JP2019202285A - Spray equipment - Google Patents

Abstract

To provide spray equipment which can perform replacement or the like of a head due to maintenance simply and safely and makes adjustment of a spray area pattern and enlargement of a spray area possible.SOLUTION: A frame 12 of a trough structure is installed freely vertically movably by an electric hoist 16 on the neighborhood of ceiling surface 14 of an indoor space or the like. A plurality of heads 28 which release aqueous spray liquid and produce a spray flow containing droplets and a high-voltage electric source device 36 which applies a high voltage to the plurality of heads 28 and electrifies droplets of the spray flow are arranged on the frame 12. The spray liquid is supplied to a spray liquid pipe line attaining the plurality of heads arranged on the frame 12 by a hose from a supply source pipe of the spray liquid and relaxation of the hose in accordance with rise and fall of the frame by means of a hanging mechanism is absorbed by hose winding by means of a reel of a hose relaxation absorption device. A retractor type fall prevention tool 22 prevents a sudden fall of the frame 12 due to wire cutting or failure of an electric hoist 16.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a spraying device that is installed in a semi-indoor or indoors, and generates and sprays a charged spray flow from a spray liquid such as water, a dust collector, an agricultural chemical, or a fire extinguishing agent.

  Conventionally, it is important to suppress the generation of dust as much as possible and to efficiently remove the generated dust from the air, for example, at a demolition site, a tunnel excavation site, a waste disposal site, and the like. Conventionally, dismantling work, waste disposal work, and the like are performed while sprinkling water to suppress generation of dust and to remove generated dust.

  As a spraying device for removing such dust, a plurality of heads are installed on a frame disposed near the ceiling of a space such as an indoor space, and water-based spraying liquid is discharged from the plurality of heads to include droplets. When generating a spray flow, a high voltage is applied to the head to spray a charged spray flow that charges the droplets of the spray flow, and a gradient acts between the charged droplets and dust floating in the air. There is known one that efficiently captures dust by force and removes it.

Japanese Patent No. 4014122 JP 2002-263604 A JP 2003-240224 A JP 2003-275617 A JP 2013-227806 A JP2013-226517A

  By the way, in such a spraying device, it is necessary to perform maintenance on the head disposed on the frame as necessary. Is doing.

  However, it is necessary to arrange an aerial work vehicle and an operator each time maintenance is performed, and in the factory where the work is being performed, it is necessary to make a work space for the aerial work vehicle. Is on.

  In order to solve this problem, the sprayer frame is constructed so that it is suspended by a hoist near the ceiling. During maintenance, the frame can be lowered to the ground with a hoist, making it safe and polite. There is an advantage that work can be done.

  However, a frame suspended near the ceiling by a hoist is connected to a hose for supplying spray liquid to the head and a cable for supplying commercial AC power to the high-voltage power supply, and the hose and cable are connected to the ceiling surface. It is fixed to the ceiling surface at each important point to keep it along, and when lowering the frame for maintenance, it is necessary to lean on the ceiling with an aerial work vehicle and remove the hose and cable fixing part to the ceiling surface In addition, when restoring after maintenance, on the contrary, it is necessary to perform the setting work of lifting the frame and fixing the hoses and cables along the ceiling surface. There were problems with personnel, time and cost.

  Further, the conventional spraying device has a problem that the head is fixed to the frame, and the spraying area pattern cannot be adjusted.

  Further, the conventional spraying device has a problem that the effective spraying range is about 3 meters even if the spray flow from the head is directed sideways, and cannot be sprayed over a wider area.

  An object of the present invention is to provide a spraying device that can easily and safely replace a head by maintenance, and that can adjust a spraying area pattern and expand a spraying area.

(Spraying device)
The present invention is a spray device installed in a semi-indoor or indoor space,
A plurality of heads for discharging a water-based spray and generating a spray stream containing droplets;
A high-voltage power supply device that applies a predetermined high voltage to a plurality of heads to charge droplets (water particles) of the spray flow;
A frame provided with a plurality of heads and a high-voltage power supply device;
A hanging mechanism that can be raised and lowered to hang the frame near the ceiling of the space, and
A hose that supplies the spray liquid to the spray liquid pipes that are arranged in a frame arranged near the ceiling from the supply pipe of the spray liquid pressurized by the pressurizer and reach a plurality of heads;
A hose slack absorbing device that absorbs the slack of the hose accompanying the lifting and lowering of the frame by the suspension mechanism by winding the reel;
Is provided.

