Background
Automatic sprinkler systems were the first line of life for fire safety in existing buildings. The working principle of the existing automatic water spraying fire extinguishing system is that when a fire disaster occurs and the temperature rise meets the condition that a closed nozzle is opened, the closed nozzle starts spraying water. After water flows in the pipeline, the wet alarm valve is opened, the water is led to a channel of the hydraulic alarm bell after passing through the delayer, the water flow impacts the hydraulic alarm bell to generate an audible alarm signal, meanwhile, a pressure switch signal in front of the hydraulic alarm bell is transmitted to the fire pump control box, the fire pump is started to supply water to the pipe network in a pressurized mode, and the purpose of continuously and automatically spraying water to extinguish fire is achieved.
However, the existing automatic water spraying fire extinguishing system supplies water in a branch shape, and has the problem of low water supply reliability. For example, for a fire acceptance project, the following may occur: the tail end water testing device of the water spraying fire extinguishing system detects pressure water, and accords with acceptance indexes, but a certain position of the spraying pipe is blocked, the water supply of a pipeline at the rear end of the spraying pipe is insufficient in pressure, even the spraying pipe is seriously blocked, and the pipeline at the rear end is free of water.
When a fire disaster occurs in the project, the water spraying pressure of all the spray heads in the pipeline at the rear end of the blocked position is insufficient or no water is sprayed, so that the situation that the fire cannot be effectively extinguished is caused, and the serious consequence of fire spreading is caused. And under the condition that the water pressure of the nozzle is insufficient, the delayed start of the wet alarm valve can also occur, and the timely start of the fire pump is seriously influenced.
Disclosure of Invention
The invention aims to provide an automatic water spraying fire extinguishing system using an indoor fire hydrant annular pipe network for water supply and a construction method thereof.
The technical scheme of the invention is as follows: the utility model provides an utilize automatic water spray fire extinguishing system of indoor fire hydrant ring pipe network water supply, includes roof water supply network and floor water supply network, is located the interval between roof water supply network and the floor water supply network and is provided with the fire hydrant riser that a plurality of roots are linked together, and it has the shower to lie in the intercommunication between the two adjacent fire hydrant risers in every floor, be provided with the closed shower nozzle on the shower, floor water supply network is linked together and is provided with the fire pump through the fire pond at the bottom of water supply pipeline and floor, be provided with the low pressure switch who is connected with the fire pump electricity on the water supply pipeline, roof water supply network is linked together through gravity flow pipeline and roof water tank, be provided with the flow switch who is connected with the fire pump electricity on the gravity flow pipeline.
Furthermore, the water supply pipe network at the bottom of the building is an annular pipe network.
Further, the both ends and the water supply network intercommunication of building end of a building of water supply pipeline, at least two fire pumps are installed to the water supply pipeline, low pressure switch sets up on the pipeline between two fire pumps.
Furthermore, a branch pipe connected with a water pump adapter is arranged on the floor water supply pipe network.
Furthermore, fire hydrant transverse branch pipes are respectively arranged on the fire hydrant vertical pipes on each floor.
Furthermore, the end of the gravity flow pipeline penetrating into the roof water tank is provided with a rotational flow preventer.
Further, an exhaust pipeline is arranged on the roof water supply pipeline network, and an automatic exhaust valve is installed on the exhaust pipeline.
Furthermore, an experimental fire hydrant and a pressure gauge are arranged on the roof water supply pipe network.
A construction method of an automatic water spraying fire extinguishing system using indoor fire hydrant annular pipe network for water supply comprises the following steps:
1) a roof water supply pipe network and a floor water supply pipe network are correspondingly arranged on the roof and the floor, and a plurality of fire hydrant vertical pipes and fire hydrant horizontal branch pipes are arranged between the roof water supply pipe network and the floor water supply pipe network at intervals;
2) a spray pipe is arranged between two adjacent fire hydrant vertical pipes on each floor, and a closed spray head is arranged on the spray pipe;
3) a low-pressure switch is arranged on a pipeline between two fire pumps of the water supply pipeline and is electrically connected with the fire pumps; and meanwhile, a flow switch is installed on a gravity flow pipeline of the roof water tank and is electrically connected with the fire pump.
Compared with the prior art, the invention has the following advantages: each spray pipeline of the automatic water spraying fire extinguishing system can form annular water supply, namely four-direction water supply is formed, the water supply capacity of the spray pipelines is ensured, and the problem that branch-shaped water supply of the spray pipelines is unreliable is effectively solved; meanwhile, the fire pump is started through the low-pressure switch and the flow switch, so that the reliability of the spraying system is effectively improved; in addition, this automatic water spray fire extinguishing system combines together fire hydrant system and sprinkler system, has reduced fire pump, water supply pipe network, the spray trunk among the former sprinkler system, is showing saving cost, reduces the construction, and construction convenience simultaneously.
