Definition of fire hydrant box
The fire hydrant box is fixedly installed on the fire water supply pipeline in the building. It is composed of the box door, the box body, the indoor fire hydrant, the fire interface, the fire hose, the fire water gun, the fire hose reel and electrical equipment, and other fire equipment. , fire extinguishing, control, and alarm functions of the box-type fire-fighting device.
Classification of fire hydrant boxes
1.The fire hydrant box is divided into:
a) Hanging type, no code is marked;
b) Coil type, code P;
c) roll type, code J;
d) Bracket type, code T.
2. Fire hydrant boxes are divided into:
a) Single-configuration type, no code is marked;
b) Double configuration, code-named S.
Note: The double-configuration fire hydrant box can be equipped with 2 single-valve indoor fire hydrants or 1 double-valve indoor fire hydrant.
3. Fire hydrant boxes are classified according to whether they are equipped with emergency lights:
a) It is not equipped with emergency lighting, and no code is marked;
b) Equipped with emergency lighting, code D.
4. Fire hydrant boxes are classified according to the door type:
a) Single door type, no code is marked;
b) Double door type, code 2.
5. Fire hydrant boxes are divided into:
a) Fire hose reel type is not configured, and no code is marked;
b) Equipped with fire hose reel type, code Z.
Arrangement of fire fighting equipment in the fire hydrant box
The fire hydrant box should be equipped with at least an indoor fire hydrant, fire interface, fire hose, fire water gun and electrical equipment, and other fire fighting equipment. The fire hydrant box with “Z” in the model should also be equipped with fire hose reels.
Appearance quality requirements for fire hydrant box
1. After the fire-fighting equipment configured in the fire hydrant box is assembled according to the regulations, there should be no uneven processing defects and bump marks on each surface.
2. The inner and outer surfaces of the box should be treated with anti-corrosion. The coating should be uniform, smooth, and smooth. There should be no defects such as flow marks, bubbles, and peeling.
3. Weld seams or solder joints should be flat and even, without welding defects such as burn-through and scars. The riveting should be tight and beautiful, and the rivet connection should be fastened without skew after riveting.
4. After the box door is closed in place, it should be flush with the surrounding frame surface, and the maximum tolerance for unevenness is 2.0mm.
5. The gap between the box door and the frame should be even and straight, and the maximum gap should not exceed 2.5mm.
6. The height of the parts on the front of the fire hydrant box protruding from the outer plane of the door should not be greater than 15.0mm; the height of the parts on the other sides protruding from the outer plane of the surface should not be greater than 10.0mm.
7. The deviation of the diagonal size of each plane on the outside of the box should not be greater than 3.0mm.
Material of fire hydrant box
1. The box body should be made of a thin steel plate with a thickness, of not less than 1.2mm, and other materials that meet the requirements of 5.4 can also be used.
2. The fire hydrant box door should be made of all steel, steel frame with glass, aluminum alloy frame with glass, or other materials.
3. The glass thickness of the glass box door should not be less than 4.0mm.
4. Fire hose hangers, brackets, and hose reels should be made of corrosion-resistant materials. If other materials are used, they should be treated with corrosion resistance.
5. The switch nozzles, reel shafts, elbows, and waterway system components of the fire hose reels arranged in the box shall be made of copper alloy materials, or other materials whose strength and corrosion resistance are not lower than the above-mentioned materials can also be used.
Box rigidity of fire hydrant box
1. On the side of the box where the fire hose reel is installed, under a torque of 150N·m, the maximum concave deformation should not exceed 2.0mm, and the fire hose reel fixing seat should not have visible deformation, open welding, and other defects.
2. For the hanging type and bracket type fire hydrant box, the surface of the fixed hose hanger and bracket should not exceed 2.0mm under the torque of 40N·m, and the fire hose hanger or bracket should not appear. Visible deformation, open welding, and other defects.
3. For the coiled fire hydrant box, on the surface of the fixed fire hose reel, under the torque of 20N·m, the maximum concave deformation should not exceed 2.0mm, and the fire hose reel should not have visible deformation, open welding, and other defects.
Fire hydrant box door
1. The fire hydrant box should be equipped with a door lock or a door-closing device.
2. For fire hydrant boxes with door locks, except for the glass doors and materials that can be crushed, a manual mechanism for emergency opening of the door should be installed to ensure flexible and reliable opening without a key.
