An industrial furnace gas pipeline leakage detection device

Abstract

The utility model relates to an industrial furnace gas pipeline leakage detection device suitable for burning combustible gas such as coal gas or natural gas, which comprises a gas flow meter installed behind a gas pipeline main electromagnetic valve of an industrial furnace gas main pipeline, various gas branch pipelines connected with the gas flow meter, gas branch pipeline manual valves installed on the various gas branch pipelines, gas branch pipeline electromagnetic valves connected with the gas branch pipeline manual valves, an isolation transmitter for converting a gas flow signal connected to a signal output end of the gas flow meter, a PLC communication module for displaying the gas flow signal connected to a signal output end of the isolation transmitter, and an industrial computer connected to a communication interface of the PLC communication module, which can quickly determine a jammed leakage fault of an industrial furnace gas electromagnetic valve, eliminate safety risks and ensure production safety.

Description

Technical Field

[0001] This utility model relates to a gas pipeline leakage detection device suitable for industrial furnaces and kilns that burn combustible gases such as coal gas or natural gas. Background Technology

[0002] Currently, industrial furnaces primarily use gaseous and liquid fuels, with natural gas, blast furnace gas, and coke oven gas being the main types. If the solenoid valve of the gas pipeline in an industrial furnace becomes blocked, gas leaks can occur. When the gas inside the furnace reaches its explosive limit, ignition will inevitably lead to an explosion. Furthermore, the carbon monoxide produced during a severe gas leak can cause poisoning to nearby personnel. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a gas pipeline leakage detection device for industrial furnaces and kilns. This device can detect gas pipeline solenoid valve jamming and leakage, so as to repair the faulty valve in time, ensure the safety of the equipment, and avoid the harmful events caused by gas leakage due to valve jamming.

[0004] The technical solution of this utility model is implemented as follows: A gas pipeline leakage detection device for industrial furnaces and kilns includes a gas flow meter installed after the main solenoid valve of the main gas pipeline for detecting gas flow, various gas branch pipelines connected to the gas flow meter, manual valves for each gas branch pipeline installed on each gas branch pipeline, and solenoid valves for each gas branch pipeline connected to the manual valves. An isolation transmitter for converting gas flow signals is connected to the signal output terminal of the gas flow meter. The isolation transmitter receives the output signal from the gas flow meter and electrically isolates and transmits the signal. A PLC communication module for displaying gas flow signals is connected to the signal output terminal of the isolation transmitter. The PLC communication module receives the instantaneous gas flow signal output by the gas flow meter through the isolation transmitter and converts it into a digital signal. An industrial control computer is connected to the communication interface of the PLC communication module.

[0005] When the operator closes the main solenoid valve of the gas pipeline, observe whether the gas flow changes. If the gas flow continues to change, it is determined that the main solenoid valve of the gas pipeline is stuck and leaking. When the operator opens the main solenoid valve of the gas pipeline and simultaneously closes the solenoid valve of the gas branch pipeline, observe whether the gas flow changes. If the gas flow continues to change, it is determined that the solenoid valve of the gas branch pipeline is stuck and leaking. To determine the specific location of the gas branch pipeline solenoid valve, the manual valves upstream of each gas branch pipeline solenoid valve must be closed one by one. When the gas flow changes to 0, it is determined that the gas branch pipeline solenoid valve downstream of that manual valve is stuck and leaking.

[0006] The gas flow meter includes a rotary flow meter and an intelligent flow totalizer, which can detect instantaneous gas flow and has a signal output function. The gas flow meter is connected to an industrial control computer through a PLC communication module, and displays the instantaneous gas flow signal on the engineering screen of the industrial control computer.

[0007] The positive effects of this invention are as follows: Compared with the original device, it can quickly detect solenoid valve jamming, thereby identifying potential explosion risks in industrial furnaces. Each inspection can directly determine the specific solenoid valve jamming or leakage fault, eliminating safety risks and ensuring production safety. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structural principle of this utility model.

[0009] The following are labeled in the diagram: 1. Main gas pipeline for industrial furnace; 2. Main solenoid valve for gas pipeline; 3. Gas flow meter; 4. Manual valve for gas branch pipeline; 5. Solenoid valve for gas branch pipeline; 6. Gas branch pipeline for industrial furnace; 7. Isolation transmitter; 8. PLC communication module; 9. Industrial control computer. Detailed Implementation

[0010] like Figure 1 As shown, an industrial furnace gas pipeline leakage detection device includes a gas flow detection system, a gas flow signal conversion system, and a gas flow signal display system.

[0011] The gas flow detection system includes a gas flow meter, which is installed downstream of the main gas pipeline valve. It primarily uses a rotary valve flow meter, offering high measurement accuracy and the ability to detect even small flow rates. The rotary valve flow meter also includes an intelligent flow meter integrator with signal output functionality, capable of transmitting instantaneous flow signals to an isolation transmitter via its output terminals.

[0012] The gas flow signal display system includes an isolation transmitter and a PLC communication module. The isolation transmitter provides electrical isolation and transmission of the signal, converting the field signal into a receiving signal for the PLC communication module. It also suppresses interference signals, protecting the safety and data stability of field and backend equipment. The PLC communication module includes a CPU and a signal input module. It receives the instantaneous gas flow signal through the isolation transmitter, converts it into a digital signal, and transmits it to the industrial control computer via a communication interface. The gas flow signal display system includes an industrial control computer and an engineering screen, displaying the instantaneous gas flow signal transmitted from the PLC communication module intuitively on the engineering screen.

