Fuel gas safety magic cube and flow real-time monitoring method thereof

Abstract

The invention discloses a fuel gas safety Rubik's cube and a flow real-time monitoring method thereof.The fuel gas safety Rubik's cube comprises a body, a monitoring pipeline, a pressure sensor A, a pressure sensor B and a pressure sensor C. The pressure sensor A and the pressure sensor B are correspondingly arranged at the gas inlet end and the gas outlet end of the monitoring pipeline respectively. The pressure sensor C is correspondingly arranged in the middle of the monitoring pipeline, and the gas safety magic cube calculates the real-time flow of the gas pipeline according to the pressure intensity values detected by the pressure sensor A, the pressure sensor B and the pressure sensor C in real time and the parameters of the gas pipeline. The environmental vibration noise is eliminated through multi-node difference, misjudgment caused by unstable pressure fluctuation of the gas pipeline can be eliminated, and the anti-interference performance is high. The method adapts to flow transient scenes, such as flow detection and identification at the ignition moment of a gas stove and a water heater, is quick in response, and is beneficial for helping the gas safety magic cube to accurately judge the flow change in various states such as leakage, ignition and gas leakage of a gas appliance.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of gas pipe network monitoring, in particular to a gas safety magic cube and a real-time flow monitoring method thereof. BACKGROUND

[0002] The current gas pipe network monitoring is mainly single-point or two-point pressure monitoring. The single-point pressure monitoring method is as follows: a time is predetermined, such as the non-gas time period in the early morning, the valve at the front end of the pipeline is closed, the gas equipment is not used, the pressure of the pipeline is maintained, and whether the pressure of the pipeline continuously decreases is monitored. If the pressure continuously decreases, it is judged that the pipeline has a leakage. Since there is no effective reference value for real-time pressure, if the sensor is damaged, the pressure value tested is inaccurate, and misjudgment will be caused.

[0003] The double-pressure sensor has two pressure values as references, but the anti-interference degree is poor, and slight fluctuations in the pressure values at both ends will greatly affect the measurement value, and the estimated flow is inaccurate. SUMMARY

[0004] The technical problem to be solved by the embodiments of the present application is to provide a gas safety magic cube and a real-time flow monitoring method thereof to improve the flow estimation accuracy.

[0005] In order to solve the above technical problem, the present application provides a gas safety magic cube, which comprises a body, a monitoring pipeline for connecting a gas pipeline is arranged in the body, and further comprises a pressure sensor A, a pressure sensor B and a pressure sensor C. The pressure sensor A and the pressure sensor B are respectively arranged at the gas inlet end and the gas outlet end of the monitoring pipeline, and the pressure sensor C is arranged at the middle position of the monitoring pipeline. The gas safety magic cube calculates the real-time flow of the gas pipeline according to the pressure values detected by the pressure sensor A, the pressure sensor B and the pressure sensor C and the parameters of the gas pipeline.

[0006] Further, the pressure sensor A, the pressure sensor B and the pressure sensor C are located on the same axis.

[0007] Further, the gas safety magic cube calculates the real-time flow of the gas pipeline according to the following formula: ; Wherein, Q is the real-time flow of the gas pipeline, k is the calibration coefficient, p is the gas density, A is the cross-sectional area of the gas pipeline, P A , P B , P C are the pressure values detected by the pressure sensor A, the pressure sensor B and the pressure sensor C respectively, is the estimated dynamic value at the middle position of the monitoring pipeline, , and M is the proportional coefficient.

[0008] Further, the gas safety magic cube estimates the real-time flow Q of the gas pipeline in real time based on a dynamic pressure change model and a fluid continuity equation in combination with parameters of the gas pipeline.

[0009] Correspondingly, the embodiment of the present application also provides a real-time flow monitoring method of the gas safety magic cube, comprising: Step 1: collecting the real-time detection air pressure values of the pressure sensor A, the pressure sensor B and the pressure sensor C; Step 2: calculating the real-time flow of the gas pipeline according to the collected air pressure values.

