Automatic isolation system for mine gas leakage

Abstract

The invention belongs to the technical field of mine safety, and relates to a mine gas leakage automatic isolation system which comprises a data processing unit, the data processing unit is connected with a gas sensor, an automatic control system is arranged on one side of the gas sensor, an isolation device is arranged on one side of the automatic control system, and an alarm system is arranged on one side of the isolation device. And the data processing unit is connected with a voice broadcast system. The device is complete in structure and complete in function, harmful gas is detected, isolated and treated in real time through the automation technology, effective management of the harmful gas is achieved, the safety of mine operation is improved, and a guarantee is provided for safe construction.

Description

Technical Field

[0001] The invention belongs to the technical field of mine safety, and in particular relates to an automatic isolation system for mine gas leakage. Background Art

[0002] In the mine working environment, there is often accumulation and leakage of various harmful gases such as carbon monoxide, methane, and hydrogen sulfide. Once these gases reach a certain concentration, they will seriously threaten the lives of miners. If not handled in time, they may cause fires, explosions or poisoning accidents. Mine safety protection equipment is a safety device developed to deal with the common gas leakage risks in mines. It usually consists of a measurement system and personal protective equipment. Once the concentration exceeds the standard, an alarm will be issued. Personal protective equipment includes dust masks, protective clothing and explosion-proof helmets to protect the physical safety of miners during operations.

[0003] Existing mine safety protection equipment mostly relies on manual monitoring and manual operation, with slow response speed, making it difficult to quickly take effective isolation measures in an emergency, posing a great safety hazard. Therefore, there is an urgent need for a system that can automatically detect gas concentration and quickly take isolation measures when harmful gas leaks are detected, in order to reduce accident risks and ensure the safety of the mine working environment. Summary of the invention

[0004] The purpose of the present invention is to provide an automatic isolation system for mine gas leakage, which integrates a gas sensor, a data processing unit, an automatic control system, an isolation device and a ventilation system. The system monitors the gas concentration through a highly sensitive sensor and automatically adjusts the isolation and ventilation devices to achieve effective management of harmful gases, solving the problem of the slow response speed of the prior art system and difficulty in quickly taking effective isolation measures in an emergency.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is that the present invention provides an automatic isolation system for mine gas leakage, including a data processing unit, the data processing unit is connected to a gas sensor, an automatic control system is arranged on one side of the gas sensor, an isolation device is arranged on one side of the automatic control system, an alarm system is arranged on one side of the isolation device, and the data processing unit is connected to a voice broadcast system.

[0006] Specifically, a power supply unit is arranged at the rear side of the data processing unit, a PSU is arranged on the power supply unit, and a VRM is arranged on the data processing unit.

[0007] Specifically, the data processing unit is connected to the gas sensor through a shielded cable. An ADC is provided on one side of the gas sensor. The gas sensor generates an analog signal, which is converted into a digital signal by the ADC and transmitted to the input interface of the data processing unit. The data communication protocol used is the I2C protocol.

[0008] Specifically, the automatic control system includes a relay and a controller. The controller model is Siemens S7-1500, which is connected to the relay through an I / O port, and the relay is connected to the ventilation system through a wire.

[0009] Specifically, the data processing unit transmits information to the voice broadcast system through serial communication. The serial communication adopts RS-232 protocol. The information is sent in the form of frames. Each frame contains a start bit, data bits, parity bits and stop bits.

[0010] A method for using a mine gas leakage automatic isolation system comprises the following steps: 1) System inspection and maintenance: Conduct a comprehensive inspection of the system before use; 2) Parameter setting: set alarm threshold for the system; 3) Install sensors: Arrange gas sensors reasonably; 4) System test: simulate gas leakage incidents and conduct safety tests on the system; 5) System startup; 6) Real-time monitoring: After the system is started, it will monitor the data of each gas sensor in real time; 7) Data feedback: When the gas concentration in the mine exceeds the threshold, the data will be transmitted to the data processing unit through the gas sensor; 8) Trigger the alarm system: the alarm system sounds an alarm; 9) Issue evacuation instructions: The voice broadcast system issues emergency instruction reminders; 10) Ventilation system shut down: The system automatically closes the isolation device valve and shuts down the ventilation system; 11) Transmit information to the outside world; 12) Subsequent monitoring of gas concentration: After the evacuation of personnel is completed, the system continues to monitor.

[0011] Specifically, in step 7), the harmful gas is methane, and the threshold is specifically 0.5% to 1%.

