen gas swept the pipeline and is connected with electronic tee bend ball valve.

Furthermore, each first inlet of each sampling pipeline is provided with a two-way air valve before the first inlet is converged, and each second inlet of each sampling pipeline is also provided with a two-way air valve before the second inlet is converged.

Furthermore, the rear section of the nitrogen purging pipeline is also connected with a pneumatic valve control box, and the pneumatic valve control box is connected with each two-way pneumatic valve.

Furthermore, a filtering pressure reducing valve is arranged on a pipeline connecting the nitrogen purging pipeline and the pneumatic valve control box.

Furthermore, the electric three-way ball valve is connected with an HMI control system, and a flow meter, a two-way ball valve and a fine filter are sequentially arranged between the outlet of the electric three-way ball valve and the micro-oxygen sensor along the flow direction of the gas to be detected.

Compared with the prior art, the oxygen analyzer probe protection device provided by the utility model has the following advantages: the oxygen analyzer probe protection device provided by the utility model performs secondary nitrogen decompression on the nitrogen purging pipeline to ensure that the purged nitrogen enters the sensor in a low-pressure state so as to ensure that the purged nitrogen has lower pressure and cannot damage the micro-oxygen analysis sensor; in addition, the electric three-way ball valve can be operated in a remote HMI control mode, can realize automatic purging of the micro-oxygen analysis sensor, and is a necessary way for realizing the development of a factory to intellectualization and unmanned.

Drawings

Fig. 1 shows a schematic gas circuit principle layout diagram of a conventional micro-oxygen multi-path routing inspection analyzer.

Fig. 2 shows a schematic gas circuit principle layout diagram of the micro-oxygen multi-path routing inspection analyzer provided by the utility model.

Detailed Description

To further illustrate the various embodiments, the utility model provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the utility model and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. The components in the drawings are not necessarily to scale, and similar reference numerals are generally used to identify similar components.

The utility model will now be further described with reference to the accompanying drawings and detailed description.

As shown in fig. 2, the present embodiment provides an oxygen analyzer probe protection device that is suitable for automatic protection of a micro oxygen battery and also suitable for similar protection of a micro gas component analysis sensor. In the embodiment, a micro-oxygen multi-path inspection analyzer is taken as an example to illustrate, the micro-oxygen multi-path inspection analyzer comprises n sampling inlet paths, wherein n is greater than or equal to 2, each sampling pipeline is provided with a first inlet path and a second inlet path, the first inlet paths of all the sampling inlet paths are connected in parallel and converged to a sampling pipeline 10, the second inlet paths of all the sampling inlet paths are connected in parallel and converged to a diffusing pipeline 11, each first inlet path of each sampling pipeline is provided with a two-level air valve 3 before being converged, and each second inlet path of each sampling pipeline is also provided with a two-level air valve 3 before being converged to respectively control gas in each sampling pipeline to flow to the sampling pipeline 10 or to flow to the diffusing pipeline 11. The diffusing pipe 11 is provided with a diffusing pump 12 so that the gas in the second inlet of each sampling pipe can be pumped out by the diffusing pump 12.

Sample introduction pipeline 10 is connected with the first route of electronic tee bend ball valve 9, and is provided with dehumidifier 4 and sample gas aspiration pump 5 on sample introduction pipeline 10, and the way of going out of electronic tee bend ball valve 9 is connected with little oxygen sensor, and is provided with flowmeter 7, two-way ball valve 1 and fine filter 8 according to the preface along the flow direction of the gas that awaits measuring between the way of going out of electronic tee bend ball valve 9 and little oxygen sensor, and the gas after little oxygen sensor detects diffuses to the outer atmosphere of cabinet through the pipeline.

This little oxygen multichannel patrols and examines analysis appearance still is equipped with nitrogen gas and sweeps pipeline 13, nitrogen gas sweeps the anterior segment of pipeline 13 and is provided with a two-way ball valve 1 and a filtering pressure reducing valve 2, nitrogen gas sweeps the back end of pipeline 13 and is connected with pneumatic valve control box and electronic three-way ball valve 9's second inlet circuit respectively, and sweep on the pipeline that pipeline 13 and electronic three-way ball valve 9 are connected and nitrogen gas sweeps the pipeline that pipeline 13 and pneumatic valve control box are connected and all be provided with a filtering pressure reducing valve 2, pneumatic valve control box is connected with two-way pneumatic valve 3, with the action of control two-way pneumatic valve 3.

When the micro-oxygen multi-path inspection analyzer is in a working state of sample gas analysis, the first inlet of the electric three-way ball valve 9 is connected, the second inlet is closed, the sample gas suction pump 5 is opened at the moment, the bleeding suction pump 12 is closed, gas in the sampling inlet is conveyed to the micro-oxygen sensor by the sample gas suction pump 5 to be detected, and the gas after detection is discharged through the bleeding pipeline.

