KR101864391B1 - Automatic monitoring system of sewer pipe - Google Patents

Abstract

The present invention relates to an automatic monitoring system for a sewer pipe, and more particularly, to a sewer pipe monitoring system that automatically monitors real-time situation information of a sewer pipe from a plurality of measurement sensors provided on a sewer pipe, The present invention relates to an automatic monitoring system of a sewer pipe for protecting a sewer pipe.

Description

[0001] Automatic monitoring system of sewer pipe [0002]

The present invention relates to an automatic sewage monitoring system, and more particularly, to a sewage monitoring system that automatically monitors real-time situation information of a sewer pipe from a plurality of measurement sensors provided on a sewer pipe, The present invention relates to an automatic monitoring system of a sewer pipe for protecting a sewer pipe.

Generally, in operation of sewage treatment plants, the actual influent water quality and water quality are important factors that determine the efficiency of the entire treatment process. Further, since sewage that has not been collected by the sewer pipe is inevitably flowed into discharged water or ground water, The inadequacy of the facility adversely affects the overall water quality.

In this regard, the sewer pipe in the area is buried underground, so once it is constructed, it will be difficult to inspect the conduit condition or verify its function.

In addition, it is necessary to plan and maintain sewage pipe maintenance plan based on accurate understanding of the degree of insolvency of sewer pipe, but conventional inspection and evaluation methods have a very inefficient problem in terms of time and economic difficulty and accuracy.

In addition, much time and expenses are invested in determining the occurrence and degree of defects after construction, and the existing survey methods such as visual inspection, CCTV survey, dye tracking survey, This complexity and lack of objectivity make it difficult to obtain quantified measurement results and evaluation data.

A sewage pipe monitoring system is disclosed in the Korean Patent Registration No. 10-1187998 (Oct.

However, such a conventional sewer monitoring system has a problem in that the gas sensor can not be protected from sewage or the like falling from a sewer pipe to a manhole.

Korean Patent Registration No. 10-1187998 (Oct. 8, 2012) describes the 'sewer monitoring system'

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to automatically monitor real-time situation information of a sewer pipe from a plurality of measurement sensors provided on a sewer pipe, And to provide an automatic monitoring system for a sewer pipe to protect the gas sensor from the sewer pipe.

The problems to be solved by the present invention are not limited to those mentioned above, and other solutions not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the present invention provides a system for collecting and collecting status information of a plurality of sewer pipes installed in a specific management area, monitoring the same, collecting various measurement data installed in the sewer pipe, (200) for inputting local information including a population and an area of the area to be managed and history information about a plurality of sewer pipes installed in the area, and the input unit (200) An operation server 20 for receiving measurement data in real time and analyzing and storing status information of the sewer pipe; And an administrator terminal (30) for requesting status information of the sewer pipe in association with the operation server (20) and receiving status information data stored in the operation server and monitoring the status information data. The collecting unit (10) And a gas sensor (100) installed on the manhole (1) where one or more sewer pipes (2) are focussed to measure the concentration of hydrogen sulfide gas generated from the sewer pipe (2) The collector (10) analyzes the measured data from the sensor (100) to diagnose and evaluate the sewer pipe, and grasps the deterioration of the sewer pipe based on the data. The collecting unit (10) Wherein the mounting means comprises a guide rail (160) coupled along a side wall of the manhole (1), and a guide rail (160) coupled to a lower portion of the gas sensor (100)A system for automatically monitoring a sewer pipe including a buoyant valve (150) installed to flow along a guide rail (160), the system comprising: a protection unit (400) for protecting the gas sensor (100) (400) comprises a protection plate (410) for protecting the gas sensor (100) from the sewage which is located on the upper side of the gas sensor (100) and falls down from the upper side; A support plate 420 formed with a hollow 421 penetrating in the up and down direction and seated on the buoyancy member 150 to pass the gas sensor 100 inward; A plurality of support bars 430 supporting the shroud 410 from the support plate 420 and having threads formed on an outer circumferential surface thereof; And upper and lower binding members 440 and 450 that are screwed to the outside of the supporting bar 430 and are coupled to the supporting bar 430 so as to be positioned above and below the protecting plate 410 And the distance between the protection plate 410 and the gas sensor 100 is adjusted as the protection plate 410 is lifted and lowered according to the rotation of the upper and lower binding members 440 and 450. [ Monitoring system.