[0012] Specifically, in step 10), the isolation device has an impact resistance of not less than 0.6 MPa and is capable of isolating fire.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are: The present invention has a complete structure and perfect functions. It detects, isolates and treats harmful gases in real time through automation technology, realizes effective management of harmful gases, improves the safety of mine operations, and provides a guarantee for safe construction. The present invention integrates gas sensors, data processing units, automatic control systems, isolation devices and ventilation systems. The system monitors gas concentrations through highly sensitive sensors and automatically adjusts isolation and ventilation devices to achieve effective management of harmful gases, solving the problem of the prior art system's slow response speed and difficulty in taking effective isolation measures quickly in an emergency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 A schematic diagram of the structure of an automatic isolation system for gas leakage in a mine provided by an embodiment; In the above figure, 1. data processing unit, 2. gas sensor, 3. automatic control system, 4. isolation device, 5. alarm system, 6. voice broadcast system, 7. shielded cable, 8. ventilation system, 9. serial communication. DETAILED DESCRIPTION

[0016] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0017] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0018] Embodiment 1, as Figure 1 As shown, an automatic isolation system for mine gas leakage includes a data processing unit 1, the data processing unit 1 is connected to a gas sensor 2, an automatic control system 3 is arranged on one side of the gas sensor 2, an isolation device 4 is arranged on one side of the automatic control system 3, an alarm system 5 is arranged on one side of the isolation device 4, and the data processing unit 1 is connected to a voice broadcast system 6.

[0019] The data processing unit 1 is connected to the gas sensor 2. The gas sensor 2 adopts advanced electrochemical sensors and semiconductor sensors with high sensitivity and high selectivity. The working range of the gas sensor 2 can cover multiple key areas of the mine, including the mining face, ventilation ducts and the depth of the mine, so as to facilitate the monitoring of various parts inside the mine. The data processing unit 1 processes the analog signal generated by the gas sensor 2, performs data analysis and judgment, and decides whether it is necessary to start the isolation and ventilation procedures. An automatic control system 3 is set on one side of the gas sensor 2. The automatic control system 2 includes a relay and a controller. The controller model is Siemens S7-1500. The controller is connected to the relay through the I / O port, and the signal lines of the remaining sensors and switches are connected to the terminals of the controller input module. The output end of the input module is connected to the I / O interface of the controller, and the relay is connected to the ventilation system 8 through a wire.

[0020] An isolation device 4 is provided on one side of the automatic control system 3, and an electric valve is provided inside the isolation device 4. When a gas leak occurs, the data processing unit 1 will promptly calculate the type and concentration of the gas leak, and control the opening and closing of the electric valve according to the concentration. If the concentration is large, the data processing unit 1 will promptly close the valve in the corresponding area to isolate the harmful gas. When the gas leaks, the isolation device 4 can quickly close the valve in the mine, thereby isolating the contaminated area from other safe areas. This isolation measure can effectively prevent the harmful gas from further spreading to other locations in the mine, reduce the impact on the overall environment of the mine, and thus reduce the danger. In addition, when the concentration of harmful gases is large, the automatic control system 3 will also control the ventilation system 8 to shut down. The ventilation system 8 includes a main fan, an auxiliary fan and an air duct system. The fan can be automatically started and stopped and speed-regulated according to actual needs, but if the concentration of harmful gases is small, the automatic control system 3 will also control the ventilation system 8 to increase the wind force, thereby accelerating the gas circulation.

[0021] An alarm system 5 is provided on one side of the isolation device 4. When the automatic control system 3 controls the ventilation system 8, the alarm system 5 will sound an alarm in time, thereby reminding the employees inside the mine to evacuate in time. The data processing unit 1 is connected to the voice broadcast system 6. The data processing unit 1 transmits information to the voice broadcast system 6 through serial communication. The data processing unit 1 converts the digital audio signal into a format supported by the voice broadcast system 6 through a converter or an interface module, and then directly transmits the digital audio data to the voice broadcast system 6 supporting digital input through the interface.

[0022] Embodiment 2, a method for using a mine gas leakage automatic isolation system as shown in Embodiment 1, comprises the following steps: 1) System inspection and maintenance: Before the mine gas leakage automatic isolation system is officially put into use, the system installation work must be completed first. After the installation is completed, the operator should conduct a comprehensive inspection of the system to ensure that all equipment connections are correct and all components are working properly; 2) Parameter setting: Set the alarm threshold for the system. When setting, you need to refer to the ventilation conditions of the mine to ensure that the alarm and isolation mechanism can be activated in time when the gas concentration reaches a dangerous level. At the same time, the system configuration should be consistent with the mine's emergency response procedures to ensure that it can respond quickly and effectively to gas leak incidents in actual situations; 3) Install sensors: Arrange gas sensors 2 according to possible leakage locations in the mine. Gas sensors 2 should be placed on the main gas flow paths in the mine, such as the air inlet, return air outlet, and the bottom of the mine to ensure comprehensive monitoring of gas concentration; 4) System test: By simulating gas leakage, the system's response capability is tested, including gas concentration detection, alarm triggering, automatic isolation and information transmission. During the test, the system's performance indicators should be recorded to ensure that they meet the design requirements; 5) System startup: After the system passes the test, the automatic isolation system can be officially started; 6) Real-time monitoring: After the monitoring system is started, the system will conduct real-time gas concentration monitoring and data analysis. The system will continuously monitor the data of various sensors in the mine and evaluate the risk of gas leakage through data analysis algorithms; 7) Data feedback: When the gas concentration in the mine exceeds the threshold, the data will be transmitted to the data processing unit 1 through the gas sensor. After receiving the information, the data processing unit 1 will analyze the data in time; 8) Triggering the alarm system: When the data processing unit 1 analyzes that the gas concentration exceeds the preset threshold, the data processing unit 1 will immediately transmit the information to the automatic control system 2, thereby triggering an alarm; 9) Issue evacuation instructions: When the concentration of harmful gases is too high, the data processing unit 1 will issue a warning to the personnel in the mine through the voice broadcast system 6. At the same time, the operator should quickly confirm the authenticity of the alarm and understand the specific location and type of gas leaked through the detailed information provided by the system; 10) Ventilation system shut down: the system automatically closes the valve of the isolation device 4 and shuts down the ventilation system 8; 11) Transmit information to the outside world; 12) Follow-up monitoring of gas concentration: After the isolation and evacuation work is completed, the system should continue to monitor the changes in gas concentration to evaluate the effectiveness of the isolation measures. If the gas concentration continues to be higher than the safe level, the system will automatically adjust the isolation strategy, increase the isolation area or take other measures.

