JP3278762B2 - Water supply method for fire prevention - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire prevention water supply method for preventing a regional fire from spreading due to a great earthquake or the like.

[0002]

2. Description of the Related Art Conventionally, as a method for supplying water for fire prevention, a water supply 40 to 100 m directly connected to a water supply under a park in each fire prevention section.
^In order to prevent the spread of fire from each fire protection water tank, a small fire prevention water tank is separately installed, and fire protection water is directly supplied to the fire pump.

[0003]

However, in the conventional fire protection water supply method, since a small fire prevention water tank is installed for each fire protection section, it cannot be easily installed in an urban area due to land shortage, and the cost is low. There is a problem that becomes high.
In addition, there is a disadvantage that the capacity is not sufficient for a large local fire caused by a great earthquake or the like. Accordingly, it is a main object of the present invention to provide a fire prevention water supply method which can easily install a fire prevention water tank at a reduced cost and can sufficiently cope with a large local fire.

[0004]

In order to solve the above-mentioned problems, a first method for supplying water for fire prevention according to the present invention is to provide a large-scale fire protection system having a structure of two or more layers under a fire protection compartment almost at the center of several fire protection compartments. Water tanks are provided to store fire-fighting water equivalent to the water storage capacity of those fire-fighting compartments, and the large-sized fire-fighting water tanks and small-sized fire-fighting water tanks of the required capacity provided underground in each surrounding fire-fighting compartment are respectively connected by water supply pipes. In addition, fire protection water can be supplied from a water storage tank on the first basement floor of a large fire prevention water tank to each small fire prevention water tank by natural flow. Second
The method for supplying fire-fighting water according to the first method is characterized in that, in the first method, the fire-fighting water is stored in the large fire-fighting water tank by at least one natural flow of river water, rainwater, and rainwater infiltration water. The third fire protection water supply method is the first or second fire prevention water supply method.
In the above method, the deterioration of the quality of the fire protection water stored in the large fire prevention water tank is prevented by water quality deterioration prevention means. On the other hand, it is preferable that the large fire prevention water tank is provided with a storage warehouse for emergency substances. Further, it is preferable that the large fire prevention water tank is provided with a simple water purification device for purifying the stored fire water.

[0005] The fire compartment has a square of 200 to 250 m.
A section is defined as about nine of the fire prevention sections as one unit.
Further, the waterproofing water capacity of one fire prevention compartment, that is, the capacity of the small fire prevention water tank is set to about 400 m ³ , and the storage capacity of the large fire prevention water tank is set to about 3600 m ³ . The water pipe should be seismic resistant. Examples of the means for preventing water quality deterioration include a purification device using nighttime electric power or the like that performs ozone sterilization or the like while circulating the stored water, a fountain that artificially aerates the stored water by performing aeration, or an artificial river.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are a conceptual diagram and a cross-sectional view of a main part showing an embodiment of a fire prevention water supply method according to the present invention. This fire prevention water supply method is 200 to 250 m.
A place where a relatively large site of the fire prevention section 1 at the center of the nine fire protection sections 1 having a square as one section can be secured,
For example, a large two-layer fire protection tank 3 of a square two-layer type is provided under the base of a public land 2 having a certain size (30 × 30 m or more) such as a park, a schoolyard, etc.
m ³ ), and a large fire tank 3 and a small fire tank 4 of a required capacity (400 m ³ ) provided underground at an appropriate place in the fire section 1 around the tank. In order to function as a fire hydrant from the water tank 6 on the first basement floor of the large fire prevention water tank 1 when a large-scale local fire occurs due to a large earthquake, etc. In this method, fire protection water can be supplied to a required small fire protection water tank 4 by natural flow accompanying opening and closing of a valve 7 of a water supply pipe 5.

