Electrostatic Spray Head

Abstract

To provide a charging spray head configured so that an electrode part can be easily replaced and a type of the part also can be easily changed.SOLUTION: A charging spray head comprises: a main body part 20; a nozzle part 21 of one kind selected from a plurality of kinds, which is mounted on the main body part 20; an electrode part 23 of one kind selected from a plurality of kinds, which is arranged at a front side of the nozzle part 21; a plurality of arm parts 26 of one kind selected from a plurality of kinds which is adaptable to the electrode part 23, which holds the electrode part 23; and a fixing member 29 that fixes the arm parts 26 to the main body part 20. Further, the main body part 20 has a groove portion 31 formed along a circumferential direction on a front surface portion 30 opposing to the electrode part 23. The arm parts 26 have leg portions 40 arranged in the groove portion 31. The fixing member 29 has a fitting portion 56 that moves the fixing member 29 back and forth along a depth direction of the groove portion 31. The fitting portion 56 allows the fixing member 29 to press the leg portion 40 toward a depth side of the groove portion 31 to fix the portion.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an electrically charged spray head that can spray a spray agent in the form of a mist by electrically charging it. [Background technology]

[0002] Conventionally, a spray head is known that receives a supply of a spray agent such as water, turns it into a mist, and sprays it. The spray head can be installed in a building or the like and used to extinguish a fire. The spray head can also be used to suppress the generation of dust at a construction site or the like. By providing an electrode section in the spray head and charging the particles of the spray agent with the electric field, the spray agent can be easily attached to smoke, the object to be extinguished, dust, etc. Such an electrically charged spray head can more effectively extinguish fires and remove dust.

[0003] An example of an electrostatic spray head used for fire extinguishing is shown in Patent Document 1. An example of an electrostatic spray head used for dust removal is shown in Patent Document 2. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5797905 [Patent Document 2] Patent No. 5973219 Summary of the Invention [Problem to be solved by the invention]

[0005] The amount of spray agent, particle size, and spray angle required for the electrostatic spray head vary depending on the application, such as fire extinguishing or dust removal. These can be changed by changing the shape and size of the nozzle part of the electrostatic spray head. Also, electrodes with different diameters are used depending on the shape and size of the nozzle part.

[0006] For this reason, several types of electrostatic spray heads are available, each with a different shape and size of the nozzle and electrode portion, but each electrostatic spray head cannot be used for other purposes that require different amounts of spray agent, etc.

[0007] In addition, when the electrostatic spray head is used, a high voltage is applied to the electrode portion, which causes the insulating coating covering the surface of the electrode portion to deteriorate. When the insulating coating deteriorates and tiny pinholes or the like are formed, the insulating coating is destroyed through the holes, causing a decrease in insulation. For this reason, the electrode portion needs to be replaced, but in conventional electrostatic spray heads, it is not easy to replace the electrode portion.

[0008] The present invention has been made in consideration of the above problems, and has an object to provide an electrostatic spray head in which the electrode portion can be easily replaced and the type of electrode can be easily changed. [Means for solving the problem]

[0009] In order to solve the above problems, the electrostatic spray head according to the present invention has a main body, a nozzle part which is one type selected from a plurality of types and which is attached to the main body, an electrode part which is one type selected from a plurality of types and which is arranged in front of the nozzle part, a plurality of arm parts which are one type selected from a plurality of types that is compatible with the electrode part and which hold the electrode part, and a fixing member which fixes the arm part to the main body. The main body has a space on the rear side opposite to the front side where the nozzle is attached, and a plurality of fixing holes are provided along the circumferential direction at the back side of the space, and one of the fixing holes is selected to connect a wiring drawn in from the outside. . Effect of the Invention

[0010] According to the electrostatic spray head of the present invention, a nozzle unit and an electrode unit can be attached to a common main body unit by selecting from a plurality of types. Therefore, the configuration of the electrostatic spray head can be easily changed according to the application or purpose.

[0011] The main body may have a groove formed along the circumferential direction on a front surface facing the electrode, the arm may have a leg disposed in the groove, and the fixing member may have a fitting portion that moves the fixing member back and forth along a depth direction of the groove, and the fixing member may press the leg against the back side of the groove by the fitting portion. This allows multiple types of arm portions to be easily attached to and detached from the main body using a common fixing member.

