A smart drainage inspection well

Abstract

The present invention relates to a smart drainage inspection well, in which an independent equipment chamber is added to the inspection well shaft for placing and protecting monitoring equipment, and a separate openable well cover is provided on the inspection well shaft and the equipment chamber; an air suction pump and a multi-in-one hazardous gas detector are provided in the equipment chamber, and the air inlet of the air suction pump is connected to a vent pipe, which is extended into the inspection well chamber and the inspection well shaft through a flexible waterproof casing to extract gas from different parts of the inspection chamber, and the exhaust port of the air suction pump is connected to the multi-in-one hazardous gas detector, which detects the extracted gas. The inspection well of the present invention can protect the equipment from corrosion by toxic and harmful gases in the inspection well on the one hand, and facilitate the maintenance and overhaul of the detection equipment by the staff on the other hand.

Description

Technical Field

[0001] The present invention belongs to the technical field of urban drainage pipe network information monitoring, and relates to a smart drainage inspection well with intelligent sensing and early warning functions. Background Art

[0002] Urban drainage pipe networks are important municipal infrastructure for urban production and life, but there are often risks such as excessive concentrations of toxic and harmful gases, and pipe siltation and blockage. If the perception and early warning means are missing or not timely, various production safety accidents will occur, which will seriously threaten the normal operation of the urban drainage system and cause loss of life and property. In recent years, with the construction and development of smart water services in various places, higher requirements have been put forward for the monitoring and early warning of urban drainage pipe networks. In the past, the domestic monitoring of dangerous gas concentrations and liquid levels in drainage pipe networks mainly adopted manual sampling analysis or portable instruments, which not only required a lot of manpower and material resources, but also the measured data was far from meeting the application needs of comprehensive smart city management. It is urgent to empower drainage inspection wells through intelligent means. Summary of the invention

[0003] The purpose of the present invention is to provide a smart drainage inspection well, which can realize all-round and full-process monitoring of the concentration of dangerous gases and liquid level height information in the drainage network. This not only provides underlying data for the construction of urban smart water services, but also the smart drainage inspection well can judge the excessive concentration of dangerous gases and the blockage of the drainage network according to the monitoring data, and remind maintenance personnel to deal with the accident before it occurs, thereby effectively reducing the probability of accidents in urban drainage network.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a smart drainage inspection well, including an inspection chamber, the inspection chamber including an inspection chamber well chamber and an inspection chamber well shaft located above the inspection chamber well chamber, characterized in that an equipment chamber is also provided above the inspection chamber well chamber, the inspection chamber and the equipment chamber are separated by a concrete well wall, two flexible waterproof casings are pre-buried in the well wall, one of which connects the equipment chamber and the inspection chamber well chamber, and the other connects the equipment chamber and the inspection chamber well shaft, and a separate openable well cover is provided on the inspection chamber well shaft and the equipment chamber; an air suction pump and a multi-in-one hazardous gas detector are provided in the equipment chamber, the air inlet of the air suction pump is connected to a ventilation pipe, the ventilation pipe is extended into the inspection chamber well chamber and the inspection chamber well shaft through the flexible waterproof casing, to extract gas from different parts of the inspection chamber, the exhaust port of the air suction pump is connected to the multi-in-one hazardous gas detector, and the extracted gas is detected by the multi-in-one hazardous gas detector.

[0005] Furthermore, the gap between the flexible waterproof casing and the ventilation pipe is sealed with a corrosion-resistant elastic rubber material to prevent the dangerous gas in the routine inspection cavity from entering the equipment cavity and corroding the equipment.

[0006] Furthermore, the equipment cavity manhole cover is divided into a three-layer structure, which includes a tempered glass layer, a solar panel layer and a manhole cover base layer from top to bottom. A battery is provided in the equipment cavity to cooperate with the solar panel on the manhole cover to provide a long-term and continuous power supply for the equipment.

[0007] Furthermore, a flange reserved hole for installing an ultrasonic level meter probe is reserved at the top of the inspection chamber well chamber at the bottom of the equipment chamber for installing the ultrasonic level meter.

