JP5340779B2 - Water spray equipment and operation method of water spray equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the drop of water from a spray nozzle when a spray by the spray nozzle is started and completed. <P>SOLUTION: This equipment for spraying water includes the spray nozzle 5 with a pressure-sensitive check valve for spraying water delivered via a first pipe line 4 from a high-pressure pump 2, a pressurizing tank 22 connected to the first pipe line 4 via a second pipe line 23, a first opening/closing valve 24 arranged at the upstream side in a water delivering direction relative to the spray nozzle 5 in the first pipe line 4, and at the downstream side in the water delivering direction relative to the connection position of the second pipe line 23, an expansion tank 27 connected to a third pipe line 3 connected to the entry side of the high-pressure pump 2 via a forth pipe line 26, and a second opening/closing valve 28 arranged in a fifth pipe line 29 connected to the first pipe line 4 at the downstream side in the water delivering direction relative to the first opening/closing valve 24, and at connected to the forth pipe line 26. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a water spray facility for lowering the ambient temperature using the latent heat of vaporization of mist sprayed in the air and a method for operating the water spray facility.

  In outdoor places where pavilions such as expositions are installed or indoors where large equipment with heat sources is installed, water spray equipment is used to lower the ambient temperature and the pump is pressurized to a predetermined pressure. Water is sprayed from a spray nozzle to generate mist, and the ambient temperature is lowered by the latent heat of vaporization of the mist.

  A conventional example of such a water spray facility is shown in FIG. In the figure, 1 is a water tank in which water W such as tap water is stored, 2 is a high-pressure pump that pressurizes and feeds water W supplied from the water tank 1 through a pipeline 3, and 4 is a high-pressure pump that is pressurized. 2 is a pipe through which water W sent from 2 is fed, 5 is a spray nozzle connected to a plurality of branch pipes 6 connected in parallel downstream of the pipe 4 in the water feeding direction, and 7 is a high-pressure pump 2. A check valve provided in the pipe line 4 in the vicinity of the outlet side, 8 is a safety valve connected to the pipe line 4 between the high pressure pump 2 and the check valve 7, and 9 is a tip on the downstream side in the water supply direction of the pipe line 4. This is an air vent valve provided.

  Details of the spray nozzle 5 used in the water spray facility of FIG. 8 are shown in FIG. Thus, the spray nozzle 5 includes a nozzle body 12 having a hollow portion 10 formed in the axial center portion and a small-diameter spray hole 11 communicating with the hollow portion 10 at the lower end, and an upper end of the nozzle body 12. The water supply passage 13 is formed in the shaft center portion and the filter 15 is fitted to the upper end portion of the water supply passage 13 and the spray hole 11 side. Is fitted in the hollow portion 10 so as to be located at the same position, and is accommodated in the hollow portion 10 so that the block 17 having a spiral groove 16 formed on the outer periphery and the water supply passage 13 of the plug 15 can be opened and closed. In the hollow portion 10 between the plug 15 and the block 17, the metal spherical valve body 18 and the valve body 18 can be biased toward the seat portion 15 a formed on the outer periphery of the water supply passage 13 at the lower end of the plug 15. Equipped with elastic body 19 such as coil springs To have. Thus, in the spray nozzle 5, a pressure sensitive check valve 20 for the water W is formed by the valve body 18 and the elastic body 19, and by adjusting the axial position of the plug 15 with respect to the hollow portion 10, The pressure of the water W sprayed from the spray hole 11 can be adjusted. The spray nozzle 5 is screwed to the lower end of the branch pipe 6 via the nozzle body 12. In the figure, 21 is a funnel-shaped slope at the lower end of the hollow portion 10.

  In the water spray facility shown in FIG. 8, when the high-pressure pump 2 is driven, the water W in the water tank 1 is introduced into the high-pressure pump 2 from the pipe 3 and pressurized by the high-pressure pump 2 to form the pipe 4 and the branch pipe. 6 is fed to the spray nozzle 5.

  The water W supplied to the spray nozzle 5 has fine dust removed by the filter 14, and reaches the valve body 18 through the water supply path 13. Thus, when the water pressure acting on the valve body 18 reaches a predetermined pressure (for example, 1 MPa) set by the deflection amount of the elastic body 19 adjusted in advance, the elastic body 19 resists the elastic force of the elastic body 19. The valve body 18 begins to open away from the seat portion 15 a, and the water W becomes a swirling flow from the water supply path 13 through the hollow portion 10 through the groove 16 of the block 17 and collides with the funnel-shaped slope 21 at the lower end of the hollow portion 10. The mist that spreads in a conical shape with the lower end outlet of the spray hole 11 passing through the spray hole 11 is started to the outside, and the ambient temperature is lowered by the latent heat of vaporization of the mist. The water pressure of water W during normal spraying is about 6 MPa.

  When the spraying is finished and the high-pressure pump 2 is stopped, the pressure from the pipe 4 to the spray nozzle 5 decreases, the spraying of the water W is stopped, and the pressure acting on the valve body 18 is the predetermined pressure (for example, 1 MPa). ), The valve body 18 urged by the elastic body 19 rises and comes into contact with the seat portion 15a. For this reason, the water supply path 13 is closed and the pressure-sensitive check valve 20 of the spray nozzle 5 is closed.

  In order to lower the ambient temperature indoors or outdoors, mist with a particle size of about 10 to 30 μm is generated by spraying water pressurized to about 6 MPa by a high pressure pump from the nozzle. Patent Document 1 is a water spray facility for lowering the ambient temperature.

  In Patent Document 1, a pump for pressurizing and feeding water, a main water pipe connected to the pump via a main valve, and a main valve connected to the main water pipe via a selection valve, the main water pipe and the spray head A sub-distribution pipe communicating with the main distribution pipe, a drain pipe connected to the main distribution pipe via a drain valve, and a drain pipe for draining the water in the main distribution pipe, connected to the sub-drain pipe via a spray header and an extension pipe Equipped with a spray nozzle.

  Thus, in Patent Document 1, at the start of spraying, the selection valve is closed, the main valve and the drain valve are opened, and then the pump is started. If it does so, the air which remained in the main distribution pipe will be extruded with water from a drain pipe, and a uniform water pressure will be applied in a main distribution pipe. Therefore, when the drain valve is closed, the water pressure in the main distribution pipe reaches a predetermined pressure (6 MPa). Next, the selection valve is opened, and water is supplied from the main water distribution pipe to the spray nozzle through the sub drain pipe, the spray header, and the extension pipe, and water is sprayed by the spray nozzle.

  At the end of spraying, when the drain valve is opened, the pressure of the spray nozzle is lowered and closed via the sub drain pipe. Therefore, after the drain valve is opened, the main valve and the drain valve are stopped with a slight delay.

