Iot stink device

Abstract

This utility model discloses an IoT-based odorization device, belonging to the technical field of natural gas odorization equipment. It includes an odorization device connected to the natural gas pipeline at the city gate, an online odorant monitoring device connected to the natural gas pipeline at the end point, and a cloud server. The odorization device includes an odorizer, which is connected to a 4G DTU at the city gate via a drive control circuit. The online odorant monitoring device includes a monitoring shunt pipe, to which an odorant monitor is connected, and to which the end-point 4G DTU is connected. The cloud server is connected to the 4G DTU at the city gate and the end-point 4G DTU via a 4G network. The odorant concentration at the end of the natural gas pipeline is monitored by multiple online odorant monitoring devices at the end of the pipeline. The data is then analyzed by the IoT cloud server, which guides the odorization device to adjust the odorization standard and frequency, ensuring that the odorant concentration at the end of the natural gas pipeline meets the requirements.

Description

Technical Field

[0001] This utility model belongs to the technical field of natural gas odorization equipment, specifically an Internet of Things (IoT) odorization device. Background Technology

[0002] Odor control of natural gas is a crucial public safety measure. It utilizes the addition of special odorants to natural gas to compensate for its colorless and odorless nature, providing a valuable "olfactory alarm" in the event of a leak. This allows people to detect danger early and take action, significantly reducing fires, explosions, and asphyxiation accidents caused by natural gas leaks, thus protecting lives and property.

[0003] As a crucial node for long-distance pipelines entering urban gas networks, the natural gas gate station is the primary and ideal location for centralized and precise odorization. The core of its odorization method is to continuously and stably inject liquid odorant into a high-pressure, high-flow-rate natural gas stream at a precise ratio, ensuring downstream users can detect a sufficient concentration of odor. Currently, pump-injection of odorant into natural gas is the most widely used and most precise odorization method at gate stations both domestically and internationally. For example, Chinese utility model patent document CN207975483U describes a natural gas odorization machine assembly, including an odorant storage tank, an odorization pump, a controller, pipelines, and a natural gas pipeline. The storage tank contains odorant, and its bottom is connected to the odorization pump via a pipeline. The odorization pump is connected to the natural gas pipeline via a pipeline. An air flow meter is connected to the natural gas pipeline, and an odorization valve and a liquid flow meter are connected to the pipeline between the odorization pump and the natural gas pipeline. By setting up an air flow meter, a hydraulic flow meter, and an odorizing valve, the ratio of natural gas to odorant can be determined through the air flow meter and the hydraulic flow meter, and the odorant can be adjusted to achieve a suitable ratio of natural gas to odorant.

[0004] However, current natural gas gate station odorization devices can only control the odorization dosage by monitoring the flow rate of the natural gas pipeline at the gate station or by monitoring the concentration of the odorant at the gate station. They cannot achieve closed-loop control of the odorization dosage at the gate station by monitoring the concentration of the odorant at the end of the natural gas pipeline. For example, the distance from the natural gas gate station to the end of the natural gas pipeline is relatively long. The commonly used natural gas odorant, tetrahydrothiophene, is an organic substance with strong oleophilicity and is easily adsorbed by the natural gas pipeline. Therefore, although the odorization dosage at the gate station meets the standard, the odorant content at the end of the pipeline may not meet the relevant standards, which can easily cause safety hazards.

[0005] As a new technology, the Industrial Internet of Things (IIoT) plays an excellent role in equipment condition monitoring and predictive maintenance, production process optimization, and industrial automation. Therefore, introducing the IIoT into the field of natural gas odorization equipment can largely solve the above problems. Utility Model Content

[0006] This invention proposes an IoT-based odorization device. It monitors the concentration of odorant at the end of the natural gas pipeline network through multiple online monitoring devices at the pipeline ends. The data is then analyzed by an IoT cloud server, which guides the odorization device to adjust the odorization standard and frequency. This solves the problem in the prior art that the natural gas gate station odorization device cannot control the odorization dosage based on the concentration of odorant at the end of the natural gas pipeline.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An Internet of Things (IoT) odorization device includes an odorization device connected to a gate station natural gas pipeline, an online odorant monitoring device connected to a terminal natural gas pipeline, and a cloud server;

[0009] The odorization device includes an odorizer, which is connected to a gate station 4G DTU via a drive control circuit.

[0010] The online monitoring device for odorant includes a monitoring shunt pipe, on which an odorant monitor is connected, and on which a terminal 4G DTU is connected;

[0011] The cloud server is connected to the gate station 4G DTU and the terminal 4G DTU via a 4G network.

