JP4468085B2 - Sprinkler - Google Patents

Description

  The present invention is suitable for use in preventing the generation of harmful dust such as dirt and asbestos, and the generation of bad odors by spraying water on, for example, construction sites where buildings and houses are dismantled, and also in a garbage disposal site. It relates to a watering device.

Not only in building demolition sites, but also in general house demolition sites, fragments of concrete, dust accumulated over many years, and harmful substances such as asbestos are scattered over a wide range. These dusts are not only harmful to workers but also harmful to the surrounding residents.
Therefore, a large amount of water was sprinkled on the construction site to prevent generation of dust and dust. In addition, the said watering is performed similarly in a refuse disposal site etc.

The objects of demolition work vary widely, and there may be general houses as mentioned above, or low-rise buildings of about 5-6F. Moreover, a high-rise building of about 10-20F may be demolished.
In the case of dismantling a low-rise building, conventionally, water was sprayed using a low-pressure sprinkler. The low-pressure water sprinkler has a structure in which a pump having a water pressure of about 0 to 8 kg / cm ² and a relatively large amount of water is incorporated. Sprinkle a large amount of water at the demolition site to prevent dust generation.

On the other hand, when dismantling a high-rise building, conventionally, water was sprayed using a high-pressure sprinkler. The high-pressure watering device has a structure in which a pump having a water pressure of about 0 to about 30 kg / cm ² is incorporated, but the amount of water in the pump is small. However, since the water pressure is high, the hose diameter, watering nozzle diameter, etc. are both small for high pressure, and it is impossible to circulate a large flow of water. Watered.
However, when considered as a pressure pump, by using a pressure benefits of 30kg / cm ^2, it is possible to feed water to the demolition of the building of about 10F~20F, are those convenient.

As described above, conventionally, a low-pressure water spray device and a high-pressure water spray device are prepared and used in accordance with the site where the dismantling work is performed. However, preparing two types of watering devices is not preferable in terms of storage and maintenance.
As a method for solving such a problem, it is conceivable that both are incorporated in one housing to form one watering device. However, in a configuration in which two high-pressure pumps and a low-pressure pump are incorporated, a piping system and electrical equipment are required for each, which increases the size of the entire device and increases the weight. Therefore, the transportation to the construction site becomes large, and the maintenance becomes troublesome and the usability becomes worse.
In addition, the watering device connects the watering nozzle to the discharge port via a hose, but the discharge port is distinguished between high pressure and low pressure, and is not compatible. Even if you wanted to add a sprinkling nozzle for that.

Furthermore, the conventional watering device has the following problems.
That is, the watering worker may temporarily stop watering due to a break or the like. In this case, the watering worker closes the watering nozzle at hand and stops watering, but there is a case where the operator in the vicinity of the watering device is not informed of the temporary stop. Therefore, the watering device was not operated temporarily, and the pump continued to drive despite the absence of watering, resulting in heat damage.

  The present invention has been made in view of the above-mentioned problems, and its purpose is to spray water that can be sprinkled regardless of whether it is a low-rise structure or a high-rise building by using a watering device with a single pump. To provide an apparatus.

The object of the present invention is achieved by the following configurations.
In sprinklers to prevent the generation of dust by watering construction sites such as the structure demolition site or dust treatment plant,
A pump that boosts the pumped water to a high water pressure and pressurizes and distributes the pumped water to a high-pressure sprinkling path;
A pressure reducing valve that reduces the high water pressure to a low water pressure and distributes the water to a low pressure watering path;
A discharge port for selectively connecting the high-pressure water spray nozzle and the low-pressure water spray nozzle;
A three-way selector valve that selectively circulates water flowing through the high-pressure water spray path and water flowing through the low-water pressure water spray path toward the discharge port;
A sensor for detecting a watering state by the high-pressure watering nozzle or the low-pressure watering nozzle;
A switching lever that switches to high-pressure water spray or low-pressure water spray corresponding to the high-pressure water spray nozzle or low-pressure water spray nozzle selectively connected to the discharge port;
A control unit for controlling the drive of the pump, the pressure reducing valve and the three-way switching valve according to the detection signal supplied from the sensor and the switching state of the switching lever;
A watering device characterized by comprising:

The watering device increases the water pressure by a single pump and distributes it through the high-pressure watering path, and distributes high-pressure water to the low-pressure watering path by reducing the water pressure to a low water pressure by a pressure reducing valve. On the other hand, a switching lever that switches between high-pressure water spraying and low-pressure water spraying is provided corresponding to each discharge port, and a three-way switching valve that selectively distributes high water pressure water and low water pressure water to each discharge port is provided. ing. Therefore, when high-pressure water spraying is performed, a high-pressure water spray nozzle is connected to the discharge port, and the switching lever is switched to the high-pressure side, so that the three-way switching valve operates to circulate water in the high-pressure water spray path to the discharge port. High pressure watering is performed.
On the other hand, when low-pressure water spraying is performed, a low-pressure water spray nozzle is connected to the discharge port, and the switching lever is switched to the low-pressure side so that the three-way switching valve operates to distribute the water in the low-pressure water spray path to the discharge port. And low-pressure watering is performed.