[0012] The arm portion may have a fulcrum portion provided on the outer periphery of the leg portion and abutting against the bottom surface of the groove portion, a pressing portion provided on the inner periphery of the leg portion and pressed by the fixing member, and a holding portion that holds the electrode portion on the inner periphery, and when the pressing portion is pressed by the fixing member, the holding portion side of the arm portion may be tilted toward the inner periphery side with the fulcrum portion as a center. In this way, when the fixing member presses the arm portion, the electrode portion can be held and fixed by the holding portion using the principle of leverage, so that the electrode portion can be reliably fixed with a simple operation.

[0013] The fixing member may be made of a first member that fits along the groove and a second member that has the fitting portion and presses the first member, and the first member may have a plurality of notches in the circumferential direction for receiving the arm portions. This allows the plurality of types of arm portions having a common leg portion to be reliably pressed and swung, thereby firmly holding the electrode portion.

[0014] The fitting portion of the second member may be formed by a screw portion that screws into the main body portion, whereby the arm portion can be pressed by simply rotating the second member, making it easy to attach and detach the electrode portion. Furthermore, at least one of the multiple types of arm portions may be provided with a holding portion on its inner circumference for holding the electrode portion, and a through hole may be formed in the holding portion along the direction from the front surface to the back surface. [Brief description of the drawings]

[0015] [Figure 1] FIG. 2 is a perspective view of an electrically charged spray head relating to a first combination of a nozzle portion and an electrode portion. [Diagram 2] FIG. [Diagram 3]FIG. 2 is a perspective view of the main body as viewed from the front side. [Figure 4] FIG. [Diagram 5] FIG. 2 is a cross-sectional view of an electrostatic spray head. [Figure 6] FIG. 6 is a partially enlarged view of FIG. [Figure 7] 2 is a perspective view of the main body as viewed from the rear side. FIG. [Figure 8] FIG. 11 is a perspective view of an electrically charged spray head relating to a second combination of a nozzle portion and an electrode portion. [Figure 9] FIG. [Figure 10] FIG. 2 is a cross-sectional view of an electrostatic spray head. [Figure 11] FIG. 11 is a perspective view of an electrostatic spray head relating to a third combination of a nozzle portion and an electrode portion. [Figure 12] FIG. [Figure 13] FIG. 2 is a cross-sectional view of an electrostatic spray head. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The embodiment of the present invention will be described in detail with reference to the drawings. The electrostatic spray head of this embodiment can spray a spray agent such as water in a mist form by electrifying it, and can be attached to a common main body by selecting a nozzle part for spraying the spray agent and an electrode part for electrifying the spray agent according to the application. In this embodiment, an electrostatic spray head relating to three types of combinations of the nozzle part and the electrode part will be described.

[0017] FIG. 1 shows a perspective view of an electrically charged spray head 10 relating to a first combination of a nozzle portion 21 and an electrode portion 23. The electrically charged spray head 10 has a main body portion 20, a nozzle portion 21 attached to the main body portion 20, a ring-shaped electrode portion 23 disposed in front of the nozzle portion 21, and three arm portions 26 arranged in the circumferential direction to hold the electrode portion 23. The arm portions 26 are fixed to the main body portion 20 by a fixing member 29 consisting of a first member 50 and a second member 55. In addition, a piping portion 60 for supplying a spray agent is attached to the rear side of the main body portion 20. In this embodiment, the spray agent is water, but it may be another fluid.

[0018] A mist of the agent is sprayed forward from the nozzle section 21. A spray agent side electrode section 37, which will be described later, is provided inside the main body section 20. This spray agent side electrode section 37 is set as the reference voltage (earth) side, and a direct current (steady-state) voltage of, for example, several kV to several tens of kV, or an alternating current or pulsed voltage is applied to the electrode section 23. This generates an external electric field, which acts to charge the particles of the agent sprayed from the nozzle section 21. When a positive voltage with respect to the reference voltage is applied to the electrode section 23, the particles of the agent are negatively charged. On the other hand, when a negative voltage with respect to the reference voltage is applied to the electrode section 23, the particles of the agent are positively charged.