[0013] The specific structure is shown in the figure. An industrial furnace gas pipeline leakage detection device includes a gas flow meter 3 installed after the main solenoid valve 2 of the main gas pipeline 1 for gas flow detection; various gas branch pipelines 6 connected to the gas flow meter 3; manual valves 4 installed on each gas branch pipeline 6; and solenoid valves 5 connected to the manual valves 4. An isolation transmitter 7 for gas flow signal conversion is connected to the signal output terminal of the gas flow meter 3. The isolation transmitter 7 receives the output signal from the gas flow meter 3 and electrically isolates and transmits the signal. A PLC communication module 8 for displaying the gas flow signal is connected to the signal output terminal of the isolation transmitter 7. The PLC communication module 8 receives the instantaneous gas flow signal output by the gas flow meter 3 through the isolation transmitter 7 and converts it into a digital signal. An industrial control computer 9 is connected to the communication interface of the PLC communication module 8.

[0014] When the operator closes the main solenoid valve 2 of the gas pipeline, observe whether the gas flow changes. If the gas flow continues to change, it is determined that the main solenoid valve 2 of the gas pipeline is stuck and leaking. When the operator opens the main solenoid valve 2 of the gas pipeline and simultaneously closes the solenoid valve 5 of the gas branch pipeline, observe whether the gas flow changes. If the gas flow continues to change, it is determined that the solenoid valve 5 of the gas branch pipeline is stuck and leaking. To determine the specific location of the solenoid valve 5 of the gas branch pipeline, the manual valve 4 upstream of the solenoid valve must be closed one by one. When the gas flow changes to 0, it is determined that the solenoid valve 5 of the gas branch pipeline downstream of the manual valve 4 is stuck and leaking.

[0015] The gas flow meter 3 includes a rotary flow meter and an intelligent flow totalizer, which can detect instantaneous gas flow and has a signal output function. The gas flow meter 3 is connected to the industrial control computer 9 through the PLC communication module 8, and displays the instantaneous gas flow signal on the engineering screen of the industrial control computer 9.

[0016] The method for detecting gas leaks in industrial furnaces is as follows: Operators can monitor the instantaneous gas flow rate in the industrial furnace gas pipeline online through the engineering screen on the industrial control computer (9). The status of the main solenoid valve 2 and the branch solenoid valve 5 of the gas pipeline determines whether a gas leak has occurred. The specific method is as follows: When the operator closes the main solenoid valve 2 of the gas pipeline, observe whether the gas flow rate changes. If the gas flow rate continues to change, it is determined that the main solenoid valve 2 of the gas pipeline is stuck and leaking.

[0017] When the operator opens the main gas pipeline solenoid valve 2 and simultaneously closes the gas branch pipeline solenoid valve 5, they should observe whether the gas flow rate changes. If a continuous change in gas flow rate is observed, it is determined that the gas branch pipeline solenoid valve 5 is stuck and leaking. To pinpoint the exact location of the gas branch pipeline solenoid valve 5, the manual valve 4 upstream of each solenoid valve must be closed one by one. When the gas flow rate changes to 0, it is determined that the gas branch pipeline solenoid valve 5 downstream of that manual valve 4 is stuck and leaking.

Claims

1. A gas pipeline leakage detection device for industrial furnaces and kilns, comprising a gas flow meter (3) for detecting gas flow after a main gas pipeline solenoid valve (2) installed on the main gas pipeline (1) of the industrial furnace, various gas branch pipelines (6) connected to the gas flow meter (3), manual valves (4) for gas branch pipelines installed on each gas branch pipeline (6), and solenoid valves (5) for gas branch pipelines connected to the manual valves (4), characterized in that: An isolation transmitter (7) for converting gas flow signals is connected to the signal output terminal of the gas flow meter (3). The isolation transmitter (7) receives the output signal from the gas flow meter (3) and performs electrical isolation and transmission of the signal. A PLC communication module (8) for displaying gas flow signals is connected to the signal output terminal of the isolation transmitter (7). The PLC communication module (8) receives the instantaneous gas flow signal output by the gas flow meter (3) through the isolation transmitter (7) and converts it into a digital signal. An industrial control computer (9) is connected to the communication interface of the PLC communication module (8).

2. The industrial furnace gas pipeline leakage detection device according to claim 1, characterized in that: When the operator closes the main solenoid valve (2) of the gas pipeline, observe whether the gas flow changes. If the gas flow continues to change, it is determined that the main solenoid valve (2) of the gas pipeline is stuck and leaking. When the operator opens the main solenoid valve (2) of the gas pipeline and closes the solenoid valve (5) of the gas branch pipeline at the same time, observe whether the gas flow changes. If the gas flow continues to change, it is determined that the solenoid valve (5) of the gas branch pipeline is stuck and leaking. When determining the specific location of the solenoid valve (5) of the gas branch pipeline, the manual valve (4) at the front end of the solenoid valve (5) of the gas branch pipeline needs to be closed one by one. When the gas flow changes to 0, it is determined that the solenoid valve (5) of the gas branch pipeline at the rear end of the manual valve (4) is stuck and leaking.

3. The industrial furnace gas pipeline leakage detection device according to claim 1, characterized in that: The gas flow meter (3) includes a rotary flow meter and an intelligent flow totalizer, which can detect the instantaneous gas flow and has a signal output function. The gas flow meter (3) is connected to the industrial control computer (9) through the PLC communication module (8) and displays the instantaneous gas flow signal on the engineering screen of the industrial control computer (9).

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