According to the present invention, firstly, a sensor capable of measuring the concentration of hydrogen sulfide occurring on the sewer pipe can be provided, and it is possible to grasp the deterioration of the objective sewer pipe based on the measurement data collected through the sensor, , Water level, flow rate and water quality data are collected and collected. Through these measurement data, it is possible to calculate the combined sewer overflow (CSO), infiltration and infiltration quantity (I / I: Infiltration / Inflow) The information can be analyzed and monitored.

Second, it can be used as a basic data for quantification of old and poor sewage pipes through the above-mentioned analysis data. Therefore, it is a tool of decision support for the maintenance plan and implementation plan of sewage pipe and sewage treatment plant It is possible to utilize the sewer system quickly and accurately, and it is possible to achieve high efficiency in terms of time and economy, and it is very effective in prevention of excessive design and operation management of sewage terminal treatment facilities by reasonably calculating the amount of generated water and the amount of pollution load. .

Thirdly, since the protection unit is provided, it is possible to protect the gas sensor from sewage or the like falling from the sewer pipe to the manhole.

The effects of the present invention are not limited to those mentioned above, and other solutions not mentioned may be clearly understood by those skilled in the art from the following description.

1 is a schematic view schematically showing an automatic monitoring system of a sewer pipe according to the present invention.
2 is a schematic view showing a collecting part in an automatic monitoring system of a sewer pipe according to the present invention;
3 is a perspective view showing a gas sensor in an automatic monitoring system for a sewer pipe according to the present invention.
4 is a perspective view showing a state where a gas sensor is installed on a guide rail in an automatic monitoring system for a sewer pipe according to the present invention.
5 is a graph showing a proportional relationship between dirt accumulation amount and hydrogen sulfide in a sewer pipe automatic monitoring system according to the present invention.
6 is a schematic diagram showing an operational server in an automatic monitoring system for sewer pipes according to the present invention.
And
FIG. 7 is a cross-sectional view illustrating a state in which a protector is provided in a buoyancy port in an automatic monitoring system of a sewer pipe according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. And should not be construed as limited to the embodiments described herein.

Since the embodiments according to the concept of the present invention can make various changes and have various forms, specific embodiments are illustrated in the drawings and described in detail herein.

It should be understood that the embodiments according to the concept of the present invention are not limited to the particular mode of disclosure but include all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.

Since the present invention uses the previously-described prior-art patent No. 1187998 as it is, all the features of the device configuration described below can be understood as the matters described in the registered patent No. 1187998. [

However, the present invention further includes a structure for protecting the gas sensor out of the configurations disclosed in the above-mentioned Japanese Patent No. 1187998 and a description of the operation thereof, and this part is the most essential constitutional feature.

Therefore, the device structure, characteristics, and operation relationship described below will be referred to as the contents of the above-mentioned U.S. Patent No. 1,187,998, and the configuration related to the main features of the present invention will be described in detail at the rear end.

1 to 6, an automatic sewer pipe monitoring system according to the present invention collects status information on a plurality of sewer pipes installed in a specific management area and automatically monitors the status information. The sewer pipe is installed in a sewer pipe, A collection unit 10 for collecting measurement data, input means 200 for inputting local information including the population and area of the area to be managed, and history information about a plurality of sewer pipes installed in the area, An operation server 20 for receiving measurement data collected through the wired / wireless communication network from the collecting unit 10 in real time, analyzing and storing status information of the sewer pipe, and storing and outputting the status information of the sewer pipe, Information for requesting information and receiving status information data stored in the operation server 20, It is configured to include a 30.

The collection unit 10 measures and collects measurement data for a plurality of sewer pipes installed in a management area and transmits the measured data to the operation server 20 through a wired / wireless communication network. In the sewer pipe, a Ubiquitous Sensor Network ) Technology to enable one or more metrology data measured from a variety of metrology instruments to be collected.

The measuring unit of the collecting unit 10 includes various measurement sensors 110 for measuring and collecting the pressure of the sewer pipe and the flow rate, water level, flow rate and water quality data for the sewage, a rainfall sensor 120 for measuring the rainfall amount, The collecting unit 10 includes an information collecting unit 130 for collecting the data collected from the various measurement sensors 110 and the rainfall amount sensor 120 and the information collecting unit 130 And the communication module 140 for transmitting the collected data to the operation server 20 so that the information data of the information collector 130 is transmitted to the operation server 20 in real time.