JP 2006-177777 A

  In the water spray facility shown in FIG. 8, during steady operation, the pressure (water pressure) on the side of the spray nozzle 5 extending through the pipeline 4 due to the start and stop of the high pressure pump 2 is as shown in FIG. That is, when the high-pressure pump 2 is stopped, the pressure at the inlet portion of the spray nozzle 5 extends in the pipe line 4 between the water surface of the water W stored in the water tank 1 and the height of the spray nozzle 5. Although the water head pressure is based on the difference (for example, about 0.2 MPa), there is a time delay T1 for the discharge pressure of the high pressure pump 2 to become a predetermined pressure (about 6 MPa) after the operation of the high pressure pump 2 is started. Further, there is a time delay T2 for the discharge pressure of the high-pressure pump 2 to decrease to the original pressure (about 0.2 MPa) after the high-pressure pump 2 is stopped. Furthermore, when the pipeline 4 or the like is a high-pressure hose, the pipeline 4 or the like expands or contracts due to pressure fluctuations caused by the start and stop of the high-pressure pump 2. The time delays T1 and T2 increase in order for the pressure to increase to a predetermined pressure or to decrease to a predetermined pressure when stopped.

  On the other hand, when the high-pressure pump 2 is operated and the pressure acting on the valve body 18 of the pressure-sensitive check valve 20 in the spray nozzle 5 of FIG. 9 becomes a set pressure (for example, about 1 MPa), the valve body 18 opens. start. Thus, while the gap between the valve body 18 and the seat portion 15a of the plug 15 is small, the water W supplied through the groove 16 from the hollow portion 10 has a low water pressure and a low flow rate. The swirl flow is not formed, and as a result, the water W is not sprayed in the mist state from the spray hole 11 and drops as water droplets. Further, when the gap between the valve body 18 and the seat portion 15a of the plug 15 is increased and the water pressure is increased to a predetermined pressure, the water W does not drip from the spray hole 11 and has a conical shape with the lower end outlet of the spray hole 11 as a vertex. The spray that spreads over is started.

  Further, when the high pressure pump 2 is stopped, when the water pressure drops and falls below a predetermined pressure, the valve body 18 starts to close due to the elastic force of the elastic body 19, so that the valve body 18 and the seat 15a of the plug 15 When the gap becomes smaller and lower than the set pressure, the valve body 18 is completely closed. However, after the water pressure has dropped below a predetermined pressure, the water W remains until the valve body 18 is completely closed. Water droplets are dropped from the spray hole 11. In FIG. 10, times t <b> 1 and t <b> 2 are times during which the water W drops from the spray holes 11 of the spray nozzle 5 when the high-pressure pump 2 is operated and stopped.

  Thus, when water W is dripped without being sprayed from the spray nozzle 5 at the start and end of spraying, there is a possibility that the water drops may fall on people and wet the surroundings. In Patent Document 1, it is possible to prevent dripping of water when the high-pressure pump is stopped. However, when the sub-distribution pipe is long, it is difficult to sufficiently increase the pressure of the sub-distribution pipe at the start of operation. It is conceivable that this cannot be prevented.

  In view of the above-described circumstances, the present invention provides a water spray facility and water that can prevent dripping of water from the spray nozzle at the start or end of spraying by the spray nozzle, or at both the start and end. The purpose is to provide a method for operating the spray equipment.

The water spray equipment according to claim 1 of the present invention comprises:
A water tank which is an open tank for supplying spray water;
A spray nozzle having a pressure-sensitive check valve for spraying water sent from the pump through the first conduit;
A pressurized tank connected to the first conduit via a second conduit;
A first on-off valve provided upstream of the spray nozzle in the first pipe line in the water supply direction and downstream of the second pipe connection position in the water supply direction;
A hermetic expansion tank connected via a fourth line to a third line connected at one end to the inlet side of the pump and connected at the other end to the water tank;
A second on-off valve provided on a fifth pipe connected to the first pipe and connected to the fourth pipe on the downstream side in the water supply direction from the first on-off valve; It is provided.

The water spray facility according to claim 2 is:
A water tank which is an open tank for supplying spray water;
Comprising a plurality of spraying series capable of spraying water sent from a common pump for sucking sprayed water from the water tank via a third pipe ;
Each spray series is
A spray nozzle having a pressure-sensitive check valve for spraying water sent from the common pump through a first pipe branched through a sixth pipe;
A pressurized tank connected to the first conduit via a second conduit;
A first on-off valve provided upstream of the spray nozzle in the first pipe line in the water supply direction and downstream of the second pipe connection position in the water supply direction;
A third on-off valve provided on the upstream side in the water feeding direction from the connection position of the second pipe in the first pipe;
A closed expansion tank side connected via a fourth line to a third line connected to the inlet side of the common pump, and a first opening and closing in the first line of each spray series The downstream side in the water supply direction from the valve connection position is connected via a fifth pipe having a second on-off valve and a seventh pipe collecting the fifth pipe.

The water spray facility according to claim 3 is:
A water tank which is an open tank for supplying spray water;
Comprising a plurality of spraying series capable of spraying water sent from a common pump for sucking sprayed water from the water tank via a third pipe ;
Each spray series is
A spray nozzle having a pressure-sensitive check valve for spraying water sent from the common pump through the first pipe branched through the sixth pipe;
A pressurized tank connected to the first conduit via a second conduit;
A first on-off valve provided on the upstream side in the water supply direction with respect to the spray nozzle in the first pipe line and on the downstream side in the water supply direction with respect to the second pipe connection position;
A closed expansion tank side connected via a fourth line to a third line connected to the inlet side of the common pump, and a first opening and closing in the first line of each spray series The downstream side in the water supply direction from the valve connection position is connected via a fifth pipe having a second on-off valve and a seventh pipe collecting the fifth pipe.

The water spray equipment according to claim 4 is:
A water tank which is an open tank for supplying spray water;
Comprising a plurality of spraying series capable of spraying water sent from a common pump for sucking sprayed water from the water tank via a third pipe ;
Each spray series is
A spray nozzle having a pressure-sensitive check valve for spraying water sent from the common pump through the first pipe branched through the sixth pipe;
A pressurized tank connected to the sixth pipe line via a second pipe line;
A first on-off valve provided on the upstream side in the water feeding direction from the spray nozzle in the first pipeline,
A closed expansion tank side connected via a fourth line to a third line connected to the inlet side of the common pump, and a first opening and closing in the first line of each spray series The downstream side in the water supply direction from the valve connection position is connected via a fifth pipe having a second on-off valve and a seventh pipe collecting the fifth pipe.