[0012] The odorant monitor and the odorization mechanism at the gate station form the sensing layer of the Internet of Things (IoT) in this device. The 4G DTU at the gate station, the 4G DTU at the end of the pipeline, and the 4G cellular network constitute the transmission layer of the IoT. The cloud server serves as the platform layer of the IoT, used for equipment management, data access, storage, processing, analysis, and application support. This includes controlling the odorant dosage at the gate station based on the odorant concentration in the end-of-pipe natural gas pipeline and storing and recording odorization data. The cloud server can connect to the computer control terminal for natural gas odorization or a mobile app via a 4G network, serving as the application layer of the IoT, allowing staff to easily create odorization plans or trace historical odorization data as needed.

[0013] Preferably, the drive control circuit is a power driver, which is connected to the gate station 4G DTU via an RS485 serial port.

[0014] Preferably, the odorizing machine includes an odorizing agent storage tank, the bottom of which is connected to an odorizing pump via a pipe, the outlet of which is connected to the gate station natural gas pipeline via an odorizing pipe, and the motor of which is connected to the output of a power driver.

[0015] Preferably, the odorant storage tank is equipped with a level gauge, which is connected to the gate station 4GDTU via an RS485 serial port.

[0016] Preferably, the outlet end of the odorizing pump is connected to an electric three-way regulating valve. One outlet end of the electric three-way regulating valve is connected to the odorizing pipeline, and the other outlet end is connected to a return pipe. One end of the return pipe is connected to the top of the odorizing agent storage tank. The electric three-way regulating valve is connected to a power driver.

[0017] Preferably, the odorant monitor is a tetrahydrothiophene concentration monitor, which is connected to the terminal 4G DTU via an RS485 serial port.

[0018] Preferably, a flow meter is installed on the terminal natural gas pipeline, and the flow meter is connected to the terminal 4G DTU via an RS485 serial port.

[0019] Beneficial effects: Compared with the prior art, the present invention can achieve at least the following technical effects;

[0020] 1. This utility model monitors the concentration of odorant at the end of the natural gas pipeline network through multiple online monitoring devices at the end of the natural gas pipeline network, and then transmits the data to a cloud server via the Internet of Things. After data analysis, the cloud server guides the odorant devices to adjust the odorization standard and odorization frequency, ensuring that the concentration of odorant at the end of the natural gas pipeline meets the requirements.

[0021] 2. The odorizing pump of this utility model is connected to the return pipe through an electric three-way regulating valve. When the odorizing dosage is adjusted within a large range, the output power of the odorizing pump can be adjusted by the power driver, thereby adjusting the odorizing flow rate to adapt to a large range of adjustments. When the odorizing dosage is adjusted within a small range, the odorizing flow rate can be adjusted by the electric three-way regulating valve to avoid the odorizing pump frequently changing power and affecting its service life.

[0022] 3. This utility model installs a flow meter at the end of the natural gas pipeline and uploads the flow data and odorant concentration data to the cloud server through a 4G DTU. The odorization scheme is formulated by comprehensively considering the flow data and odorant concentration data, which further ensures the accuracy of odorization. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0024] Figure 2 This is a schematic diagram of the odor-adding device of this utility model.

[0025] Figure 3 This is a schematic diagram of the online monitoring device for odorants according to this utility model.

[0026] In the diagram: 1. Cloud server; 2. Odorization device; 201. Gate station 4G DTU; 202. Return pipe; 203. Power driver; 204. Odorizer storage tank; 205. Odorization pump; 206. Odorization pipeline; 207. Electric three-way regulating valve; 208. Level gauge; 3. Gate station natural gas pipeline; 4. Odorizer online monitoring device; 401. Terminal 4G DTU; 402. Odorizer monitor; 403. Monitoring diversion pipe; 404. Flow meter; 5. Terminal natural gas pipeline. Detailed Implementation

[0027] The present invention will be further described below with reference to specific implementation examples. However, the present invention is not limited to these embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] like Figure 1 As shown, this utility model proposes an Internet of Things odorization device, including an odorization device 2 connected to the gate station natural gas pipeline 3, an odorant online monitoring device 4 connected to the terminal natural gas pipeline 5, and a cloud server 1;

[0029] The odorization device 2 includes an odorizer, which is connected to a gate station 4G DTU 201 via a drive control circuit; the odorant online monitoring device 4 includes a monitoring shunt pipe 403, which is connected to an odorant monitor 402, which is connected to a terminal 4G DTU 401; the cloud server 1 is connected to the gate station 4G DTU 201 and the terminal 4G DTU 401 via a 4G network.