As an example of the communication module 140 for communicating with the operation server 20, a conventional modem for performing TCP / IP communication using the vDSL network may be applied. To the operation server (20).

The various sensors for measuring the pressure, the flow rate, the water level, the flow rate, and the water quality data can be variously applied through known technologies, and a detailed description thereof will be omitted.

According to an embodiment of the present invention, the collecting unit 10 further includes a gas sensor 100 installed on a manhole 1 on which one or more sewer pipes 2 are focussed, as shown in FIG. 3 can do.

The gas sensor 100 is for measuring the concentration of hydrogen sulfide gas generated from the sewage pipe 2. The measurement data is transmitted to the operation server 20 to be described below and the hydrogen sulfide concentration measured from the operation server 20 It is possible to grasp the aging of the pipeline through.

This is because the hydrogen sulfide (H2S) is generated by the reduction of the conversion salt in the biofilm formed in the sewer pipe, and the hydrogen sulfide is oxidized by the microorganism and oxidized to sulfuric acid to cause the corrosion of the conduit. By estimating the degree of corrosion, the condition of the conduit is diagnosed and evaluated.

At this time, it is preferable that the gas sensor 100 is installed as close as possible to a position where hydrogen sulfide gas is generated, thereby minimizing dilution due to other atmospheres.

For example, as shown in FIG. 3, the collecting part 10 may further include mounting means so that the gas sensor 100 can be configured to ascend and descend fluidly according to the water level of the manhole 1.

The mounting means includes at least one guide rail 160 coupled along the side wall of the manhole 1 and a buoyancy spring 150 coupled to a lower portion of the gas sensor 100 and adapted to flow along the guide rail 160. [ ).

4, the guide rail 160 may be formed in a pipe shape. The buoyancy hole 150 may be formed on one side surface of the flow pipe (not shown) to surround the outer circumferential surface of the pipe guide rail 160a 161 may be provided.

The flow pipe 161 can be raised or lowered along the pipe guide rail 160 and the buoyant valve 150 and the gas sensor 100 combined with the flow pipe 161 It will work together.

The stopper 190 is disposed at a lower portion of the guide rail. The stopper 190 is configured to be able to adjust the position of the stopper 190 so that the stopper 190 can flow at a lower portion of the guide rail 160. The downward flow of the sensor 100 is restricted so that the gas sensor 100 is protected from the sewage contained in the manhole 1 and at the same time the gas sensor 100 is positioned at the upper portion of the invert so that the rain does not occur, Do not disturb the milking.

The operating server 20 includes an input unit 200 and a communication unit. The input unit 200 includes not only the population and area of the area to be managed, but also a housing type, a sewage drainage system, History information such as location information, construction information, dredging information, and specification information of the sewer pipe, which is history information about a plurality of sewer pipes installed in the area, as well as local information. Such input information is used as basic information in the analysis process of the operation server 20 described below.

The communication means receives information data transmitted from the communication module 140 of the collecting unit 10 by using a conventional wired or wireless communication network.

Meanwhile, the operation server 20 receives the information data transmitted from the collecting unit 10 and the data input through the input unit 200 in real time, analyzes the state information of various sewer pipes, and stores and outputs the information And obtains the information requested from the administrator terminal 30 described below and provides the information corresponding to the request information to the administrator terminal 30.

Specifically, the operating server 20 6, the sewage pipe evaluation unit 210, the water quantity analysis unit 220, the sewage pipe leakage analysis unit 230, the pollution load unit intensity analysis unit 240, and the sewage pipe failure analysis unit 250 .

The sewage pipe evaluation unit 210 analyzes the sulfur gas measurement data transmitted from the gas sensor 100 described above, diagnoses and evaluates the sewer pipe, and grasps the objective deterioration of the sewer pipe based on the diagnosis.

At this time, in diagnosing and evaluating the sewer pipe, the evaluation information of the sewer pipe according to the specification of the corresponding sewer pipe, that is, the diameter or material of the pipe, among the history information of the sewer pipe inputted from the input means 200 of the operation server 20, It is natural that it can be different.

In addition, the sewage pipe evaluation unit 210 analyzes data measured from the gas sensor 100 and predicts the amount of dirt accumulated in the sewer pipe. That is, as shown in FIG. 6, as the hydrogen sulfide rises in proportion to the amount of dirt accumulation in the conduit, the sewage pipe evaluation unit 210 determines the corrosion progress state of the pipe through the hydrogen sulfide gas concentration measured by the gas sensor 100 Of course, when the hydrogen sulfide gas concentration reaches a certain level, the amount of dirt accumulation in the pipeline is predicted and the dredging time is determined accordingly.