The water spray equipment according to claim 5 is:
The pressure sensitive check valve of the spray nozzle includes an elastic body and a valve body that is pressed and closed by the elastic body, and the valve body is dragged by the hydraulic pressure from the first conduit. It is configured to open against.

In the operation method of the water spray equipment of claim 6,
When water spraying is started, a predetermined water pressure is accumulated in the pressurized tank in advance by the pump, then the first on-off valve is opened, and the water pressure and the pump accumulated in the pressurized tank by the pump By spraying the water pressure from, water spray is started by opening the pressure sensitive check valve of the spray nozzle instantly,
When ending the spraying of water, the pump is stopped, the first on-off valve is closed and the second on-off valve is opened, and the first on-off valve downstream of the first on-off valve installation position. By letting the pressure in the pipe line escape to the sealed expansion tank, the water pressure for the pressure sensitive check valve of the spray nozzle is suddenly lowered to a predetermined low pressure higher than atmospheric pressure, and the pressure sensitive check valve of the spray nozzle is instantly closed. Is.

In the operation method of the water spray equipment of claim 7,
When the spraying of water is terminated in a predetermined spraying series in which water spraying is performed among a plurality of spraying series, the first on-off valve and the third on-off valve of the series not spraying water are closed. In addition, the first on-off valve and the third on-off valve of the series that end spraying water while the common pump is in operation are closed, and the second on-off valve of the series is opened to open the first By letting the pipe line pressure escape to the sealed expansion tank, the water pressure for the pressure sensitive check valve of the spray nozzle is suddenly lowered to a predetermined low pressure higher than atmospheric pressure, and the pressure sensitive check valve for the spray nozzle is instantly closed. It is something to be made.

In the operation method of the water spray equipment of claim 8,
When water spraying is started in a predetermined spraying system among a plurality of spraying systems, the first on-off valve and the third on-off valve of the series not spraying water are closed and the common pump is operated. The second on-off valve of the series that starts spraying water in a closed state is closed and the third on-off valve and the first on-off valve of the series are opened to accumulate pressure in the pressurized tank of the series By applying the water pressure and the water pressure from the common pump, the spraying of water is started by opening the pressure sensitive check valve of the spray nozzle instantly,
When the spraying of water is terminated in the spraying series in which water is sprayed, the first on-off valve and the third on-off valve of the series not spraying water are closed, and the common pump Close the first on-off valve and the third on-off valve of the series that finishes spraying water in the operating state, and open the second on-off valve of the series to seal the pressure of the first pipe line By letting it escape to the expansion tank of the type, the water pressure with respect to the pressure sensitive check valve of the spray nozzle is suddenly lowered to a predetermined low pressure higher than the atmospheric pressure, and the pressure sensitive check valve of the spray nozzle is instantly closed.

In the operation method of the water spray equipment according to claim 9,
When spraying water in a predetermined spray sequence among a plurality of spray sequences, a predetermined water pressure is accumulated in advance in a pressurized tank of all spray sequences by a common pump, and the second of all spray sequences is stored. Open the first on-off valve of the spray series that starts spraying with the on-off valve closed, and apply the water pressure accumulated in the pressurized tank by the common pump and the water pressure from the common pump to instantly apply the spray series The spray nozzle is opened to start spraying water.

In the operation method of the water spray facility according to claim 10,
When the spraying of water in the spraying series that was spraying water among the plurality of spraying series is terminated, the first on-off valve of the spraying series that was spraying water is closed and the first of the spraying series is closed. Opening the second on-off valve and letting the pressure in the first pipeline downstream from the first on-off valve installation position to the water supply direction to the sealed expansion tank, the water pressure against the pressure sensitive check valve of the spray nozzle Is rapidly lowered to a predetermined low pressure higher than the atmospheric pressure, and the pressure- sensitive check valve of the spray nozzle is instantly closed.

In the operation method of the water spray equipment of claim 11,
When spraying water in a predetermined spray sequence among a plurality of spray sequences, a predetermined water pressure is accumulated in advance in a pressurized tank of all spray sequences by a common pump, and the second of all spray sequences is stored. Open the first on-off valve of the spray series that starts spraying with the on-off valve closed, and apply the water pressure accumulated in the pressurized tank by the common pump and the water pressure from the common pump to instantly apply the spray series Open the pressure-sensitive check valve of the spray nozzle and start spraying water,
When ending the spray of water, close the first on-off valve of the spray series that has been spraying water and open the second on-off valve of the spray series, from the first on-off valve installation position In addition, by letting the pressure in the first pipe line downstream in the water supply direction escape to the sealed expansion tank, the water pressure to the pressure- sensitive check valve of the spray nozzle is rapidly reduced to a predetermined low pressure higher than atmospheric pressure , and spraying is instantaneously performed. The pressure sensitive check valve of the nozzle is closed.

In the operation method of the water spray equipment according to claim 12,
When spraying water in a predetermined spray sequence among a plurality of spray sequences, a predetermined water pressure is accumulated in a pressurized tank in advance by a common pump, and the second on-off valves of all spray sequences are closed. Open the first open / close valve of the spray series that starts spraying and apply the water pressure accumulated in the pressurized tank by the common pump and the water pressure from the common pump to instantaneously feel the spray nozzle of the spray series. The pressure check valve is opened to start spraying water.

In the operation method of the water spray equipment according to claim 13,
When the spraying of water in the spraying series that was spraying water among the plurality of spraying series is terminated, the first on-off valve of the spraying series that was spraying water is closed and the first of the spraying series is closed. Opening the second on-off valve and letting the pressure in the first pipeline downstream from the first on-off valve installation position to the water supply direction to the sealed expansion tank, the water pressure against the pressure sensitive check valve of the spray nozzle Is rapidly lowered to a predetermined low pressure higher than the atmospheric pressure, and the pressure- sensitive check valve of the spray nozzle is instantly closed.

In the operation method of the water spray equipment according to claim 14,
When spraying water in a predetermined spray sequence among a plurality of spray sequences, a predetermined water pressure is accumulated in a pressurized tank in advance by a common pump, and the second on-off valves of all spray sequences are closed. Open the first open / close valve of the spray series that starts spraying and apply the water pressure accumulated in the pressurized tank by the common pump and the water pressure from the common pump to instantaneously feel the spray nozzle of the spray series. Open the pressure check valve and start spraying water,
When ending the spray of water, close the first on-off valve of the spray series that has been spraying water and open the second on-off valve of the spray series, from the first on-off valve installation position In addition, by letting the pressure in the first pipe line downstream in the water supply direction escape to the sealed expansion tank, the water pressure to the pressure- sensitive check valve of the spray nozzle is rapidly reduced to a predetermined low pressure higher than atmospheric pressure , and spraying is instantaneously performed. The pressure sensitive check valve of the nozzle is closed.