[0019] 2 shows a front view of the arm portion 26. The arm portion 26 has legs 40 fixed to the main body portion 20, and a holding portion 48 that holds and fixes the electrode portion 23 on the inner periphery side. With respect to the arm portion 26, the side of the legs 40 is referred to as the base end side, and the side of the holding portion 26 is referred to as the tip side. Also, in FIG. 2, the left side in the figure, where the holding portion 48 faces, corresponds to the inner periphery side of the main body portion 20, and the right side in the figure corresponds to the outer periphery side of the main body portion 20.

[0020] The leg 40 of the arm 26 has an outer circumferential side of the base end surface that protrudes toward the base end, and the outer circumferential end is a fulcrum portion 41. The inner circumferential portion of the leg 40 is a pressing portion 42 that protrudes toward the inner circumferential side. The arm 26 has an extension portion 43 that extends from the leg 40 toward the tip side. The inner circumferential surface of the extension portion 43 is a tapered surface portion 44 that is inclined so as to proceed from the base end along the tip side toward the outer circumferential side. The arm 26 has an expansion portion 46 between the extension portion 43 and the holding portion 48 that extends toward the outer circumferential side.

[0021] FIG. 3 shows a perspective view of the main body 20 as viewed from the front side. A groove 31 is formed along the circumferential direction on the front surface 30, which is the front side of the main body 20. The groove 31 is formed over the entire circumference of the front surface 30. A threaded portion 31d is formed on the inner peripheral surface 31c of the groove 31. A nozzle mounting portion 33 for fixing the nozzle portion 21 is provided on the inner peripheral side of the inner peripheral surface 31c of the groove 31. The nozzle mounting portion 33 has a space inside, which communicates with the front side and the back side of the main body 20, and supplies the spray agent from the piping portion 60 to the nozzle portion 21. The main body 20 also has a plurality of fixing surface portions 35 on its side. The fixing surface portions 35 allow the electrostatic spray head 10 to be fixed to various devices, buildings, etc.

[0022] FIG. 4 shows an exploded perspective view of the fixing member 29. As described above, the fixing member 29 is composed of the first member 50 and the second member 55. The first member 50 is formed in a ring shape along the groove 31 of the main body 20. The first member 50 has three notches 51 formed in the circumferential direction for positioning and receiving the leg 40 of the arm 26 in the groove 31. The second member 55 is formed in a cylindrical shape and can press the first member 50 with its lower surface. The inner peripheral surface of the second member 55 is formed with a fitting portion 56 that moves the second member 55 forward and backward along the depth direction of the groove 31 relative to the main body 20. The fitting portion 56 is formed by a screw portion 56a that screws into a screw portion 31d formed on the inner peripheral surface 31c of the groove 31. Therefore, by rotating the second member 55 relative to the main body 20, the second member 55 moves toward the bottom surface 31b of the groove 31 relative to the main body 20, pressing the first member 50. In addition, an edge 57 that spreads outwardly is formed on the tip side of the second member 55.

[0023] 5 shows a cross-sectional view of the electrostatic spray head 10. A piping section 60 extends from the rear side to the inside of the main body section 20. A cover member 61 is provided on the main body section 20 so that the piping section 60 penetrates therethrough. In addition, a nozzle section 21 is attached to the nozzle attachment section 33 of the spray agent side electrode section 37.

[0024] The leg portion 40 of the arm portion 26 is disposed inside the groove portion 31 of the main body portion 20. The pressing portion 42 of the leg portion 40 is pressed by the fixing member 29 from the front side of the main body portion 20 toward the back side of the groove portion 31, whereby the arm portion 26 is fixed to the main body portion 20.

[0025] FIG. 6 shows a partially enlarged view of FIG. 5. Hatching is omitted in FIG. 6. The leg 40 of the arm 26 has the fulcrum 41 on the outer periphery side in contact with the bottom surface 31b of the groove 31, and the pressing portion 42 on the inner periphery side is in a state of being lifted up from the bottom surface 31b of the groove 31. When the second member 55 of the fixing member 29 is rotated in the circumferential direction, the second member 55 moves in the direction of the arrow in the figure by the fitting portion 56, and presses the first member 50 toward the bottom surface 31b of the groove 31. As a result, the pressing portion 42 of the arm 26 is pressed toward the bottom surface 31b of the groove 31. When the pressing portion 42 is pressed, the arm 26 rotates about the fulcrum 41 as shown by the dashed line in the figure, and the holding portion 48 tilts toward the inner periphery side. The electrode portion 23 is pressed radially inward by the arm portion 26 due to the force of tilting the arm portion 26 in this direction. Since a plurality of arm portions 26 are provided in the circumferential direction, the electrode portion 23 is held and fixed by these plurality of arm portions 26. When the arm portion 26 is pressed by the fixing member 29 and holds and fixes the electrode portion 23, three points of the leg portion 40, namely, both ends in the thickness direction of the fulcrum portion 41 and the center in the thickness direction of the tip surface of the pressing portion 42, are in pressure contact with the groove portion 31, and the leg portion 40 is stably fixed to the groove portion 31.