[0010] Further, in step 2, the real-time flow of the gas pipeline is calculated by the following formula: ; Wherein, Q is the real-time flow of the gas pipeline, k is a calibration coefficient, p is the gas density, A is the cross-sectional area of the gas pipeline, P A , P B , P C are the real-time detection air pressure values of the pressure sensor A, the pressure sensor B and the pressure sensor C respectively, is the estimated dynamic value at the middle position of the monitoring pipeline, , and M is a proportional coefficient.

[0011] Further, in step 2, the real-time flow Q of the gas pipeline is estimated in real time based on a dynamic pressure change model and a fluid continuity equation in combination with parameters of the gas pipeline.

[0012] The present application has the following advantages: 1. Strong anti-interference, the present application eliminates environmental vibration noise through multi-node differential, which is beneficial to exclude the misjudgment caused by unstable pressure fluctuation of the gas pipeline. 2. Fast response, the present application is suitable for flow transient scene, such as flow detection and identification of gas stove and water heater ignition moment, which is beneficial to help the gas safety magic cube to accurately judge the flow change under various conditions such as leakage and ignition, gas appliance leakage, etc. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a sectional view of the gas safety magic cube of the embodiment of the present application.

[0014] EXPLANATION OF REFERENCE NUMBERS Body 10, pressure sensor A 11, pressure sensor B 12, pressure sensor C 13, monitoring pipeline 20, air inlet end 21, air outlet end 22. DETAILED DESCRIPTION

[0015] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict, and the present application will be further described in detail in combination with the drawings and specific embodiments.

[0016] The directionality indication in the embodiments of the present application, such as up, down, left, right, front, back, etc., is only used to explain the relative positional relationship, motion condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indication also changes accordingly.

[0017] In addition, the description of "first", "second", etc. in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features.

[0018] The gas safety magic cube detects the pressure and flow of the gas pipeline in real time to determine potential safety hazards such as over-flow, under-flow, over-pressure, under-pressure, leakage, etc. For example, when the real-time pressure of the pipeline is detected to be greater than the preset maximum pressure value, it is over-pressure, which immediately triggers the pressure reducing valve or stops the machine. The risk of over-pressure exists: pipeline rupture, valve damage, etc. When the real-time pressure of the pipeline is detected to be less than the preset minimum pressure value, it is under-pressure, which needs to check whether the pump / compressor is faulty or blocked. The risk of under-pressure exists: interruption of delivery, equipment idling, etc.

[0019] Please refer to Figure 1 The gas safety magic cube of the embodiments of the present application includes a body, a monitoring pipeline, a pressure sensor A, a pressure sensor B, and a pressure sensor C.

[0020] The monitoring pipeline is arranged in the body and is used to access the gas pipeline. The pressure sensor A and the pressure sensor B are respectively arranged at the gas inlet end and the gas outlet end of the monitoring pipeline. The pressure sensor C is arranged at the middle position of the monitoring pipeline. The gas safety magic cube calculates the real-time flow of the gas pipeline according to the pressure values detected by the pressure sensor A, the pressure sensor B, and the pressure sensor C and the parameters of the gas pipeline.

[0021] The present application uses three pressure sensors to monitor the pressure of the pipeline gas at multiple points, calculates the pressure difference at multiple points, estimates the real-time flow, and the multiple-point pressure and pressure difference value can greatly improve the sensitivity and anti-interference, and improve the judgment accuracy.

[0022] As an implementation manner, the pressure sensor A, the pressure sensor B, and the pressure sensor C are located on the same axis to ensure that the spacing between the measurement points is accurately known. The pressure sensor A, the pressure sensor B, and the pressure sensor C simultaneously collect the real-time pressure values P A , P B , and P C .

[0023] As an implementation manner, the gas safety magic cube calculates the real-time flow of the gas pipeline according to the following formula: ; wherein Q is the real-time flow of the gas pipeline, k is a calibration coefficient, p is the gas density, A is the cross-sectional area of the gas pipeline, P A , P B , P C are the real-time detected gas pressure values of the pressure sensor A, the pressure sensor B, and the pressure sensor C, respectively, is the estimated dynamic value at the middle position of the pipeline, M is a proportional coefficient.