(Fall prevention device)
Further, a retractor type fall prevention device is provided for preventing a sudden drop of the frame due to a wire of the suspension mechanism or a failure.

(Cable slack absorber)
The high-voltage power supply unit is supplied with commercial power via a power cable connected to an outlet fixed on the indoor side.
A cable slack absorbing device is provided that absorbs slack of the power cable accompanying the lifting and lowering of the frame by the suspension mechanism by winding the reel.

(Frame trough structure and two suspensions)
The frame is a frame having a truss structure, and the suspension mechanism is arranged to suspend at least two portions of the frame.

(Hanging mechanism)
The hanging mechanism is an electric hoist installed in the vicinity of the ceiling or an electric winch installed in the frame.

(Radiation angle of spray flow)
The head includes an angle adjusting unit that can adjust the radiation angle of the spray flow.

(Control valve for spray liquid)
A control valve capable of controlling the supply of the spray liquid is provided in the middle of the spray liquid pipe that reaches each of the plurality of heads arranged in the frame.

(DIN rail)
Further, a DIN rail is fixed to the frame, and the head is disposed so that its position can be changed via a gripping member that grips the DIN rail.

(Blower fan device)
Further, a blower fan device that adjusts the spray area by causing the blower flow to act on the spray flow from the head from below is provided on the frame so that the blower direction can be changed.

(Deflector)
The blower fan device is provided with a deflector that converts the blown air flow from a substantially cylindrical shape to a generally fan shape.

(Head structure)
Head
An ejection nozzle unit that generates a spray flow including liquid droplets while ejecting the pressurized spray solution;
Disposed around the spray flow ejected from the ejection nozzle unit, a predetermined voltage is applied from the high-voltage power supply device to form a predetermined electric field, and the droplets generated at the ejection nozzle unit are charged by the electric field and charged spray flow An induction electrode consisting of a generally ring-shaped conductor coated with an insulator
A water-side electrode portion that provides a reference potential for the voltage applied to the induction electrode;
Is provided.

(Applied voltage)
The voltage applied when the spray flow is generated by the head is set to a predetermined voltage in the range of −20 kV to 20 kV excluding 0V.

(Basic effect)
The present invention is a spraying device installed in a semi-indoor or indoor space, and discharges water-based spray liquid to generate a spray flow including droplets, and a predetermined high voltage to the plurality of heads. A high-voltage power supply that applies and charges the droplets of the spray flow, a frame provided with a plurality of heads and a high-voltage power supply, a lifting mechanism that can be raised and lowered to hang the frame near the ceiling of the space, and A hose that supplies spray liquid to a spray liquid pipe that is arranged in a frame arranged near the ceiling from a supply pipe of spray liquid pressurized by a pressurizing device, and a frame by a suspension mechanism The hose slack absorbing device that absorbs slack of the hose as it goes up and down by winding the reel is provided, so when lowering the frame with the head suspended near the ceiling, the hose is removed from the hose slack absorbing device. When the frame is raised, the hose is wound around the hose slack absorbing device, so even if the hose is connected from the spray liquid supply pipe to the frame side, There is no need to remove the ceiling part from the ceiling or to restore the hose to the ceiling part when raising the frame. The frame is easily and safely lowered, the head is inspected in a short time, and repairs are made as necessary. Safe and careful maintenance work such as replacement is possible.

(Effect of fall prevention device)
In addition, a retractor-type fall prevention device is provided to prevent the frame from dropping suddenly due to wire cutting or failure of the suspension mechanism. When trying to do so, the retractor type fall prevention device can be operated to prevent the frame from falling, and high safety can be ensured.