In the operation method for the water spray facility of claim 15,
When the water pressure in the first line is higher than a predetermined value, the pressure sensitive check valve of the spray nozzle opens against the resilience of the elastic body, and the water pressure in the first line Is lower than a predetermined value, the valve body is pressed by the elastic body to be closed.

  According to the inventions described in claims 1, 2, 3, 4, 6, 8, 11, and 14, it is possible to prevent water from dripping from the spray nozzle at the start of spraying and at the end of spraying. According to the inventions described in claims 9 and 12, it is possible to prevent water from dripping from the spray nozzle at the start of spraying. According to the inventions described in claims 7, 10, and 13, It is possible to prevent water from dripping from the spray nozzle at the end, and the pressure sensitive check valves of claims 5 and 15 can be applied to the inventions described in all the above claims.

It is a systematic diagram of Example 1 of the operating method of the water spray equipment and water spray equipment of this invention. 2A to 2F are timing charts of each device when water is sprayed by the water spray facility of FIG. It is a systematic diagram of Example 2 of the operating method of the water spray equipment and water spray equipment of this invention. 4A to 4F are timing charts of each device when water is sprayed by the water spray facility of FIG. It is a systematic diagram of Example 3 of the operation method of the water spray equipment and water spray equipment of the present invention. 6 (a) to 6 (e) are timing charts of each device when water is sprayed by the water spray facility of FIG. It is a systematic diagram of Example 4 of the operating method of the water spray equipment and water spray equipment of this invention. It is a systematic diagram of an example of the conventional water spray equipment. It is a longitudinal cross-sectional view of the spray nozzle used with the conventional water spray equipment and the water spray equipment of this invention. 10 is a graph showing the relationship between time and pressure when the spray nozzle shown in FIG. 9 performs spraying.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 and 2 show a first embodiment of the water spray facility and the operation method of the water spray facility according to the present invention, and are according to claims 1, 5, 6, and 15. FIG. In the figure, the same components as those in FIG. 8 are denoted by the same reference numerals. Further, the spray nozzle 5 has the same structure as that shown in FIG. 9 in all the embodiments described below. Furthermore, in the following description, in all the examples, the water supply direction refers to the water supply direction during water spraying, that is, the direction from the high-pressure pump 2 toward the spray nozzle 5. Furthermore, the same reference numerals are given to the same components in all the following embodiments.

  Thus, in the first embodiment, the first pipeline 4 has a branch pipeline downstream of the check valve 7 in the water feeding direction and on the most upstream side of the branch pipeline 6 in the water feeding direction. A pressurizing tank 22 that functions as an accumulator is connected via a second conduit 23 on the upstream side in the water supply direction from the connection position 6. Further, between the connection position A of the first pipeline 4 with respect to the second pipeline 23 and the connection position B of the branch pipeline 6 on the most upstream side in the water supply direction among the branch pipelines 6, the first An on-off valve 24 is provided.

  An expansion tank 27 that functions as an accumulator is provided between the backflow prevention mechanism 25 and the high-pressure pump 2 via the fourth pipe 26 in the third pipe 3 that connects the water tank 1 and the high-pressure pump 2. Connected to the first pipeline 4, the connection position of the branch pipeline 6 on the downstream side in the water supply direction from the installation position of the first on-off valve 24 and on the upstream side of the branch pipeline 6 in the water supply direction A fifth pipe 29 having a second on-off valve 28 is connected in the middle of the connection position C, which is upstream of the water supply direction from B, and the tip of the fifth pipe 29 is the fourth pipe. 26. In the figure, reference numeral 30 denotes a controller, and when the controller 30 is operated under a condition where the humidity is below a certain humidity or above a certain temperature, an appropriate command for starting and stopping the high-pressure pump 2 and the first on-off valve 24, A command for opening and closing the second on-off valve 28 can be output, and a schedule operation is performed by a timer.

Next, the operation of the first embodiment will be described with reference to FIGS. 2 (a) to 2 (f) and FIG.
When spraying water W from the spray nozzle 5, the first on-off valve 24 and the second on-off valve 28 are closed (i in FIG. 2 (b), ii in FIG. 2 (c)). The high-pressure pump 2 is started (see iii in FIG. 2A). For this reason, the water W in the water tank 1 is introduced into the high-pressure pump 2 from the third pipe 3, pressurized, and sent to the first pipe 4. Thus, since the first on-off valve 24 and the second on-off valve 28 are closed, the water W is located downstream of the first on-off valve 24 in the first pipeline 4 and the fifth pipe. As a result, the water is supplied from the second pipe 23 to the pressurized tank 22 at the start of the first operation or at the start of the operation after the maintenance. Is accumulated for a predetermined time from low pressure to a predetermined pressure (see iv in FIG. 2D). At this time, the water pressure accumulated in the pressurized tank 22 is about 6 MPa. Further, the portion of the first pipe line 4 on the upstream side in the water supply direction from the first on-off valve 24 has substantially the same water pressure as that of the pressurized tank 22.

  Thus, when a predetermined time has elapsed after the high-pressure pump 2 is started and the pressure tank 22 is accumulated at a predetermined pressure (see v in FIG. 2D), the first on-off valve 24 (See vi of FIG. 2B), the water pressure from the high-pressure pump 2 and the water pressure accumulated in the pressurizing tank 22 are in the direction of water supply from the first on-off valve 24 in the first pipeline 4. From the upstream side, it instantaneously acts on the inlet side of the spray nozzle 5 through the first pipe line 4 on the downstream side in the water supply direction from the first on-off valve 24 (see vii in FIG. 2 (f)). For this reason, the valve body 18 shown in FIG. 9 of the spray nozzle 5 opens instantaneously, and the spray of water W is started as mist without dripping from the spray nozzle 5. Further, when the high-pressure pump 2 is operated, the suction pressure of the high-pressure pump 2 acts on the expansion tank 27 via the pipe line 26. As a result, the pressure in the expansion tank 27 decreases, so that the expansion tank 27 has a low pressure. (For example, about 0.2 MPa) (see viii in FIG. 2 (e)).

  When spraying is completed and the high-pressure pump 2 is stopped (see ix in FIG. 2A), the first opening / closing valve 24 is closed (see x in FIG. 2B), and then the second opening / closing valve. 28 opens (see xi in FIG. 2 (c)). For this reason, the water pressure in the first pipe line 4 on the downstream side in the water supply direction from the first on-off valve 24 escapes instantaneously to the expansion tank 27 through the fifth pipe line 29 and is accumulated in the expansion tank 27 ( The pressure in the first pipeline 4 and the branch pipeline 6 on the downstream side in the water supply direction from the first on-off valve 24 decreases. At this time, the pressure accumulated in the expansion tank 27 and the water pressure on the spray nozzle 5 entry side is about 0.5 MPa lower than 1 MPa which is a pressure at which the valve body 18 starts to open. As a result, the water pressure acting on the valve element 18 of the spray nozzle 5 is instantaneously lowered (see xiii in FIG. 2 (f)), and the valve element 18 of the spray nozzle 5 is instantaneously closed by the elastic body 19. For this reason, in Example 1, water does not dripped from the spray nozzle 5 even at the end of spraying.