[0008] Furthermore, a main controller is installed in the equipment cavity. The main controller determines whether the dangerous gas concentration and liquid level height in the inspection well exceed the limit based on the detection results of the detection instrument. If the limit is exceeded, different pre-alarm signals will be sent to the remote server according to different set values; in addition, the main controller can also determine the working time of the next detection instrument based on the results of two adjacent detections, and control the detection instrument to work at the next working time of the detection instrument.

[0009] The control method of the main controller comprises the following steps:

[0010] S1, pre-set the first working time interval ΔT1 and the longest working time interval ΔT of the detection instrument in the inspection well max , the shortest working time interval ΔT min , the pre-alarm concentration of methane gas Alarm concentration Hydrogen sulfide gas warning concentration Alarm concentration Liquid level warning height W L 、Alarm height A h ;

[0011] S2, record the time T of two adjacent detection data m and T m-1 , the detection concentration of methane gas CH 4，m and CH 4，m-1 , the detection concentration of hydrogen sulfide gas H2S m and H2S m-1 , liquid level height L m and L m-1 ;

[0012] S3, judging whether the gas concentration of methane and hydrogen sulfide and the liquid level exceed the pre-alarm value, if it exceeds the pre-alarm value, proceed to S4, otherwise proceed to S5;

[0013] S4, if the pre-alarm value is exceeded but the alarm value is not exceeded, a pre-alarm alarm is sent to the remote server to alert the staff; if the alarm value is exceeded, the continuous detection state is entered;

[0014] S5, calculate the time interval between two measurements ΔT = T m -T m-1 , the methane gas concentration difference ΔCH4=CH 4,m -CH 4,m-1 , hydrogen sulfide gas concentration difference ΔH2S=H2S m -H2S m-1 , liquid level height difference ΔL=L m -L m-1 ;

[0015] S6, calculated And judge ΔT L Is there a value less than or equal to 0 in the equation? If so, let the value of the term less than 0 be ΔT max ;

[0016] S7, calculated And with the preset ΔT max , ΔT min For comparison, if ΔT min ≤ΔT≤ΔT max , then the next working time interval of the instrument is ΔT m+1 =ΔT; if ΔT ≥ ΔT max , then the next working time of the instrument is set at interval ΔT m+1 =ΔT max ; If ΔT≤ΔT min , then the next working time of the instrument is set at interval ΔT m+1 =ΔT min .

[0017] Furthermore, an NB-IoT wireless communication module is installed in the cavity of the inspection well equipment. This module can not only send the instrument detection results and system operation status directly to the remote server, but also transmit the instructions issued by the server to the main controller.

[0018] Furthermore, the smart drainage inspection well is characterized in that the main controller installed in the inspection well equipment cavity has a self-diagnosis function, which can perform regular inspections on detection instrument failures, low battery power, communication module damage, etc. When an abnormality occurs, it can automatically send the corresponding fault code to the remote server.

[0019] Advantages of the present invention: The present invention adds an equipment cavity to the shaft of a traditional drainage inspection well, places the detection equipment separately in the equipment cavity, and the equipment cavity is not directly connected to the drainage inspection well. The gas in the drainage inspection well is sucked into the equipment well for detection by using an air suction pump and a ventilation pipe. This protects the equipment from corrosion by toxic and harmful gases in the inspection well on the one hand, and facilitates the maintenance and inspection of the detection equipment by the staff on the other hand; in addition, the main controller in the inspection well has the function of adaptively adjusting the detection time, which is used to flexibly adjust the interval between two adjacent detection times, thereby reducing the overall energy consumption of the equipment and extending the service life of the instrument detection equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the cross-section of the smart drainage inspection well structure;

[0021] Figure 2 This is a top view of the smart drainage inspection well;

[0022] Figure 3 It is a schematic diagram of the equipment layout of the equipment cavity;

[0023] Figure 4 This is the installation diagram of the ultrasonic level meter;

[0024] Figure 5 Control flow chart for main controller;