(Effect of cable slack absorber)
The high-voltage power supply unit receives commercial power from a power cable connected to an outlet fixed on the indoor side, and absorbs the slack of the power cable due to the lifting and lowering of the frame by the suspension mechanism by winding the reel. Since the cable slack absorbing device is provided, as in the case of the hose slack absorbing device, when lowering the frame with the head suspended near the ceiling, the power cable is sent out from the cable slack absorbing device, and the frame Power cable is wound around the cable slack absorbing device, so even when the AC cable is input from the outlet fixed to the indoor side to the high voltage power supply unit of the frame, When removing the power cable from the ceiling, and when raising the frame The restoration work to be fixed to the ceiling portion is unnecessary, easily and safely lower the frame, check the head in a short period of time, it is possible to secure polite maintenance work, such as the repair and replacement, if necessary.

(The trough structure of the frame and the effect of hanging two places)
The frame is a frame having a truss structure, the suspension mechanism is disposed so as to suspend at least two places of the frame, and the suspension mechanism is installed on an electric hoist or a frame installed near the ceiling. Because it is an electric winch, the frame is reduced in weight by the truss structure, and the suspension of the frame is stabilized by suspending at least two places of the frame, and an electric hoist and electric winch that function as a suspension mechanism, and a ceiling structure Can be reduced.

(Effect by adjusting the radiation angle of the spray flow)
In addition, since the head is equipped with an angle adjustment unit that can adjust the radiation angle of the spray flow, the radiation angle of the spray flow from a plurality of heads arranged on the frame can be easily adjusted. On the other hand, it can spray efficiently.

(Effects of spray valve control valve)
In addition, since a control valve capable of controlling the supply of the spray liquid is provided in the middle of the spray liquid pipe that reaches each of the plurality of heads arranged in the frame, the plurality of heads arranged in the frame by controlling the opening and closing of the control valve The presence or absence of the charged spray flow due to the above can be selected as necessary, and the space or the object to be sprayed can be efficiently sprayed.

(Effects of DIN rail)
In addition, since the DIN rail is further fixed to the frame and the head is disposed so that the position can be changed via a gripping member for gripping the DIN rail, the head can be easily attached to and detached from the frame. If necessary, the head can be mounted at an arbitrary position, and an effect is obtained that it is not necessary to provide a place and structure for mounting the head on the frame side.

  Furthermore, by attaching the head to the DIN rail via a gripping member, the arrangement interval of the plurality of heads arranged on the frame can be easily adjusted as necessary, and it is efficient for the space or the object to be scattered. Can be sprayed.

(Effect of the blower fan device)
Furthermore, since the air blowing fan device that adjusts the spraying area by allowing the air flow to act on the spray flow from the head from the lower side is provided on the frame so that the air blowing direction can be changed, the air flow from the air blowing device is put on the air flow from the head. By carrying the charged spray flow, the spray area can be expanded over a wide area.

(Effect of deflector)
In addition, the blower fan device is provided with a deflector that converts the blower flow from a generally cylindrical shape to a generally fan shape, so that the substantially cylindrical blower flow from the blower fan device hits the deflector and spreads in a substantially fan shape. It acts on the flow including the charge from the substantially lower side, and the width of the charged spray flow from the head can be widened to reduce the dispersion unevenness in the spray area.

(Effect of head structure)
The head is disposed around a spray nozzle section that generates a spray flow including liquid droplets while spraying the spray liquid supplied under pressure, and around the spray flow sprayed from the spray nozzle section. An induction electrode composed of an approximately ring-shaped conductor coated with an insulator that forms a predetermined electric field by applying a voltage of, and charges a droplet generated by the ejection nozzle portion by an electric field to form a charged spray flow; Since it has a water-side electrode section that provides a reference potential for the voltage applied to the induction electrode, the droplet generated by the ejection nozzle section can be charged by the electric field formed by the induction electrode section, and can be charged easily and reliably. A spray stream can be generated and ejected.
The

(Applied voltage)
Since the voltage applied when the spray flow is generated by the head is a predetermined voltage in the range of −20 kV to 20 kV excluding 0 V, the occurrence of corona discharge can be prevented.

