CN116046507A

CN116046507A - Gas detection alarm system and method

Info

Publication number: CN116046507A
Application number: CN202310037935.6A
Authority: CN
Inventors: 周清峰; 陈哲思; 廖树伟; 何颂贤; 訾云龙; 丘勇才
Original assignee: Ai Gan Technology Guangdong Co ltd
Current assignee: Ai Gan Technology Guangdong Co ltd
Priority date: 2022-07-12
Filing date: 2023-01-10
Publication date: 2023-05-02
Also published as: CN116046990A; CN116008472A; CN116046477A; CN115932182A; CN116840340A

Abstract

The invention relates to a gas detection alarm system and a method, which aim at the defect that the existing single sensor cannot accurately detect whether specific components exist in gas or not, and the gas detection alarm system comprises a pipe body for guiding the directional flow of the gas, wherein the pipe body comprises a first pipe body and a third pipe body which are used for arranging a sensor unit for detecting the specific components in the gas, a second pipe body is arranged between the first pipe body and the third pipe body, and a filter assembly capable of filtering the specific components in the gas is detachably arranged in the second pipe body; under the condition that the difference between the gas detection data of the sensor units arranged in the first tube body and the gas detection data of the sensor units arranged in the third tube body cannot be in a preset threshold value, the system can send out early warning, so that inspection personnel are reminded of carrying out state detection or replacement maintenance on the filter assembly, and the two sensor units can acquire the effective content of specific components in gas in a differential response mode.

Description

Gas detection alarm system and method

Technical Field

The invention relates to the technical field of gas detection, in particular to a gas detection alarm system and a gas detection alarm method.

Background

In recent years, with the development of harmonic detection technology based on tunable semiconductor laser absorption spectroscopy (Tunable diode laser absorption spectroscopy, TDLAS), a laser methane detection method is becoming an important detection means for measuring gas. Compared with the traditional detection method, the laser methane detection method has the advantages of good real-time performance, long service life, high accuracy, no need of frequent calibration and the like. In laser methane detection, a photoelectric detection module for methane gas detection is an important component of a laser methane sensor, and can realize the self-calibration function of matching a laser spectral line with a methane absorption spectral line by matching a signal processing method, so that the stability of long-term operation of a sensing system is improved. In places such as underground pipelines, mines and outdoor gas pipe networks, methane can be leaked, methane is inflammable and explosive gas, accidents often occur due to the lag of detection technology and management level, huge loss is caused to economy, bad social influence is caused, and pollution is caused to the environment. Therefore, in order to ensure life and property safety, it is necessary to detect the gas in such a place in real time during the operation.

In order to ensure safe production and social stability, it is imperative to detect leakage of methane gas in a region to be detected, and in the existing various systems for detecting the concentration of methane gas in the region to be detected, compared with detection devices such as infrared detection devices and thermosensitive detection devices, the laser detection device has higher selectivity on gas, and is prevented from being interfered by other gases, water vapor, dust and the like. In the traditional laser detection method, a laser emitting end and a laser receiving end are arranged on two sides, so that a long range is required for ensuring the accuracy of methane gas concentration detection, namely, the laser emitting end and the laser receiving end are required to be separated by a long distance, and the measurement is inconvenient.

U.S. patent No.6477906 discloses a sampling system for capturing samples of trace elements in the atmosphere that includes a multi-port valve connected to a plurality of adsorption tubes. The multiport valves are connected and operated in a predetermined sequence to establish fluid passages through the multiport valves, thereby directing air samples into one of the sorbent tubes at a given time and over a given time interval.

U.S. patent No.5500369 discloses a hand-held portable sampler that uses a vacuum to introduce an air stream into an air chamber and around a baffle. The baffle is mounted substantially across the airflow pattern and is configured to disrupt the airflow such that particles in the air impinge on the media material contained in the incubator.