[0025] The figure includes, 1. inspection chamber, 2. equipment chamber, 3. inspection chamber manhole cover, 4. equipment chamber manhole cover, 5. solar panel, 6. battery, 7. ventilation pipe, 8. suction pump, 9. main controller, 10. flexible waterproof casing, 11. equipment chamber manhole cover vent, 12. tempered glass, 13. ultrasonic level meter, 14. all-in-one gas detector, 15. wireless communication module, 16. corrosion-resistant elastic rubber material, 17. flange reserved hole. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] like Figure 1As shown, a smart drainage inspection well is mainly composed of an inspection chamber 1 and an equipment chamber 2. The inspection chamber 1 is a traditional inspection well body, including an inspection chamber chamber and an inspection chamber shaft located above the inspection chamber chamber. The equipment chamber refers to a closed space adjacent to the inspection chamber shaft and located above the inspection well chamber. A battery 6, an air pump 8, a main controller 9, an ultrasonic level meter 13, an all-in-one gas detector 14, and an NB-IoT wireless communication module 15 are placed in the equipment chamber. The equipment chamber 2 in the inspection well is not directly connected to the inspection chamber 1, and the dangerous gas in the drainage network cannot enter the equipment chamber 2 through natural dissipation. Separate openable manhole covers are provided on the inspection chamber 1 and the equipment chamber 2, and the staff can inspect and maintain the faults of different chambers separately.

[0028] In the present invention, the inspection chamber well room is connected to the inspection chamber shaft, and the shaft is above the well room. Because there are many kinds of hazardous gases in the sewage network, and the specific gravity of different hazardous gases to air is not exactly the same, only detecting the gas concentration data at a single height may cause large errors in the detection data. Therefore, the gas concentration data of both the inspection chamber well room and the inspection chamber shaft are sampled in the present invention.

[0029] The main controller of the present invention adopts the SNG1600F controller, which can realize the main functions such as low-power continuous operation, data transmission and reception, GPS positioning, and clock control.

[0030] The NB-IoT wireless communication module uses the Wisefone7100 chip, which has the advantages of wide coverage, low power consumption, large connection and low cost, and acts as a bridge between local and remote control of the inspection well.

[0031] In addition, the inspection cavity and the equipment cavity are separated by a concrete well wall, in which two flexible waterproof casings 10 are embedded. The ventilation pipe 7 of the suction pump extends into the inspection cavity through the waterproof casing, and the gap between the waterproof casing and the ventilation pipe is sealed with a fluororubber O-ring.

[0032] like Figure 2 As shown, the inspection chamber 1 and the equipment chamber 2 are respectively equipped with independent inspection manhole covers. To facilitate the circulation of air in the equipment chamber 2, two exhaust holes 11 are provided on the manhole cover of the equipment chamber 2, and a cavity for placing the solar panel 5 is provided between the two exhaust holes 11. The top of the cavity is protected by tempered glass 2. The solar panel 5 can be used to charge the battery 6 at ordinary times to ensure that the detection equipment can operate stably for a long time.

[0033] like Figure 3As shown, the air inlet of the suction pump and the ventilation pipe 7, and the exhaust port of the suction pump and the air inlet of the multi-in-one gas detector 14 are connected by a hose. When the inspection well needs to detect the information inside the well, the suction pump will start to operate and suck the gas in the inspection cavity into the multi-in-one gas detector 14 for detection. After the detection is completed, the detector will transmit the detection results to the main controller 9, which will determine whether it is necessary to issue an alarm signal and calculate the next working time, and transmit the data to the remote server for storage through the NB-IoT wireless communication module 15, and the inhaled gas will naturally dissipate into the atmosphere along the exhaust hole 11 of the equipment cavity cover, completing a detection cycle.

[0034] like Figure 4 As shown, a flange reserved hole 17 for installing the ultrasonic level meter probe is reserved at the bottom of the equipment cavity at the top of the inspection cavity concrete. The ultrasonic level meter 13 is installed in the equipment cavity through the flange and detects the liquid level in the inspection cavity through the reserved hole. The liquid level detection data is transmitted to the main controller 9 together with the above-mentioned gas detection data for judgment, and then the NB-IoT wireless communication module transmits it to the remote server for storage.

[0035] The main process of the control method of the main controller in the inspection well is as follows: Figure 5 shown.

