A greenhouse gas monitoring device for gas pipelines

Abstract

This utility model relates to a greenhouse gas monitoring device for gas pipelines, comprising a water vapor separator, an air pump, a dual-module sensor for detecting methane and nitrous oxide, a carbon dioxide sensor, a main control circuit module, and a power supply module. The inlet of the water vapor separator is connected to the gas pipeline, and the outlet of the water vapor separator is connected to the inlet of the air pump via a first pipe. The outlet of the air pump is connected to the inlet of the dual-module sensor via a second pipe, and the outlet of the dual-module sensor is connected to one interface of the carbon dioxide sensor via a third pipe. The other interface of the carbon dioxide sensor is connected to an exhaust pipe open to the atmosphere. The dual-module sensor, carbon dioxide sensor, air pump, and power supply module are all electrically connected to the main control circuit module. The advantages of this utility model are: simple design, small size, portability, and the ability to simultaneously detect three greenhouse gases: carbon dioxide, methane, and nitrous oxide.

Description

Technical Field

[0001] The utility model relates to the field of pipeline gas monitoring, in particular to a greenhouse gas monitoring device for a gas pipeline. Background Art

[0002] Existing mobile public toilets are usually installed in places with large pedestrian flows such as parks and streets to provide convenience for pedestrians such as tourists. The gas in the septic tank配套 with the mobile public toilet contains gases that have a certain impact on the environment and the atmosphere, such as carbon dioxide, methane, and nitrous oxide, and these gases are all greenhouse gases that can cause the greenhouse effect. In response to the country's low-carbon policy and to control greenhouse gas emissions, it is necessary to monitor the concentration of these gases. When the concentration of these gases exceeds the standard, an alarm must be issued to remind the relevant management departments to take measures and not directly discharge. However, most of the existing gas monitoring devices are directly installed in the gas circulation pipeline. Such a circulation pipeline generally has power devices such as a blower or a suction fan, and the gas in the pipeline already has strong unidirectional fluidity, and all the gas flows through the gas monitoring device driven by its own fluidity. The gas discharge pipe of the septic tank of the mobile public toilet is released based on the air pressure difference inside and outside the tank. Therefore, the existing directly installed gas monitoring devices cannot meet the gas monitoring requirements of the mobile public toilet. At the same time, the existing gas monitoring devices also have the following deficiencies: 1. They are large in size and complex in internal structure; 2. They do not have the function of simultaneously monitoring the above three gases. Summary of the Invention

[0003] In order to solve the above problems, the purpose of the utility model is to provide a greenhouse gas monitoring device for a gas pipeline, which has few components, is compact in structure, small in size, portable, and can simultaneously detect the three greenhouse gases of carbon dioxide, methane, and nitrous oxide.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A greenhouse gas monitoring device for a gas pipeline includes a water vapor separation filter, an air pump, a dual-module sensor for detecting methane and nitrous oxide, a carbon dioxide sensor, a main control circuit module, and a power supply module. The air inlet of the water vapor separation filter is connected to the gas pipeline, the air outlet of the water vapor separation filter is connected to the air inlet of the air pump through a first pipeline, the air outlet of the air pump is connected to the air inlet of the dual-module sensor through a second pipeline, the air outlet of the dual-module sensor is connected to one interface of the carbon dioxide sensor through a third pipeline, the other interface of the carbon dioxide sensor is connected to an exhaust pipeline, and the exhaust pipeline communicates with the atmosphere; the dual-module sensor, the carbon dioxide sensor, the air pump, and the power supply module are all electrically connected to the main control circuit module.

[0006] More preferably, the monitoring device further includes a housing, in which the air pump, dual-module sensor, carbon dioxide sensor, main control circuit and power module are all located, the exhaust port of the exhaust pipe is located on the housing, and the water vapor separation filter is located inside or outside the housing.

[0007] More preferably, the dual-module sensor is an infrared dual-module sensor based on correlation wheel filtering.

[0008] More preferably, the air inlet of the water vapor separator is connected to the gas discharge pipe of the sealed tank via a three-way valve.

[0009] This utility model has the following beneficial effects:

[0010] 1. This utility model discloses a greenhouse gas monitoring device for gas pipelines, which adopts a pipeline bypass access method and combines it with a gas pump to sample the gas to be detected and provide sufficient power for the gas flow in the monitoring device, and is easy to install.