Detailed Description
In order to make the aforementioned features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below, but the present invention is not limited thereto.
Refer to FIG. 2
The utility model provides an utilize automatic water spray fire extinguishing system of indoor fire hydrant ring pipe network water supply, includes roof water supply network 10 and floor water supply network 20, is located and is provided with the fire hydrant riser 30 that a plurality of roots are linked together at the interval between roof water supply network and the floor water supply network, and it has shower 40 to lie in the intercommunication between the two adjacent fire hydrant risers in every floor, according to a plurality of closed shower nozzles 41 of design demand installation on the shower, floor water supply network is linked together and is provided with fire pump 51 through water supply pipeline 60 and the fire pond 50 of floor, be provided with the low pressure switch 61 of being connected with the fire pump electricity on the water supply pipeline 60, roof water supply network is linked together through gravity flow line 70 and roof water tank 80, be provided with flow switch 71 of being connected with the fire pump electricity on the gravity flow line.
In this embodiment, in order to effectively realize safe water supply, the water supply pipe network of building bottom is the ring-shaped pipe network.
In this embodiment, the both ends and the downstairs water supply network intercommunication of water supply pipeline, two at least fire pumps are installed to the water supply pipeline, low pressure switch sets up on the pipeline between two fire pumps to improve the water supply security.
In this embodiment, for the convenience of the installation of water supply pipe network, water supply pipe can pass the pre-buried steel casing pipe of basement outer wall and be linked together with the water supply pipe network of building bottom when the construction.
In this embodiment, in order to facilitate the installation of the water pump adapter, a branch pipe 21 for connecting the water pump adapter is provided on the floor water supply network.
In this embodiment, in order to facilitate installation of the fire hydrant, the fire hydrant vertical pipe is provided with a fire hydrant transverse branch pipe 31 on each floor.
In this embodiment, to prevent siphoning, a vortex breaker 72 is installed at the end of the gravity flow line that penetrates the roof tank.
In this embodiment, in order to facilitate the pipeline exhaust, an exhaust pipeline 73 is arranged on the roof water supply pipeline network, and an automatic exhaust valve 76 is installed on the exhaust pipeline.
In this embodiment, in order to detect the fire fighting effect, an experimental fire hydrant 74 and a pressure gauge 75 are provided on the roof water supply network.
The construction method of the automatic water spraying fire extinguishing system using the indoor fire hydrant annular pipe network for water supply comprises the following steps:
1) a roof water supply pipe network and a floor water supply pipe network are correspondingly arranged on the roof and the floor, and a plurality of fire hydrant vertical pipes and fire hydrant horizontal branch pipes are arranged between the roof water supply pipe network and the floor water supply pipe network at intervals;
2) a spray pipe is arranged between two adjacent fire hydrant vertical pipes on each floor, and a closed spray head is arranged on the spray pipe;
3) a low-pressure switch is arranged on a pipeline between two fire pumps of the water supply pipeline and is electrically connected with the fire pumps; and meanwhile, a flow switch is installed on a gravity flow pipeline of the roof water tank and is electrically connected with the fire pump.
The working principle of the automatic water spraying fire extinguishing system is as follows: when the temperature rise when the conflagration takes place satisfied the condition that closed shower nozzle opened, closed shower nozzle began to spray water, and water flows in the pipeline, and when low pressure switch detected water pressure and was less than the setting value, feedback information gave fire pump control box 90, and fire pump control box made the fire pump open. In addition, the flow switch on the roof can be actuated by the flowing of water flow in the outer pipe network, and information is fed back to the fire pump control box, so that the fire pump is started by the fire pump control box.
Any one spray pipe in the automatic water spraying fire extinguishing system supplies water in four directions, and when a certain position in the spray pipe is blocked, the pipe network can still normally supply water, so that the reliability of water supply of the automatic water spraying fire extinguishing system is completely ensured.
Simultaneously, the fire pump in this application has two kinds of pump starting modes for original spraying fire extinguishing systems, effectively improves whole fire extinguishing systems's reliability.
Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.
If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.
If the invention discloses or relates to parts or structures which are fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated.
Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
The above description is only a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that various automatic sprinkler systems using water supply of indoor fire hydrant loop network according to the teachings of the present invention may be designed without inventive labor and all the changes, modifications, substitutions and alterations made without departing from the spirit and scope of the invention as defined by the appended claims.