However, the above-mentioned prior art all adopts single detection module to carry out the detection of appointed composition, however gaseous composition is complicated various generally, single detection module can't be applicable to high-efficient and accurate detection demand, especially certain composition can take place the false detection, lead to actual testing result and true circumstances to be inconsistent, in addition, be directly to current sampling mode and carry out the gas detection, this application is through setting up filter assembly and come the separation to gaseous composition in the passageway of gaseous directional flow, make detection module can obtain specific composition information effectively, especially this application can also carry out the comparison with the testing result of gaseous specific composition before and after filtering and verify and calibrate the testing result, make the gas detection can be accomplished more accurately to the system, thereby can in time report to the police when specific composition surpasses the settlement threshold value. The application can also judge the service condition of the filter assembly by utilizing the difference of the detection results of the two detection modules with the upstream-downstream relationship, so that the filter assembly which is damaged or can not be effectively filtered can be replaced in time according to the detection results, and the system can continuously detect the gas.

Furthermore, there are differences in one aspect due to understanding to those skilled in the art; on the other hand, as the inventors studied numerous documents and patents while the present invention was made, the text is not limited to details and contents of all that are listed, but it is by no means the present invention does not have these prior art features, the present invention has all the prior art features, and the applicant remains in the background art to which the rights of the related prior art are added.

Disclosure of Invention

In order to overcome the defects in the prior art, the technical scheme of the invention provides a gas detection alarm system, which comprises a pipe body for guiding gas to flow directionally, wherein the pipe body comprises a first pipe body and a third pipe body which are used for arranging a sensor unit for detecting specific components in the gas, a second pipe body is arranged between the first pipe body and the third pipe body, and a filter assembly capable of filtering out the specific components in the gas is detachably arranged in the second pipe body; under the condition that the difference between the gas detection data of the sensor units arranged in the first tube body and the gas detection data of the sensor units arranged in the third tube body cannot be in a preset threshold value, the system can send out early warning, so that inspection personnel are reminded of carrying out state detection or replacement maintenance on the filter assembly, and the two sensor units can acquire the effective content of specific components in gas in a differential response mode. The system has the advantages that the running state of the system is detected by comparing the detection results between the two sensor units and the relation between the detection results and the preset threshold value, so that the system can acquire a relatively accurate detection result in real time, false alarms caused by element damage or abnormal operation of the system are avoided, and the system can timely send maintenance alarms/element replacement alarms according to the comparison results so as to remind patrol personnel to timely make countermeasures and equipment maintenance treatment.

According to a preferred embodiment, the detection of the status of the filter assembly comprises continuously analyzing the detection results of the sensor units respectively arranged in the first tube body and the third tube body and periodically testing the system in a test mode, so as to judge the use status of the filter assembly and whether replacement maintenance is required according to the detection results and/or the test results. The system has the advantages that aiming at the defect that error detection possibly exists in real-time detection data, the working states of the system and the filtering component are verified by setting a periodical testing mechanism, so that whether the source of abnormal operation of the system is the filtering component or the sensor unit is effectively analyzed and judged.

According to a preferred embodiment, the detection result means that when the first sensor unit in the first pipe body makes a detection response and the second sensor unit in the third pipe body does not make a detection response, the system gives an alarm signal to prompt the inspection personnel that the filtering component arranged in the pipe body works abnormally. The gas component detection device has the advantages that the gas component detection is carried out by arranging the differential type double-sensor unit, so that the detection result is more accurate, and the inspection personnel can be helped to grasp abnormal conditions such as breakage and the like of the gas pipeline more timely.

According to a preferred embodiment, the test result means that the inspection personnel adjusts the working mode of the system to a test mode, and tests the filtering assembly by introducing alcohol gas into the pipe body, wherein the first sensor unit in the first pipe body and the second sensor unit in the third pipe body respond, and the filtering assembly is judged to have abnormal working.

According to a preferred embodiment, the filter assembly is removably mounted in the second tube and the second tube is formed by splicing two arcuate plates, so that the filter assembly can be placed in a lumen defined by the second tube when the two arcuate plates are not engaged, and the filter assembly can then selectively filter out non-specific components of the gas flowing through the second tube.

According to a preferred embodiment, the filter assembly comprises a housing and a filter tube provided in the housing, wherein the filter tube enables non-specific components in the gas to be separated by varying the flow rate and flow rate of the gas flowing into its passage a plurality of times, thereby enabling the second sensor unit to accurately detect whether the specific components are contained in the gas or not, to verify the detection result of the first sensor unit.

