JP3975420B2 - Performance evaluation method of water discharge head for fire extinguishing equipment - Google Patents

Description

BACKGROUND OF THE INVENTION
[0001]
  The present invention is connected to a fire extinguishing pipe and discharges fire-fighting water supplied under pressure in a fire.Of water discharge head for fire fighting equipmentThe present invention relates to a performance evaluation method.
[Prior art]
[0002]
  Conventionally, a head used for a sprinkler fire extinguishing facility is generally installed on a ceiling surface having a height of 2 to 3 meters. In order to evaluate the performance of such a normal head, a large number of squares of a predetermined size are arranged on the floor, and a watering test is conducted with the head installed 1.2 meters above the upper surface of the mass. It is determined by the standard that a water discharge pattern can be obtained in a watering area having a specified radius (for example, 2.6 meters) at the height of the surface, and a specified watering amount or more determined for each measuring mass.
[Patent Document 1]
  JP-A-7-265456
[Patent Document 2]
  JP 7-299156 A
[Problems to be solved by the invention]
[0003]
  By the way, depending on the form of a building, a head may be installed also in a high ceiling part near 10 meters. However, when the installation height of the head is increased, the watering radius is inevitably widened, the amount of watering near the head is reduced, and when the installation height is further increased, the area where the watering amount is small further increases.
[0004]
  In this case, it is conceivable to install the heads closely to compensate for the shortage of water sprayed directly under the head, but it is unclear which head will operate in the event of a fire, and the area where the required amount of fire-fighting water will not be sprayed in the event of a fire. Will occur.
[0005]
  The purpose of the present invention is toWater discharge for fire extinguishing equipmentEasily determine whether the head is for high ceiling or low ceilingDisappear Of water discharge head for fire equipmentIt is to provide a performance evaluation method.
[Means for Solving the Problems]
[0006]
  In order to achieve this object, the present inventionWater discharge for fire extinguishing equipmentThe head performance evaluation method is provided, and the following procedure is taken.
[0007]
  (1) The head in the ideal water discharge pattern is set by setting an ideal water discharge pattern that can obtain the specified water spray amount in the water spray area of the specified radius on the water spray surface set to the specified height from the floor in response to changes in the installation height of the head. Decreased a predetermined height from the installation position, for example, about 1-2 metersWateringFind the sprinkling distribution at the locationIdeal watering distributionDefine the relationship between installation height and ideal sprinkling distribution.
[0008]
  (2) The head was lowered by a predetermined height from the head installation position by the head discharge test.WateringMeasure the watering distribution at the location.
[0009]
  (3) From the relationship between the head installation height and the ideal watering distribution,Results of sprinkling distribution at the measured sprinkling position of the evaluation target head actually measuredAnd ideal watering distributionCompareTo the ideal watering distribution satisfying the watering performance in the entire radius regionCorresponding head installation heightAs the installation height of the head to be evaluatedAsk.
[0010]
  In this case, the ideal water discharge pattern is set for each mass in the watering area with a specified radius of 2.6 meters on the watering surface set on the upper surface of the measuring mass installed on the floor surface with respect to the change in the installation height of the head. The water discharge pattern will provide more than the specified water spray amount. Moreover, the performance evaluation method of the water discharge head for fire extinguishing equipment of this invention classifies into the object for high ceilings and the object for low ceilings from the installation height which calculated | required the head made into evaluation object.
[0011]
  In such a method for evaluating the performance of a water discharge head for fire extinguishing equipment, the water spray distribution at the measured water spray position 1 to 2 meters below the head is measured, and this measured water spray distribution is measured with the installation height and ideal in the ideal water spray pattern. By comparing with the sprinkling distribution, the optimum installation height of the target head can be estimated.
[0012]
  For this reason, a high ceiling is obtained by a water discharge test at the same installation height as a normal low ceiling of 1 to 2 meters without requiring an evaluation test in which the head is installed at a height of 5 to 10 meters and discharged. It can be easily evaluated whether the head is suitable for the above.