As shown in FIG. 3, for example, as shown in FIG. 3, the storage of the fire water in the large fire protection water tank 3 is performed by connecting the river water of the river 8 to the water tank 10 on the second basement floor of the large fire protection water tank 3. As shown in FIG. 4, the drainage pipe 1 collects rainwater on the roof of a large building 12 such as a stadium, a gymnasium, a school, etc., adjacent to the large fire protection tank 3 as shown in FIG.
5 through the natural flow of water into the water tank 10 or, as shown in FIG. 5, the underground rainwater infiltration water of the public land 2 such as a park, a schoolyard, a stadium, etc. adjacent to the large fire protection water tank 3 Or by combining two or more of them by the natural flow down to the water storage tank 10 through the water collecting pipe 14.

[0008] The large fire prevention water tank 3 of the square two-layer type is shown in FIG.
As shown in FIG. 8, the water intake port 6a is provided to function as a fire hydrant or a water supply tank, and the capacity is relatively small (400
m ³ ) The water storage tank 6 having a free water surface on the first basement floor.
And a water tank 10 having a relatively large capacity (3,200 m ³ ) on the second basement floor having a free water surface, and water is stored at a required location of the water storage tank 10 on the second basement floor. There is a sand basin (not shown) that removes sediment from river water, rainwater, and rainwater seepage water. The water storage tank 6 on the first basement floor has a depth of 4.5 m that can be pumped by a fire engine, and the fire protection water stored in the water storage tank 10 on the second basement floor is the first basement floor water. The pump 15 (see FIGS. 2 to 5) installed in the machine room 14 draws water into the water storage tank 6 on the first basement floor using nighttime electric power and the like. Is circulated through a purifying device (not shown) installed in the apparatus. As means for preventing deterioration of the water quality of the fire prevention water, in addition to the circulation through the above-mentioned purification device, the second machine room 1
A pump (not shown) installed in 6 circulates stored water in fountains such as parks and artificial rivers to perform aeration, keeps the stored water aerobic with ozone, etc., and attaches mold to the tank wall Is to be prevented. The large fire prevention water tank 3 of the square two-layer type has a simple water purification device (not shown) installed in the second machine room 16 for purifying the stored fire prevention water and turning it into drinking water. An electric room 17 in which a generator (not shown) serving as a power source is installed is provided on the first basement floor, and a storage warehouse 18 for storing emergency substances such as food and clothes is provided on the first basement floor. .

Incidentally, the large fire prevention water tank 3 is not limited to a square two-layer type, but is wider and narrower (diameter 20) as the public land 2 is located.
m or more), a large fire prevention water tank 19 of a circular deep layer type may be used as shown in FIGS. The large fire prevention water tank 19 has a five-layer structure, has an intake port 20a to function as a fire hydrant, and has a relatively small capacity (400 m ³ ) water tank 20 having a free water surface on the first basement floor and a storage tank. A warehouse 21, a storage warehouse 22 on the second basement floor, a machine room 23 in which a pump, a purification device, a simple water purification device (not shown) is installed, and an electric room 2 in which a generator and the like (not shown) are installed.
3, water tanks 25, 26, 27 having free water surfaces from the third basement to the fifth basement, each having a capacity of about 1100 m ^3, and a maintenance passage 28 provided through the center of each floor. The fire protection water is stored as in the case of the square two-layer type, and each small fire prevention water tank 4 is provided.
Or water for fire protection.

Further, as shown in FIG. 13, a part of the water supply pipe 5 is provided in the common groove 29 to further enhance the earthquake resistance. The communal ditch 29 accommodates a lifeline 30 such as an electric wire, a telephone line, and a water pipe which is always used, and a second lifeline 31 which is used in the event of a disaster. It has a passage 32 which is used as a road or an evacuation route, and which is always used as a maintenance passage.

