How to assemble the electrostatic spray head

Abstract

To enable an assemble work of main parts of a charging spray head to be simply and easily performed.SOLUTION: A charging spray head includes, as main parts: a main body part 12; a water-side electrode part 14; a liquid conduit part 18; and an electrode connection part 16. An assembly method thereof comprises: a first step of inserting the water-side electrode part 14 into an electrode mounting hole 1210 of the main body part 12 from a flow-out side, and holding the water-side electrode part 14 in the main body part 12 with a hexagonal opening 1220 of an electrode mounting hole 1210 and a hexagonal bolt surface 1420 of the water-side electrode part 14; a second step of arranging the liquid conduit part 18 to be aligned with the water-side electrode part 14 exposed toward a flow-in side from the electrode mounting hole 1210; and a third step of inserting the electrode connection part 16 through the liquid conduit part 18 from the flow-in side, and fitting an inner threaded part 1630 of the electrode connection part 16 onto an external threaded part 1430 of the water-side electrode part 14, so as to attach and fix the water-side electrode part 14, together with the liquid conduit part 18, to the electrode mounting hole 1210.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a method for assembling an electrostatic spray head that charges and sprays fine particles of a liquid. [Background technology]

[0002] Conventionally, charged spray heads that charge and spray fine particles of liquid such as water can spray charged liquid particles with an average particle diameter of 10 to 300 μm, and are installed in fire extinguishing equipment in target areas such as buildings. The sprayed charged liquid particles electrically adsorb smoke generated by a fire, thereby eliminating the smoke, and the charged liquid particles electrically adhere to the target object, thereby increasing fire extinguishing efficiency. Furthermore, at building demolition sites, for example, the charged liquid particles can electrically adsorb dust suspended in the air, thereby removing the dust from the air.

[0003] Figure 17 shows a cross-sectional view of the structure of a conventional electrically charged spray head. As shown in Figure 17, the electrically charged spray head 100 comprises a main body 120, a water-side electrode 140, an electrode connector 160, a liquid conduit 180, a main body cover 200, a nozzle 220, an induction electrode 240, and an arm 260.

[0004] 17, the X, Y, and Z directions are perpendicular to each other, and specifically, the Y axis direction is the flow direction of water passing through the charged spray head 100 and the up-down direction, the X direction is the left-right direction, and the Z direction is the front-to-back direction. Also, the +X side in the X direction is the right side and the -X side is the left side, the +Y side in the Y direction is the upper side and the -Y side is the lower side, and the +Z side in the Z direction is the front side and the -Z side is the rear side.

[0005] Furthermore, since the Y-axis direction, which is the vertical direction, is the direction in which water flows through the head, the upper +Y side is sometimes referred to as the inflow side, and the lower -Y side is sometimes referred to as the outflow side. This also applies to the X, Y, and Z directions in Figures 1 to 16, 18, and 19, which illustrate embodiments of the present invention. Note that the X, Y, and Z directions are relative directions that change depending on the installation state of the electrically charged spraying head 100 in the spraying target area.

[0006] The main body 120, liquid conduit 180, main body cover 200, nozzle 220, and arm 260 are insulators made of an insulating material such as polyvinyl chloride resin. The water electrode 140 and electrode connector 160 are conductors made of a conductive material such as metal.

[0007] An electrode mounting hole 121 is formed inside main body 120, penetrating in the direction of water flow (up and down), which is the direction of head axis 350. Water side electrode 140 is fitted into electrode mounting hole 121 from the outlet side, and liquid conduit 180 is fitted into main body 120 from the inlet side via terminal chamber 124 formed on the inlet side of main body 120. Electrode connecting portion 160 is threaded into water side electrode 140 through liquid conduit 180, thereby attaching and fixing water side electrode 140 to electrode mounting hole 121 and connecting and fixing liquid conduit 180 to water side electrode 140.

[0008] The electrode connecting portion 160 is provided with a plurality of screw holes 164, and allows the terminal of an earth cable inserted via a waterproof connector to be connected to an electrode connector mounting hole 127 formed on the left and right sides of the terminal chamber 124. The upper part of the liquid conduit portion 180 is taken out to the outside through the main body cover portion 200, and water is supplied from an external water supply pump or the like.