[0013]
  In addition, by applying the performance evaluation method of the present invention to existing heads, it is possible to evaluate performance for high ceilings or low ceilings, thereby installing appropriate heads classified by performance evaluation according to installation height Even if the installation height is different, the necessary amount of fire-fighting water can be sprinkled in the necessary area in the event of a fire.
DETAILED DESCRIPTION OF THE INVENTION
[0014]
  FIG. 1 shows an embodiment of the sprinkler fire extinguishing equipment of the present invention. In FIG. 1, a fire extinguishing pump 1 and a motor 2 are installed on the basement of the building, and the fire pump 1 is operated by driving the motor by the pump control panel 15, pumping up fire extinguishing water in the water storage tank 3, and in the vertical direction of the building. Pressure is supplied to the piped water supply main pipe 4.
[0015]
  An elevated water tank 5 is installed on the roof of the building, and the water supply main is always filled with fire-fighting water. Also, the internal pressure of the water supply main pipe 4 is introduced into the pressure tank 13 to compress the internal air. When the internal pressure drops below the specified pressure by the operation of the head, the pressure switch 14 is turned on, and the pump control panel 15 The fire pump 1 is driven to operate.
[0016]
  A flowing water detection device 7 is installed in the branch pipe 6 branched from the water supply main pipe 4, and a flowing water detection switch 8 is provided in the flowing water detection device 7. The branch pipe 6 on the secondary side of the water flow detector 7 is piped on a specific floor of the building.
[0017]
  The floor surface 10 of the floor has a normal low ceiling and a high ceiling part that exceeds 5 meters, and a low ceiling head 9L is installed in the low ceiling part. Is provided with a high ceiling head 9H. Further, a terminal test valve 11 and an orifice 12 are provided on the terminal side of the branch pipe 6.
[0018]
  Here, the low ceiling head 9L has a water discharge pattern 18L, and the high ceiling head 9H has a water discharge pattern 18H, and the water spray areas of the floor surface 10 by the water discharge patterns 18L and 18H are almost the same size. The water discharge pattern is decided.
[0019]
  That is, if the radius of the water spray area on the floor surface 10 by the water discharge pattern 18L of the low ceiling head 9L is R, the radius of the water spray area of the floor surface 10 is substantially the same R even by the water discharge pattern 18H of the high ceiling head 9H. The direction of water discharge from the head is determined.
[0020]
  Specifically, the water discharge angle of the high ceiling head 9 </ b> H with respect to the water discharge angle of the low ceiling head 9 </ b> L has a structure in which water is discharged downward so that the water spray area does not spread too much.
[0021]
  FIG. 2 is an explanatory view of a water discharge pattern with respect to the installation height of the head according to the present invention. In FIG. 2, in this embodiment, heads 9H, 9M, and 9L are installed corresponding to high ceilings, middle ceilings, and low ceilings having heights HH, HM, and HL. The heads 9H, 9M, and 9L adapted to different installation heights as described above are sprayed from the head so that the sprayed areas 20H, 18M, and 18L in the floor surface 10 serving as the water discharging surface are substantially the same. Angles θH, θM, and θL are defined, and a structure for setting a water discharge angle satisfying θH <θM <θL is provided between them.
[0022]
  FIG. 3 shows a cross-sectional structure of a closed head as an example of the head according to the present invention. FIG. 3 (A) shows a structure before operation, and FIG. 3 (B) shows a structure when operated by receiving a hot air current from a fire.
[0023]
  In FIG. 3A, the closed head 9 </ b> A has a valve body 22 disposed at the opening of the internal flow path of the head body 21, and a deflector 23 is attached to the outside of the valve body 22. The valve body 22 receives the assembly load of the thermal decomposition section 24 below the head body 21 to close the flow path.
[0024]
  The thermal decomposition part 24 is provided with a solder fuse 25 and a heat collecting plate 26 that melt at a predetermined temperature when receiving a hot air current due to a fire.