  A watering device, wherein a bypass electromagnetic valve is provided on the upstream side of the pressure reducing valve and discharges water in the high-pressure watering passage by the control unit.

  According to this configuration, for example, when high-pressure water spraying stops for some reason, the sensor detects the water spray, and the bypass solenoid valve is automatically driven by the operation of the control unit. Therefore, the water in the high-pressure watering path is discharged, and an undesired increase in water pressure and burning of the motor and pump can be prevented.

  A watering device comprising a generator for obtaining a power source for a motor for driving the pump and a power source for control.

  According to this configuration, high-pressure watering and low-pressure watering can be performed with the electric power generated by the generator even at a site where a commercial power source cannot be used.

As described above, according to the present invention, the water pressure is increased until high-pressure water can be sprayed by a single pump, so that water can be sprayed to a construction site such as a high-rise building. In addition, because the high water pressure can be reduced to low water pressure by the pressure reducing valve, pumps for low-pressure watering are unnecessary, reducing the number of installed pumps, reducing the number of pipes attached to the pump, downsizing the entire device, and simplifying Effects such as conversion can be obtained.
Further, by the action of the three-way switching valve, high-pressure water and low-pressure water selectively flow to the discharge port, and the discharge port is switched between high-pressure water spraying and low-pressure water spraying by the switching lever. Accordingly, the discharge port can be shared, and the usability of the watering device is improved.
Furthermore, since the high-pressure water can be discharged by the bypass solenoid valve, for example, even when the high-pressure watering is stopped, the pump can be prevented from being heated, and the reliability of the watering device can be improved. it can.
Since the control of water discharge etc. is automatically performed by detecting the presence / absence of watering, the flow rate of water, etc., it is possible to reduce the manual work of workers and to improve the workability.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a system diagram showing a configuration of a watering device according to an embodiment of the present invention, FIG. 2 is a side view showing a configuration example of a discharge port, FIG. 3 is a circuit diagram showing a configuration example of a control unit, and FIG. It is explanatory drawing which shows.

As shown in FIG.1 and FIG.4, the watering apparatus 1 in this embodiment is equipped with one pump in one housing 2, and the low-rise house 3 is original by the discharge port shared by high pressure watering and low pressure watering. It is constructed so that water can be sprinkled on the upper floor of the high-rise building 4 of about 10-30F.
First, the internal configuration of the watering device 1 will be described with reference to FIG.
The control panel 11 is installed outside the housing 2 and is configured such that various settings are performed by an operator (not shown). The control unit 12 is configured to control the entire apparatus based on a control signal Va input from the control panel 11, a detection signal Vb corresponding to the watering state, a switching signal Vc corresponding to switching of the discharge ports, and the like. Yes. The generator 13 is driven and controlled by the control unit 12, and the motor 14 and thus the pump 15 are driven based on the generated power.

  The pump 15 is driven by a motor 14 and performs pumping, conversion to a high water pressure, and discharge of a large flow rate. The pump 15 is configured to be able to adjust the water pressure and the amount of water discharge by controlling the rotation of the motor 14. Yes. The pump 15 is connected to a pumping pipe 21 that pumps water from the water storage tank 16 and a water discharge pipe 22 that discharges water at a high pressure and a large flow rate. A check valve 23 is provided between the pump 15 and the water discharge pipe 22, and is configured to prevent the backflow of water once discharged.

The water discharge pipe 22 is branched into high pressure water spray paths 22a to 22c corresponding to the number of installed discharge ports 31a to 31c and a water discharge path 22d for adjusting water pressure. In addition, each discharge port 31a-31c is installed as needed, and can be extended to n pieces as shown in FIG.
A bypass electromagnetic valve 24 and a pressure reducing valve 25 are connected to the water discharge path 22d. The bypass solenoid valve 24 is for, for example, discharging high pressure water to the water storage tank 16 to reduce the water pressure in the water discharge pipe 22, that is, the high pressure water spray paths 22a to 22c, when high pressure water spray is not performed. In the state of FIG. 1, the water discharge path 22d is blocked, but water can be discharged when driven in the direction of arrow A.
The pressure reducing valve 25 is for reducing the pressure to a water pressure for low-pressure watering, and the reduced water is supplied to the low-pressure watering paths 27 a to 27 c via the check valve 26.