As described above, the sewage pipe evaluation unit 210 can determine the overall deterioration and maintenance period of the pipeline by determining the dredging time according to the corrosion state of the pipeline and the amount of dirt accumulation through the input hydrogen sulfide gas concentration.

The quantity analyzer 220 analyzes Combined Sewer Overflows (CSO), infiltration quantity and infiltration quantity (Infiltration / Inflow) on the basis of data transmitted from the collecting unit 10.

As the method of analyzing invasive water, four estimation methods can be applied, such as a method for estimating the amount of water used, a maximum / minimum flow rate evaluation method / day maximum flow rate evaluation method, and a night life wastewater assessment method.

The above water use evaluation method evaluates the average value of the measured flow rate as the invasive water quantity obtained by subtracting the sewage water discharge amount estimated from the constant usage amount.

That is, the amount of infiltration = the measured amount of sewage - (the amount of water used × the conversion rate of wastewater), and the wastewater conversion rate is usually 0.8 to 0.9.

The daily maximum / minimum flow rate is calculated by subtracting the amount of nightly industrial wastewater from the daily minimum wastewater calculated from the average value of the measured flow rate. The inflow rate is the minimum wastewater amount per day - the amount of factory wastewater (based on 24-hour operation).

The daily maximum flow rate is calculated by subtracting the minimum value of the daily minimum sewage from the maximum value of the daily minimum water flow calculated from the measured flow rate. Finally, the night life wastewater assessment method evaluates the amount of inflow by subtracting the amount of night living sewage and the amount of factory wastewater from the daily minimum water amount of the measured flow rate.

In the present invention, the average of the remainder obtained by subtracting the maximum and minimum of the inflow water calculated by the four estimation methods is considered as the infiltration water and is analyzed comprehensively.

When the inflow water is analyzed, it is calculated by the flow rate during rainfall and the average flow rate during the dry season, and the flow rate during rainfall is subtracted from the dry season average flow rate to select the total inflow amount.

On the other hand, the sewage leak analysis unit 230 of the operation server 20 analyzes the leakage of the pipe based on the measurement data transmitted from the collection unit 10.

In addition, the pollution load unit intensity analyzer 240 analyzes the sewage generation amount and the pollutant load based on the data transmitted from the collecting unit 10 and the input unit 200.

The sewage pipe failure analysis unit 250 analyzes the combined amount of sewerage overflows (CSO) analyzed through the water analysis unit 220, the sewage leak analysis unit 230 and the pollution load unit analysis unit 240 Determine the difficulty of the pipelines through infiltration quantity and infiltration quantity (I / I: infiltration / inflow), the exfiltration of the pipelines and the information of the unit level, and determine the time of renovation and determine the priority.

In addition, the operating server 20 is configured to perform a conditional search. To this end, the operating server 20 further includes a database 280 in which received measurement data and self-analyzed result data are stored (Flow rate, flow rate, water level), data of the correlation between items (flow rate, flow rate, water level), water quality data And the analysis of rainfall events.

In addition, the operation server 20 further includes an abnormal state detection unit 270. The abnormal state detection unit 270 detects the abnormal state of the various measuring instruments constituting the collecting unit 10, And provides the contents of the meter and its failure state to the administrator terminal 30 and the manager when the abnormal state is detected.

The abnormal state detection information is transmitted to the manager through an information transmission medium such as SMS, E-mail, or Fax.

The operation server 20 further includes an information providing unit 250 for extracting information requested from the administrator terminal 30 described below from the database 280 and transmitting the request information to the administrator terminal 30, ).

Meanwhile, the administrator terminal 30 is configured to provide various information necessary for monitoring the sewer pipe to the manager. The manager terminal 30 is connected to the operation server 20 and displays result information analyzed and processed in the operation server 20 in real time .

The administrator terminal 30 includes the information requesting unit 300 and requests the operation server 20 for specific status information, cumulative information, past history information, and conditional search information for the sewer pipe, and receives the request .