  Further, when the high-pressure pump 2 is stopped, the first on-off valve 24 is closed, so that the pressure does not decrease from the check valve 7 to the first on-off valve 24 of the first pipe line 4, and as a result The pressure in the pressurized tank 22 from the second pipe 23 is also maintained at a high pressure without decreasing over time (see xiv in FIG. 2D). Therefore, from the second spray of water after the start of operation or maintenance, when the high-pressure pump 2 is started, a predetermined water pressure is accumulated in the pressurized tank 22 (xv in FIG. 2D). reference). As a result, the time for accumulating pressure in the pressurized tank 22 is omitted, and the first on-off valve 24 can be opened as soon as the high-pressure pump 2 is started. Can be started quickly. Thus, according to the illustrated example, the water W can be prevented from dripping from the spray nozzle 5 at the start and end of spraying of the water W.

  3 and 4 show a second example of the operation of the water spray facility and the water spray facility according to the present invention, and are according to claims 2, 5, 7, 8, and 15. Thus, in the second embodiment, a plurality of series of spray nozzles 5, pressurized tanks 22, first on-off valves 24, second on-off valves 28, and controllers 30 of the water spray equipment of FIG. 1 are provided. Is provided with a third on-off valve 31 and water spray equipment is arranged in parallel as a first spray series, a second spray series,...

  Further, in Example 2, the system of the water tank 1, the third pipe 3, the backflow prevention mechanism 25, the high pressure pump 2, and the check valve 7 are arranged in the same manner as in each of the above embodiments, and are in a series. It is commonly used in any operation of the first spray series, the second spray series, ... the Nth spray series. Thus, the sixth pipe line 4a connected to the discharge side of the high-pressure pump 2, which is a common pump for all series, is branched on the outlet side of the high-pressure pump 2, and in this example, it is divided into three series. Each first pipe 4 divided and connected in parallel to the sixth pipe 4a is provided with a third on-off valve 31 and a first on-off valve 24 sequentially from the upstream side to the downstream side in the water supply direction. The spray nozzle 5 is connected to the downstream side of the first on-off valve 24 of each first pipe line 4 via a plurality of branch pipes 6 connected in parallel.

  A pressurized tank 22 is connected between the third on-off valve 31 and the first on-off valve 24 in the first pipe line 4 of each spray series via the second pipe line 23. A fifth pipe 29 having a second opening / closing valve 28 in the middle is connected to the downstream side of the water supply direction during water spraying from the connection part of the first opening / closing valve 24 in the pipe 4. The fifth pipe 29 is joined to the seventh pipe 29a on the outlet side of the second on-off valve 28, and the seventh pipe 29a is a fourth pipe provided with an expansion tank 27 at the tip. The pipe 26 is connected to the third pipe 3 on the entrance side of the high-pressure pump 2. Further, as shown in FIG. 3, the expansion tank 27 is provided on the high-pressure pump 2 side, and is directly connected to the end of the seventh pipe 29a on the water spray equipment side of the series separated from the high-pressure pump 2. To do.

  Reference numeral 32 denotes a pressure control valve connected to the middle portion of the pipe line 33 connecting the sixth pipe line 4a and the seventh pipe line 29a. Further, reference numeral 34 denotes a controller, which gives a start command to the high-pressure pump 2 when the water spray equipment is operated in any of the series, and the high-pressure pump when not spraying water in all the series. 2 can be given a stop command, and when a start / stop command is output to the high-pressure pump 2, a command to that effect can be given to the controller 30 in each series of water spray equipment. It has become.

  In addition, the controller 30 opens and closes the first on-off valve 24, the second on-off valve 28, and the third on-off valve 31 as appropriate during operation performed under conditions of a certain humidity or a certain temperature. A command can be output, and a schedule operation is performed by a timer.

  Next, the operation of the second embodiment will be described with reference to FIGS. 4 (a) to 4 (f) and FIG. In the illustrated example, when water W is sprayed in any spray series, the high-pressure pump 2 that is a common pump is continuously operated without stopping.

  For example, when water W is sprayed in the first spray series of water spray equipment, and water W is not sprayed in the second spray series,... Also in the spray equipment, the third on-off valve 31, the first on-off valve 24, and the second on-off valve 28 are initially closed. Also, in the second spray series,... Nth spray series water spray equipment, the third on-off valve 31, the first on-off valve 24, and the second on-off valve 28 are all closed.

  Thus, when the third on-off valve 31 is opened in the first series (see xvi in FIG. 4C), the water W introduced from the water tank 1 through the third pipe 3 to the high-pressure pump 2 is Pressurized and sent from the high-pressure pump 2 to the sixth pipeline 4a, fed from the sixth pipeline 4a to the first pipeline 4 of the first spray series, and from the first pipeline 4 to the second pipeline 4a. The pressure is accumulated in the pressurized tank 22 through the pipe line 23. At the start of the first operation or after the maintenance, the water pressure accumulated in the pressurized tank 22 is accumulated over a predetermined time until the pressure reaches a predetermined pressure from the low pressure (see xvii in FIG. 4D).

  Thus, since the first on-off valve 24 opens when a predetermined pressure is accumulated in the pressure tank 22 (see xviii in FIG. 4A), the water W from the high-pressure pump 2 and the pressure that has been accumulated. The water pressure of the water W from the tank 22 instantaneously acts on the inlet side of the spray nozzle 5 from the first conduit 4 and the branch conduit 6 (see xix in FIG. 4 (f)), and the valve body of the spray nozzle 5. 18 opens instantly. For this reason, the water W is sprayed as mist without dripping from the spray nozzle 5. Further, when the high-pressure pump 2 is operated, the suction pressure of the high-pressure pump 2 is supplied to the two expansion tanks via the fourth pipeline 26 or the fourth pipeline 26 and the seventh pipeline 29a. As a result, the pressure in the expansion tank 27 decreases, and as a result, the pressure in the expansion tank 27 becomes low (for example, about 0.2 MPa) (see xx in FIG. 4E).