The three-way switching valves 28a to 28c are used for switching whether high-pressure water is circulated to the discharge ports 31a to 31c or low-pressure low-pressure water is circulated. Description will be made in relation to the switching operation of .about.31c.
The sensors 29a to 29c detect the presence / absence of watering and the flow rate when watering, and the detection signals Vb are individually supplied to the control unit 12. Water spray nozzles 32a to 32c for high-pressure water spraying or low-pressure water spraying are connected to the discharge ports 31a to 31c as necessary, and control valves 33a to 33c are provided to the water spray nozzles 32a to 32c. Yes.
Incidentally, discharge ports 31a to 31n are provided on one side surface of the housing 2 in the form shown in FIG. In FIG. 1, three discharge ports 31a to 31c are shown for the convenience of illustration, but in actuality, the number can be n as required.

  Each discharge port 31a-31n is shared by high-pressure watering and low-pressure watering, and switching levers 34a-34n are provided corresponding to each discharge port 31a-31n. For example, when high pressure watering is performed by the discharge port 31a and low pressure watering is performed by the other discharge ports 31b to 31n, only the switching lever 34a is switched to the high pressure side, and the other switching levers 34b to 34c are switched to the low pressure side. Since each of the switching levers 34a to 34n is provided with a detection switch, a switching signal Vc is transmitted from the switch (not shown) to the control unit 12 by the switching operation.

Next, a configuration example of the control unit 12 will be described with reference to FIG.
The control unit 12 includes a control circuit 12a configured by a logic circuit, a sequence circuit, or the like. The control circuit 12a comprehensively performs control of the entire apparatus 1, display of an operation state by the control panel 11, and the like in response to a control signal Va supplied from the control panel 11.

The A / D converters 41a to 41c convert the detection signals Vb supplied from the sensors 29a to 29c into digital signals. The switches 42a to 42c are provided in association with the switching levers 34a to 34c. When the switches 42a to 42c correspond to the switching states of FIG. 2, the switch 42a shows the switching state at the time of high-pressure watering, and the others are at the time of low-pressure watering. Indicates the switching state. By this switching, a high level or low level detection signal is supplied to the control circuit 12a.
The D / A converter 43 and the drive circuit 44 are for controlling the rotation of the motor 14, and the bypass solenoid valve 24, the pressure reducing valve 25, and the three-way switching valves 28a to 28c are switched and controlled by the control circuit 12a. It is like that.

When performing watering with the watering device 1, there are various watering methods as described below.
As shown in FIG. 4, when water is sprayed simultaneously on both the low-rise house 3 and the upper floor of the high-rise building 4, the hose connected to the high-pressure water spray nozzle 32a is connected to the discharge port 31a as described above, and the switching lever 34a is connected to the high pressure. Switch to the side. Further, the hoses connected to the low-pressure water spray nozzles 32b and 32c are connected to the discharge ports 31b and 31c as described above, and the switching levers 34b and 34c are switched to the low-pressure side. As a result, the switches 43a to 43c are switched as shown in FIG. 3, a high level detection signal Vc is supplied to the control circuit 12a by the switch 43a, and a low level detection signal Vc is supplied to the control circuit by the switches 43b and 43c. 12a. Then, the three-way switching valve 28a is switched by the control circuit 12a so that the high-pressure water spray path 22a communicates with the discharge port 31a. Further, the three-way switching valves 28a and 28c are switched so as to communicate the low-pressure water spray paths 27b and 27c with the discharge ports 31b and 31c.

  When the motor 14 is driven in this state, the pump 15 discharges water with a high water pressure and a large flow rate into the pipe 22, and high-pressure water spraying and low-pressure watering can be performed simultaneously as shown in FIG. Since this watering state is transmitted from the control unit 12 to the control panel 11, the operator can check the operation state with a pilot lamp and instruments.