[0036] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited thereto. Any modification, equivalent replacement or improvement made within the technology and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A smart drainage inspection well, comprising an inspection cavity, wherein the inspection cavity comprises an inspection cavity chamber and an inspection cavity shaft located above the inspection cavity chamber, characterized in that An equipment cavity is also provided above the inspection chamber well room. The inspection chamber and the equipment cavity are separated by a concrete well wall. Two flexible waterproof casings are pre-buried in the well wall, one of which connects the equipment cavity and the inspection chamber well room, and the other connects the equipment cavity and the inspection chamber shaft. Separate openable well covers are provided on the inspection chamber shaft and the equipment cavity respectively. An air suction pump and a multi-in-one hazardous gas detector are provided in the equipment cavity. The air inlet of the air suction pump is connected to a vent pipe, which passes through the flexible waterproof casing and extends into the inspection chamber well room and the inspection chamber shaft to extract gas from different parts of the inspection cavity. The exhaust port of the air suction pump is connected to the multi-in-one hazardous gas detector, and the multi-in-one hazardous gas detector detects the extracted gas. A main controller is also installed in the equipment cavity. The main controller determines whether the concentration of dangerous gas and the liquid level in the inspection well exceed the limit according to the detection results of the detection instrument. If the limit is exceeded, different pre-alarm signals will be sent to the remote server according to different set values; The main controller also determines the working time of the next detection instrument according to the detection results of two adjacent times, and controls the detection instrument to work at the working time of the next detection instrument, which specifically includes the following steps: S1, pre-set the first working time interval △T1 of the detection instrument in the inspection well, and the longest working time interval △T max , the shortest working time interval △T min , the pre-alarm concentration of methane gas Alarm concentration Hydrogen sulfide gas warning concentration Alarm concentration Liquid level warning height W L 、Alarm height A h ; S2, record the time T of two adjacent detection data m and T m-1 , detection concentration of methane gas CH4, m and CH4, m-1 , the detection concentration of hydrogen sulfide gas H2S m and H2S m-1 , liquid level height L m and L m-1 ; S3, judging whether the gas concentration of methane and hydrogen sulfide and the liquid level exceed the pre-alarm value, if it exceeds the pre-alarm value, proceed to S4, otherwise proceed to S5; S4, if the pre-alarm value is exceeded but the alarm value is not exceeded, a pre-alarm alarm is sent to the remote server to alert the staff; if the alarm value is exceeded, the continuous detection state is entered; S5, calculate the time interval between two measurements △T = T m -T m-1 , the methane gas concentration difference △CH4=CH 4,m -CH 4,m-1 , hydrogen sulfide gas concentration difference △H2S=H2S m -H2S m-1 , liquid level height difference △L=L m -L m-1 ; S6, calculated And judge Is there a value less than or equal to 0 in the equation? If so, let the value of the term less than 0 be △T max ; S7, calculated And with the preset △T max , △T min For comparison, if △T min ≤△T≤△T max , then the next working time interval of the instrument is △T m+1 =△T; if △T≥△T max , then the next working time of the instrument is set according to the interval △T m+1 =△T max ; If △T≤△T min , then the next working time of the instrument is set according to the interval △T m+1 =△T min .

2. The intelligent drainage inspection well as claimed in claim 1, characterized in that The gap between the flexible waterproof casing and the ventilation pipe is sealed with corrosion-resistant elastic rubber material to prevent the dangerous gas in the routine inspection cavity from entering the equipment cavity and corroding the equipment.

3. The intelligent drainage inspection well according to claim 1, characterized in that The equipment cavity manhole cover is divided into three layers, from top to bottom, tempered glass layer, solar panel layer and manhole cover base layer. The battery in the equipment cavity cooperates with the solar panel on the manhole cover to provide long-term and continuous power supply for the equipment.

4. The intelligent drainage inspection well according to claim 1, characterized in that The top of the inspection chamber well is located at the bottom of the equipment chamber and has a flange reserved for installing an ultrasonic level meter probe, which is used to install the ultrasonic level meter.

5. The intelligent drainage inspection well as claimed in claim 1, characterized in that An NB-IoT wireless communication module is installed in the cavity of the inspection well equipment. This module can not only send the instrument detection results and system operation status directly to the remote server, but also transmit the instructions issued by the server to the main controller.

6. The intelligent drainage inspection well according to claim 1, characterized in that The main controller has a self-diagnosis function and can perform regular inspections on instrument failures, low battery levels, and communication module damage. When an abnormality occurs, it can automatically send the corresponding fault code to the remote server.

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