This little oxygen multichannel patrols and examines analysis appearance is in when sweeping the state, the first route of electronic tee bend ball valve 9 is closed, the second route is put through, sample gas aspiration pump 5 is closed this moment, diffuse aspiration pump 12 and open, sweep nitrogen gas through nitrogen gas sweep behind the first decompression of the filtration relief pressure valve 2 on the anterior segment of pipeline 13, sweep through nitrogen gas filter relief pressure valve 2 on the pipeline that pipeline 13 and electronic tee bend ball valve 9 are connected and carry out the secondary decompression after being blown into little oxygen analysis sensor, in order to guarantee to sweep nitrogen gas and have lower pressure and can not lead to the fact the damage to little oxygen analysis sensor.

In addition, because the electric three-way ball valve 9 can be operated in a remote HMI control mode, when the oxygen content is detected to be too high, the electric three-way ball valve 9 can automatically act to switch the sampled gas and lead the decompressed low-pressure nitrogen to the micro-oxygen analysis sensor, meanwhile, the sample gas suction pump 5 is closed, and the diffusion suction pump 12 is opened; when low-pressure nitrogen is blown in, the oxygen content is reduced, when the oxygen content is reduced to a certain set value, the electric three-way ball valve 9 switches the introduction of the sample gas again, meanwhile, the sample gas suction pump 5 is started, and the bleeding suction pump 12 is closed, so that the automatic purging of the micro-oxygen analysis sensor is realized.

The remote HMI control mode can be operated by setting "auto purge" and "manual purge" button selections on the HMI, and when in the "auto purge" state, the analyzer operates as: when the oxygen content of a certain path is larger than a set value (for example, 1000ppm), the analyzer enters a purging state; when the oxygen level is purged below the set point (e.g., 500ppm), the purge to the sensor is turned off and the analyzer enters a sample gas analysis state.

And under the condition that the remote signal is in a manual purging mode, purging is started for the oxygen sensor until the manual purging mode is cancelled. If the automatic purging and the manual purging are not selected, the analyzer always keeps the sample gas analysis state and does not react to the change of the oxygen content.

Repeating the steps, if the oxygen content is detected within a certain time, judging that the atmosphere is abnormal or the sampling tube leaks, automatically switching to remote manual purging, stopping routing inspection analysis, and requiring maintenance personnel to go to the site for inspection. Under the long-range manual mode of sweeping, electronic tee bend ball valve can continue to let in nitrogen gas into the sensor always, sweeps the oxygen battery for a long time. By doing so, automatic and timely switching when the oxygen content is too high is met, and remote manual purging can be selected manually.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The utility model provides an oxygen analysis appearance probe protection device which characterized in that: the sampling device comprises at least one sampling inlet passage, each sampling pipeline is provided with a first inlet passage and a second inlet passage, the first inlet passages of all the sampling inlet passages are connected in parallel and converged and then communicated with a sample injection pipeline, the second inlet passages of all the sampling inlet passages are connected in parallel and converged and then communicated with a bleeding pipeline, and a bleeding air pump is arranged on the bleeding pipeline; the sample inlet pipeline is connected with a first inlet of the electric three-way ball valve, a sample gas suction pump is arranged on the sample inlet pipeline, and an outlet of the electric three-way ball valve is connected with the micro-oxygen sensor; still sweep the pipeline including a nitrogen gas, the anterior segment that nitrogen gas sweeps the pipeline is provided with a two-way ball valve and a filtration relief pressure valve, and the back end that nitrogen gas sweeps the pipeline is connected with the second inlet circuit of electronic tee bend ball valve, and is provided with a filtration relief pressure valve on the pipeline that nitrogen gas sweeps pipeline and electronic tee bend ball valve be connected, sweeps the filtration relief pressure valve on the anterior segment that nitrogen gas sweeps the pipeline and crosses the filtration relief pressure valve on the pipeline that nitrogen gas sweeps pipeline and electronic tee bend ball valve be connected and carry out the secondary decompression and then blow into little oxygen analysis sensor.

2. The oxygen analyzer probe protection device of claim 1, wherein: each first inlet of each sampling pipeline is provided with a two-way air valve before the first inlet is converged, and each second inlet of each sampling pipeline is also provided with a two-way air valve before the second inlet is converged.

3. The oxygen analyzer probe protection device of claim 2, wherein: the rear section of the nitrogen purging pipeline is also connected with a pneumatic valve control box, and the pneumatic valve control box is connected with each two-way pneumatic valve.

4. The oxygen analyzer probe protection device of claim 3, wherein: and a filtering pressure reducing valve is arranged on a pipeline connecting the nitrogen purging pipeline and the pneumatic valve control box.

5. The oxygen analyzer probe protection device of claim 1, wherein: the electric three-way ball valve is connected with the HMI control system in a signal mode, and a flow meter, a two-way ball valve and a fine filter are sequentially arranged between the outlet of the electric three-way ball valve and the micro-oxygen sensor along the flow direction of gas to be detected.