Gas leakage monitoring method

Abstract

The invention discloses a gas leakage monitoring method, which is used for monitoring indoor gas leakage, and comprises a monitoring device for monitoring the working state of gas equipment, a flow meter arranged on a gas conveying pipeline, and a controller connected with the monitoring device and the flow meter, and when the gas equipment is in a shutdown state and the flow meter feeds back a numerical value to the controller, indoor gas leakage is judged. The monitoring device and the flow meter are matched with each other, whether the indoor gas leaks or not is monitored by judging the operation states of the gas equipment and the conveying pipeline, a traditional monitoring mode adopting a gas detector is abandoned, and the monitoring precision is high.

Description

Technical Field

[0001] The present invention relates to the technical field of gas monitoring, and in particular to a gas leakage monitoring method. Background Art

[0002] Gas is a general term for gaseous fuels, which can burn and release heat for use by residents and industrial enterprises. If gas leaks during the use of industrial, commercial and household, it may cause poisoning and suffocation to the user, and may also cause safety hazards such as combustion, fire and explosion. If leakage occurs in urban pipelines and gas gate stations, in addition to causing casualties, it will also cause economic losses and environmental damage. Gas leakage generally occurs during the transportation process, such as pipeline damage caused by pipeline aging, excavation and geological subsidence. Gas leakage can also occur at the end of industrial, commercial and household users, that is, indoors. In the prior art, gas leakage is generally monitored by gas leak detectors, which detect methane content in the air through methane concentration detectors or laser transmitters. However, in a ventilated environment or in long-term use, the concentration of methane in the air may be lower than the alarm threshold, or it may be wrapped in oil smoke to isolate methane and sensors, or the sensors may age or be contaminated and fail, making it difficult for methane concentration detectors to effectively monitor gas leaks. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a gas leakage monitoring method to realize leakage monitoring of the gas use end and the transmission process.

[0004] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] The present invention provides a gas leakage monitoring method for indoor gas leakage monitoring, comprising a monitoring device for monitoring the working state of a gas device, a flow meter arranged on a gas transmission pipeline, and a controller respectively connected to the monitoring device and the flow meter. When the gas device is in a shutdown state and the flow meter has a numerical value fed back to the controller, it is determined that there is an indoor gas leakage. The monitoring device and the flow meter cooperate with each other to monitor whether a gas leakage occurs in the indoor gas by judging the operating state of the gas device and the transmission pipeline, thereby abandoning the traditional monitoring method using a gas detector. Specifically, the monitoring device judges the operating state by the temperature change of the gas device.

[0006] In some embodiments, the monitoring device includes a first temperature sensor arranged near the gas end of the gas equipment and a second temperature sensor arranged outside the gas equipment. When the sum of the temperature feedback from the first temperature sensor plus the compensated temperature is less than the value feedback from the second temperature sensor plus the compensated temperature value, the gas equipment is in a shutdown state.

[0007] In some embodiments, the monitoring device includes a third temperature sensor arranged near the gas end of the gas equipment, and the controller is set with a temperature threshold when the gas equipment is running. When the value feedback from the third temperature sensor is less than the temperature threshold when the gas equipment is running, the gas equipment is in a shutdown state.

[0008] As a preferred solution of the above embodiment, it also includes a gas leakage alarm device connected to the controller, and the gas leakage alarm device includes a valve arranged on the gas pipeline, a voice alarm device and a gateway connected to the mobile terminal, so as to improve the safety of use.

[0009] The present invention also provides another gas leakage monitoring method for gas transmission pipeline leakage monitoring. The gas transmission pipeline includes multiple monitoring sections, each of which includes an upper pipeline and multiple lower pipelines connected to the upper pipeline, and each upper pipeline and lower pipeline is arranged with a flow meter. The monitoring section determines the gas leakage through the following model:

[0010]

[0011] In the formula, L1 represents the gas output value of the upstream pipeline, It represents the gas output value of the ith lower-level pipeline, and n is the number of lower-level pipelines.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The present invention utilizes the monitoring device and flow meter to cooperate with each other, and monitors whether there is gas leakage in the indoor gas by judging the operating status of the gas equipment and the transmission pipeline, abandoning the traditional monitoring method using gas detectors, and has high monitoring accuracy.