[0025]
  The closed head 9A shown in FIG. 3A is supplied with pressurized fire-extinguishing water while being installed in a predetermined monitoring area of the branch pipe 6 as shown in FIG. The water is not discharged by holding it.
[0026]
  In this state, when a thermal airflow due to a fire is received by the thermal decomposition unit 24, the solder fuse 25 melts when the temperature rises to a predetermined temperature, for example, 75 ° C., and the thermal decomposition unit 24 decomposes and falls off, thereby supporting the valve element 22. As shown in FIG. 3B, the valve element 22 falls together with the deflector 23 and is positioned below the head body 21 by the support piece 27.
[0027]
  In this state, pressurized fire-extinguishing water is discharged from the water spout 21a of the head main body 21, hits the deflector 23, and sprays fire-extinguishing water on the floor surface or the like by a water discharge pattern as shown in FIG.
[0028]
  FIG. 4 shows an embodiment of the deflector 23 used in the closed head 9A shown in FIG. 3. FIG. 4A shows a low ceiling deflector 23L, and FIG. 4B shows a high ceiling deflector 23H. .
[0029]
  The low ceiling deflector 23L is provided with a plurality of cuts 28 around the periphery, and fire-extinguishing water is sprinkled through the cuts in the direction directly below the head, and fire-extinguishing water is discharged laterally at the parts without the cuts 28. By combining the two, for example, the water discharge pattern 18L of the low ceiling head 9L of FIG. 2 is obtained.
[0030]
  On the other hand, the high ceiling deflector 23H shown in FIG. 4B is further divided into three arcuate slit holes 29 inside the cuts 28 formed in the periphery. The water discharged from the water mouth will go downward through the slit hole 29,4Compared with the low-ceiling deflector 23L, the water sprinkling to the surroundings is suppressed, so that the sprinkling area does not spread too much even in the high ceiling installation state, and substantially depends on the water discharge amount θA of the high ceiling head 9H in FIG. The water discharge pattern 18H is realized.
[0031]
  FIG. 5 shows another embodiment of the high ceiling deflector used in the closed head 9A of FIG. 3, and it is shown in contrast to the low ceiling deflector, as in FIG. In contrast to the low ceiling deflector 23L in FIG. 5 (A), the high ceiling deflector 23H in FIG. 5 (B) has a deep cut 28a in the radial cut, and the low ceiling deflector 23L in FIG. 5 (A). A deeper cut is made in the center direction than the cut 28.
[0032]
  For this reason, the water for fire extinguishing discharged from the water spout 21a in the state of FIG. 3 (B) is sprinkled toward the center from the deep cut 28a extending in the center direction. Water can be sprayed downward so that the watering area does not spread too much.
[0033]
  Here, the structure for watering downward so that the watering area does not spread too much for high ceiling installation is not limited to the structure of the deflector of FIGS. 4B and 5B, and appropriate deflector cuts and openings , It can be shaped.
[0034]
  Further, the watering area may be set by adjusting the size (radius) of the deflector 23. For high ceiling installation, the radius of the deflector is made smaller so that the watering area does not spread too much than for low ceiling installation.
[0035]
  Moreover, you may carry out by changing the magnitude | size of the center protrusion part of the valve body 22 of FIG. 3 (B). For example, in the case of low ceiling installation, the radius width or height width of the valve body 22 is suppressed, and the area of the deflector 23 to which the fire-fighting water hits is increased to widen the watering area. On the contrary, if it is for high ceiling installation, the radius width and height width of the center protrusion part of the valve body 22 are enlarged, and the area of the deflector where the fire-extinguishing water hits is reduced so as not to spread too much.
[0036]
  Then according to the present inventionWater discharge for fire extinguishing equipmentA head performance evaluation method will be described. As shown in FIGS. 4 and 5, for example, by changing the shape of the deflector 23, whether or not the water discharge range 20 is substantially the same even if the installation height as shown in FIG. I don't know unless I try.
