Key word: The fire water tank makes up the water water level signal
1 question proposed

In order to guarantee in the civil construction the life tap water water quality, GBS0015 - 2,003 ((the construction gives the water draining water design standard "the 3.2.8th stipulation: "The life tap water pond (box) should (box) separate the establishment with other water useds basin". Therefore, in the construction for the water design in, at present no longer will live the tap water and the fire water used merge stores up as well as sets up comes in handy the water tank, but will be alone stores up the fire water used, uses the special-purpose fire water tank, perhaps will store up the fire water used and the life 杂用 water merge in lives the mixed water used and the fire water used comes in handy in the water tank, will cause the life tap water and the fire water used water tank establishment conforms to the standard related requirement, will guarantee the life tap water the water quality. Because uses divides the nature water supply and stores the water way the change, causes the fire water used water tank to make up Shui Yuqi to pump the water level, to report to the police the water level aspect request to have differently. Must guarantee in the fire water tank the fire prevention many and is not used with the water volume to the stipulation request, must take the corresponding measure, reasonably reliably establishes the fire water tank to make up the water and the water level surveillance alarm. This article according to fire Chu Shui the related request, proposed several views for design when refers.

2 different combinations establishments discussion

(1 in) when constructs establishes lives the mixed water used and the fire water used comes in handy the water tank, also the water tank enters the water when provides by the special-purpose life mixed water used water pump, its storage fire water used because is equipped with the technical measure which uses (is not lived mixed water used to open pumps signal and lives mixed water used water leakage rainbow to attract elbow piece) as well as lives the mixed water used water pump unceasingly to make up the water, enable the fire prevention to have the reliable guarantee with the water volume. Therefore the water tank makes up the water pump to open stops the signal to be possible according to live the mixed water used height water level establishment. At the same time, suitably in makes up the water pump to open pumps the water line and lives the mixed water used rainbow to attract the elbow piece 孔口 under to establish fire Chu Shui the water level surveillance alarm (position to be possible to act according to fire waterretaining capacity and water tank form determination), thus guarantees the fire water used the waterretaining capacity and stores the water not to use. See Figure 1,

Chart 1 lives the mixed water used and the fire water used comes in handy the water tank signal water level relations.

(2) when in the building fire water used selects alone stores up (namely special-purpose fire water tank) the method, also uses when the special-purpose fire water tank makes up the water pump, is guarantees the fire water used the waterretaining capacity, it makes up the water pump to open pumps the water level to be supposed to be in the water tank the fire waterretaining capacity 低水位线, and reports to the police on the water line in the fire Chu Shui surveillance to establish. But makes up the water pump to stop pumps the water level establishment, then because in water tank Chu Shui is generally not used in the non- fire situation, only is few evaporates with 漏损, must relatively makes up the water volume to be also smaller. Therefore does not enter in the consideration the water water surface undulation influence in the situation, the suitable enhancement certainly highly for stops pumps the water level then (because evaporates with 漏损 water volume to lose slightly, generally as for does not affect water pump hour to open number of times). The water tank overflow alarm and the water tank overflow position may according to the standard request establishment, and (area) makes up the water pump water line according to the fire waterretaining capacity and the water tank form in the fire water tank on the underneath certain distance to establish. See Figure 2, for fire special-purpose water tank signal water level relations.

(3) when in the building fire water used selects alone stores up (namely special-purpose fire water tank) the method, when also in the building is equipped with the life tap water water tank, may establish the small fire prevention special-purpose to make up the water pump to pump water from the life tap water water tank to the special-purpose fire water tank makes up the water, but should increase the measure which guards against cuts off the water supply. Its water level establishment with (2) the spot, the fire special-purpose water tank signal water level relations see Figure 2.

(4) when in the building fire water used selects alone stores up (namely special-purpose fire water tank) the method, when also in the building has not lived the tap water water tank, gives by the frequency conversion feedwater equipment when makes up the water, should act according to the standard the request in on the fire water tank water inlet pipe to establish if the caliber same motorized valve, pumps by the motorized valve coordination frequency conversion for the fire special-purpose water tank makes up the water, in the fire water tank height water level signal namely opens the signal for the water inlet pipe motorized valve.

Chart 2 fire special-purpose water tank signal water level relations

(5) the building fire prevention when uses the fire special-purpose water tank for the aqueous system, is guarantees in the water tank the fire waterretaining capacity, the water monitor aspect demand and makes up the water pump movement aspect the request (number of times and water surface undulation influence which opens including hour in stops pumps). The fire special-purpose water tank waterretaining capacity suitably slightly has the increase compared to standard request each kind of fire prevention with the water volume, remains has the certain adjustment cushion volume, causes to make up the water pump to be able the normal operation.

(6) in the fire water tank overflow water level alarm determination suitably refers to GB50015 - 2,003 "Construction for Water Draining water Design Standard" the 3.7.7th article to explain that, "... ... Reports to the police between the water level and the maximum high-water and the overflow water level relations: Reports to the police the water level to be supposed to outdo about maximum high-water 50 mm, the small water tank may small somewhat, the big water tank be possible to take big somewhat. Reports to the police the water level to be apart from overflow water level generally approximately 50mm, like water inlet pipe diameter big, enters the water current capacity to be big, after reports to the police when needs the manual closure or the electrically operated closure, should give the urgent closure the time, generally reports to the police the water level is apart from overflow water level 250 - 300 mm "the request, establishes between the maximum high-water and the overflow water level, also according to water tank volume size, water inlet pipe caliber, water inlet pipe current capacity, inlet valve gate closure way and so on each kind of factor determination. At the same time, maximum high-water with 溢流�?the spacing also should be higher than 50mm which the life tap water box requests highly to request, satisfies the overflow water level alarm establishment distance the request.

3 concluding remark

In the actual engineering design, should and makes up the water way according to the fire water tank establishment differently, lives the mixed water used and the fire water used comes in handy the water tank or the fire special-purpose water tank should correctly use 同启 does not stop pumps, the surveillance and the overflow and so on reports to the police the water level, avoids living the tap water water quality two pollution and the unreasonable system establishment, guarantees the life tap water water quality and the fire prevention system security, is reliable.

Reference:

[ 1> GB 50,015 - 2,003, the construction gives the water draining water design standard.

[ 2> GBJ 16 - 87 (in 2001 version), architectural design fire protection standard.

[ The 3> compilation group. nation civil construction engineering design technology measure (gives water draining water), Beijing: Chinese plan publishing house, 2003.