[0014] 2. The present invention divides the gas transmission pipeline into multiple monitoring sections, each of which includes an upper pipeline and multiple lower pipelines connected to the upper pipeline. The characteristic that the gas flow value passing through the upper pipeline is equal to the sum of the flow values ​​passing through multiple lower pipelines is used to monitor whether gas leakage occurs in each monitoring section, thereby quickly determining the scope of the gas leakage and facilitating maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a principle block diagram of using a first temperature sensor and a second temperature sensor to monitor the working state of a gas device to monitor indoor gas leakage;

[0016] Figure 2 It is a principle block diagram of using a third temperature sensor to monitor the working state of the gas equipment to monitor indoor gas leakage;

[0017] Figure 3 It is a structural block diagram of the monitoring section in Example 3. DETAILED DESCRIPTION

[0018] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0019] Example 1

[0020] A gas leak monitoring method, such as Figure 1-2 As shown, it is used for indoor gas leakage monitoring, including a monitoring device for monitoring the working status of the gas equipment and a flow meter arranged on the gas transmission pipeline, and a controller connected to the monitoring device and the flow meter respectively. Specifically, the monitoring device monitors the operating status of the gas equipment and feeds back to the controller, the flow meter monitors the flow value in the gas transmission pipeline in real time and feeds back to the controller. When the gas equipment is in a shutdown state and the flow meter has a numerical value fed back to the controller, the controller determines that there is a gas leak in the room. Specifically, the above-mentioned monitoring device determines the operating status by the temperature change of the gas equipment.

[0021] In some embodiments, Figure 1 As shown, the above-mentioned monitoring device includes a first temperature sensor arranged near the gas end of the gas equipment and a second temperature sensor arranged outside the gas equipment. When the sum of the temperature feedback from the first temperature sensor plus the compensation temperature is less than the value feedback from the second temperature sensor plus the compensation temperature value, the gas equipment is in a shutdown state. Specifically, the compensation temperature value is set because it is considered that some gas devices have a shell that wraps the combustion end, such as a gas water heater, whose combustion end is located in the shell. At this time, there is a temperature difference between the inside and outside of the shell. When not burning, the temperature value sensed by the first temperature sensor inside the shell may be lower than the temperature value sensed by the second temperature sensor outside the shell, thereby misjudging the gas equipment in a shutdown state. Therefore, a compensation temperature value is added to the temperature value sensed by the first temperature sensor as the final measured value, so as to ensure that the judgment of the operating status of the gas equipment is more accurate.

[0022] In some embodiments, Figure 2 As shown, the above-mentioned monitoring device includes a third temperature sensor arranged near the gas end of the gas equipment, and the controller is set with a temperature threshold when the gas equipment is running. When the value fed back by the third temperature sensor is less than the temperature threshold when the gas equipment is running, the gas equipment is in a shutdown state, wherein the temperature threshold when the gas equipment is running is 800-1700 degrees.

[0023] The present invention utilizes the cooperation between the monitoring device and the flow meter to monitor whether there is a gas leak in the indoor gas by judging the operating status of the gas equipment and the transmission pipeline, abandoning the traditional monitoring method using a gas detector, and having high monitoring accuracy.

[0024] Example 2

[0025] When it is determined that indoor gas leaks, in order to improve personal safety, based on the above embodiment, Figure 1-2 As shown, the above also includes a gas leakage alarm device connected to the controller. Specifically, the gas leakage alarm device includes a valve arranged on the gas pipeline, a voice alarm device and a signal transmission module connected to the mobile terminal. When indoor gas leaks, the controller cuts off the gas source through the set valve brake, the voice alarm sounds an alarm indoors, and the signal transmission module is connected to the device on the mobile terminal to remind the user.