  When spraying is completed, the first on-off valve 24 and the third on-off valve 31 are closed (see xxi in FIG. 4A and xxii in FIG. 4C), and the second on-off valve 28 is opened (see FIG. 4). 4 (b) xxiii). For this reason, in the first spray series, the water pressure in the water supply direction downstream of the first on-off valve 24 of the first pipe 4 and the water pressure in the branch pipe 6 are instantaneously lowered, and the fifth pipe 29 Then, pressure is accumulated in the expansion tank 27 from the seventh pipe line 29a (see xxiv in FIG. 4E). As a result, the water pressure acting on the inlet side of the valve body 18 of the spray nozzle 5 is instantaneously lowered (see xxv in FIG. 4 (f)), and the valve body 18 of the spray nozzle 5 is instantaneously closed by the elastic body 19. . For this reason, in this embodiment, water does not drip from the spray nozzle 5 even at the end of spraying. When the valve element 18 of the spray nozzle 5 is closed and a predetermined time has elapsed, the second on-off valve 28 is also closed (see xxvi in FIG. 4B).

  At the end of spraying, the first on-off valve 24 and the third on-off valve 31 are closed, so that the water pressure in the pressurizing tank 22 does not decrease and maintains a high pressure state (xxvii in FIG. 4D). reference). For this reason, in the case of the second and subsequent injections of water after the start of operation or after maintenance, the pressurization tank 22 can be started to operate in the accumulated state (see xxviii in FIG. 4D). As a result, the time for accumulating pressure in the pressurized tank 22 is omitted, and water spray from the spray nozzle 5 can be started quickly. Thus, according to the illustrated example, the water W can be prevented from dripping from the spray nozzle 5 at the start and end of spraying of the water W.

  In the second embodiment, the case where the spraying is performed by the water spraying equipment of the first spraying system has been described. However, the spraying can be performed by the water spraying equipment of a plurality of systems at the same time. In this case, the operation is performed as in the case of the above-described first spray series. Further, for example, in the case of the water spray facility shown in FIG. 3, the N-th spray series water spray facility is close to the expansion tank 27 shown on the right side of the drawing, and the water pressure is shorter than that on the right side of the expansion tank 27. Since the pressure is propagated over time, the water pressure of the Nth spray series is absorbed by the expansion tank 27 shown on the right side of the drawing at the end of spraying, and the spray from the spray nozzle 5 also in the Nth spray series. The dripping of the water W can be reliably prevented.

  When the sprayed series is small and the water W discharged from the high-pressure pump 2 to the sixth pipe 4a is excessive, the water W passes through the pressure regulating valve 32 and the pipe 33, the seventh pipe. Returned from the path 29a and the fourth pipeline 26 to the third pipeline 3 side.

  5 and FIG. 6 are Embodiment 3 of the water spray equipment and the method of operating the water spray equipment of the present invention, and are modifications of the embodiment shown in FIG. 3, and claims 3, 5, 9, 10, 11, 15. In the figure, the same components as those in FIG. 3 are denoted by the same reference numerals.

  Thus, the feature of the third embodiment is that in the second embodiment of FIG. 3 described above, the second pipe connected to the pressurized tank 22 is connected to the first pipeline 4 of each spray series. In contrast to the third on-off valve 31 provided upstream of the connection position A of the passage 23 with respect to the first pipeline 4 in the water supply direction, in the third embodiment, any of the first pipelines 4 is provided. In contrast, the third on-off valve 31 is not provided, and the other points are the same as those of the second embodiment of FIG.

  Next, the operation of the third embodiment will be described with reference to FIGS. 6 (a) to 6 (e) and FIG. For example, before the start of the first operation or before the start of maintenance, the high-pressure pump 2 is stopped and the first on-off valve 24 and the second on-off valve 28 are closed in all spray series. In addition, the pressurized tanks 22 of all spray series are in a low pressure state.

  Thus, when the high-pressure pump 2 is started at the start of the first operation or at the start of the operation after maintenance, the water W discharged from the high-pressure pump 2 passes through the sixth pipeline 4a to the first of all spray series. Therefore, in all the series, the water W is fed from the first pipeline 4 to the pressurized tank 22 via the second pipeline 23, and pressure accumulation is started. The water pressure accumulated in the pressurized tank 22 when the high-pressure pump 2 is started is accumulated over a predetermined time until reaching a predetermined pressure from the low pressure (see xxix in FIG. 6C). The high-pressure pump 2 is continuously driven without stopping while spraying in any spray series.

  When a predetermined water pressure is accumulated in the pressurization tank 22, a predetermined spray series for spraying water, for example, the first on-off valve 24 of the first spray series is opened (see xxx in FIG. 6A). Then, the water pressure of the water W from the high-pressure pump 2 and the water pressure accumulated in the pressurized tanks 22 of all the spray series are instantaneously the first spray series in which the first on-off valve 24 of the spray series is opened. Therefore, the valve element 18 of the spray nozzle 5 opens instantaneously, and the water W is sprayed as mist without dripping from the spray nozzle 5. Be started.

  Further, when the operation of the high-pressure pump 2 is started, the suction pressure of the high-pressure pump 2 is changed to two through the fourth pipe 26, the fourth pipe 26, and the seventh pipe 29a. As a result of acting on the expansion tank 27, the pressure in each expansion tank 27 is reduced, resulting in a low pressure (for example, about 0.2 Mpa) in the expansion tank 27 (see xxxii in FIG. 6D).

  When spraying is completed in the first spray series, the first on-off valve 24 of the series is closed (see xxxiii in FIG. 6A). Further, when the first on-off valve 24 is closed, the second on-off valve 28 of the first spray series is opened (see xxxiv in FIG. 6B). For this reason, in the first spraying series, the water pressure of the water W on the downstream side in the water supply direction from the connection position of the first on-off valve 24 of the branch pipe 6 and the first pipe 4 is instantaneously lowered to the fifth level. Pressure is accumulated in the expansion tank 27 from the pipe line 29 and the seventh pipe line 29a or from the fifth pipe line 29, the seventh pipe line 29a and the fourth pipe line 26 (FIG. 6D). Xxxv). As a result, the water pressure acting on the inlet side of the valve body 18 of the spray nozzle 5 is instantaneously lowered (see xxxvi in FIG. 6 (e)), and the valve body 18 of the spray nozzle 5 is instantaneously closed by the elastic body 19. . For this reason, also in Example 3, water does not dripped from the spray nozzle 5 at the end of spraying. When the valve element 18 of the spray nozzle 5 is closed, the second on-off valve 28 is also closed (see xxxvii in FIG. 6B).

  When the high-pressure pump 2 is started, the high-pressure pump 2 is continuously operated until the spraying of water in all spray series is completed. The pressure tank 22 is in the accumulated state (see xxxviii in FIG. 6C).