According to a preferred embodiment, the filtering pipeline changes the flow velocity and flow rate of the gas in the channel by arranging a plurality of sections of mixed flow channels and split flow channels at intervals, and the filtering pipeline is streamline in whole, so that the gas flowing from the first pipe body at the upstream position can quickly pass through the filtering component; the gas in the mixed flow channel can be split when entering the split flow channel, so that the distribution condition of the internal components of the gas is changed, and a plurality of gas flows out of the split flow pipeline can be mixed in the mixing pipeline, so that component mixing reaction or particle collision of the plurality of gas occurs in the mixing process, the distribution condition of the internal components of the gas is changed again, and the state of the gas can be continuously changed by using the filtering pipeline which is spliced alternately.

According to a preferred embodiment, when the movement state of the gas in the filter passage is changed, the movement of the component particles in the gas flow formed by the directional flow of the gas is accelerated by the change of the position of the component particles in the gas flow following the flow of the gas flow, so that the unspecific component contained in the gas can be accelerated to permeate the pipe wall of the filter pipe and be adsorbed by the adsorption unit between the housing and the filter pipe, so that the gas flowing out of the filter pipe can be accurately measured by the second sensor unit for the specific component.

The technical scheme of the invention also provides a gas detection alarm method, which comprises the following steps:

the gas filtering device comprises a first pipe body, a second pipe body and a third pipe body which are sequentially arranged along the gas flow direction, wherein sensor units capable of detecting specific components contained in the gas are arranged in the first pipe body and the third pipe body, and a filter assembly capable of filtering non-specific components contained in the gas is arranged in the second pipe body;

under the condition that the difference between the gas detection data of the sensor units arranged in the first tube body and the gas detection data of the sensor units arranged in the third tube body cannot be in a preset threshold value, the system can send out early warning, so that inspection personnel are reminded of carrying out state detection or replacement maintenance on the filter assembly, and the two sensor units can acquire the effective content of specific components in gas in a differential response mode.

According to a preferred embodiment, the detection of the status of the filter assembly comprises continuously analyzing the detection results of the sensor units respectively arranged in the first tube body and the third tube body and periodically testing the system in a test mode, so as to judge the use status of the filter assembly and whether replacement maintenance is required according to the detection results and/or the test results.

Drawings

FIG. 1 is a schematic diagram of a preferred gas detection alarm system according to the present invention;

fig. 2 is a schematic diagram of a filter assembly of a preferred gas detection alarm system according to the present invention.

List of reference numerals

1: a tube body; 2: a sensor unit; 3: a filter assembly; 4: an analysis control unit; 11: a first tube body; 12: a second tube body; 13: a third tube body; 14: a micro air pump; 21: a first sensor unit; 22: a second sensor unit; 31: a housing; 32: a filter tube; 33: and an adsorption unit.

Detailed Description

The following detailed description refers to the accompanying drawings.

Example 1

The application provides a gas detection alarm system, which comprises a pipe body 1, a sensor unit 2, a filtering component 3 and an analysis control unit 4.

According to a specific embodiment shown in fig. 1, the pipe body 1 is manufactured in a multi-segment spliced manner, and different modules are respectively arranged in the multi-segment pipes of the pipe body 1, so that the gas flowing along the pipe direction of the pipe body 1 can be detected by the sensor unit 2 and filtered by the filter assembly 3. The pipe body 1 is constituted by at least three pipes, and a sensor unit 2 capable of detecting specific components of the gas flowing into the pipe body 1 and the gas flowing out of the pipe body 1, respectively, is installed in both of the two pipes as an inlet pipe and an outlet pipe. A pipe for installing the filter assembly 3 is further provided between the gas inlet pipe and the gas outlet pipe, and the filter assembly 3 provided in the pipe can filter out unspecific components of the gas flowing into the pipe 1, so that the sensor unit 2 for detecting specific components of the gas flowing out of the pipe 1 can obtain real content information of the specific components, and the analysis control unit 4 can judge whether an alarm is required or not according to the detection results of the two sensor units 2. Both sensor units 2 located within the pipeline 1 are able to transmit the result information of their detection to the analysis control unit 4. The analysis control unit 4 can give an alarm according to the comparison result between the detection result and the preset threshold value, and the analysis control unit 4 can also judge the working condition of the filtering component 3 through the threshold value comparison mode, so that when the detection result is not within the preset threshold value range, the filtering component 3 is judged to have abnormal working, and then an alarm prompt is sent to the patrol personnel.