[0026] Example 3

[0027] A gas leakage monitoring method is used for gas transmission pipeline leakage monitoring, the gas transmission pipeline includes multiple monitoring sections, such as Figure 3 As shown, each monitoring section includes an upper pipeline and multiple lower pipelines connected to the upper pipeline, and each upper pipeline and lower pipeline is arranged with a flow meter. The monitoring section determines the gas leakage through the following model:

[0028]

[0029] In the formula, L1 represents the gas output value of the upstream pipeline, It represents the gas output value of the ith lower-level pipeline, and n is the number of lower-level pipelines.

[0030] In this embodiment, the gas transmission pipeline is divided into multiple monitoring sections, each monitoring section includes an upper pipeline and multiple lower pipelines connected to the upper pipeline, and the characteristic that the gas flow value through the upper pipeline is equal to the sum of the flow values ​​through the multiple lower pipelines is used to monitor whether a gas leak occurs in each monitoring section. Specifically, the gas pipeline includes a gas station output pipeline, the gas station output pipeline is connected to multiple street pipelines, the street pipeline is connected to multiple community pipelines, the community pipeline is connected to multiple building pipelines, the building pipeline is connected to multiple household pipelines, and flow meters are arranged on the gas station output pipeline and each street pipeline, community pipeline and building pipeline. In specific implementation, the gas pipeline is taken as the upper pipeline and the street pipeline as the lower pipeline to form a monitoring section, the street pipeline is taken as the upper pipeline and the community pipeline is taken as the lower pipeline to form a monitoring section, and the community pipeline is taken as the upper pipeline and the building pipeline is taken as the lower pipeline to form a monitoring section, thereby dividing the gas pipeline into multiple monitoring sections. At the same time, the characteristic that the gas flow value passing through the upper pipeline is equal to the sum of the flow values ​​passing through multiple lower pipelines is used to monitor whether gas leakage occurs in each monitoring section, and then quickly determine the scope of the gas leakage. When a gas pipeline leaks, the scope of the leakage can be quickly determined to facilitate maintenance operations.

[0031] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A gas leak monitoring method, characterized in that: Used for indoor gas leakage monitoring, including a monitoring device for monitoring the working status of the gas equipment and a flow meter arranged on the gas transmission pipeline, and a controller connected to the monitoring device and the flow meter respectively. When the gas equipment is in a shutdown state and the flow meter has a numerical value fed back to the controller, it is determined to be an indoor gas leakage.

2. The gas leakage monitoring method according to claim 1, characterized in that: The monitoring device includes a first temperature sensor arranged near the gas end of the gas equipment and a second temperature sensor arranged outside the gas equipment. When the sum of the temperature feedback from the first temperature sensor plus the compensation temperature is less than the value feedback from the second temperature sensor, the gas equipment is in a shutdown state.

3. The gas leakage monitoring method according to claim 1, characterized in that: The monitoring device includes a third temperature sensor arranged near the gas end of the gas equipment. The controller is set with a temperature threshold when the gas equipment is running. When the value fed back by the third temperature sensor is less than the temperature threshold when the gas equipment is running, the gas equipment is in a shutdown state.

4. The gas leakage monitoring method according to any one of claims 1 to 3, characterized in that: It also includes a gas leakage alarm device connected to the controller, and the gas leakage alarm device includes a valve arranged on the gas pipeline, a voice alarm device and a gateway connected to the mobile terminal.

5. A gas leak monitoring method, characterized in that: Used for gas transmission pipeline leakage monitoring, the gas transmission pipeline includes multiple monitoring sections, each of which includes an upper pipeline and multiple lower pipelines connected to the upper pipeline, and each of the upper pipeline and lower pipeline is arranged with a flow meter. The monitoring section determines gas leakage through the following model: In the formula, L1 represents the gas output value of the upstream pipeline, It represents the gas output value of the ith lower-level pipeline, and n is the number of lower-level pipelines.

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