In recent years, the national gas industry has been developing rapidly, and city gas such as liquefied petroleum gas, natural gas and coal gas has been widely used as a clean energy source for industrial, commercial and urban residential users. With the increase in the scale of production and consumption, the use of more places, the situation is also more and more complex, in the production, storage, transportation and other places in the process of using the fire, leakage and explosion and other accidents also occur from time to time. Ensure the normal operation of the combustible gas detection and alarm equipment, strengthen the maintenance and repair of the equipment, in order to enable the equipment to play a more powerful role in safeguarding the lives of the people and property safety.

Combustible gas detection alarm system maintenance procedures

Combustible gas detector equipment, modules

■ Maintenance methods:

1. the equipment and the base fall off or poor contact, should be re-tightened and installed.

2. poor contact between the bus and the base of the device, the bus should be re-crimped, multi-stranded wire should be tin-lined or crimped nose; 3. open circuit, grounding, or any other defects in the bus.

3. bus open, grounded or shorted, should find the line failure point, remove the line problem; 4.

4. the equipment itself should be damaged to replace the faulty equipment; 5. the combustible gas detector misplaced.

5. Combustible gas detector false fire alarm, should adjust the alarm threshold or replace the gas-sensitive components in accordance with the requirements of the product specification.

Main power supply

■ Maintenance methods:

1. the main power supply should be turned off when the utility power outage for 8 hours continuously, and then turn on the power when the utility power is back to normal.

2. Check whether the main power supply air switch is disconnected, to determine the power supply circuit is normal and then re-closed, such as closed unsuccessfully to replace the switch.

3. Poor contact of the main power line, you can re-crimp the power line; 4.

4. main power fuse or fuse blown, to determine the line is normal, replace the fuse or fuse to meet the requirements.

5. The main power supply equipment itself is damaged and should be replaced with the faulty equipment.

Backup power supply

■ Maintenance methods:

1. poor contact with the backup battery wiring, it is appropriate to use a soldering iron welding or special tools crimp backup power connecting line;

2. standby power fuse or fuse blown, to determine the line is normal, replace the fuse or fuse to meet the requirements; 3.

3. When the backup power supply voltage is insufficient, the power charging device should be checked, the fault should be replaced by the backup power supply; 4.

4. Re-measure the under-voltage battery after charging for 24 hours, and replace the battery if it is still insufficient.

Combustible gas detection alarm system maintenance procedures

Combustible gas detection alarm controller

■ Inspection requirements:

1. Monthly check controller indicator, display, audio devices, should be intact and effective; 2.

2. monthly check controller external lines should be no defects, terminals should be no loose, line marking terminal marking should be clear, the external interface contact is good; 3. quarterly check the controller's features and functions.

3. quarterly check whether the controller function is normal; 4. quarterly check whether the controller function is normal; 5. quarterly check whether the controller function is normal.

4. Quarterly with a multimeter to measure the controller's output voltage, should meet the requirements of the product manual.

Maintenance methods:

1. using cleaning tools to clean the controller terminals and cabinet (box) dust; 2.

2. For installation in the air humid places in the controller equipment, can be placed in the cabinet (box) desiccant; 3.

3. When the output voltage of the controller is less than the specified value, the circuit board should be replaced or the line should be adjusted.

4. Tighten the external terminals of the controller.

5. Batteries should be maintained in accordance with the requirements of the product specification.

Combustible gas detector, incomplete combustion detector, composite detector

■ Check requirements:

1. Quarterly check whether the detector working condition is normal.

2. Combustible gas detectors in residential buildings should be tested every three years in accordance with the relevant provisions of the CJJT 146 and record the test results, unqualified should be replaced; 3.

3. Combustible gas detectors in commercial and industrial premises should be tested annually in accordance with the relevant provisions of CJJT 146 and record the test results, and should be replaced if they are unqualified.

■ Maintenance methods:

1. re-tighten the connection of loose terminals, replace the screws with traces of corrosion, terminal gaskets and other wiring components, remove the corrosion of the wire ends, tin-lined and reconnected; ■ Maintenance methods.

2. When the alarm function does not meet the requirements, the alarm threshold should be adjusted or the gas-sensitive element should be replaced according to the requirements of the product specification, and then the sensor alarm threshold should be calibrated to the detector's factory-set value.

3. The combustible gas detector should be re-checked after one year of operation, and it can be used only after it is qualified, and the inspected equipment should be labeled with the marking and the date of inspection after each inspection.

4. The combustible gas detector should be avoided to be used in the process of renovation and in the environment containing silicon, so as to avoid poisoning of the detector and damaging the sensitive components.

Module

■ Inspection requirements:

Quarterly check whether the working status of the module type equipment is normal.

■ Maintenance method:

Re-tighten the connection of loose terminals, replace the screws, terminal spacers and other wiring components with traces of corrosion, remove the corroded wire ends, and reconnect them after tin-lining.

Battery

■ Inspection requirements:

1. The standby battery used in the combustible gas detection and alarm system should be maintenance-free lead-acid battery.

2. Monthly check the battery poles and terminals should be firmly connected.

3. Quarterly switching test of the main power supply for fire protection, record the continuous working time of the backup power under the standard load, and check whether the backup battery power status is normal.

■ Maintenance methods:

1. re-tighten the connection of loose terminals, replace the screws with traces of corrosion, terminal spacers and other wiring components, remove the corroded wire ends, tin-lined and reconnected; ■ Maintenance methods.

2. Replace the battery with abnormal power status.

3. Remove the yellowish-white paste that may appear around the battery poles.

4. Apply petroleum jelly or other protective agents to the battery terminals to prevent oxidation.

Emergency shut-off device

■ Inspection requirements:

1. Check the appearance of the emergency cut-off device every month, there should be no deformation or damage; and

2. Every six months manually, electrically open and close the emergency cut-off device 1 time, the function should be normal.

■ Maintenance methods:

1. using special cleaning tools to clean the emergency cut-off device; ■ Maintenance methods.

2. Emergency cut-off device deformation, damage or failure to replace the effect.

Combustible gas detection and alarm system end-of-life conditions

■ Combustible gas detectors in residential buildings have a service life of five years, and combustible gas detectors in commercial and industrial premises have a service life of three years, and should be scrapped if they exceed the service life.

■ Emergency shut-off devices have a service life of ten years, and should be scrapped after the service life.