[0011] 2. The monitoring device of this utility model realizes the monitoring of three greenhouse gases, methane, nitrous oxide and carbon dioxide, through dual-module sensors and carbon dioxide sensors. It also reduces the complexity of the detection components and their gas path structure, reduces the size of the device, and makes the device portable.

[0012] 3. The monitoring device of this utility model is equipped with a main control circuit module, which can use sensor data and has local storage and data upload functions, enabling remote monitoring.

[0013] 4. The monitoring device of this utility model is suitable for pipeline scenarios where gas in a closed container is naturally discharged through the internal and external pressure difference, and has the advantages of simple design, small size and easy installation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the gas flow direction of this utility model;

[0016] Figure 3 This is a control schematic diagram of the main control circuit module of this utility model;

[0017] Figure 4 This is a schematic diagram showing the state of the present invention connected to the gas pipeline.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Water vapor separator filter; 2. Air pump; 3. Dual-module sensor; 4. Carbon dioxide sensor; 5. Main control circuit module; 6. Power supply module; 7. First pipeline; 8. Second pipeline; 9. Third pipeline; 10. Exhaust pipeline; 11. Housing; 12. Three-way valve; 13. Gas emission pipe. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0021] See Figures 1 to 4 A greenhouse gas monitoring device for gas pipelines includes a water vapor separator 1, an air pump 2, a dual-module sensor 3 for detecting methane and nitrous oxide, a carbon dioxide sensor 4, a main control circuit module 5, and a power supply module 6. The air inlet of the water vapor separator 1 is connected to the gas discharge pipe 13 of a sealed tank via a three-way valve 12. In this embodiment, the monitoring device is installed in a pipeline configuration, serving as a branch bypass of the gas discharge pipe 13, facilitating installation. The air outlet of the water vapor separator 1 is connected to the air inlet of the air pump 2 via a first pipe 7. The air outlet of the air pump 2 is connected to the air inlet of the dual-module sensor 3 via a second pipe 8. The air outlet of the dual-module sensor 3 is connected to one interface of the carbon dioxide sensor 4 via a third pipe 9. The other interface of the carbon dioxide sensor 4 is connected to an exhaust pipe 10, which is open to the atmosphere. The dual-module sensor 3, carbon dioxide sensor 4, air pump 2, and power supply module 6 are all electrically connected to the main control circuit module 5.

[0022] It is also feasible to reverse the connection order of the dual-module sensor 3 and the carbon dioxide sensor 4 so that the gas to be detected passes through the carbon dioxide sensor 4 first and then through the dual-module sensor 3. This is an equivalent replacement connection method in this embodiment.

[0023] Since the monitoring device in this embodiment is connected to the gas pipeline as a bypass device and is applied to the gas discharge pipe 13 of the closed container (there is no device on the pipeline that generates gas power), there is a problem that the gas power in the gas discharge pipe 13 is weak. Therefore, this monitoring device is equipped with an air pump 2, which can not only draw the gas to be detected in the gas discharge pipe 13, but also provide sufficient power for the gas flow inside the monitoring device, so that the gas to be detected can flow through the water vapor separation filter 1, the dual-module sensor 3, the carbon dioxide sensor 4 and discharge the detected gas.

[0024] In this embodiment, the monitoring device first connects the water vapor separator 1 to the gas pipeline, and then connects the air pump 2 to the water vapor separator 1. This not only filters out moisture and ensures detection accuracy, but also prevents water vapor from entering the air pump 2 and affecting its service life.

[0025] Preferably, the dual-module sensor 3 is an infrared dual-module sensor based on correlation wheel filtering. It employs the principle of non-dispersive infrared absorption spectroscopy. When infrared light of a specific wavelength passes through the gas being measured, the gas absorbs the light energy, thereby detecting the concentration of the corresponding gas. Simultaneously, the module incorporates correlation wheel filtering, which effectively reduces background gas cross-interference. The dual-module sensor 3 can use an infrared module of model Wind-CH4 / N20-L1, which requires a flow rate of 0.8-1.2 L / min for the gas being measured. Therefore, it must be paired with a gas pump capable of achieving a flow rate of 1.2 L / min or higher.

[0026] The monitoring device in this embodiment, through the combined application of infrared dual-module sensor 3 and carbon dioxide sensor 4, not only realizes the detection of three gases: methane, nitrous oxide and carbon dioxide, but also significantly reduces the complexity of the detection components and their gas path structure, reduces the space occupancy rate, thereby reducing the size of the monitoring device and improving its portability.