[0037]
  For this purpose, the water discharge test is performed at a ceiling height where the head is actually installed, for example, a height of 2-3 meters for a low ceiling and a height of 10 meters for a high ceiling, for example. Just try. However, installing a head on a high ceiling, such as 10 meters, to conduct a water discharge test, such a high ceiling water discharge test facility is a very special facility, and a special building must be built. It is actually impossible to install and conduct a water discharge test.
[0038]
  Therefore, the present inventionWater discharge for fire extinguishing equipmentIn the performance evaluation method of the head, a performance test equivalent to that performed on a high ceiling of 10 meters with a normal head installed on a low ceiling of about 1 to 2 meters is performed. Provide a performance evaluation method that can be used.
[0039]
  FIG. 6 represents the ideal water discharge pattern of the head for installation heights up to 10 meters.
[0040]
  hereWater discharge for fire extinguishing equipmentIn the performance test of the head, a large number of squares of a predetermined size are arranged on the floor surface 10, and the amount of water discharged when a water discharge test is performed toward this square is determined for each square with a radius R = 2.6 meters. It is tested whether it satisfies the standard performance exceeding the specified water discharge amount.
[0041]
  In order to obtain a water discharge pattern that realizes performance exceeding the specified water discharge amount for each mass in the area of the radius R = 2.6 meters of the standard watering surface 30 used for the performance test on the standard, for example, the installation height As H, ideal water discharge patterns 18a to 18e are set for the heads 9a, 9b, 9c, 9d, and 9e installed at 10 meters, 8 meters, 6 meters, 4 meters, and 1.4 meters, respectively.
[0042]
  The test at the height of the head 9e is a conventional height, and when the height of the mass is 0.2 m, the head is 1.2 meters higher than the upper surface of the mass by 1.4 meters. Is set to be an ideal water discharge amount at a height of 0.2 meters and a radius R = 2.6 meters, and the water spray amount for each mass becomes a specified water spray amount.
[0043]
  For these ideal water discharge patterns 18a to 18e, the water discharge direction and the water discharge speed from the head 9 are set, and the fall trajectory is calculated from the equation of motion based on the gravitational acceleration. Of course, it is also possible to install a head at each height and measure the water discharge pattern so that the specified water discharge amount can be obtained for each mass at the radius R = 2.6 meters on the standard watering surface 30 to obtain an ideal water discharge pattern. Good.
[0044]
  Thus, if the ideal water discharge patterns 18a-18e are calculated | required about the heads 9a-9e from which installation height differs, the position where only predetermined height Ht fell from each head 9a-9e is made into the measurement water spray surfaces 31a-31e. The height Ht for setting the measurement water discharge surfaces 31a to 31e may be about Ht = 1 meter, for example.
[0045]
  In this embodiment, Ht is adjusted to 1.2 meters of the conventional test method.
[0046]
  Accordingly, the measurement water discharge surfaces 31a to 31e are set at the positions of 8.8 meters, 6.8 meters, 4.8 meters, 2.8 meters, and 0.2 meters for the heads 9a to 9e, respectively. The
[0047]
  If the measurement water discharge surfaces 31a to 31e can be set in this way, the water spray radii R10, R8, R5, R4 and R1.4 of the ideal water discharge patterns 18a to 18e intersecting with each other and the measurement water discharge surfaces 31a to 31e, respectively. Calculate the amount of water spray for each square when the squares are arranged.
[0048]
  Next, as shown in FIG. 7, the horizontal axis indicates the water spray radius R of the water discharge pattern on the measurement water discharge surface set at a predetermined height Ht below the head, and the vertical axis indicates the water sprayed on the mass. Taking the amount of water L and showing the distribution relationship between the radius R and the amount of water spray L at the measured water spray surfaces 31a to 31e for each installation height H = 10, 8, 6, 4, 1.4 meters. The relationship of ideal sprinkling distribution lines G1.4, G4, G6, G8, and G10 as shown is obtained.