  During the watering operation, it is assumed that an operator who is performing high-pressure watering, for example, operates the control valve 33a to stop high-pressure watering for some reason. In this case, the change and stop of the flow rate are detected by the sensor 29a, and it is detected by the output of the A / D converter 41a that the high-pressure water spray has been stopped. However, since the outputs of the A / D converters 42b and 42c do not decrease, the driving of the motor 14 continues. If left as it is, the motor 14 is overheated, but in the present embodiment, the bypass solenoid valve 24 is switched in the direction of arrow A by the operation of the control circuit 12a in response to the high-pressure water spray stop. As a result, the high-pressure water is discharged to the water storage tank 16 through the bypass electromagnetic valve 24, and the increase of the water pressure and the heating of the motor 14 are avoided. Further, when the water pressure is equal to or higher than a predetermined value, the pressure reducing valve 25 is driven so as to further reduce the pressure. Therefore, the low-pressure watering can be continued regardless of the high-pressure watering.

  As described above, it has been explained that high-pressure water spraying and low-pressure water spraying can be performed simultaneously, that even if high-pressure water spraying is stopped, no trouble occurs and low-pressure water spraying can be continued. However, according to this embodiment, all the watering nozzles 32a to 32c may be high-pressure watering in addition to the watering. In this case, by switching the switching levers 34a to 34c to the high pressure side, the three-way switching valves 28a to 28c operate so that the high pressure water spray paths 22a to 22c communicate with the discharge ports 31a to 31c. If any of the water sprays is controlled to stop during this operation, the bypass solenoid valve 24 operates in the same manner as described above, and discharge into the water storage tank 16 is performed.

In addition to the watering, for example, all the watering nozzles 32a to 32c may be low-pressure watering. In this case, by switching the switching levers 34a to 34c to the low pressure side, the three-way switching valves 28a to 28c operate so that the low pressure water spray paths 27a to 27c communicate with the discharge ports 31a to 31c. In this case, water spraying with reduced pressure water is performed. Further, when any of the water sprays is stopped, the water is discharged in the same manner as described above, or further pressure reduction is performed by the pressure reducing valve 25.
Further, in any of the above watering states, the water pressure control and the flow rate control of the pump 15 can be performed by the rotation control of the motor 14.
And when watering is stopped or when low-pressure watering is performed with a single watering nozzle, most of the water will be in the water discharge state, but the pump capacity will be reduced and the power consumption will be reduced overall, making it economical It can be performed.

Although one embodiment of the present invention has been described above, as indicated by the dotted line in FIG. 1, a regulating valve that performs the same operation as the bypass solenoid valve 24 may be provided for the low-pressure water spray paths 27 a to 27 c.
Moreover, about the structure of the control part 12, it can change freely, You may make it discharge | emit when high-pressure watering becomes more than fixed time. Further, a manual operation part by the operator may be set.
The power source may be configured to use not only a power source by a generator but also a commercial power source.

1 is a system diagram of a watering device showing a first embodiment of the present invention. It is a side view which shows the structural example of a discharge outlet. It is a circuit diagram which shows the structural example of a control part. It is explanatory drawing which shows a watering state.

Explanation of symbols

1 Watering device
2 Housing
3 Low-rise house
4 high-rise buildings
11 Control panel
12 Control unit
13 Generator
14 Motor
15 Pump
16 Water tank
21 Pumping pipe
22 Water discharge pipe
22a-22c High-pressure watering route
22d Water discharge route
23 Check valve
24 Solenoid valve for bypass
25 Pressure reducing valve
26 Check valve
27a-27c Low pressure watering route
31a-31c Discharge port
32a ~ 32c Watering nozzle
33a to 33c Control valve
34a-34c selector lever

Claims (3)

In sprinklers to prevent the generation of dust by watering construction sites such as the structure demolition site or dust treatment plant,
A pump that boosts the pumped water to a high water pressure and pressurizes and distributes the pumped water to a high-pressure sprinkling path;
A pressure reducing valve that reduces the high water pressure to a low water pressure and distributes the water to a low pressure watering path;
A discharge port for selectively connecting the high-pressure water spray nozzle and the low-pressure water spray nozzle;
A three-way selector valve that selectively circulates water flowing through the high-pressure water spray path and water flowing through the low-water pressure water spray path toward the discharge port;
A sensor for detecting a watering state by the high-pressure watering nozzle or the low-pressure watering nozzle;
A switching lever that switches to high-pressure water spray or low-pressure water spray corresponding to the high-pressure water spray nozzle or low-pressure water spray nozzle selectively connected to the discharge port;
A control unit for controlling the drive of the pump, the pressure reducing valve and the three-way switching valve according to the detection signal supplied from the sensor and the switching state of the switching lever;
A watering device characterized by comprising:   2. The watering device according to claim 1, wherein a bypass electromagnetic valve is provided upstream of the pressure reducing valve and discharges water from the high-pressure watering passage by the control unit.   2. The watering device according to claim 1, further comprising a generator for obtaining a power source for the motor for driving the pump and a power source for control.

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