[0030] The natural gas gate station is a core node in the gas transmission and distribution system. Therefore, this invention connects the odorization device 2 to the natural gas pipeline 3 at the gate station to add odorant to the natural gas pipeline 3. The odorant online monitoring device 4 is installed on the terminal natural gas pipeline 5. The natural gas at the end of the pipeline enters the odorant monitor 402 through the monitoring diversion pipe 403. The odorant monitor 402 monitors whether the odorant concentration at the end of the natural gas meets the standard. The monitoring diversion pipe 403 is equipped with a valve to facilitate the maintenance and replacement of the odorant monitor 402 and other devices. The odorant monitor 402 converts the odorant concentration data in the terminal natural gas pipeline 5 into an electrical signal and uploads it to the cloud server 1 through the terminal 4G DTU 401. The cloud server 1 analyzes the data uploaded by the terminal 4G DTU 401 and adjusts the odorant dosage and frequency through the gate station 4G DTU 201 and the drive control circuit to form a closed-loop control, so that the odorant concentration in the terminal natural gas pipeline 5 meets the standard.

[0031] In this embodiment, the odorant monitor 402 and the electric system of the odorizer (such as a motor and electric valve) constitute the sensing layer of the Internet of Things (IoT). The data transmission unit (mainly including the terminal 4G DTU 401 and the gate station 4G DTU 201) constitutes the transmission layer of the IoT. The cloud server 1 is the platform layer of the IoT, used for data analysis and storage. The cloud server 1 can simultaneously connect to multiple gate station odorizers through the gate station 4G DTU 201 and connect to multiple terminal natural gas pipeline 5 odorant online monitoring devices 4 through the terminal 4G DTU 401. At the same time, the cloud server 1 can connect to the computer control terminal of natural gas odorization or a mobile APP through a 4G network, serving as the application layer of the IoT for this device, facilitating staff to formulate odorization plans as needed or to trace historical odorization data.

[0032] Furthermore, the drive control circuit is a power driver 203, which is connected to the gate station 4G DTU 201 via an RS485 serial port; that is, the gate station 4G DTU 201 controls the start and stop of the odorizer and the output power through the power driver 203 according to the instructions of the cloud server 1, thereby controlling the frequency and dosage of odorization.

[0033] like Figure 2 As shown, based on this, the odorizing machine includes an odorant storage tank 204. The bottom of the odorant storage tank 204 is connected to an odorizing pump 205 via a pipe. The outlet end of the odorizing pump 205 is connected to the gate station natural gas pipeline 3 via an odorizing pipeline 206. The motor of the odorizing pump 205 is connected to the output end of a power driver 203. The power driver 203 controls the odorizing flow rate by changing the output power of the motor of the odorizing pump 205.

[0034] Furthermore, the outlet end of the odorizing pump 205 is connected to an electric three-way regulating valve 207. One outlet end of the electric three-way regulating valve 207 is connected to the odorizing pipe 206, and the other outlet end is connected to a return pipe 202. One end of the return pipe 202 is connected to the top of the odorizing agent storage tank 204. The electric three-way regulating valve 207 is connected to the power driver 203.

[0035] Through the above settings, this utility model provides two methods for adjusting the odorant flow rate of the odorizer. When the gas consumption at the terminal is large, the power driver 203 changes the output power of the motor of the odorizer pump 205 to quickly replenish the odorant in the natural gas. When the gas consumption at the terminal is small, the electric three-way regulating valve 207 changes the flow distribution of the odorant in the odorizer pipeline 206 and the return pipe 202, so that part of the odorant output by the odorizer pump 205 is injected into the gate station natural gas pipeline 3 through the odorizer pipeline 206, and part of it flows back to the odorant storage tank 204 through the return pipe 202. This allows for faster adjustment of the odorant flow rate under the condition of constant odorizer pump output power, while avoiding frequent power changes of the odorizer pump 205 that could affect its service life.

[0036] Furthermore, a level gauge 208 is connected to the odorant storage tank 204, and the level gauge 208 is connected to the gate station 4G DTU 201 via an RS485 serial port;

[0037] The 4G DTU 201 at the gate station can sense changes in the odorant level in the odorant storage tank 204 through the level gauge 208 and upload the odorant level data in the odorant storage tank 204 to the cloud server 1 to record the odorant dosage each time for easy subsequent query. It can also issue an early warning when the odorant level in the odorant storage tank 204 is too low.

[0038] Furthermore, the odorant monitor 402 is a tetrahydrothiophene concentration monitor, which is connected to the terminal 4G DTU 401 via an RS485 serial port.