  FIG. 7 is a fourth embodiment of the water spraying facility and the method of operating the water spraying facility according to the present invention, which is a modification of the third embodiment shown in FIG. 5, and includes claims 4, 5, 12, 13, 14 and 15. It is concerned. In the figure, the same components as those in FIG.

  Thus, in the third embodiment of FIG. 5 described above, the third on-off valve 31 is not provided for the first pipe line 4 in all the spray lines, but in all the spray lines. The pressurized tank 22 is connected to the first pipeline 4a via the second pipeline 23. However, in the fourth embodiment, as in the case of FIG. 5, the third on-off valve 31 is not provided for the first pipeline 4 in all the spray lines, and at the same time, The second pipeline 23 and the pressurized tank 22 are removed from the first pipeline 4, and the position close to the first spray line on the downstream side in the water feeding direction from the pipeline 33 connection position of the sixth pipeline 4a, And on the Nth spray line side that is farthest from the high-pressure pump 2 side of the sixth pipeline 4a, the second pipeline 23 connected to the sixth pipeline 4a and the second pipeline 23 are connected. A pressurizing tank 22 is provided.

  The timing of opening and closing the first on-off valve 24 and the second on-off valve 28 during the spraying of water W in such a configuration is the same as in the case of FIG. 6, and the pressurized tank 22 and the expansion tank associated therewith The change state of the pressure 27 and the change state of the pressure on the inlet side of the spray nozzle 5 are the same as in FIG. Thus, also in this embodiment, dripping of water from the spray nozzle 5 can be prevented at both the start and end of spraying of the water W.

  In the third and fourth embodiments, the case where the spraying is performed by the water spraying equipment of the first spraying system has been described. However, the spraying can be performed by the water spraying equipment of a plurality of systems at the same time. In that case, the opening and closing of the first and second on-off valves are performed in all the spray systems that perform spraying.

  In the embodiment of the present invention, the illustrated expansion tank 27 is a hermetically sealed tank, but it can also be implemented as an open tank whose inside is open to the atmosphere (in this case, water supply from the water tank 1). Since the pressure is about 0.2 MPa, the height from the inner peripheral bottom of the pipe line 3 to the open tank water surface is about 20 m.) In addition, various changes can be made without departing from the scope of the present invention. Of course, it can be added.

1 Water tank 2 High-pressure pump (pump) (common pump)
DESCRIPTION OF SYMBOLS 3 3rd pipe line 4 1st pipe line 4a 6th pipe line 5 Spray nozzle 18 Valve body 19 Repellent body 20 Pressure sensitive check valve 22 Pressurization tank 23 2nd pipe line 24 1st on-off valve 26 Fourth Pipe 27 Expansion Tank 28 Second Opening Valve 29 Fifth Pipe 29a Seventh Pipe 31 Third Opening Valve W Water A Connection Position

Claims (15)