Preferably, the tube 1 includes a first tube 11, a second tube 12 and a third tube 13. One end of the first pipe body 11 is in threaded connection with one end of the second pipe body 12, and one end of the second pipe body 12, which is far away from the first pipe body 11, is in threaded connection with the third pipe body 13. Preferably, the sensor units 2 are installed in the first pipe body 11 and the third pipe body 13, the first pipe body 11, the second pipe body 12 and the third pipe body 13 are sequentially connected in series, and no air leakage gap exists on the pipe body 1 formed by the connection in series. Preferably, a closable opening is provided in the side wall of the second tube 12, so that the filter assembly 3 can be placed in the second tube 12 or removed from the second tube 12 under the action of a inspector. Preferably, the opening is connected with an arc-shaped baffle which can be used for sealing the opening, and a sealing ring is arranged on the edge outline of the opening, so that when the opening is plugged by the arc-shaped baffle, the sealing ring can fill a gap possibly existing between the arc-shaped baffle and the opening, thereby ensuring the tightness of the second pipe body 12. Preferably, the output end of the third tube 13 is further provided with a micro air pump 14 capable of promoting the formation of a directional flow of the gas inside the tube and accelerating the flow rate of the gas flow. The micro air pump 14 is in signal connection with the analysis control unit 4, so that the micro air pump 14 can perform air suction operation according to a working instruction sent by the analysis control unit 4, and the air in the pipe body 1 can flow in an accelerating manner.

Preferably, the sensor unit 2 comprises a first sensor unit 21 and a second sensor unit 22. The first sensor unit 21 is provided in the first pipe 11 and is capable of detecting a specific component such as methane in the gas flowing into the pipe 1, but since the gas is not subjected to the filtering process, the first sensor unit 21 interferes with the detection result when detecting the specific component such as methane, and therefore the component content detected by the first sensor unit 21 is generally higher than the actual content, and therefore, in order to improve the detection accuracy, the second pipe 12 having the filter unit 3 capable of analyzing the gas component is provided downstream of the first pipe 11, and the second sensor unit 22 capable of detecting the component of the gas flowing out of the pipe 1 is provided downstream of the second pipe 12. The second sensor unit 22 can detect the concentration of a specific component such as methane in the gas from which the interfering component is removed, thereby obtaining accurate component content information. Preferably, in the case that the difference between the gas detection data acquired by the first sensor unit 21 disposed in the first pipe body 11 and the gas detection data acquired by the second sensor unit 22 disposed in the third pipe body 13 cannot be within a preset threshold range, the system sends out an early warning according to the comparison result, so as to remind the inspection personnel to perform state detection or replacement maintenance on the filter assembly 3, and the two sensor units 2 can acquire the effective content of the specific component in the gas in a differential response mode. Specifically, the concentration of the specific component collected by the first sensor unit 21 is 0.1, the concentration of the specific component collected by the second sensor unit 22 is 0.001, and the first sensor unit 21 and the second sensor unit 22 use the same type of sensor, and the preset influence value of the interference component is 0.099, which indicates that the specific component in the target gas is mainly composed of moisture, ethanol, and the like, such polar molecules can be effectively filtered out by the filter assembly 3, and the gas does not contain a sufficient amount of the specific component which can be effectively detected, so that the second sensor unit 22 cannot obtain the concentration of the specific component. Preferably, when the concentration of the specific component collected by the first sensor unit 21 is 0.2, the concentration of the specific component collected by the second sensor unit 22 is 0.101, and the sensors of the same type are used by the first sensor unit 21 and the second sensor unit 22, and the preset influence value of the interference component is 0.099, it is indicated that the target gas actually contains the specific component such as methane, and the concentration of the specific component can be calculated according to the detection result of the second sensor unit 22 and the content detection data of the related interference component, and by comparing the methane concentration obtained by the final analysis and calculation with the preset concentration threshold, the system gives an alarm when the methane concentration exceeds the preset threshold, so as to remind the inspector of gas leakage detection of the gas pipe network. Preferably, when the concentration of the specific component collected by the first sensor unit 21 is 0.2, the concentration of the specific component collected by the second sensor unit 22 is 0.111, and the sensors of the same type are used by the first sensor unit 21 and the second sensor unit 22, the preset influence value of the interference component is 0.099, which indicates that the target gas does contain the specific component such as methane, and the filtering component 3 may not be capable of effectively filtering the interference component in the gas, the filtered gas still contains a certain amount of interference component, so that the detection result of the specific component by the second sensor unit 22 is error, therefore, in order to correct the error, the type and concentration of the mixed gas may be calculated according to the ratio of the detection result of the first sensor unit 21 to the detection result of the second sensor unit 22, and by combining a machine learning algorithm, and historical data in a certain period. Preferably, the calculation and analysis operations are performed by the analysis control unit 4 according to the judgment criteria established in advance, various thresholds, and the real-time detection results of the first sensor unit 21 and the second sensor unit 22.