In particular, the administrator terminal 30 includes a GIS-based sewage pipe map providing unit 310. In the operation server 20, the connection status of the sewer pipes provided on the area to be managed and the direction of the sewage It is possible to monitor through the sewerage map of the corresponding region by grasping the state of convergence of the step by step and providing it to the manager terminal 30. [

In the present invention, the configuration of the protection unit 400 for protecting the gas sensor 100 is further implemented, as shown in FIG. 7, including the configuration described above.

The protection unit 400 protects the gas sensor 100 from sewage or the like falling from the sewer pipe 2 to the manhole 1 so that the sensing state of the gas sensor 100 can be continuously maintained. do.

That is, when the gas sensor 100 is positioned below the sewer pipe 2, the protection unit 400 generates sewage or the like discharged from the sewer pipe 2 while falling into the gas sensor 100 The gas sensor 100 can be prevented from being damaged or broken and the sensing state of the gas sensor 100 can be continuously maintained.

The protection unit 400 includes a protection plate 410 which is located on the upper side of the gas sensor 100 and protects the gas sensor 100 from the sewage which is dropped from the upper part of the protection unit 400, A support plate 420 that is mounted on the upper portion of the buoyancy member 150 so as to allow the gas sensor 100 to pass therethrough and a plurality of protrusions 420 that support the protection plate 410 from the support plate 420, The upper and lower binding members 430 and 430 are screwed to the outside of the support bar 430 so as to be positioned on the upper and lower sides of the support bar 430 and the protection plate 410, (440, 450).

The protection plate 410 may have a rectangular shape and may be formed with a curved surface portion 411 protruding upward in the central portion and having a hemispherical shape.

This is so that the pressurization by the sewage or the like falling from the sewer pipe 2 can be dispersed.

The curved surface portion 411 may be provided with a transparent visible window 412 for visually checking the state of the gas sensor 100.

It is preferable that the protection plate 410 has an outer circumference extending outwardly from the buoyancy member 150 to prevent the sewage falling from the sewer pipe 2 from approaching the gas sensor 100.

The support plate 420 has the same shape as the upper periphery of the buoyancy member 150 and is formed at the upper part of the buoyancy member 150 so that the gas sensor 100 passes through the hollow 421 at the center. Lt; / RTI >

The support bars 430 are coupled to the support plate 420 by welding or the like so that the support bars 430 are positioned at both sides of the gas sensor 100 and the upper portion of the support bars 430 passes through the protection plate 410.

The protection plate 410 is coupled to the support bar 430 in such a manner that it can be raised and lowered while a through hole 413 through which the upper portion of the support bar 430 passes is formed on both sides.

The upper and lower binding members 440 and 450 may be formed of a nut having a thread on the inner circumferential surface thereof and may be screwed to the support bar 430 so as to be positioned above and below the protection plate 410, And is coupled to the support bar 420.

That is, the upper and lower binding members 440 and 450 are coupled to the support bar 430 in a direction opposite to the direction in which the support bar 430 is screwed, that is, when the protection plate 410 is moved up and down .

In other words, the upper and lower binding members 440 and 450 are rotated in a direction opposite to the protecting plate 410 while the upper and lower binding members 440 and 450 are screwed to the supporting bar 430, So that it can be moved in the vertical direction.

The distance between the protection plate 410 and the gas sensor 100 can be adjusted as the protection plate 410 is lifted or lowered according to the rotation of the upper and lower binding members 440 and 450.

Accordingly, the position at which the gas sensor 100 can be stably protected from the sewage or the like dropped by the sewer pipe 2 can be adjusted appropriately.

The protection unit 400 may further include a buffering means 460 for buffering an impact caused by sewage or the like falling from the upper portion.

The buffering means 460 may include a ring-shaped buffer plate 461 coupled to the outside of the support bar 430 to be positioned above the lower binding member 450 and a ring-shaped buffer plate 461 between the protection plate 410 and the buffer plate 461. And a spring 462 coupled to the outside of the support bar 430 so as to be positioned on the support bar 430.

The spring 462 contracts and relaxes the shock due to the pressure of the protection plate 410 by the sewage or the like falling on the protection plate 410.

Accordingly, the shock absorber 460 can prevent the gas sensor 100 from being damaged as well as deformation of the protection plate 410 by buffering an impact caused by an external force.

The elastic force of the spring 462 can be adjusted while contracting or relaxing as the lower binding member 450 is lifted or lowered.

In addition, the spring 462 can be adjusted in elasticity while contracting or loosening as the upper binding member 440 is lifted or lowered.