[0011]

As described above, according to the first fire protection water supply method of the present invention, several fire protection zones are networked by one large fire protection water tank, a water supply pipe, and a small water storage tank for each fire protection zone. In the event of a large fire, fire protection water is supplied to the required small fire protection water tank by natural flow from the large fire protection water tank, so that the fire protection water tank can be easily installed at a lower cost than before, Maintenance can be easily performed, and even if a large fire occurs in one place, it is possible to sufficiently cope with the fire. According to the second fire prevention water supply method, in addition to the operation and effect of the first method, river water and rainwater, which are not as high-quality as tap water, can be effectively used, so that valuable water resources can be effectively used. or,
According to the third fire protection water supply method, in addition to the effects of the first or second method, deterioration of water quality such as decay of stored fire protection water and adhesion of mold to the tank wall can be prevented. ,
It can also be used for applications other than fire prevention, such as hydrophilic facilities. On the other hand, land use for disaster prevention can be effectively performed because the large fire prevention tank has a storage warehouse for emergency substances. Since the large fire prevention water tank is provided with a simple water purification device, drinking water at the time of disaster can be secured. In addition, since a part of the water supply pipe is provided in the common groove, the earthquake resistance of the water supply pipe can be partially improved, and a damaged portion can be found immediately.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing an embodiment of a fire prevention water supply method according to the present invention.

FIG. 2 is a sectional view of a main part showing an embodiment of a fire prevention water supply method according to the present invention.

FIG. 3 is a sectional view showing a first water storage method in the fire protection water supply method of FIG. 1;

FIG. 4 is a sectional view showing a second water storage method in the fire prevention water supply method of FIG. 1;

FIG. 5 is a sectional view showing a third water storage method in the fire prevention water supply method of FIG. 1;

FIG. 6 is a sectional view of a large fire prevention water tank used in the fire prevention water supply method of FIG. 1;

FIG. 7 is a sectional view taken along line VII-VII in FIG. 6;

FIG. 8 is a sectional view taken along line VIII-VIII in FIG.

9 is a cross-sectional view of another large-sized fire prevention water tank used in the fire prevention water supply method of FIG.

FIG. 10 is a sectional view taken along line XX in FIG. 9;

FIG. 11 is a sectional view taken along line XI-XI in FIG. 9;

FIG. 12 is a sectional view taken along line XII-XII in FIG. 9;

FIG. 13 is a sectional view of a common groove used in the method for supplying water for fire prevention of FIG. 1;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 fire prevention compartment 3 large fire prevention water tank 4 small fire prevention water tank 5 water supply pipe 6 water storage tank 7 valve 8 river 9 water intake port 10 water storage tank 11 water conveyance pipe 13 water collecting pipe 18 storage warehouse 19 large fire protection water tank 20 storage tank 21 storage warehouse 22 storage 25 water tank 26 water tank 27 water tank 29 common ditch

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Hei 10-108066 (JP, U) Japanese Utility Model 57-133669 (JP, U) Japanese Utility Model 58-29661 (JP, U) Utility model registration 3018436 (JP, U) JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) E03B 3/03 E03B 11/14 E03B 11/00

Claims (6)

(57) [Claims] 1. A fire protection tank having a structure of two or more layers is provided under the fire protection compartment substantially at the center of some fire protection compartments to store fire protection water corresponding to the water storage capacity of the fire prevention compartments. The fire protection water tank and the small fire protection water tank of the required capacity provided in the basement of each fire protection area around it are connected by a water supply pipe, and the fire protection water is naturally supplied from the storage tank on the first basement floor of the large fire protection water tank to the required small fire protection water tank. A method for supplying water for fire prevention, characterized in that the water can be supplied by flowing down. 2. The fire protection water supply method according to claim 1, wherein the storage of the fire prevention water in the large fire prevention water tank is performed by natural flow of at least one of river water, rain water, and rain water seepage water. 3. The fire protection water supply method according to claim 1, wherein deterioration of the water quality of the fire protection water stored in the large fire prevention water tank is prevented by water quality deterioration prevention means. 4. The fire prevention water tank according to claim 1, further comprising a storage warehouse for emergency substances.
The water supply method for fire prevention according to the above. 5. The fire protection water supply method according to claim 1, wherein the large fire prevention water tank is provided with a simple water purification device for purifying stored fire protection water. 6. The fire protection water supply method according to claim 1, wherein a part of the water supply pipe is provided in a common groove.