Preferably, when the detection result obtained by the second sensor unit 22 has an interference error, the analysis control unit 4 also prompts the inspection personnel to perform state detection or replacement maintenance on the filter assembly 3 in an alarm mode. The detection state of the filter assembly 3 includes continuously analyzing the detection results of the sensor units 2 respectively disposed in the first pipe body 11 and the third pipe body 13 and periodically testing the system in a test mode, so as to determine the use state of the filter assembly 3 and whether replacement maintenance is required according to the detection results and/or the test results. Preferably, the detection result means that when the first sensing unit 21 in the first pipe body 11 makes a detection response and the second sensing unit 22 in the third pipe body 13 does not make a detection response, the system gives an alarm signal to prompt the inspection personnel that the filter assembly 3 arranged in the pipe body 1 is abnormal in operation. The test result means that the inspection personnel adjusts the working mode of the system into a test mode, and tests the filter assembly 3 by introducing alcohol gas into the pipe body 1, and when the first sensing unit 21 in the first pipe body 11 and the second sensing unit 22 in the third pipe body 13 respond, the filter assembly 3 is judged to have abnormal working. Further preferably, the process of comparing and analyzing the detection results of the first sensor unit 21 and the second sensor unit 22 by the analysis control unit 4 is also real-time detection of the operation state of the filter assembly 3, so the analysis control unit 4 can judge that the operation condition of the filter assembly 3 may be abnormal when the detection results of the first sensor unit 21 and the second sensor unit 22 at a certain time point are abnormal, thereby adjusting the system to a test mode, and testing the system by injecting test gas into the pipeline 1, thereby analyzing the operation condition of the filter assembly 3. For example, when the analysis control unit 4 determines that there is an abnormality in the operation of the filter assembly 3 and that the disturbance component cannot be effectively filtered, it is determined whether the filter assembly 3 needs to be replaced by continuously injecting alcohol gas into the pipe 1 and observing whether or not the detection responses of the first sensor unit 21 and the second sensor unit 22 in the test mode occur. Specifically, when the first sensor unit 21 responds and the second sensor unit 22 does not respond, it is determined that the filter assembly 3 can also continue to be used or that damage to the second sensor unit 22 occurs. When the first sensor unit 21 and the second sensor unit 22 both respond, it is determined that the filtering component 3 cannot effectively filter out the interference components, and it is necessary for the inspection personnel to replace the filtering component 3.

Preferably, the filter assembly 3 is detachably mounted in the second tube 12, and the second tube 12 may be formed by splicing two arc plates or an opening for mounting the filter assembly 3 is formed in the tube. Preferably, the filter assembly 3 can be placed in the lumen defined by the second tubular body 12 when the two arcuate plates are not engaged. The filter assembly 3 is capable of selectively filtering out non-specific components entrained in the gas flowing through the second tube 12. As shown in fig. 2, the filter assembly 3 includes a housing 31 and a filter tube 32 disposed within the housing 31. Preferably, the filter pipe 32 causes the non-specific components in the gas to be separated by changing the flow rate and flow rate of the gas flowing into its passage a plurality of times, thereby enabling the second sensor unit 22 to detect whether the gas contains the specific components therein, to compare or verify the detection result of the first sensor unit 21.