Here, when the protective plate 410 is spaced apart from the gas sensor 100 by an appropriate height, the elastic force of the spring 462 is preferably adjusted by raising and lowering the lower binding member 450.

Therefore, the protection unit 400 can stably protect the gas sensor 100 from sewage or the like falling from the sewer pipe 2 to the manhole 1. [

10: collecting unit 20: operating server
30: Manager terminal 100: Gas sensor
110: measurement sensor 120: rainfall sensor
140: information collecting device 150: communication module
200: input means 210: sewage pipe evaluation section
220: quantity analysis section 230: sewage leak analysis section
240: Pollution load unit analysis unit 250: Sewer pipe failure analysis unit
260: information providing unit 270: abnormal state detecting unit
280: database 300: information requesting unit
310: Sewerage map providing unit 400: Protection unit
410: Shield plate 420: Support plate
430: Support bar 440: Upper coupling member
450: Lower binding member

Claims (1)

Collects and monitors status information for multiple sewer pipes installed in a specific controlled area,
A collection unit (10) installed in the sewer pipe and collecting various kinds of measurement data;
(200) for inputting local information including a population and an area of the area to be managed and history information about a plurality of sewer pipes installed in the area, and the input unit (200) An operation server 20 for receiving measurement data in real time and analyzing and storing status information of the sewer pipe; And
And an administrator terminal (30) for requesting status information of the sewer pipe in association with the operation server (20) and receiving status information data stored in the operation server and monitoring the status information data,
The collecting unit (10)
And a gas sensor (100) installed on the manhole (1) where one or more sewer pipes (2) are focussed to measure the concentration of hydrogen sulfide gas generated from the sewer pipe (2)
The operating server (20)
Analyzes the data measured from the gas sensor 100, diagnoses and evaluates the sewer, analyzes the deterioration of the sewer,
The collecting unit (10)
And mounting means configured to move up and down the gas sensor (100) according to the level of the manhole (1)
Wherein,
A guide rail 160 coupled along the side wall of the manhole 1 and a buoyant valve 150 coupled to a lower portion of the gas sensor 100 and configured to flow along the guide rail 160 In an automatic monitoring system,
And a protection unit 400 for protecting the gas sensor 100 from the sewage falling from the sewer pipe 2 to the manhole 1 so that the sensing state of the gas sensor 100 is continuously maintained However,
The protection unit 400 includes:
A protection plate 410 disposed on the upper side of the gas sensor 100 to protect the gas sensor 100 from sewage falling from the upper portion thereof;
A support plate 420 formed with a hollow 421 penetrating in the up and down direction and seated on the buoyancy member 150 to pass the gas sensor 100 inward;
A plurality of support bars 430 supporting the shroud 410 from the support plate 420 and having threads formed on an outer circumferential surface thereof;
Upper and lower binding members 440 and 450 that are screwed to the outside of the support bar 430 to bind the protection plate 410 to the support bar 430 so as to be positioned on the upper and lower sides of the protection plate 410; And
And a shock absorber (460) for absorbing the shock caused by the sewage falling from the upper portion to prevent the gas sensor (100) from being damaged together with the deformation of the protection plate (410)
The protection plate 410 may be formed of,
A curved surface portion 411 protruding upward in a central portion and having a hemispherical shape is formed so that pressurization by the sewage falling from the sewage pipe 2 can be dispersed,
In the curved surface portion 411,
A transparent visible window 412 for visually checking the state of the gas sensor 100 is provided,
The buffering means (460)
A ring-shaped buffer plate 461 coupled to the outside of the support bar 430 to be positioned above the lower binding member 450; And
And a spring 462 coupled to the outside of the support bar 430 to be positioned between the protection plate 410 and the buffer plate 461,
The protection plate 410 may be formed of,
The gas sensor 100 is lifted and lowered according to the rotation of the upper and lower binding members 440 and 450 while adjusting the distance to the gas sensor 100 from the sewage falling from the sewer pipe 2, And the position where it can be stably protected is adjusted,
The spring (462)
The upper and lower binding members 440 and 450 are contracted and relaxed in accordance with the upward and downward movements of the upper and lower binding members 440 and 450. The elastic force Wherein the elastic force is controlled by the lifting and lowering of the lower binding member 450 when the protection plate 410 is spaced apart from the gas sensor 100 by an appropriate height.

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