[0009] Nozzle section 220 is provided at the end of the outlet side of water-side electrode section 140, which is arranged along the head axial direction (vertical direction) of main body section 102, and water particles with an average particle diameter of 10 to 300 μm are emitted from nozzle section 220. In the open space on the outlet side of nozzle section 220, induction electrode section 240 is held by arm section 260, and the emitted water particles are charged. Induction electrode section 240 is formed by insulating a conductive electrode core material. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-106405 [Patent Document 2] Japanese Patent Application Publication No. 2018-183712 Summary of the Invention [Problem to be solved by the invention]

[0011] In the assembly process for manufacturing a conventional electrocharged spray head, as shown in the exploded assembly view of Figure 18, water side electrode section 140 is fitted into electrode mounting hole 121 of main body section 120 from the outlet side, and then, with liquid conduit section 180 positioned on the inlet side of water side electrode section 140, electrode connecting section 160 is passed through the through-hole of electrode connecting section 160 and fitted into the inlet side of main body section 120, and electrode connecting section 160 is screwed and fixed to the threaded section at the tip of water side electrode section 140 exposed at the upper opening of electrode mounting hole 121, thereby attaching and fixing water side electrode section 140 to electrode mounting hole 121 and connecting and fixing liquid conduit section 180 to water side electrode section 140. Thereafter, the liquid conduit section 180 is passed through the through-hole of the main body cover section 200 and the main body cover section 200 is screwed onto the main body section 120 to attach and secure the main parts of the charged spray head shown in Figure 19 (main body section 120, water side electrode section 140, electrode connecting section 160, liquid conduit section 180 and main body cover section 200).

[0012] However, in the assembly work of attaching and fixing the water side electrode section 140 together with the liquid conduit section 180 to the electrode mounting hole 121 of the main body section 120 of such a conventional electrostatic spray head using the electrode connecting section 160, when the water side electrode section 140 is inserted into the electrode mounting hole 121, the lower end of the water side electrode section 140, which protrudes slightly below the main body section 120, must be held in place with a tool such as radio pliers to prevent it from turning, and then the electrode connecting section 160, which has been passed through the liquid conduit section 180 located above the water side electrode section 140, must be screwed in.Furthermore, because the electrode connecting section 160 is cylindrical, the part of the electrode connecting section 160 that protrudes slightly above must be pinched and turned with another tool such as radio pliers, resulting in the problem of complicated assembly work that is time-consuming and labor-intensive.

[0013] Furthermore, even when the water side electrode section 140 is attached and fixed together with the liquid conduit section 180 to the electrode attachment hole 121 of the main body section 120 using the electrode connecting section 160, and then the main body cover section 200 is attached and fixed to the main body section 120 by passing the main body cover section 200 through the liquid conduit section 180, the main body cover section 200 is circular, so it is necessary to pinch and turn it with a tool such as pliers, making the assembly process complicated, and there is a risk that the main body cover section 200 will be scratched or damaged if the work is not performed carefully.

[0014] SUMMARY OF THE INVENTION An object of the present invention is to provide a method for assembling an electrostatic spray head that allows the assembly of the main parts of the electrostatic spray head to be performed simply and easily. [Means for solving the problem]

[0015] (Assembling the electrostatic spray head 1) The present invention provides a method for assembling an electrically charged spray head that sprays electrically charged liquid particles onto a target area, comprising the steps of: The electrostatic spray head has at least a main body; a water-side electrode portion that serves as one of the electrodes when a predetermined voltage is applied to charge the liquid particles to be sprayed; a liquid conduit portion through which a liquid to be sprayed flows from the outside; an electrode connector for connecting a power source for applying a predetermined voltage to the water-side electrode; Equipped with a first step of inserting the water-side electrode part from the outlet side into an electrode mounting hole in a space formed through the main body part, and holding the water-side electrode part in the main body part by a structure that prevents the water-side electrode part from coming out of or rotating relative to the electrode mounting hole in the main body part; a second step of arranging the liquid conduit portion in alignment with the end of the water-side electrode portion exposed on the inlet side through the electrode mounting hole; a third step of inserting the fitting portion of the electrode connecting portion into the fitting receiving portion at the end of the water-side electrode portion through the opening formed with the fitting portion of the electrode connecting portion from the inlet side of the liquid conduit portion, thereby fixing the water-side electrode portion to the electrode mounting hole and connecting the liquid conduit portion to the water-side electrode portion; The present invention is characterized by comprising:

