【 Weak current College 】 fire hydrant button role

Indoor hydrant system is building the most basic fire-fighting equipment, its electronically controlled in part by fire hydrant button and fire control indoor linkage control devices. Early application of fire hydrant button in order to meet the rapid startup scene distance fire pump needs, features fixed and clear; as technology advances, hydrant button now has generally been developed by the standard, for encoding type set Kai pump, alarm, display several feedback functions in one. However, no matter how improved functional structure, fire hydrant button remains one of the most basic direct cycle pump tool.
1. the role of the fire button
Specification provides fire cycle pump (linkage) can be divided into two classes, which are fire hydrant button plays an irreplaceable role.
1.1 fire hydrant button direct cycle pump
The tall buildings design fire protection standard (hereinafter referred to as the "regulations"), the first 7.4.6.7 stipulates: "temporary high pressure water supply system in each hydrant Office should be located directly on the button to start the fire pump. Visible, the specification for the definition of a fire hydrant button is the scene of Kai pump button, this point in the civil construction electrical design code has also been stressed in the: "when a fire hydrant is equipped with a fire hydrant button should be sent to the fire hydrant control room and starting work signal fire pump"
Through the fire hydrant button directly Kai pump, fire hydrant button and fire pump between the hardware directly, so the start circuit is independent of the Elimination of the CCR cycle pump, you can set individually. The architectural design of the fire code (hereinafter buildings》) 8.6.2.9 stipulates: "senior industrial buildings and tanks cannot meet the most negative point fire hydrant water pressure requirements of other buildings, each hydrant is set at the start of the fire pumps directly. "This can be understood: as long as building (Group) are equipped with the fire pump, it must be set to direct Kai pump fire hydrant button. For example, on some level of multi-story building, in particular by the General composition of high-rise residential district, in most cases only set indoor hydrant system to meet regulatory requirements without having to set up automatic fire alarm and coordinated control system, at this point if the water does not meet the requirements, you must set the fire hydrant button to start the site quickly fire pump.
By eliminating the CCR control 1.2 cycle pump
The automatic fire alarm system design specifications "(hereinafter referred to as the" fire control "), section 5.3.2 stipulates:" the fire pump, smoke and exhaust blower control device when using the bus coding module control, you should also set the fire control rooms directly control the device manually. "Visible, by eliminating the CCR control cycle pump manual, automatic second way, the former is when eliminating control room receives a signal fire hydrant button actions, by the person on duty after pressing line control panel manual button to restart the pump, it is eliminating control room of a cycle pump mode; the latter is the fire hydrant button action signals as eliminating control room linkage control cycle pump logic requests issued by the signal, the controller so that the site of the program instruction bus module action, achieve automatic restart function, this is how Kai pump a way, the design-time selection can be flexible.
It should be noted that, although the fire regulation law highlights the fire-control room of the central role of automatic control, but for the fire pump such important fire safety equipment, or should be on duty officer under fire for manual control, namely the elimination control room is equipped with an automatic restart function, usually the bus system linkage control plate of Kai pump set manual mode; while on duty in control when you need very carefully, a good grasp of the timing of the start is important. The author believes that by eliminating the CCR control cycle pumps, only the fire hydrant button actions are appropriate and reliable restart pump trigger SIN-number. According to the normal operating procedures, fire hydrant button should start by firefighters, firemen arrived at the scene of the fire front Kai pump not only unnecessary, but the data show that water pump in the closed gate of the running time is limited, the pump fluid heating, extremely easy to cause accidents. Although specific to minutes or 10 minutes there is a lack of a definitive conclusion, but this time is very short, but the fire department received after a fire scene of the time limits normally 5min. If the duty officer under detectors, hands, etc of alarm signal confirmation immediately after a fire pump, water pump, Kai not only in the case of closed gates run for several minutes, and firefighters at the pump is running under the access to the first pistol, their reaction is large, may endanger the safety of firefighters. Thus eliminating control room in the control cycle pump, from personal, equipment safety, Kai pump time too early.
2 design issues
In many fire linkage system, the fire hydrant button position was reduced to merely been given alarm function, the role of Basic equivalent to Manual alarm button. This occurs mainly poor coordination between professionals, as well as the specifications of "direct cycle pump" concept of different understanding of two important reasons.
2.1 Manual alarm button and fire hydrant button settings
Manual alarm button and fire hydrant buttons function is different and manual alarm button just as fire alarm, it is the electric fire design personnel Setup, normally located in the front room, stairs, corridors, Hall, Office, place more flexible; and the role of the fire button was mainly controlled fire pump is started, it can only be set in the fire box, and it is set or not should be determined by the waterways profession according to the fire hydrant system water pressure situation. Although the doctrine of "and" jiangui on setting direct cycle pump button requirements are listed in the fire water system articles, however, the fire hydrant buttons restart pump control circuit is required by a professional to set up electrical meter is complete, therefore, in the professional internal cross references to the condition, the watercourses of professional only provide fire hydrant and set the location number is not normative, first in the conditions list made it clear that each hydrant Office (or no) direct cycle pump button, if not set, then provide the location and number of fire hydrant is meaningless.
2.2 arc control room Kai pump should multiplicity
-Control room to accept to the fire hydrant button alarm signal control cycle pump can also be counted as direct cycle pump, but this cycle pump with hydrant button directly on the pump reliability reboot is different. The fire controlSection 5.3.2 stipulates provisions description, cancellation control room should be able to manually through multiple-line direct control mode to start the fire pump gives the explanation for "once the fire alarm system failure or should they start", "should have direct control, manually create hardware circuit directly start control operations line". The provisions of this article hinges: If the alarm system failures or damage, as is already in the consumers control room and fire hydrant pump room established independent of the alarm system control circuit, so can make the pumps start is not affected. By the same token, the fire hydrant button and fire hydrant pump rooms directly with the establishment of independent of the control room of hardware control line, restart the pump control line more straightforward, even if the fire system failures or damage, expanded, and pump can be started in a timely manner; and, at the fire scene of fire fighters under fire, direct distance quickly started the fire pump.
Also, although different regions of fire departments in the understanding of the specification and enforcement is not exactly the same, but in the last 1, 2, fire safety design review and acceptance, increasingly encounter fire control detachment by fire hydrant button should be able to directly open the pump control requirements, for example, Xiamen is a residential community, 2000 in the fire acceptance in 2002, the local fire control detachment discovered fire hydrant button cannot be started directly, thus requiring fire hydrant pump rectification period, results are not only to developers creating a certain economic loss, while adding that pipe to the architectural Interior appearance also has a small impact. Therefore, in not only important in the fire protection design, fastening specification is not very good grasp of the normative provisions, should be considered in conjunction with engineering reality through party and local fire departments to communicate, if their request is still not implemented explicitly, the design should ensure that strict not just wide.
3 Summary
When the fire broke out, quick and reliable starts the fire pump on fire suppression work smoothly play a crucial role. When buildings are equipped with fire hydrant pump, the resistance of the law, the provisions in the buildings》 each hydrant must set direct cycle pump button (hydrant button) to rapidly start the fire pump distance "; in addition, the fire regulation also provides for the Elimination of the CCR shall have control to start the function of fire pumps, fire hydrant button as Kai pump trigger signal _ Consequently, fire hydrant button first is a site for direct cycle pump tool, secondly, that the action signal for eliminating control room or reliable alarm signal and Kai pump trigger signal, the fire control system status cannot be underestimated.