[0024] As an implementation, the gas safety magic cube estimates the real-time flow Q of the gas pipeline in real time based on a dynamic pressure change model and a fluid continuity equation in combination with the parameters of the gas pipeline.

[0025] The real-time flow monitoring method of the gas safety magic cube includes steps 1 and 2.

[0026] Step 1: Collect the real-time detected gas pressure values of the pressure sensor A, the pressure sensor B, and the pressure sensor C.

[0027] Step 2: Calculate the real-time flow of the gas pipeline according to the collected gas pressure values to realize flow detection.

[0028] As an implementation, in step 2, the real-time flow of the gas pipeline is calculated using the following formula: ; wherein Q is the real-time flow of the gas pipeline, k is a calibration coefficient, p is the gas density, A is the cross-sectional area of the gas pipeline, P A , P B , P C are the real-time detected gas pressure values of the pressure sensor A, the pressure sensor B, and the pressure sensor C, respectively, is the estimated dynamic value at the middle position of the pipeline, M is a proportional coefficient.

[0029] As an implementation, in step 2, the real-time flow Q of the gas pipeline is estimated in real time based on a dynamic pressure change model and a fluid continuity equation in combination with the parameters of the gas pipeline.

[0030] Although embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas safety magic cube, comprising a main body, wherein a monitoring pipe for accessing a gas pipeline is provided in the main body, characterized in that: It also includes pressure sensor A, pressure sensor B, and pressure sensor C. Pressure sensor A and pressure sensor B are respectively arranged at the air inlet end and the air outlet end of the monitoring pipeline, and pressure sensor C is correspondingly arranged at the middle position of the monitoring pipeline. The gas safety cube calculates the real-time flow rate of the gas pipeline based on the pressure values ​​detected in real time by pressure sensor A, pressure sensor B, and pressure sensor C and the gas pipeline parameters.

2. The gas safety magic cube according to claim 1, characterized in that: The pressure sensor A, pressure sensor B, and pressure sensor C are located on the same axis.

3. The gas safety magic cube according to claim 1, characterized in that: The gas safety cube calculates the real-time flow rate of the gas pipeline according to the following formula: ； Among them, Q is the real-time flow rate of the gas pipeline, k is the calibration coefficient, ρ is the gas density, A is the cross-sectional area of ​​the gas pipeline, P A 、P B 、P C They are the real-time air pressure values ​​detected by pressure sensor A, pressure sensor B, and pressure sensor C respectively. To monitor the estimated dynamic value at the middle position of the pipeline, , M is the proportional coefficient.

4. The gas safety magic cube according to claim 1, characterized in that: The gas safety cube estimates the real-time flow rate Q of the gas pipeline in real time based on the dynamic pressure change model and the fluid continuity equation in combination with the gas pipeline parameters.

5. A method for real-time flow monitoring of a gas safety cube according to any one of claims 1 to 4, characterized in that: include: Step 1: Collect the real-time air pressure values ​​detected by pressure sensor A, pressure sensor B, and pressure sensor C; Step 2: Calculate the real-time flow rate of the gas pipeline based on the collected gas pressure value.

6. The method for real-time flow monitoring of a gas safety cube according to claim 5, characterized in that: In step 2, the real-time flow rate of the gas pipeline is calculated using the following formula: ； Among them, Q is the real-time flow rate of the gas pipeline, k is the calibration coefficient, ρ is the gas density, A is the cross-sectional area of ​​the gas pipeline, P A 、P B 、P C They are the real-time air pressure values ​​detected by pressure sensor A, pressure sensor B, and pressure sensor C respectively. To monitor the estimated dynamic value at the middle position of the pipeline, , M is the proportional coefficient.

7. The method for real-time flow monitoring of a gas safety cube according to claim 5, characterized in that: In step 2, based on the dynamic pressure change model and the fluid continuity equation, the real-time flow rate Q of the gas pipeline is estimated in real time in combination with the gas pipeline parameters.

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