Preferably, the filtering duct 32 changes the flow rate and flow rate of the gas in the channel by arranging a plurality of sections of mixed flow channels and split flow channels at intervals, and the filtering duct 32 is streamlined as a whole, so that the gas flowing from the first pipe body 11 at the upstream position can quickly pass through the filtering assembly 3. Preferably, the gas in the mixed flow channel can be split when entering the split flow channel, so that the distribution condition of the internal components of the gas flow formed by the directional flow of the gas is changed, and the multiple gas flows flowing out of the split flow channel can be mixed in the mixing channel, so that the component mixing reaction or particle collision of the multiple gas flows occurs in the mixing process, so that the distribution condition of the components in the gas flow is changed again, and the state of the gas flow is continuously changed by using the alternately spliced filter channels 32. Preferably, when the movement state of the air flow in the filter passage 32 is changed, the component particles carried by the air flow change along with the change of the position of the flow of the air flow, so that the movement of the component particles in the air flow is accelerated, and the unspecified component contained in the air flow can be accelerated to permeate the pipe wall of the filter passage 32, and thus be adsorbed by the adsorption unit 33 between the housing 31 and the filter passage 32, so that the air flow flowing out of the filter passage 32 can be accurately measured by the second sensor unit 22.

Specifically, the target gas can flow from the first pipe body 11 into the second pipe body 12 and then enter the filter pipe 32 of the filter assembly 3, and the disturbance gas in the target gas can pass through the filter membrane that is the pipe wall of the filter pipe 32 and be adsorbed by the adsorption unit 33 provided between the housing 31 and the filter pipe 32.

Preferably, according to the principle of "homogeneous mutual solubility", that is, polar molecules are easily soluble in polar solvents, nonpolar molecules are easily soluble in nonpolar solvents, and the filter membrane may be a nonpolar filter membrane, including a PTFE membrane, etc., which can effectively filter interference gases such as ethanol, humidity, etc. The adsorption unit 33 is made of a material having super-strong adsorption performance for nonpolar molecules such as moisture and ethanol. Preferably, the target gas and the specific components that do not pass through the pipe wall within the filter pipe 32 flow along the pipe to the third pipe body 13, thereby being captured by the second sensor unit 22.

Preferably, there are multiple ways of filtering the gas in addition to the "homogeneous mutual solubility" principle. For example, COF, MOF materials differentiate the filtered gases based on particle diameter. The adsorption tube may filter the gas based on a gas diffusion model. IMS can filter gases based on field ionization and electrostatic adsorption. Catalytic combustion may filter gases based on catalytic energy.

Preferably, the passage of the filter tube 32 is streamlined. At least one flow dividing island capable of dividing the gas in the pipeline is arranged in the pipeline of the filter pipeline 32, so that a single pipeline is divided into two parallel sub-pipelines. Specifically, the dividing island can divide the duct of the filter duct 32 into two sub-ducts, so that the gas can be divided by the front end of the mixed flow structure into two sub-airflows that respectively flow to different sub-ducts. It is further preferred that the sub-streams flowing into the sub-ducts can merge at the ends of the dividing islands after exiting the sub-ducts, so that the two sub-streams merging with each other can generate a relative impact force, causing a secondary mixing of the components in the sub-streams. Preferably, the tubes of the filter tube 32 are arranged in such a way that the longitudinal cross-section of the inner chamber thereof is undulating, i.e. the transverse cross-section of the inner chamber of the tube is varied in such a way that it gradually increases and then gradually decreases. And a flow dividing island capable of constructing two sub-pipelines in a mode of being matched with the pipeline wall of the pipeline is arranged in the region with larger transverse sectional area of the inner cavity. The flow dividing island may be arranged in a shuttle-like configuration that is capable of mating with the interior conduit chamber such that a section of the conduit having a larger cross-sectional area can be divided by the flow dividing island into two parallel sub-conduits. Preferably, the head ends of the two sub-pipelines are communicated with each other; the tail ends of the two sub-pipelines are also communicated with each other. When the sub-streams flow out of the sub-ducts, the two sub-streams meet at the end where the two sub-ducts communicate with each other. Preferably, the subducting is capable of changing the distribution of the interfering components in the gas so that the interfering components in the gas can be redistributed during the splitting/merging of the gas, increasing the probability of the interfering components coming into contact with the duct wall so that the interfering components can be more effectively separated from the gas. Preferably, the total flow rate of the two sub-pipelines is larger than that of the pipeline mixed flow section, so that the gas in the sub-pipelines accelerates the movement of gas component molecules in a splitting process and reduces the flow speed of the whole sub-gas flow, interference components in the sub-gas flow are fully contacted with the pipeline wall under the condition of keeping continuous movement, and the interference components are accelerated to permeate the pipeline wall, so that the component separation of the gas is finally realized. Preferably, the mixed flow section refers to a section of a pipe that is not separated into two subducting by a split island. The method aims at the part of the interference components which are still present in the sub-airflows and are in the gas, and the kinetic energy of the residual interference components is obtained in the secondary merging process of the two sub-airflows through the secondary merging of the two sub-airflows, so that the activity of the residual interference components in the gas is improved, the residual interference components can accelerate to pass through the pipeline wall, and the component separation of the gas is realized.