[0049]
  The relationship between the sprinkling radius R and the sprinkling amount L is set to the same sprinkling amount from 0 m to the maximum radius in order to simplify the explanation. However, when the head is actually installed, it may be nonlinear. Moreover, it can be easily understood that various characteristics are obtained depending on the structure of the head to be used, and an optimum characteristic suitable for the head to be actually used is created.
[0050]
  FIG. 7 shows that, for example, in the case of a head used at an installation height of 1.4 meters, the amount of water sprayed on the masses arranged in a radius of 0 to 2.6 meters as surrounded by diagonal lines is L1. 4 (ml / min). The same applies to the other 4, 6, 8, and 10 meters. In the case of 10 meters, the watering amount is L10 (ml / min) from the radius of 0 to R10 meters.
[0051]
  If the relationship between the radius R and the sprinkling amount L at the installation height H in FIG. 7 can be defined in this way, the performance evaluation of an arbitrary head is performed using this relationship. In this performance evaluation, the head to be evaluated is first subjected to a test of about 1 to 2 meters which is a normal watering test facility.
[0052]
  In other words, a measurement mass is laid on the floor surface, and the upper surface of the mass is set as a measurement water spray surface, and is positioned at a predetermined height (for example, 1.2 meters in the embodiment of FIGS. 6 and 7) from the measurement water spray surface. Install the head.
[0053]
  Since measurement can be prepared by this, pressurized water for fire extinguishing is supplied to the head to perform a sprinkling test, and the sprinkling radius Rx from the storage state of the water sprayed on the mass placed on the measurement sprinkling surface 1 to 2 meters below the head Measure the amount of water sprayed.
[0054]
  If the water spray distribution can be measured by the actual water discharge in this way, it is written in the distribution graph of the radius R and the water spray amount L in FIG. 7, and the ideal water spray distribution lines G1.4, G4, G6, G8, Compare with G10.
[0055]
  For example, when the water spray distribution of the tested head is the distribution curve A shown in FIG. 7, the water spray amount in the entire radius region than the ideal water spray distribution lines G1.4 and G4 of 1.4 meters and 4 meters. Therefore, it can be seen that the head of the distribution curve A can be installed at a height of 4 meters or less. Similarly, the distribution curve B can be installed at a height of 4 to 6 meters, and the distribution curve C can be installed at a height of about 7 to 10 meters.
[0056]
  The head performance evaluation method according to the present invention shown in FIGS.43B equipped with the high ceiling deflector 23H of FIG. 5B or FIG. 5B, a water discharge test is performed in the state of FIG. By obtaining an effective installation height range by applying it to the linear characteristics, the optimum installation height can be obtained by opening the slit hole 29 inward in FIG. 4B or making the deep cut 28a in FIG. 5B. You can easily evaluate how much.
[0057]
  Then, the position and size of the slit hole 29 are adjusted so as to achieve the required installation height, and further, the depth and depth of the deep cut 28a are adjusted to obtain the installation height required for the high ceiling head. A head with suitable optimum fire fighting performance can be obtained.
[0058]
  In the actual performance evaluation of the head, it is not necessary to obtain a strict installation height. Basically, it is only necessary to be able to perform performance evaluation that can be classified into two types for high ceiling and low ceiling. Accordingly, from FIGS. 6 and 7, for example, if the effective installation height obtained by performance evaluation is less than 5 meters, the head is classified as a low ceiling head, and if it is 5 meters to 10 meters, it is classified as a high ceiling head.
[0059]
  Further, since the accuracy in the two-stage classification is low, as shown in FIG. 2, the classification may be made in three stages of a low ceiling, a middle ceiling, and a high ceiling from the installation height based on the performance evaluation. For example, you may classify | categorize into three steps, such as less than 4 meters for low ceilings, 4 meters or more and less than 6 meters for medium ceilings, and 7 meters or more for high ceilings. Of course, it can be appropriately classified into 4 steps and 5 steps as required.
[0060]
  Such a performance evaluation method for a water discharge head for fire extinguishing equipment according to the present invention can also be used as an evaluation method for selecting whether an existing head is for a low ceiling or a high ceiling.