3. The opening angle of the box door should not be less than 160°.
4. The pulling force for opening the door should not exceed 50N.
Fire hose placement
1. The fire hose should be placed in the fire hydrant box in the hanging type, coiled type, coiled type, or bracket type, and should not affect the reasonable placement and operation of other equipment.
2. The gap between the two adjacent comb teeth of the fire hose hanger of the mounted fire hydrant box should not be less than 20mm, and the cross arm of the hanger should not have visible deformation after the fire hose is hung; the fire hose of the coiled fire hydrant box There should be no jamming when the pan is taken out from the hanging arm or the fire hose is taken out of the pan; the fire hose bracket of the bracket type fire hydrant box should be flexible to rotate, and the fire hose should be pulled out from the bracket without jamming.
Connection performance of fire hose
1. The connection between the fire hose and the interface should be firm and reliable, and there should be no detachment and leakage under the water pressure of 0.8MPa.
2. After the indoor fire hydrant and the fire hose, and between the fire hose and the fire nozzle are connected through the interface, under the water pressure of 0.8MPa, there should be no leakage at each connection part.
Fire Nozzle jet performance
The flow rate of the fire water nozzle should not be less than 5L/s, and its full water column should not be less than 13m.
The performance and size of the fire-fighting equipment in the fire hydrant box
Indoor Fire Hydrant
1. Sealing performance
Carry out the sealing performance test, each sealing part of the indoor fire hydrant is under a water pressure of 1.6MPa, keep the pressure for 2 minutes, there should be no leakage.
2. Water pressure strength
Carry out the hydraulic strength test, the valve body and valve cover of the indoor fire hydrant are kept under the water pressure of 2.4MPa for 2 minutes, and there should be no cracks and leakage.
Fire Interface
1. Sealing performance
Carry out the sealing performance test, and the sealing parts of the fire-fighting interface shall be kept under the water pressure of 1.6MPa for 2 minutes, and there should be no leakage.
2. Water pressure strength
Carry out the hydraulic strength test, the fire-fighting interface is under the water pressure of 2.4MPa, keep the pressure for 2min, there should be no rupture and leakage.
3. Drop resistance of hose interface
The hose connection should be free to fall 5 times from a height of 1.50m, and it should be undamaged and can operate normally.
Fire Hose
1. Length
The length of the fire hose arranged in the fire hydrant box should be 20m or 25m.
2. Sealing performance
Carry out the sealing performance test, the fire hose should be kept under 0.8MPa water pressure for 5 minutes, and there should be no leakage in the entire length of the fire hose.
3. Pressure resistance
Carry out the pressure resistance test, the fire hose should be kept under 1.2MPa water pressure for 5 minutes, and there should be no leakage. Under the water pressure of 2.4MPa, keep the pressure for 5 minutes, and it should not explode.
4. Reverse side question
Under the action of water pressure, the fire hose should not twist counterclockwise when viewed along the direction of water flow.
Fire Nozzle
1. Sealing performance
Carry out the sealing performance test, the gun body and each sealing part should have no leakage.
2. Water pressure resistance
Carry out the hydraulic strength test, and the water gun should not have cracks, breaks, or residual deformation affecting normal use.
Fire Hose Reel
1. Operation performance
The rocker arm should be able to swing horizontally from the box to the outside, the swing angle should not be less than 90°, there should be no jamming and looseness when swinging, and the force driving the swing should not be greater than 50N. The starting torque for fire hose reel rotation should not be greater than 20N·m.
2. Connection performance
Carry out the connection performance test. The connection between the reel shaft and the elbow of the fire hose reel, the inlet and outlet of the hose and the hose reel, the hose and the water inlet control valve, and the hose and the spray gun should be firm and reliable. There should be no detachment or leakage. Under the water pressure of 1.2MPa, the parts should not be deformed or damaged to affect normal use.
3. Water pressure strength of water inlet control valve
The water inlet control valve is kept under 2.4MPa water pressure for 2 minutes, and the valve body should not be cracked or leaked.
4. Impact resistance
The fire hose reel should not be deformed to affect normal use; there should be no leakage at each connection part under 0.8MPa water pressure.
5. Load performance
The fire hose reel should not be deformed to affect normal use; there should be no leakage at each connection part under 0.8MPa water pressure.
6. Hose performance
Under the pressure of 1.2MPa, the hose should not leak; under the pressure of 2.4MPa, the hose should not burst, and the expansion should be uniform without local protrusions.