Preferably, the dividing island is streamlined and is capable of dividing the liquid in the conduit at the beginning of the streamline so that the divided two partial streams can flow along the two sub-conduits to form a sub-stream. The separate pipelines at the end positions of the streamline are communicated in a streamline manner, so that the partial gas flows in the two sub-pipelines are converged and mixed to form a first mixed gas. In the gas mixing process, the whole pipeline is narrowed, the hydraulic pressure of the gas is increased, and the micro-positive pressure of the gas is increased. In addition, during the mixing of the gases, due to the pressure and flow rate variations of the gases, the interfering components that can permeate the walls of the pipe in the gases can be absorbed by the adsorption unit 33 by accelerating the separation of the interfering components from the gases and permeating the walls of the pipe under the conditions of mixing, impacting and compressing the gases. Preferably, in the case where the gas is branched into the sub-pipes, the contact area of the gas with the pipe wall of the filtering pipe 32 increases, and the mixed state of the interfering components in the gas is re-agitated, so that the interfering components in the gas can better permeate through the pipe wall of the sub-pipe region to complete the exuded component separation. Preferably, under the condition that two split-flow gas mixing is carried out at the tail end of the sub-pipeline, the opposite flushing fusion of the gas can be accelerated, and the defect of uneven components in the gas caused by filtration is eliminated, so that the subsequent structure is convenient for separating the components of the gas. Preferably, the merging of the subduct gases may also create a vortex that is able to better transfer the higher concentration of the filterable components inside the gas to the surface of the gas, thereby accelerating through the wall of the duct that is in contact with the surface of the gas.

Example 2

This embodiment is a further improvement of embodiment 1, and the repeated contents are not repeated.

The application also provides a gas detection alarm method, which comprises the following steps:

the first pipe body 11, the second pipe body 12 and the third pipe body 13 are sequentially arranged along the gas flow direction, the sensor unit 2 capable of detecting specific components contained in the gas is arranged in the first pipe body 11 and the third pipe body 13, and the filter assembly 3 capable of filtering non-specific components contained in the gas is arranged in the second pipe body 12;

under the condition that the difference between the gas detection data of the sensor units 2 arranged in the first pipe body 11 and the gas detection data of the sensor units 2 arranged in the third pipe body 13 cannot be in a preset threshold value, the system can send out early warning, so that inspection personnel are reminded of carrying out state detection or replacement maintenance on the filter assembly 3, and the two sensor units 2 can acquire the effective content of specific components in the gas in a differential response mode.

Preferably, the detection of the state of the filter assembly 3 includes continuously analyzing the detection results of the sensor units 2 respectively disposed in the first pipe body 11 and the third pipe body 13 and periodically testing the system in a test mode, so as to determine the use state of the filter assembly 3 and whether replacement maintenance is required according to the detection results and/or the test results.

It should be noted that the above-described embodiments are exemplary, and that a person skilled in the art, in light of the present disclosure, may devise various solutions that fall within the scope of the present disclosure and fall within the scope of the present disclosure. It should be understood by those skilled in the art that the present description and drawings are illustrative and not limiting to the claims. The scope of the invention is defined by the claims and their equivalents. Throughout this document, the word "preferably" is used in a generic sense to mean only one alternative, and not to be construed as necessarily required, so that the applicant reserves the right to forego or delete the relevant preferred feature at any time.

Claims

1. A gas detection alarm system comprising a tube (1) for guiding a directional flow of a gas, characterized in that the tube (1) comprises a first tube (11) and a third tube (13) for arranging a sensor unit (2) for detecting a specific component in the gas, wherein,

a second pipe body (12) is arranged between the first pipe body (11) and the third pipe body (13), and a filter assembly (3) capable of filtering out specific components in gas is detachably arranged in the second pipe body (12);

under the condition that the difference between the gas detection data of the sensor unit (2) arranged in the first pipe body (11) and the gas detection data of the sensor unit (2) arranged in the third pipe body (13) cannot be in a preset threshold value, the system can send out early warning, so that a patrol inspector is reminded of carrying out state detection or replacement maintenance on the filter assembly (3), and the two sensor units (2) can acquire the effective content of specific components in gas in a differential response mode.