Explanatory drawing showing an embodiment of a spraying device Explanatory drawing which showed the hanging structure of the frame by the raising / lowering mechanism and the retractor type fall prevention device Explanatory drawing showing hose slack absorbing device and cable slack absorbing device mounted on the frame Explanatory drawing which showed the spraying device of Drawing 1 from the side Explanatory drawing which showed the spraying device which adjusted the radiation direction of a plurality of heads to the same direction Explanatory drawing showing the spray liquid piping system and control system provided with a control valve for each head Explanatory drawing showing the structure of a head that discharges a charged spray flow Sectional drawing which showed the internal structure of the head by the XX cross section of FIG.7 (B).

[Nebulizer]
FIG. 1 is an explanatory view showing an embodiment of a spraying device for removing dust and cooling, FIG. 2 is an explanatory view showing a frame suspension structure by a lifting mechanism and a retractor type fall prevention device, and FIG. 3 is mounted on the frame FIG. 4 is an explanatory view showing the spray device of FIG. 1 from the side, and FIG. 5 is a spray in which the radiation directions of a plurality of heads are adjusted in the same direction. It is explanatory drawing which showed the apparatus.

(Overview of spraying equipment)
As shown in FIG. 1, the spray device 10 of the present embodiment is installed in a semi-indoor or indoor space where a part of a factory facility or the like where dust is generated is outdoors, and a charged spray flow. Dust is efficiently captured and dropped and removed by a gradient force that is discharged into the target space and acts between the charged droplets and the dust floating in the air. In addition, when the temperature is high in summer, the charged droplets released into the target space adhere to the worker, and can also serve as a cooling action by removing the heat of vaporization by evaporation of the droplets.

  The spraying device 10 suspends both sides of the frame 12 reduced in weight by the trough structure by an electric hoist 16 that functions as a suspending mechanism in the vicinity of the ceiling surface 14 in the target space. Further, both sides of the frame 12 are suspended by a retractor-type fall prevention device 22.

  A DIN rail 32 is provided on the frame 12, and a plurality of heads 28, for example, ten heads 28, are disposed on the DIN rail 32 by gripping members 34. A high voltage power supply device 36 is disposed in the center of the frame 12. The head 28 discharges the water-based spray liquid to generate a spray flow including droplets. At this time, a predetermined high voltage is applied to the head 28 from the high-voltage power supply 36 to charge the droplets of the spray flow. The charged spray flow is discharged to the target space.

  The frame 12 is equipped with a hose slack absorbing device that absorbs slack in the hose that supplies the pressurized spray liquid and a cable slack absorbing device for the power cable that supplies AC power to the high-voltage power supply device 36. The illustration is omitted.

(Electric hoist)
As shown in FIG. 2, the end of the frame 12 is suspended by an electric hoist 16 in the vicinity of the ceiling surface 14 so as to be movable up and down.

  The electric hoist 16 is sandwiched and fixed from the lower side to the ceiling beam member 20 constructed on the ceiling surface 14 by the connecting device 18, and the hook 16 b provided at the tip of the wire 16 a drawn from the electric hoist 16 is attached to the frame. 12 is suspended and suspended by a lift latching portion 12a formed on the upper side of the end portion.

  The electric hoist 16 can lower the frame 12 by unwinding the wire 12a by driving the motor by operation of a controller connected by cable or a controller connected by communication wirelessly. The frame 12 can be raised by winding the wire 12a by driving.

  Further, in order to support when the electric hoist 16 is operated for maintenance and the frame 12 is lowered to the ground, a support leg 12b with a shock absorber is provided below the end of the frame 12.

  As a mechanism for suspending the frame 12, an electric winch is mounted on the frame 12 in addition to the electric hoist 16, and a wire from the electric winch is hooked to a fixing portion on the ceiling surface 14 side to drive the electric winch. Thus, the frame 12 may be raised and lowered.

(Retractor type fall prevention device)
As shown in FIG. 2, the end of the frame 12 is suspended by an electric hoist 16 and suspended by a retractor-type crash prevention device 22. The retractor type fall prevention device 22 is sandwiched and fixed from the lower side to the ceiling beam material 2 constructed on the ceiling surface 14 by the connecting device 24, and is attached to the tip of the wire 22a drawn from the retractor type fall prevention device 22. The provided hook 22b is suspended and suspended by a lift latching portion 12a formed on the upper end of the frame 12.