[0039] In this embodiment, the odorant used is tetrahydrothiophene, which is currently commonly used. Therefore, the odorant monitor 402 is a tetrahydrothiophene concentration monitor, which converts the odorant concentration data in the terminal natural gas pipeline 5 into an electrical signal and transmits it to the terminal 4G DTU 401 through the RS485 serial port.

[0040] Furthermore, a flow meter 404 is installed on the terminal natural gas pipeline 5, and the flow meter 404 is connected to the terminal 4G DTU 401 via an RS485 serial port;

[0041] like Figure 3As shown, the terminal 4G DTU 401 is connected to receive flow data and odorant concentration data from the terminal natural gas pipeline 5 and uploads them to the cloud server 1. The cloud server 1 comprehensively adjusts the odorization frequency and flow rate of the odorization device 2 based on the flow data and odorant concentration data of the terminal natural gas pipeline 5. Specifically, as mentioned above, this utility model provides two methods for adjusting the odorization flow rate of the odorizer. When the sum of the flow readings of all flow meters 404 in the device is less than the set threshold, it indicates that the current gas consumption at the terminal is small, and the odorization device 2 adjusts the odorant flow rate through the electric three-way regulating valve 207. When the sum of the flow readings of all flow meters 404 in the device reaches or exceeds the set threshold, it indicates that the current gas consumption at the terminal of the natural gas pipeline is large, and the odorization device 2 adjusts the odorant flow rate by changing the output power of the odorization pump 205.

[0042] In this embodiment, the data transmission unit (including the gate station 4G DTU 201 and the terminal 4G DTU 401) transmits data with sensors (such as the odorant monitor 402) and actuators (such as the power driver 203) via an RS485 serial port. RS485 uses two lines (line A and line B) to transmit signals. The transmitting end sends the voltage difference between the two signal lines. External electromagnetic interference typically generates the same noise voltage on both signal lines. Since the receiving end only monitors the difference between the two lines, this common-mode noise is effectively canceled out. This gives RS485 good anti-interference capabilities in industrial environments with severe electrical noise, such as natural gas gate stations.

[0043] Meanwhile, this utility model uses a 4G DTU module as the data transmission unit, which has the functions of disconnection reconnection and data caching. When the 4G network is interrupted or the signal is lost, the DTU will automatically try to reconnect to the network. At the same time, during the network outage, the DTU has a local data caching (store-and-forward) function, which can temporarily store the data that could not be sent locally and send it first after the network is restored, so as to avoid data loss and ensure the integrity of critical data.

Claims

1. An Internet of Things (IoT) odor-adding device, characterized in that, It includes an odorization device (2) connected to the natural gas pipeline (3) at the gate station, an online odorant monitoring device (4) connected to the natural gas pipeline (5) at the end, and a cloud server (1); The odorization device (2) includes an odorizer, which is connected to a gate station 4G DTU (201) via a drive control circuit; The online monitoring device (4) for odorant includes a monitoring shunt tube (403), on which an odorant monitor (402) is connected, and on which a terminal 4G DTU (401) is connected; The cloud server (1) is connected to the gate station 4G DTU (201) and the terminal 4G DTU (401) via a 4G network.

2. The IoT odorization device according to claim 1, characterized in that, The drive control circuit is a power driver (203), which is connected to the gate station 4G DTU (201) via an RS485 serial port.

3. The IoT odorization device according to claim 2, characterized in that, The odorizer includes an odorant storage tank (204), and an odorant pump (205) is connected to the bottom of the odorant storage tank (204) via a pipe. The outlet end of the odorant pump (205) is connected to the gate station natural gas pipeline (3) via an odorant pipeline (206). The motor of the odorant pump (205) is connected to the output end of a power driver (203).

4. The IoT odorization device according to claim 3, characterized in that, The outlet end of the odorizing pump (205) is connected to an electric three-way regulating valve (207). One outlet end of the electric three-way regulating valve (207) is connected to the odorizing pipe (206), and the other outlet end is connected to a return pipe (202). One end of the return pipe (202) is connected to the top of the odorant storage tank (204). The electric three-way regulating valve (207) is connected to a power driver (203).

5. The IoT odorization device according to claim 3 or 4, characterized in that, The odorant storage tank (204) is connected to a level gauge (208), which is connected to the gate station 4G DTU (201) via an RS485 serial port.

6. The IoT odorization device according to claim 1, characterized in that, The odorant monitor (402) is a tetrahydrothiophene concentration monitor, which is connected to the terminal 4G DTU (401) via an RS485 serial port.

7. The IoT odorization device according to claim 6, characterized in that, A flow meter (404) is installed on the terminal natural gas pipeline (5), and the flow meter (404) is connected to the terminal 4G DTU (401) via an RS485 serial port.

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