[0016] (Structure to prevent slipping and rotation) The structure that prevents the water electrode from coming loose or rotating relative to the electrode mounting hole on the main body is as follows: a hexagon bolt surface formed at a predetermined position between the outlet side and the inlet side of the water-side electrode; a hexagonal opening formed on the outlet side of the electrode mounting hole into which the hexagonal bolt surface is fitted; It consists of:

[0017] (How to assemble the electrostatic spray head 2) The present invention provides a method for assembling an electrically charged spray head that sprays electrically charged liquid particles onto a target area, comprising the steps of: The electrostatic spray head has at least a main body; a water-side electrode portion that serves as one of the electrodes when a predetermined voltage is applied to charge the liquid particles to be sprayed; a liquid conduit portion through which a liquid to be sprayed flows from the outside; an electrode connector for connecting a power source for applying a predetermined voltage to the water-side electrode; Equipped with The main body has a space formed therethrough, and an electrode mounting hole having a cylindrical opening on the inlet side and a hexagonal opening on the outlet side is formed in the space formed therethrough, The water-side electrode portion has an internal flow path formed therethrough, a fitting receiving portion formed at the end of the inlet side, and a hexagonal bolt surface formed at a predetermined position between the outlet side and the inlet side to fit into the hexagonal opening of the electrode mounting hole. the liquid conduit section is formed with an internal flow path passing therethrough, the internal flow path being disposed coaxially with the axis of the internal flow path of the water electrode section after assembly; the electrode connecting portion has a through-hole formed therethrough, the through-hole having a fitting portion on the outflow side that fits into the fitting receiving portion of the water-side electrode portion, and the outer periphery of the electrode connecting portion has a hexagonal nut surface that can be accommodated in the cylindrical opening of the electrode mounting hole; a first step of inserting the water-side electrode into the electrode mounting hole of the main body from the outflow side and fitting the hexagonal bolt surface of the water-side electrode into the hexagonal opening of the electrode mounting hole to prevent the water-side electrode from coming off or rotating relative to the electrode mounting hole and hold the water-side electrode in place on the main body; a second step of arranging the liquid conduit section at the end of the water-side electrode section exposed at the cylindrical opening of the electrode mounting hole so that the axis of the internal flow path of the water-side electrode section and the axis of the internal flow path of the liquid conduit section are coaxial; a third step of inserting the through-hole of the electrode connecting part into the liquid conduit part from the inlet side, and using a predetermined tool to fit the fitting part of the electrode connecting part into the fitting receiving part of the water-side electrode part against the hexagonal nut surface of the electrode connecting part, thereby attaching and fixing the water-side electrode part to the electrode mounting hole and connecting and fixing the liquid conduit part to the water-side electrode part; The present invention is characterized by comprising:

[0018] (Height of the hexagonal nut surface of the electrode connection part) The height of the hexagonal nut surface of the electrode connecting part, which is the insertion direction of the water side electrode part, is set to a predetermined height that exceeds the depth of the cylindrical opening of the electrode mounting hole in the insertion direction and allows a specified tool to be used on the hexagonal nut surface exposed from the cylindrical opening.