A water tank which is an open tank for supplying spray water;
A spray nozzle having a pressure-sensitive check valve for spraying water sent from the pump through the first conduit;
A pressurized tank connected to the first conduit via a second conduit;
A first on-off valve provided upstream of the spray nozzle in the first pipe line in the water supply direction and downstream of the second pipe connection position in the water supply direction;
A hermetic expansion tank connected via a fourth line to a third line connected at one end to the inlet side of the pump and connected at the other end to the water tank;
A second on-off valve provided on a fifth pipe connected to the first pipe and connected to the fourth pipe on the downstream side in the water supply direction from the first on-off valve; A water spray facility characterized by comprising. A water tank which is an open tank for supplying spray water;
Comprising a plurality of spraying series capable of spraying water sent from a common pump for sucking sprayed water from the water tank via a third pipe ;
Each spray series is
A spray nozzle having a pressure-sensitive check valve for spraying water sent from the common pump through a first pipe branched through a sixth pipe;
A pressurized tank connected to the first conduit via a second conduit;
A first on-off valve provided upstream of the spray nozzle in the first pipe line in the water supply direction and downstream of the second pipe connection position in the water supply direction;
A third on-off valve provided on the upstream side in the water feeding direction from the connection position of the second pipe in the first pipe;
A closed expansion tank side connected via a fourth line to a third line connected to the inlet side of the common pump, and a first opening and closing in the first line of each spray series The downstream side of the water supply direction with respect to the valve connection position is connected via a fifth pipe having a second on-off valve and a seventh pipe collecting the fifth pipe. Water spray equipment. A water tank which is an open tank for supplying spray water;
Comprising a plurality of spraying series capable of spraying water sent from a common pump for sucking sprayed water from the water tank via a third pipe ;
Each spray series is
A spray nozzle having a pressure-sensitive check valve for spraying water sent from the common pump through the first pipe branched through the sixth pipe;
A pressurized tank connected to the first conduit via a second conduit;
A first on-off valve provided on the upstream side in the water supply direction with respect to the spray nozzle in the first pipe line and on the downstream side in the water supply direction with respect to the second pipe connection position;
A closed expansion tank side connected via a fourth line to a third line connected to the inlet side of the common pump, and a first opening and closing in the first line of each spray series The downstream side of the water supply direction with respect to the valve connection position is connected via a fifth pipe having a second on-off valve and a seventh pipe collecting the fifth pipe. Water spray equipment. A water tank which is an open tank for supplying spray water;
Comprising a plurality of spraying series capable of spraying water sent from a common pump for sucking sprayed water from the water tank via a third pipe ;
Each spray series is
A spray nozzle having a pressure-sensitive check valve for spraying water sent from the common pump through the first pipe branched through the sixth pipe;
A pressurized tank connected to the sixth pipe line via a second pipe line;
A first on-off valve provided on the upstream side in the water feeding direction from the spray nozzle in the first pipeline,
A closed expansion tank side connected via a fourth line to a third line connected to the inlet side of the common pump, and a first opening and closing in the first line of each spray series The downstream side of the water supply direction with respect to the valve connection position is connected via a fifth pipe having a second on-off valve and a seventh pipe collecting the fifth pipe. Water spray equipment.   The pressure sensitive check valve of the spray nozzle includes an elastic body and a valve body that is pressed and closed by the elastic body, and the valve body is dragged by the hydraulic pressure from the first conduit. The water spray equipment according to any one of claims 1 to 4, wherein the water spray equipment is configured to open against the water. A method for operating the water spray facility according to claim 1,
When water spraying is started, a predetermined water pressure is accumulated in the pressurized tank in advance by the pump, then the first on-off valve is opened, and the water pressure and the pump accumulated in the pressurized tank by the pump By spraying the water pressure from, water spray is started by opening the pressure sensitive check valve of the spray nozzle instantly,
When ending the spraying of water, the pump is stopped, the first on-off valve is closed and the second on-off valve is opened, and the first on-off valve downstream of the first on-off valve installation position. By letting the pressure in the pipe line escape to the sealed expansion tank, the water pressure for the pressure sensitive check valve of the spray nozzle is suddenly lowered to a predetermined low pressure higher than atmospheric pressure, and the pressure sensitive check valve of the spray nozzle is instantly closed. The operation method of the water spraying equipment characterized by this. A method for operating the water spray facility according to claim 2,
When the spraying of water is terminated in a predetermined spraying series in which water spraying is performed among a plurality of spraying series, the first on-off valve and the third on-off valve of the series not spraying water are closed. In addition, the first on-off valve and the third on-off valve of the series that end spraying water while the common pump is in operation are closed, and the second on-off valve of the series is opened to open the first By letting the pipe line pressure escape to the sealed expansion tank, the water pressure for the pressure sensitive check valve of the spray nozzle is suddenly lowered to a predetermined low pressure higher than atmospheric pressure, and the pressure sensitive check valve for the spray nozzle is instantly closed. A method of operating a water spray facility characterized in that A method for operating the water spray facility according to claim 2,
When water spraying is started in a predetermined spraying system among a plurality of spraying systems, the first on-off valve and the third on-off valve of the series not spraying water are closed and the common pump is operated. The second on-off valve of the series that starts spraying water in a closed state is closed and the third on-off valve and the first on-off valve of the series are opened to accumulate pressure in the pressurized tank of the series By applying the water pressure and the water pressure from the common pump, the spraying of water is started by opening the pressure sensitive check valve of the spray nozzle instantly,
When the spraying of water is terminated in the spraying series in which water is sprayed, the first on-off valve and the third on-off valve of the series not spraying water are closed, and the common pump Close the first on-off valve and the third on-off valve of the series that finishes spraying water in the operating state, and open the second on-off valve of the series to seal the pressure of the first pipe line Water that is rapidly reduced to a predetermined low pressure higher than atmospheric pressure by letting it escape to an expansion tank of the type, and instantly closes the pressure sensitive check valve of the spray nozzle How to operate the spray equipment. A method for operating the water spray facility according to claim 3,
When spraying water in a predetermined spray sequence among a plurality of spray sequences, a predetermined water pressure is accumulated in advance in a pressurized tank of all spray sequences by a common pump, and the second of all spray sequences is stored. Open the first on-off valve of the spray series that starts spraying with the on-off valve closed, and apply the water pressure accumulated in the pressurized tank by the common pump and the water pressure from the common pump to instantly apply the spray series A method for operating a water spraying facility, characterized in that the spraying of water is started by opening the pressure sensitive check valve of the spray nozzle. The operation method of the water spray equipment according to claim 3, wherein when spraying water is terminated in a spray system in which water is sprayed among a plurality of spray systems, the water spray is performed. The first on-off valve of the series is closed and the second on-off valve of the spray series is opened, and the pressure in the first pipeline downstream in the water supply direction from the first on-off valve installation position is sealed expansion Water spray equipment characterized in that the water pressure against the pressure sensitive check valve of the spray nozzle is suddenly lowered to a predetermined low pressure higher than atmospheric pressure by letting it escape to the tank, and the pressure sensitive check valve of the spray nozzle is instantly closed. Driving method. A method for operating the water spray facility according to claim 3,
When spraying water in a predetermined spray sequence among a plurality of spray sequences, a predetermined water pressure is accumulated in advance in a pressurized tank of all spray sequences by a common pump, and the second of all spray sequences is stored. Open the first on-off valve of the spray series that starts spraying with the on-off valve closed, and apply the water pressure accumulated in the pressurized tank by the common pump and the water pressure from the common pump to instantly apply the spray series Open the pressure-sensitive check valve of the spray nozzle and start spraying water,
When ending the spray of water, close the first on-off valve of the spray series that has been spraying water and open the second on-off valve of the spray series, from the first on-off valve installation position In addition, by letting the pressure in the first pipe line downstream in the water supply direction escape to the sealed expansion tank, the water pressure to the pressure- sensitive check valve of the spray nozzle is rapidly reduced to a predetermined low pressure higher than atmospheric pressure , and spraying is instantaneously performed. A method for operating a water spray facility, characterized in that a pressure-sensitive check valve of a nozzle is closed. An operation method of the water spray facility according to claim 4,
When spraying water in a predetermined spray sequence among a plurality of spray sequences, a predetermined water pressure is accumulated in a pressurized tank in advance by a common pump, and the second on-off valves of all spray sequences are closed. Open the first open / close valve of the spray series that starts spraying and apply the water pressure accumulated in the pressurized tank by the common pump and the water pressure from the common pump to instantaneously feel the spray nozzle of the spray series. A method of operating a water spraying facility, characterized by opening a pressure check valve and starting spraying of water. An operation method of the water spray facility according to claim 4,
When the spraying of water in the spraying series that was spraying water among the plurality of spraying series is terminated, the first open / close valve of the spraying series that was spraying water is closed and the first of the spraying series is closed. Opening the second on-off valve and letting the pressure in the first pipeline downstream from the first on-off valve installation position to the water supply direction to the sealed expansion tank, the water pressure against the pressure sensitive check valve of the spray nozzle The water spray equipment operating method is characterized in that the pressure sensitive check valve of the spray nozzle is instantly closed by rapidly lowering the pressure to a predetermined low pressure higher than the atmospheric pressure . An operation method of the water spray facility according to claim 4,
When spraying water in a predetermined spray sequence among a plurality of spray sequences, a predetermined water pressure is accumulated in a pressurized tank in advance by a common pump, and the second on-off valves of all spray sequences are closed. Open the first open / close valve of the spray series that starts spraying and apply the water pressure accumulated in the pressurized tank by the common pump and the water pressure from the common pump to instantaneously feel the spray nozzle of the spray series. Open the pressure check valve and start spraying water,
When ending the spray of water, close the first on-off valve of the spray series that has been spraying water and open the second on-off valve of the spray series, from the first on-off valve installation position In addition, by letting the pressure in the first pipe line downstream in the water supply direction escape to the sealed expansion tank, the water pressure to the pressure- sensitive check valve of the spray nozzle is rapidly reduced to a predetermined low pressure higher than atmospheric pressure , and spraying is instantaneously performed. A method for operating a water spray facility, characterized in that a pressure-sensitive check valve of a nozzle is closed. When the water pressure in the first line is higher than a predetermined value, the pressure sensitive check valve of the spray nozzle opens against the resilience of the elastic body, and the water pressure in the first line The method of operating a water spraying facility according to any one of claims 6 to 14, wherein when the pressure is lower than a predetermined value, the valve body is pressed by the elastic body to be closed.

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