[0023] Step 7) The threshold of the harmful gas, if the volume ratio of methane reaches 1%, a low concentration alarm will be triggered, and if the volume ratio reaches 2%, a high concentration alarm may be triggered. In general, it can be set at 0.5% to 1% as the alarm threshold.

[0024] Step 10) The isolation device has an impact resistance of not less than 0.6 MPa and is capable of isolating fire.

[0025] The present invention provides an automatic isolation system for gas leakage in a mine, which monitors the gas concentration in the mine in real time through a gas sensor 2 and connects with a data processing unit 1, thereby preventing and treating gas leakage in the mine in real time. The system greatly improves mine safety and reduces the risk of accidents caused by gas leakage.

[0026] The contents not described in detail in this specification belong to the prior art known to professionals in this field.

[0027] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A mine gas leakage automatic isolation system, characterized in that: It comprises a data processing unit, which is connected to a gas sensor. An automatic control system is arranged on one side of the gas sensor, an isolation device is arranged on one side of the automatic control system, an alarm system is arranged on one side of the isolation device, and the data processing unit is connected to a voice broadcast system.

2. The automatic isolation system for mine gas leakage according to claim 1 is characterized in that: A power supply unit is arranged at the rear side of the data processing unit, a PSU is arranged on the power supply unit, and a VRM is arranged on the data processing unit.

3. The automatic isolation system for mine gas leakage according to claim 1 is characterized in that: The data processing unit is connected to the gas sensor via a shielded cable. An ADC is provided on one side of the gas sensor. The gas sensor generates an analog signal, which is converted into a digital signal by the ADC and transmitted to the input interface of the data processing unit. The data communication protocol used is the I2C protocol.

4. The automatic isolation system for mine gas leakage according to claim 1 is characterized in that: The automatic control system comprises a relay and a controller. The controller model is Siemens S7-1500, which is connected to the relay through an I / O port, and the relay is connected to the ventilation system through a wire.

5. The automatic isolation system for mine gas leakage according to claim 1 is characterized in that: The data processing unit transmits information to the voice broadcast system through serial communication. The protocol adopted by the serial communication is RS-232. The information is sent in the form of frames, and each frame contains a start bit, data bits, parity bits, and a stop bit.

6. A method for using an ultrasound-guided puncture stent according to any one of claims 1 to 5, characterized in that: The following steps are involved: 1) System inspection and maintenance: Conduct a comprehensive inspection of the system before use; 2) Parameter setting: set alarm threshold for the system; 3) Install sensors: Arrange gas sensors reasonably; 4) System test: simulate gas leakage incidents and conduct safety tests on the system; 5) System startup; 6) Real-time monitoring: After the system is started, it will monitor the data of each gas sensor in real time; 7) Data feedback: When the gas concentration in the mine exceeds the threshold, the data will be transmitted to the data processing unit through the gas sensor; 8) Trigger the alarm system: the alarm system sounds an alarm; 9) Issue evacuation instructions: The voice broadcast system issues emergency instruction reminders; 10) Ventilation system shut down: The system automatically closes the isolation device valve and shuts down the ventilation system; 11) Transmit information to the outside world; 12) Subsequent monitoring of gas concentration: After the evacuation of personnel is completed, the system continues to monitor.

7. The method for using the automatic isolation system for mine gas leakage according to claim 7, characterized in that: Step 7) The harmful gas is methane, and the threshold value is specifically 0.5% to 1%.

8. The method for using the automatic isolation system for mine gas leakage according to claim 7, characterized in that: Step 10) The isolation device has an impact resistance of not less than 0.6 MPa and is capable of isolating fire.

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