[0026] FIG. 7 shows a perspective view of the main body 20 as seen from the rear side. As described above, the piping section 60 is housed on the rear side of the main body 20. The spray agent side electrode section 37 is disposed at the back of the space and is fixed by a fixing hexagonal nut 37a. The fixing hexagonal nut 37a is provided with six fixing holes 37b along the circumferential direction. Wiring (not shown) drawn in from the outside is connected to any one of the fixing holes 37b. Since a plurality of fixing holes 37b are provided in the circumferential direction, even if the orientation of the main body 20 or the direction of the wiring is different, the wiring can be fixed to any one of the fixing holes 37b without having to route the wiring around a large distance.

[0027] Next, another combination of the nozzle portion and the electrode portion will be described. Fig. 8 shows a perspective view of the electrically charged spray head 11 relating to the second combination of the nozzle portion 21 and the electrode portion 24. In Fig. 8, the main body portion 20, the spray agent side electrode portion 37, and the fixing member 29 are common to the electrically charged spray head 10 shown in Fig. 1. In the electrically charged spray head 11 in Fig. 8, the outer shape of the nozzle portion 21 is common to Fig. 1, but the electrode portion 24 is different from Fig. 1. In the electrode portion 24, the diameter of the ring-shaped portion is smaller. Therefore, the arm portion 27 also has a different shape from Fig. 1.

[0028] Fig. 9 shows a front view of the arm portion 27. The leg portion 40 of the arm portion 27 has the same shape as in Fig. 2. Therefore, the arm portion 27 can be fixed in the same manner to the main body portion of Fig. 8 which is the same as the main body portion 20 of Fig. 1. The arm portion 27 has an extension portion 43 which extends in a straight line from the leg portion 40 to the holding portion 48.

[0029] FIG. 10 shows a cross-sectional view of the electrostatic spray head 11. In this electrostatic spray head 11, the leg 40 of the arm 27 is located in the groove 31 of the main body 20, and is pressed and fixed by the fixing member 29. The fixing member 29 is fixed to the main body 20 by the fitting portion 56 consisting of the screw portion 56a, so that the worker can attach and detach the fixing member 29 by manually rotating the second fixing member 55. By removing the fixing member 29 from the main body 20, the arm 27 and the electrode 24 can be easily removed. In addition, by placing the legs 40 of the multiple arm portions 27 in the groove 31 and rotating the second fixing member 55 while holding the electrode 24 with the holding portion 48, the electrode 24 can be easily attached to the main body 20. Therefore, the electrode 24 can be easily replaced with another type of electrode, or the electrode 24 can be easily replaced without removing the main body 20 from the installed location.

[0030] 11 shows a perspective view of an electrically charged spray head 12 relating to a third combination of a nozzle portion 22 and an electrode portion 25. In FIG. 11, the main body portion 20 and the fixing member 29 are common to the electrically charged spray head 10 shown in FIG. 1. The electrically charged spray head 11 in FIG. 11 differs from FIG. 1 in both the nozzle portion 22 and the electrode portion 25. The diameter of the ring-shaped portion of the electrode portion 25 is smaller than that in FIG. 1, and is smaller than that in FIG. 9. Therefore, the arm portion 28 also has a different shape from that in FIGS. 1 and 9.

[0031] Fig. 12 shows a front view of the arm portion 28. The leg portion 40 of the arm portion 27 has the same shape as in Fig. 2. Therefore, the arm portion 28 can be fixed in the same manner to the main body portion of Fig. 11 which is the same as the main body portion 20 of Fig. 1. The arm portion 27 has an extension portion 43 which extends in a straight line from the leg portion 40 to the holding portion 48. The holding portion 48 extends further inward than that shown in Fig. 9, and can hold an electrode portion 25 with a smaller diameter.