[0061]
  That is, with respect to a commercially available head, the effective installation height range is obtained by applying the performance evaluation method of the water discharge head for fire extinguishing equipment according to the present invention. Since this installation height Hx varies depending on the structure and type of the head, the performance test is performed on, for example, 10 samples of the same type of head to determine the installation height Hx, and the optimum installation of the head is obtained from the average value. Find the height.
[0062]
  When such an evaluation is performed, some existing heads have a water discharge pattern suitable for high ceilings depending on the model, and this can be selected and used as a head for high ceilings. In practice, the performance evaluation method of the present invention can be used to select the optimum head for the height of the ceiling surface on which the head is installed.
[0063]
  For example, if the ceiling is a head installed at 4 meters, the existing head satisfying the ideal watering distribution of 4 meters in height is selected as the optimum head by the performance test of the water discharge head for fire extinguishing equipment according to the present invention. Can be installed.
[0064]
  Next, an embodiment of a scanning head will be described as another embodiment of the head according to the present invention. FIG. 8 is an external view of the scanning head 9B according to the present invention. The scanning head 9B has a connection screw portion 33 connected to a water supply pipe for supplying fire-extinguishing water to the upper portion of the nozzle body 32, and a fire portion at the lower portion. A heat-sensitive operating mechanism 34 that thermally decomposes and drops off at a predetermined temperature is projected.
[0065]
  FIG. 9 is a cross-sectional view showing an operation state in which fire-extinguishing water is sprayed when the scanning head 9B of FIG.
[0066]
  In FIG. 9, when the thermal operation mechanism 34 falls off due to thermal decomposition in response to a thermal air current due to a fire, the nozzle portion 38 protrudes to the lower portion of the nozzle body 32 as shown in the figure by the force of the spring 50 and the weight of the nozzle portion 38, and The shaft 42 is also lowered, the valve body 41 is separated from the valve seat 41a, and the inflow path 35 that has been closed is opened.
[0067]
  For this reason, the fire-extinguishing water pressurized from the water supply pipe (not shown) connected to the connection screw portion 33 side flows into the periphery of the drive portion 36 through the inflow path 35 as indicated by the arrow, and the water flow is caused to flow through the impeller 36a. The housing 36b rotates by generating a rotational force by passing.
[0068]
  The rotation of the drive unit 36 is decelerated by a reduction unit 37 using a double planetary gear mechanism provided inside, and the reduced rotation is transmitted to a fixed guide 45 extending from the carrier case 44. At this time, the nozzle portion 38 is at the position shown in the figure processed downward along the fixed guide 45. By receiving the reduced rotation of the carrier case 44 of the reduction portion 37 through the fixed guide 45, for example, the amount of water is 40 liters / liter. If it is minutes, it is decelerated and rotated at about 1 rpm.
[0069]
  The water flow that has passed through the drive part 36 flows into the nozzle part 38 from the portion of the fixed guide 45, and is sprinkled to the outside through the slit hole 40 that is opened by forming a linear groove outward from the center.
[0070]
  Here, the nozzle portion 38 is constituted by an assembly assembly of the first member 38A, the second member 38B, and the third member 38C. Of these, the assembled state of the second member 38B and the third member 38C is taken out in FIG. ing. A plurality of slit holes 40 are formed on the mating surfaces of the second member 38B and the third member 38C, and the first member (not shown).
[0071]
  FIG. 10 (B) shows the combination surface of the second member 38B, and the slit hole 40 is formed by grooving the combination surface from the inner inflow passage 35 toward the outside. In such a structure of the nozzle portion 38, for example, the angle of the slit hole 40 provided on the combination surface such as the second member 38B of FIG. 10B is set to an angle suitable for the high ceiling and the low ceiling. That's fine. Specifically, for the high ceiling, the inclination of the slit hole 40 may be a small angle with respect to the vertical direction, and for the low ceiling, a large angle may be used.