[0027] The monitoring device also includes a housing 11, in which the air pump 2, dual-module sensor 3, carbon dioxide sensor 4, main control circuit and power module 6 are all located. The exhaust port of the exhaust pipe 10 is located on the housing 11, and the housing 11 is used to protect the monitoring device.

[0028] The outer dimensions of the casing of this utility model monitoring device can be: 350 mm long * 260 mm wide * 120 mm deep.

[0029] The water vapor separation filter 1 can complete water vapor filtration without power supply, and can be installed inside or outside the housing 11.

[0030] The main control circuit module 5 includes an MCU, a communication module, and a wired network port. The MCU connects to the air pump 2, the dual-module sensor 3, the carbon dioxide sensor 4, the communication module, and the power supply module 6. The wired network port connects to the communication module. The power supply module 6 has an AC220V input and a DC12V output. Modules directly connected to the power supply module 6 include the main control circuit module 5 and the dual-module sensor 3. The carbon dioxide sensor 4 is mounted on the main control circuit module 5 and powered by it. The air pump 2 is powered and controlled to start and stop by the main control circuit module 5. The MCU model is STM32L011F4P6TR.

[0031] The communication module may include a 4G communication module and a WIFI module.

[0032] Please see Figure 1 and Figure 2 The working principle of this utility model is as follows:

[0033] Step 1: Connect the water vapor separator 1 to the gas discharge pipe 13 of the sealed tank through the three-way valve 12. Power on the monitoring device, power module 6 supplies power to the main control circuit module 5, and the MCU starts the air pump 2 according to the preset time period, such as 10 minutes.

[0034] Step 2: The gas pump 2 draws the gas to be tested from the gas pipeline. After passing through the water vapor separation filter 1, the gas is introduced into the dual-module sensor 3 through the gas pump 2 to measure the values ​​of methane and nitrous oxide.

[0035] Step 3: Then introduce carbon dioxide sensor 4 to measure the carbon dioxide value;

[0036] Step 4: Then it is discharged through exhaust pipe 10;

[0037] Step 5: During the measurement, the main control circuit module 5 waits for the sampling to stabilize before recording the values ​​of methane, nitrous oxide, and carbon dioxide locally and uploading them to the platform.

[0038] This invention relates to a greenhouse gas monitoring device for gas pipelines. It employs a pipeline bypass connection method combined with a gas pump 2 for sampling of the gas to be detected and provides sufficient power for gas flow within the monitoring device, while also being easy to install. This monitoring device utilizes a dual-module sensor 3 and a carbon dioxide sensor 4 to simultaneously monitor methane, nitrous oxide, and carbon dioxide, reducing the complexity of the detection components and gas path structure, thus decreasing the device's size and making it portable. The device includes a main control circuit module 5 with local storage and data upload functions, enabling remote monitoring.

[0039] The above description is only a specific embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural transformations made based on the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A greenhouse gas monitoring device for a gas pipeline, characterized by: The device includes a water vapor separator, an air pump, a dual-module sensor for detecting methane and nitrous oxide, a carbon dioxide sensor, a main control circuit module, and a power supply module. The air inlet of the water vapor separator is connected to a gas pipeline, and the air outlet of the water vapor separator is connected to the air inlet of the air pump through a first pipeline. The air outlet of the air pump is connected to the air inlet of the dual-module sensor through a second pipeline. The air outlet of the dual-module sensor is connected to one interface of the carbon dioxide sensor through a third pipeline. The other interface of the carbon dioxide sensor is connected to an exhaust pipeline, which is open to the atmosphere. The dual-module sensor, carbon dioxide sensor, air pump, and power supply module are all electrically connected to the main control circuit module.

2. A greenhouse gas monitoring device for gas pipelines according to claim 1, characterized in that: It also includes a housing, in which the air pump, dual-module sensor, carbon dioxide sensor, main control circuit and power module are all located, the exhaust port of the exhaust pipe is located on the housing, and the water vapor separation filter is located inside or outside the housing.

3. A greenhouse gas monitoring device for gas pipelines according to claim 1, characterized in that: The dual-module sensor is an infrared dual-module sensor based on correlation wheel filtering.

4. A greenhouse gas monitoring device for gas pipelines according to claim 1, characterized in that: The air inlet of the water vapor separator is connected to the gas discharge pipe of the sealed tank via a three-way valve.

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