[0032] FIG. 13 shows a cross-sectional view of the electrostatic spray head 12. In this electrostatic spray head 12, the leg portion 40 of the arm portion 28 is also located in the groove portion 31 of the main body portion 20 and is pressed and fixed by the fixing member 29. This allows the arm portion 28 and the electrode portion 25 to be easily attached and detached. In addition, a through hole 48a is formed in the holding portion 48 of the arm portion 28 along the direction from the front to the back. The through hole 48a can prevent water from accumulating between the electrode portion 25 and the arm portion 28. In addition, the through hole 48a can lengthen the edge surface distance of the arm portion 28, thereby lengthening the path of current leaking on the surface of the arm portion 28.

[0033] In this way, by using the common main body 20 and fixing member 29 to allow multiple types of nozzles and electrodes to be combined as desired, the types of nozzles and electrodes can be easily changed depending on the application and purpose. Also, when the electrodes need to be replaced due to deterioration over time, they can be easily replaced without removing the main body 20 from the installation location. Furthermore, the use of common parts can reduce costs.

[0034] Although the embodiment of the present invention has been described above, the application of the present invention is not limited to the embodiment, and the present invention can be applied in various ways within the scope of its technical concept. [Explanation of symbols]

[0035] 10 Electrostatic spray head 11 Electrostatic spray head 12 Electrostatic spray head 20 Main body 21 Nozzle section 22 Nozzle section 23 Electrode section 24 Electrode section 25 Electrode part 26 Arm section 27 Arm section 28 Arm section 29 Fixing member 30 Front part 31 Groove 31a Outer surface 31b Bottom 31c Inner surface 32d Threaded part 33 Nozzle attachment part 35 Fixed surface part 36 Piping storage section 37 Spray agent side electrode part 38a Fixing hex nut 37b Fixing hole 40 Legs 41 Support 42 Pressing part 43 Extension 44 Tapered surface 46 Extension 48 Holding part 48a through hole 50 First member 51 Notch 55 Second member 56 Fitting part 56a Threaded part 57 Edge 60 Piping section 61 Cover member

Claims

1. A main body portion, A nozzle portion, one of a plurality of types of nozzles being selected and attached to the main body portion; an electrode portion, one of a plurality of types of electrodes being selected and disposed in front of the nozzle portion; A plurality of arm portions, one of which is selected from a plurality of types to match the electrode portion, and which hold the electrode portion; a fixing member that fixes the arm portion to the main body portion; having The main body portion has a space on the rear side opposite to the front side where the nozzle portion is attached, and a plurality of fixing holes are provided along the circumferential direction at the rear side of the space, and one of the fixing holes is selected to connect wiring drawn in from the outside, forming an electrostatic spray head.

2. the main body has a groove formed along a circumferential direction on a front surface thereof facing the electrode portion, The arm portion has a leg portion disposed in the groove portion, The electrostatic spray head according to claim 1, wherein the fixing member has an engaging portion that moves the fixing member back and forth along the depth direction of the groove portion, and the engaging portion causes the fixing member to press the leg portion toward the back side of the groove portion to fix it.

3. the arm portion has a fulcrum portion provided on an outer periphery of the leg portion and abutting a bottom surface of the groove portion, a pressing portion provided on an inner periphery of the leg portion and pressed by the fixing member, and a holding portion on the inner periphery thereof for holding the electrode portion, The electrostatic spray head according to claim 2 , wherein the pressing portion is pressed by the fixing member, so that the arm portion is inclined with the holding portion side toward the inner periphery side about the fulcrum portion.

4. the fixing member includes a first member that fits along the groove and a second member that has the fitting portion and presses the first member, The electrostatic spraying head according to claim 2 or 3, wherein the first member has a plurality of cutouts in a circumferential direction for receiving the arm portions.

5. The electrostatic spraying head according to claim 4 , wherein the fitting portion of the second member is formed by a threaded portion that screws into the main body portion.

6. An electrostatic spray head as described in any one of claims 1 to 5, wherein at least one of the multiple types of arm portions is provided with a holding portion on the inner circumference side for holding the electrode portion, and a through hole is formed in the holding portion along the direction from the front to the back.

Images