  The retractor-type anti-falling instrument 22 does not brake when the wire 22a is pulled out at a low speed, but when the wire 22a is pulled out rapidly, the brake acts and the pull-out of the wire 22a is locked. For this reason, when the wire 16a of the electric hoist 16 is cut or the electric hoist 16 breaks down and the frame 12 is about to fall suddenly, the retractor type fall prevention device 22 is actuated against the sudden pulling of the wire 22a. Then, the brake is applied and locked to prevent the frame 12 from falling and to ensure high safety.

(Loose absorber for hose and power cable)
As shown in FIGS. 3 and 4, the hose slack absorbing device 42 and the cable slack absorbing device 46 are mounted on the frame 12 suspended by the electric hoist 16.

  A plurality of heads 28 arranged in the frame 12 are connected to a spray liquid pipe for supplying a spray liquid, and the spray liquid pipe of the frame 12 is pressurized by a pressurizing device installed on the ground side. A hose 44 for supplying the spray liquid from the spray liquid supply pipe is connected via a hose slack absorbing device 42.

  The hose slack absorbing device 42 winds a hose 44 pulled down from a ceiling side on a hose reel 42a, and the hose reel 42a is given a certain tension in the hose winding direction by a built-in motor.

  When the electric hoist 16 is operated to lower the frame 12, the hose 44 is sent out from the hose slack absorbing device 42. When the electric hoist 16 is operated to raise the frame 12, the hose 44 is hose slack absorbing device. 42 is wound up.

  For this reason, even if the hose 44 is connected to the frame 12 side from the supply pipe of the spray liquid, it is not necessary to remove the hose from fixing the ceiling when lowering the frame 12, and when raising the frame 12. This eliminates the need for restoration work for fixing the hose 44 to the ceiling surface 14 side, and performs safe and careful maintenance work such as lowering the frame 12 easily and safely, inspecting the head 28 in a short time, and repairing and replacing it if necessary. be able to.

  In the present embodiment, the high-voltage power supply device 36 disposed in the frame 12 is supplied with a commercial power supply AC100V by a power cable 48 connected to an outlet fixed on the indoor side. On the other hand, a power cable 48 connected to an outlet is connected via a cable slack absorbing device 46.

  An induction electrode power cable 38 and a water-side electrode power cable 40 are drawn out from the high voltage power supply 36 and connected to a plurality of heads 28 so as to supply a predetermined high voltage.

  The cable slack absorbing device 46 winds a power cable 48 pulled down from the ceiling side around a cable reel 46a, and the cable reel 46a is given a certain tension in the cable winding direction by a built-in motor.

  When the electric hoist 16 is operated to lower the frame 12, the power cable 48 is sent out from the cable slack absorbing device 46. When the electric hoist 16 is operated to raise the frame 12, the power cable 48 is loosened. It is wound around the absorption device 46.

  For this reason, even when the power cable 48 from the outlet fixed indoors is connected to the high-voltage power supply 36 on the frame 12 side, the work of removing the power cable 48 from the fixing of the ceiling surface 14 when lowering the frame 12 is performed. In addition, when the frame 12 is raised, the restoration work of fixing the power cable 484 to the ceiling surface 14 side becomes unnecessary, the frame 12 is lowered easily and safely, the head 28 is inspected in a short time, and if necessary Safe and careful maintenance work such as repair and replacement can be performed.

  In addition, since the connection of the power cable 48 with respect to the flame | frame 12 is not performed when the DC power supply by a battery or a storage battery is input as the high voltage power supply device 36, the cable slack absorbing device 46 is provided in this case. There is no need.

(Head mounting structure with DIN rail)
As shown in FIGS. 2 and 3, a DIN rail 32 is fixed to the frame 12, and the head 28 is disposed so that its position can be changed via a gripping member 34 that grips the DIN rail 32.

  For this reason, it is possible to easily and easily perform an exchange operation by removing and attaching the head 28 to the DIN rail 32 in a state where the electric hoist 16 is operated and the frame 12 is lowered to the ground.

  Further, the head 28 can be attached at an arbitrary position on the DIN rail 32, and it is not necessary to provide a place and structure for attaching the head 28 to the frame 12 side.