[0072]
  FIG. 11 is an explanatory view of a watering pattern in the operating state of the scanning head 9B according to the present invention shown in FIG. When the scanning head 9B according to the present invention installed on the ceiling surface is actuated by receiving a hot air current due to a fire, as shown in the drawing, the water for extinguishing water is discharged from the slit holes arranged at six locations around the nozzle portion 38 protruding. The water discharge pattern 60 is obtained by discharging water.
[0073]
  By the water discharge pattern 60 from the nozzle portion 38, rod-shaped spray patterns 61a and 61b directed in six directions are obtained in a predetermined protection range 62. At this time, the nozzle portion 38 receives the water flow caused by the water discharge and rotates the drive portion 36. Rotate in the direction of the arrow. As a result, each of the spray patterns 61a and 61b scans the protection range 62 at a low speed of about 1 rpm.
[0074]
  Since the slit holes 40 of the nozzle portion 38 are arranged in the vertical direction, the water discharge from the nozzle portion 38 is actually a spray pattern in which spot-like water discharge patterns are continuously arranged. When the water hits the surface to be extinguished, the spot-like watering pattern spreads by scattering and flowing through the surface to be extinguished, thereby forming a strip-shaped spraying pattern 61a in which the neighbors are connected.
[0075]
  In order to obtain the strip-shaped spray pattern 61a in this way, the nozzles that sprinkle away according to the installation height H of the slit holes 40 formed in the second member 38B and the third member 38C shown in FIG. The slit hole 40 on the upper side of the portion 38 forms a groove in the lateral direction, and the slit hole 40 on the lower side of the nozzle portion 38 that sprinkles water forms a groove in the downward direction. And the groove direction of each slit hole 40 is set so that it may be connected when a spot-like water spray pattern is sprinkled on a fire extinguishing target surface, and it will become strip | belt-shaped spray patterns 61a and 61b.
[0076]
  The advantage of this scanning head 9B is that a spray pattern is formed so that a certain part within the protection range is intensively sprayed, and the protection range is scanned, so that a large amount of fire is instantaneously produced. Since fire extinguishing water is sprayed, it has the advantage that a higher fire extinguishing capability can be obtained with a small amount of water discharge and water damage damage is small.
[0077]
  If the fire extinguishing capacity is the same as that of a closed head, the water pressure in the pipe can be reduced, the capacity of the aquarium pump and the like can be reduced, the pipe size can be further reduced, and a certain part within the protection range can be obtained. Since the nozzle part is formed to spray water intensively, the fire extinguishing ability can be maintained at the same level even if the protection range is wider than that of the closed head. As a result, the equipment cost can be reduced.
[0078]
  The scanning head 9B shown in FIGS. 8 to 11 also sets an ideal water discharge pattern with respect to the installation height as shown in FIG. 6 as in the case of the closed head shown in FIG. HtThe ideal watering distribution line Gx on the measured watering surface set to, is defined, and the characteristics shown in FIG. 7 are defined. By this, even if it is not actually installed on the high ceiling, it is scanned to the low conventional installation height. In the water discharge test in which the mold head 9B is installed, it is possible to perform a spraying performance test equivalent to the high ceiling installation state.
[0079]
  In addition, this invention is not limited to said embodiment, The appropriate deformation | transformation which does not impair the objective and advantage is included. The present invention is not limited by the numerical values shown in the above embodiments.
【The invention's effect】
[0080]
  As described above, the present inventionOf water discharge head for fire extinguishing equipmentAccording to the performance evaluation method, even if it is a head for a high ceiling, it is installed optimally from the state of the water discharge pattern in a water discharge test in a state where it is installed at a height of about 2 to 3 meters, for example. The height can be estimated, and it can be easily and reliably evaluated whether the head is for a high ceiling or a low ceiling.
[0081]
  Also, according to the present invention for existing headsWater discharge for fire extinguishing equipmentBy applying the head performance evaluation method, it is possible to evaluate the performance of whether it is for high ceilings or low ceilings in the same way, so that appropriate heads classified by performance evaluation according to the installation height can be installed, and the installation height Even if they are different from each other, the necessary amount of fire-fighting water can be reliably sprayed in almost the same water spray area.