2. The gas detection alarm system according to claim 1, wherein the detection status detection of the filter assembly (3) comprises continuously analyzing the detection results of the sensor units (2) respectively arranged in the first tube (11) and the third tube (13) and periodically testing the system in a test mode, so as to determine the use status of the filter assembly (3) and whether replacement maintenance is required according to the detection results and/or the test results.

3. A gas detection alarm system according to claim 2, wherein the detection result is that when the first sensor unit (21) in the first pipe body (11) makes a detection response and the second sensor unit (22) in the third pipe body (13) does not make a detection response, the system gives an alarm signal to prompt an inspection person that the filter assembly (3) arranged in the pipe body (1) is abnormal.

4. A gas detection alarm system according to claim 3, wherein the test result is that the inspection personnel adjust the operation mode of the system to a test mode and test the filter assembly (3) by introducing alcohol gas into the pipe body (1), wherein,

and when the first sensor unit (21) in the first pipe body (11) and the second sensor unit (22) in the third pipe body (13) respond, judging that the filter assembly (3) has abnormal operation.

5. The gas detection alarm system according to claim 4, wherein the filter assembly (3) is detachably mounted in the second tube body (12), and the second tube body (12) is formed by splicing two arc-shaped plates, so that the filter assembly (3) can be placed in a tube cavity defined by the second tube body (12) when the two arc-shaped plates are not clamped, and the filter assembly (3) can selectively filter unspecified components doped in the gas flowing through the second tube body (12).

6. The gas detection alarm system according to claim 5, wherein the filter assembly (3) comprises a housing (31) and a filter tube (32) disposed within the housing (31), wherein,

the filtering pipe (32) enables the separation of non-specific components in the gas by changing the flow rate and flow rate of the gas flowing into the passage thereof a plurality of times, thereby enabling the second sensor unit (22) to accurately detect whether the gas contains specific components or not, so as to verify the detection result of the first sensor unit (21).

7. The gas detection alarm system according to claim 6, wherein the filtering duct (32) changes the flow rate and flow rate of the gas in the channel by arranging a plurality of mixed flow channels and a plurality of split flow channels at intervals, and the filtering duct (32) is streamlined as a whole so that the gas flowing in from the first pipe body (11) located at the upstream position can pass through the filtering assembly (3) quickly;

the gas in the mixed flow channel can be split when entering the split flow channel, so that the distribution condition of the internal components of the gas is changed, and a plurality of gas flows out of the split flow channel can be mixed in the mixing channel, so that component mixing reaction or particle collision of the plurality of gas occurs in the mixing process, the distribution condition of the gas which is the internal components is changed again, and the state of the gas can be continuously changed by using the filtering channels (32) which are spliced alternately.

8. The gas detection alarm system according to claim 7, wherein when a movement state of the gas in the filter passage (32) is changed, component particles in the gas flow formed by directional flow of the gas are changed in position along with the flow of the gas flow, and movement of the component particles in the gas flow is accelerated so that unspecific components contained in the gas can be accelerated to permeate a pipe wall of the filter passage (32) and be adsorbed by an adsorption unit (33) between the housing (31) and the filter passage (32), so that the gas flowing out of the filter passage (32) can be accurately measured by the second sensor unit (22).

9. A gas detection alarm method, comprising:

the gas filtering device comprises a first pipe body (11), a second pipe body (12) and a third pipe body (13) which are sequentially arranged along the gas flow direction, wherein a sensor unit (2) capable of detecting specific components contained in gas is arranged in the first pipe body (11) and the third pipe body (13), and a filtering component (3) capable of filtering non-specific components contained in gas is arranged in the second pipe body (12);

10. The gas detection alarm method according to claim 9, wherein the detection status detection of the filter assembly (3) comprises continuously analyzing the detection results of the sensor units (2) respectively provided in the first pipe body (11) and the third pipe body (13) and periodically testing the system in a test mode, so as to determine the use status of the filter assembly (3) and whether replacement maintenance is required according to the detection results and/or the test results.