  Furthermore, by attaching the heads 28 to the DIN rails 32 via the gripping members 34, the arrangement intervals of the plurality of heads 28 arranged on the frame 12 can be easily adjusted as necessary. It is possible to adjust to a pattern that efficiently spreads.

(Radial angle adjustment of spray flow)
As shown in FIG. 4, the head 28 is fixed to the DIN rail 32 via the angle adjustment unit 30 with a gripping member 34. The angle adjusting unit 30 can adjust the radiation angle of the charged spray flow emitted from the head 28 to an arbitrary angle. In the present embodiment, as shown in FIG. 1, every other radiation angle of the head 28 is adjusted to be a forward downward angle and a backward downward angle.

  On the other hand, as shown in FIG. 5, the angle adjustment unit 30 can easily adjust the radiation angles of all the heads 28 to the front downward angle.

[Head selection by control valve]
FIG. 6 is an explanatory view showing a spray liquid piping system and a control system in which a control valve is provided for each head. In the embodiment of FIGS. 1 to 5, the charged spray flow is discharged all at once from all the heads 28 arranged on the frame 12, but as another embodiment, as shown in FIG. 6. In addition, the presence or absence of discharge of the charged spray flow may be selected for each head 28.

  As shown in FIG. 6, a branch pipe from the spray liquid pipe 52 is connected to the plurality of heads 28 arranged on the frame 12 via a control valve 50. The control valve 50 is an electric valve or an electromagnetic valve, and can be opened and closed by a control signal from the control device 54. The control device 54 is provided with an operation unit or a setting unit for selecting the head 28 to be operated. When the head 28 that discharges the charged spray flow is selected, the selected control valve 50 is controlled to be opened and not selected. The control valve 50 is closed.

  In addition, a signal line including an induction electrode power cable and a water-side electrode power cable is individually connected to the head 28 from the high voltage power supply device 36 via the control device 54, and the head 28 to be operated in the control device 54 is connected. A high voltage is applied to the signal line corresponding to the selection.

  As described above, the presence or absence of the charged spray flow by the plurality of heads 28 arranged in the frame 12 can be selected as necessary by controlling the opening and closing of the control valve 50, and can be efficiently sprayed to the space or the object to be sprayed. A spreading pattern can be formed.

  Since the head 28 to be operated is selected at an initial stage when the operation of the spraying apparatus 10 is started, the control of the head 28 to be operated is performed with the control valve 50 as a manual valve and the frame 12 lowered to the ground. The valve 50 may be opened and the control valve 50 of the head 28 that is not operated may be closed.

[Blower fan device]
As another embodiment of the spraying device according to the present invention, the frame 12 is provided with a blower fan device that adjusts the spraying area by applying a blowing flow to the spraying flow from the head 28 from below. Further, the air blowing fan device is provided with a deflector that receives a substantially cylindrical air flow ejected by the rotation of the fan and converts the air flow into an approximately fan air flow.

  The blower fan device provided with the deflector as described above is provided below the plurality of heads 28 disposed on the frame 12, and the generally cylindrical airflow from the blower fan device hits the deflector to roughly It acts on the flow containing the charge from the head in a fan-shaped state from the lower side, and carries the charged spray flow from the head 28 on the air flow from the deflector, so that the spraying area can be expanded over a wide range. Furthermore, the charged spray flow from the head 28 is carried on the air flow spreading in a fan shape from the deflector, so that the width of the charged spray flow from the head 28 can be widened to reduce unevenness in the spray area. .

[Head structure]
FIG. 7 is an explanatory view showing a head, FIG. 7 (A) shows a front view, and FIG. 7 (B) shows a plane. FIG. 8 is a cross-sectional view showing the internal structure of the head by the XX cross section of FIG.

  As shown in FIG. 7A, FIG. 7B, and FIG. 8, the head 28 of this embodiment includes an apparatus body 112, a body cover 114, a liquid conduit portion 116, a water side electrode portion 117, and an injection nozzle portion 118. The induction electrode unit 120 and the induction electrode holding unit 124 are configured.

  The device body 112, the body cover 114, the liquid conduit portion 116, the injection nozzle portion 118, and the induction electrode holding portion 124 are made of an insulating material, which is made of polyvinyl chloride resin, polyphenylene sulfide resin, urethane resin, poly It is formed using at least one of tetrafluoroethylene resin, polychlorotrifluoroethylene resin, ceramics (alumina ceramics), and glass bottle as an insulating material.