[Brief description of the drawings]
[0082]
FIG. 1 is an explanatory diagram of a sprinkler fire extinguishing facility according to the present invention.
FIG. 2 is an explanatory diagram of a watering pattern with respect to the installation height of the head used in the present invention.
3 is a cross-sectional view of the closed head according to the present invention before and after operation. FIG.
FIG. 4 is an explanatory diagram of an embodiment of a low ceiling deflector and a high ceiling deflector used in FIG. 3;
5 is an explanatory diagram of another embodiment of a low ceiling deflector and a high ceiling deflector used in FIG. 3;
FIG. 6 is an explanatory diagram of ideal watering patterns and effective water discharge radii used in the performance evaluation method of the present invention.
7 is a characteristic diagram of installation height H with respect to effective water discharge radius R obtained based on FIG.
FIG. 8 is an explanatory diagram of a scanning head according to the present invention.
FIG. 9 is a sectional view of an operating state of a scanning sprinkler head according to the present invention.
FIG. 10 is a diagram for explaining the operation of the scanning head.
FIG. 11 is an explanatory diagram of a nozzle unit used in FIG.
[Explanation of symbols]
[0083]
1: Fire pump
4: Water supply main
6: Branch pipe
7: Flowing water detection device
8: Flowing water detection switch
9L: Low ceiling head
9H: Head for high ceiling
9A: Closed head
9B: Scanning head
9a-9e: Head
10: Floor surface
11: Terminal test valve
12: Orifice
15: Pump control panel
16: Sprinkler monitoring panel
18H, 18M, 18L: Water discharge pattern
20: Watering area
21: Head body
22: Valve body
23: Deflector
23L: Low ceiling deflector
23H: Deflector for high ceiling
24: Thermal decomposition section
28: Cutting
28a: Deep cutting
29: Slit hole
30: Standard water spray surface
31a-31e: Measurement watering surface
32: Nozzle body
34: Heat-sensitive operation mechanism
35: Inflow channel
36: Drive unit
37: Reduction gear (double planetary gear mechanism)
38: Nozzle part
38A to 38C: first to third members
40: slit hole

Claims (3)

In the performance evaluation method of the water discharge head for fire extinguishing equipment that evaluates the sprinkling performance against the installation height,
Set the ideal water discharge pattern to obtain the specified water spray amount in the water spray area of the specified radius on the water spray surface set to the specified height from the floor surface in response to changes in the head installation height, and the head installation position in the ideal water spray pattern To determine the sprinkling distribution at the measured sprinkling position lowered from the predetermined height from the ideal sprinkling distribution, defining the relationship between the installation height and the ideal sprinkling distribution,
Measure the water sprinkling distribution at the measurement sprinkling position that has fallen a predetermined height from the head installation position by the water discharge test of the head to be evaluated,
From the relationship between the head installation height and the ideal watering distribution , the actual watering distribution result at the measurement watering position of the evaluation target head is compared with the ideal watering distribution , and the watering performance is satisfied in the entire radius region. A method for evaluating the performance of a water discharge head for a fire extinguishing facility, wherein the head installation height corresponding to the ideal watering distribution is obtained as the installation height of the evaluation target head . In the performance evaluation method of the water discharge head for fire extinguishing equipment according to claim 1 ,
In the ideal water spray pattern, the upper surface of the measurement mass installed on the floor is set as the standard water spray surface with respect to the change in the installation height of the head, and the mass is measured in the water spray area with a specified radius of 2.6 meters on the standard water spray surface. A method for evaluating the performance of a water discharge head for a fire extinguishing facility , characterized in that the water discharge pattern provides a specified water spray amount or more. In the performance evaluation method of the water discharge head for fire extinguishing equipment according to claim 1 ,
The head to be evaluated, obtained installed fire extinguishing method for evaluating performance of the equipment for the water discharge head from a height and a high-ceiling, characterized in that the classification for low ceiling.

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