【 Weak current College 】 fire water system design in a number of problems---Power By 【 China power house network 】

Abstract: as more and more attention to fire problems, building drainage fire problems also affected by the colleagues of concern, the fire protection design specifications as designers must comply with the legal provisions, also allow designers to start more learning and thinking, I recently in NetEase drainage online fire plate served as moderator, and peer exchange, users found a lot of code for the end of the above, it is difficult to reach through discussions and clear conclusions, some problems out and discussion with colleagues, want to be able to communicate with members receive all comments and corrections, at the same time can cause specification preparation group experts, preparation of specifications in the future to modify these issues into consideration.
Its a: buildings》 in roof fire water tank Setup problems with fire problems more and more attention to sewerage in fire problems also affected by the colleagues of concern, the fire protection design specifications as designers must comply with the legal provisions, also allow designers to start more learning and thinking, I recently in NetEase drainage online fire plate served as moderator, and peer exchange, users found a lot of code for the end of the above, it is difficult to reach through discussions and clear conclusions, some problems out and discussion with colleagues, want to be able to communicate with members receive all comments and corrections, at the same time can cause specification preparation group experts, preparation of specifications in the future to modify these issues into consideration. In my opinion, the norms of which has a balanced understanding of the problem, too thick to specific operational execution, is too thin and inevitably some places to look after all aspects, so that the specific difficulties of design difficult to really implement it. Because the specification is used to directly embodied in the design, so it should be actionable, should be very clear, if there is not clear, such as the specification revision parties the controversial, it is recommended that you should upgrade to the next level and make a layer above, should be guaranteed and not been spoken, a vague lists so that most designers and audit plans, fire review officer and the staff are difficult to grasp, the parties understood the ambiguity, the first stage of the programme designers cannot grasp, for example, today I think so, and do a review of the programme, the fire officer considers it possible that after two days of construction drawings ready, review officers for individuals, on the understanding of a particular specification, drawings of work changes, and such a thing occurs frequently, causing a lot of waste that is detrimental to our work, creating a contradiction between the parties, but also to provide an opportunity for some corruption links.　　Violation of norms in the first place. Now intend to do some of the issues in the design of out, analysis and discussion with you.　　Limited to length, intends to tap several articles dealt, this paragraph by paragraph discussion only, set on the roof: the architectural design fire protection standard "GBJ16-87 (2001 Edition), hereinafter referred to as buildings》" section 8.6.3 bar is set high pressure water supply system of the building, such as to guarantee the most negative point fire hydrants and fire sprinkler equipment of water and water pressure, you can not fire water tank. To set up a temporary high pressure water supply system of the building, should fire water tank or air pressure tank, water tower, should meet the following requirements: 1 should the highest parts of buildings set gravity self-leveling fire water tank; second, indoor fire water tank (including air pressure tank and water tower, area water supply system of partition water tanks), should be stored 10min fire water.　　When indoor fire water consumption does not exceed 25 L/s, the calculation of fire water tank storage capacity exceeds 12m3, can still be used indoor fire 12m3; when the consumption of more than 25 L/s, the calculation of fire water tank storage capacity exceeds 18m3, still use 18m3. 1. in the above two in first on a temporary high pressure and high pressure definition, temporary high pressure as we all know, and often high-voltage specification in the provisions of the interpretation of "the ponds or regional high pressure water supply system in the area of high pressure in the water supply system, since there is no clear definition, so in actual design difficult to grasp, first of all say that the scope of the regional concept, difficult to grasp how large is the zone that is building a community or several community or is it a piece of factory area, are not known, so in normal design only ponds can be unanimously recognized, and the regional high pressure understanding many objections, stolen that actually meets the second load, if fire protection equipment, an independent two-channel water supply, or all the way to the water but with indoor outdoor fire fire water tank of water, usually have a special duty fire pump or fire control centre, which can be thought of as high pressure systems, because even if the fire as the focus of its reliability, also has a" degree ", because any security insurance are not absolute, as even the specification defines a constant voltage ponds, maintenance and cleaning time.
These are my humble opinion, did not think that necessarily correct, but still think that if you cannot clear it is better not to write out, at least not everyone in the above fees do think, still can not find a unified understanding. 2. What is the "indoor fire water tank (including air pressure tank and water tower, area water supply system of partition water tanks), should be stored 10min fire water", here 10 minutes fire water we think we should include spray and other fire-fighting equipment of water consumption, however, in accordance with the automatic sprinkler system design code GB50084-2005 (hereinafter referred to as the "spray control on)" temporary-use feedwater 10.3.1 system of automatic sprinkler system, should be set to high fire water tank, the water should be in line with existing provisions of the relevant national standards. Fire cistern, should satisfy the system is the most disadvantageous point minimum working pressure sprayer and spray intensity "it says" system most unfavourable point minimum working pressure sprayer and spray intensity "really refers to the most negative point a sprinkler water or with the" most disadvantageous in 10.3.2 at 4 nozzle in minimum working pressure of the water ", or 10min most unfavourable Department inside the protected area of 10-minute allowance, thisProblems both in buildings》 or the spray control law or forthcoming buildings》 sent manuscripts there are no clear statement.　　For example, if a building with underground parking of multi-storey building, a spray system, using the spray zhongwei ⅱ, spray of water the strength calculation according to the most negative point of protection area to calculate, if water is 30l/s, depending on the density of nozzles and the selection of pipe diameter size some differences, if water hydrant system is 10ls/, if the entire protection area spraying 30l/s flow calculation for a 10-minute water is 18 cubic, because "when the indoor fire water consumption exceeds 25 L/s, the calculation of fire water tank storage capacity exceeds 18m3, still use 18m3" does not need to evaluate other water tank can select 18m3, if in accordance with the "most adverse Office 4 nozzle in minimum working pressure of the water" calculation then 10min 4 only water nozzle should be around 5l/s, i.e. water tank need fire hydrant water 10 × 10 × 60 = 6 m3 and plus 5 × 10 × 60 = 3m3 water to 9 m3, and previously described 18m3 great differences. We usually think of design as rarely in the tank to be able to meet the requirements for head of spraying, so is the need to set up charging system, so the pot ten minutes in the water, the water tank is not taken into account, but we note that the regulation on article 10.3.2 Jet said "no high fire water tank of the building, the system should be set pressure water supply equipment. Pressure water supply equipment for effective water volume, press the system most adverse Office 4 nozzle in minimum working pressure of water determined. 10min　　"So where it is not strictly understood fire water tank, pressure water supply equipment for effective water volume, press the system most adverse Office 4 nozzle in minimum working pressure of water use, however 10min even with a pressure water supply device, when the tank is also should consider sprinkling water, if we are to standardize literally understood, or need.　　Have to ask, this is the specification of intent? if not, the specifications in this section on the vulnerabilities of the statement. There are also questions whether the new old buildings》 had this puzzling that indoor fire water tank calculation of volume should be equivalent to the effective volume of air pressure tank and, if 18 cubic meters, 18 cubic fire water tank did not seem wrong, but 18 cubic effective volume of pressure tank is not acceptable, as we still ask for the original says what it means? current design and illustration work we all understand, therefore, often controversial, but who also persuade someone, ask the expert, is also different, therefore the above view.