  A through-hole is formed in the apparatus body 112 in the direction of the axial center line 136, a water-side electrode portion 117 is fitted from the lower side, a liquid conduit portion 116 is fitted on the upper side, and the water-side electrode portion 117 has An electrode connecting portion 119 is connected. The electrode connecting portion 119 is provided with a screw hole 119a, and a water-side electrode power cable inserted from the cable connection hole 122 formed in the lateral direction of the apparatus body 112 is connected.

  Moreover, the upper part of the liquid conduit part 116 is taken out through the body cover 114, and sprayed liquid pressurized by a hose is supplied from the outside.

  The water side electrode part 117 and the electrode connection part 119 are made of a metal conductive material. The conductive material of the water-side electrode part 117 and the electrode connecting part 119 may be formed using a conductive resin, fiber bundle, rubber or the like in addition to metal, or using a composite that combines these. It may be formed.

  An injection nozzle portion 118 is provided on the distal end side of the water side electrode portion 117 disposed in the axial direction of the apparatus body 112. The injection nozzle unit 118 discharges droplets having an average particle diameter of 100 to 300 μm.

  In the open space on the tip side of the injection nozzle 118, the induction electrode unit 120 is arranged by the induction electrode holding unit 124. The induction electrode portion 120 is formed by covering a conductive electrode core material 120b with an insulating coating 120c, and a ring-shaped ring portion 120a is formed at the lower end of a support portion 120d arranged in the vertical direction.

  The electrode core material 120b of the induction electrode portion 120 is a conductive metal, and may be formed using a conductive resin, fiber bundle, rubber, or the like in addition to the metal, and a composite that combines these may be used. It may be formed using.

  The insulating material of the insulating coating 120c in the induction electrode portion 120 includes polyvinyl chloride resin, polyphenylene sulfide resin, urethane resin, polytetrafluoroethylene resin, polychlorotrifluoroethylene resin, ceramics (alumina ceramics), glass bottle Are formed using an insulating material.

  An induction electrode power cable 38 and a water electrode power cable 40 are connected to the water electrode section 117 and the induction electrode section 120 from the high voltage power supply device 36 provided in the frame 12 shown in FIG. When a predetermined direct current (AC or pulse) voltage in the range of +0.5 kV to +20 kV or −0.5 Kv to −20 kV is applied between the portion 117 and the induction electrode portion 120, the periphery of the ring portion 120 a of the induction electrode portion 120 A predetermined external electric field is formed on the liquid crystal, and the liquid ejected from the spray nozzle 118 is split near the splitting point A to generate droplets. Therefore, the droplets generated at the splitting point A are charged and charged. A sprayed stream of droplets is released.

  For example, when a DC voltage is applied to the induction electrode unit 120, either a positive or negative charged droplet is generated according to the polarity of the induction electrode unit 120. Further, when a voltage is applied in an alternating current or pulse form, droplets that are selectively charged with a positive charge or a negative charge are generated according to the polarity of the induction electrode section 120 that is alternately switched.

  Further, the voltage applied to the induction electrode unit 120 by the high-voltage power supply device 36 of FIG. 4 may be a constant voltage or may be varied in the range of +0.5 kV to +20 kV or −0.5 Kv to −20 kV. And when it is in the range of +0.5 kV to +20 kV or −0.5 Kv to −20 kV in this way, the occurrence of spark discharge (corona discharge) is prevented, and a charged spray flow of charged droplets is generated while ensuring safety. Is done.

  The structure of the head 28 is not limited to the embodiment shown in FIGS. 7 and 8. A head having an appropriate structure for generating a droplet and generating a charged spray flow by charging the generated droplet by an induction charging method. Can be used.

[Modification of the present invention]
(Fall prevention device)
The above embodiment is provided with a retractor type fall prevention device to prevent the frame from dropping due to wire cutting or failure of the electric hoist, but in the case where high safety of the electric hoist is guaranteed, etc. Does not have to be provided with a retractor-type crash prevention device.

(Spraying device)
The above embodiment is an example of a spray device that discharges a charged spray flow that serves as both dust removal and cooling in the target space, but the present invention is not limited to this, and is a crop cultivation facility. It can also be applied to spraying of agricultural chemicals and spraying fire extinguishing agents to the space to be protected.

(Other)
The present invention is not limited to the above-described embodiments, includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited by the numerical values shown in the above-described embodiments.

10: Spraying device 12: Frame 12a: Lift locking part 12b: Support leg 14: Ceiling surface 16: Electric hoist 16a, 22a: Wire 18, 24: Connecting device 20, 26: Ceiling beam material 22: Retractor type fall prevention Instrument 28: Head 30: Angle adjustment part 32: DIN rail 34: Grip member 36: High voltage power supply device 38: Induction electrode power supply cable 40: Water side electrode power supply cable 42: Hose slack absorber 42a: Hose reel 44: Hose 46: Cable slack absorbing device 46a: Cable reel 48: Power cable 50: Control valve 52: Spray liquid piping 54: Control device

Claims (12)

A spray device installed in a semi-indoor or indoor space,
A plurality of heads for discharging a water-based spray and generating a spray stream containing droplets;
A high voltage power supply device that applies a predetermined high voltage to the plurality of heads to charge the droplets of the spray flow; and
A frame in which the plurality of heads and the high-voltage power supply device are disposed;
A lifting mechanism that can be raised and lowered to hang the frame near the ceiling of the space; and
A hose that supplies the spray liquid to the spray liquid pipes that are disposed in the frame disposed in the vicinity of the ceiling from the supply pipe of the spray liquid pressurized by a pressurizing device to the plurality of heads;
A hose slack absorbing device that absorbs slack of the hose accompanying the lifting and lowering of the frame by the suspension mechanism by winding a reel;
A spraying device characterized in that is provided.
The spray device according to claim 1,
Furthermore, a retractor type fall prevention device for preventing a sudden drop of the frame due to cutting or failure of the suspension mechanism is provided.
The spray device according to claim 1,
The high-voltage power supply device is supplied with commercial power by a power cable connected to an outlet fixed on the indoor side,
A spraying device, comprising: a cable slack absorbing device that absorbs slack of the power cable as the frame is raised and lowered by the suspension mechanism by winding a reel.
2. The spray device according to claim 1, wherein the frame is a frame having a truss structure, and the suspension mechanism is arranged to suspend at least two places of the frame.
2. The spraying device according to claim 1, wherein the suspension mechanism is an electric hoist installed in the vicinity of a ceiling or an electric winch installed in the frame.
2. The spray device according to claim 1, wherein the head includes an angle adjusting unit capable of adjusting a radiation angle of the spray flow. 3.
2. The spray device according to claim 1, wherein a control valve capable of controlling the supply of the spray liquid is provided in the middle of the spray liquid piping reaching each of the plurality of heads arranged in the frame. apparatus.
2. The spraying device according to claim 1, wherein a DIN rail is further fixed to the frame, and the head is disposed so that its position can be changed via a gripping member for gripping the DIN rail. Spraying device to do.
2. The spraying device according to claim 1, further comprising a blower fan device that adjusts a spraying area by allowing a blowing flow from the head to act on the spray flow from the head to adjust a spray area. A spraying device characterized by that.
10. The spraying device according to claim 9, wherein the blower fan device is provided with a deflector for converting the blown air flow from a substantially cylindrical shape to a generally fan shape.
The spray device according to claim 1,
The head is
An ejection nozzle part that generates a spray flow containing the droplets while ejecting the spray liquid supplied under pressure;
It is arranged around the spray flow ejected from the ejection nozzle part, a predetermined voltage is applied from the high-voltage power supply device to form a predetermined electric field, and the droplets generated by the ejection nozzle part are charged by the electric field An induction electrode composed of a generally ring-shaped conductor coated with an insulator that is charged into a sprayed flow;
A water-side electrode portion for providing a reference potential of a voltage applied to the induction electrode;
A spraying device comprising:
The spray device according to claim 10, wherein
The spraying apparatus, wherein a voltage applied when the spray flow is generated by the head is a predetermined voltage in a range of −20 kV to 20 kV excluding 0V.

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