[0019] (Assembly of the main body cover) Furthermore, A terminal chamber having a fitting receiving portion is formed on the inlet side of the electrode mounting hole in the space formed through the main body, The electrostatic spray head includes a main body cover that closes the opening on the inlet side of the terminal chamber, The main body cover has a through hole formed therethrough, a fitting portion that fits into the fitting receiving portion of the terminal chamber formed on the outflow side, and a lid portion having a portion on the outer periphery that is a hexagonal nut surface formed on the inflow side. The fourth step includes passing the through hole of the main body cover part through the liquid conduit part from the inlet side, and using a specified tool on the hexagonal nut surface of the main body cover part to fit the fitting part of the main body cover part into the fitting receiving part of the terminal chamber, thereby closing the opening on the inlet side of the terminal chamber.

[0020] (spanner) Use a wrench as the designated tool.

[0021] (Materials of the main body, liquid conduit, water electrode, electrode connector, and main body cover) The main body, liquid conduit and main body cover are made of soft insulating materials, while the water electrode and electrode connector are made of conductive materials. [Effects of the Invention]

[0022] (Effect of Assembly Method 1 of the Electrostatic Spray Head) Method 1 for assembling an electrostatic spray head includes a first step of inserting the water-side electrode part from the outflow side into the electrode mounting hole in the space formed through the main body part, and holding the water-side electrode part in the main body part by a structure that prevents the water-side electrode part from coming out or rotating relative to the electrode mounting hole in the main body part; a second step of arranging the liquid conduit part in accordance with the end of the water-side electrode part exposed from the electrode mounting hole to the inflow side; and a second step of fitting the fitting part of the electrode connecting part into the fitting receiving part at the end of the water-side electrode part through an opening formed in the liquid conduit part from the inflow side, where the fitting part of the electrode connecting part is fitted into the fitting receiving part at the end of the water-side electrode part, thereby attaching and fixing the water-side electrode part to the electrode mounting hole and connecting the liquid conduit part to the water-side electrode part. As a result, the water side electrode part inserted into the electrode mounting hole of the main body part is constructed to prevent the water side electrode part from coming out or rotating relative to the electrode mounting hole of the main body part, for example by a hexagonal opening in the electrode mounting hole and a hexagonal bolt surface on the water side electrode part, and by fitting the hexagonal bolt surface into the hexagonal opening, the water side electrode part is prevented from coming out or rotating relative to the electrode mounting hole of the main body part.This eliminates the need to hold the inlet side of the water side electrode part with a tool to prevent the water side electrode part from coming out or rotating, as in conventional assembly work, making assembly work simpler and easier than conventional assembly work.

[0023] (Effect of Assembly Method 2 of the Electrostatic Spray Head) In addition, in assembly method 2 of the electrostatic spray head, the first step is to insert the water-side electrode part into the electrode mounting hole of the main body part from the outlet side and fit the hexagonal bolt surface of the water-side electrode part into the hexagonal opening of the electrode mounting hole, thereby preventing the water-side electrode part from coming out or rotating relative to the electrode mounting hole and holding the water-side electrode part on the main body part; the second step is to arrange the liquid conduit part at the end of the water-side electrode part exposed at the cylindrical opening of the electrode mounting hole so that the axis of the internal flow path of the water-side electrode part and the axis of the internal flow path of the liquid conduit part are coaxial; and the second step is to pass the through-hole of the electrode connecting part through the liquid conduit part from the inlet side and fit the hexagonal nut surface of the electrode connecting part using a specified tool. The method also includes a third step of fitting the mating portion into the mating receiving portion of the water side electrode portion to mount and fix the water side electrode portion in the electrode mounting hole and connect and fix the liquid conduit portion to the water side electrode portion.As a result, as with assembly method 1 of the charged spray head, there is no need to hold the inlet side of the water side electrode portion with a tool to prevent it from coming loose or rotating.Furthermore, instead of the electrode connecting portion having the conventional cylindrical shape which makes installation difficult, the outer circumference of the electrode connecting portion has a hexagonal nut surface, so that a specified tool, such as a wrench, can be used on the hexagonal nut surface, making assembly work simpler and more convenient than conventional assembly work.

[0024] (Effect of the height of the hexagonal nut surface of the electrode connection part) In addition, the height of the hexagonal nut surface of the electrode connecting part, which is the insertion direction of the water side electrode part, is set to a predetermined height that exceeds the depth of the cylindrical opening of the electrode mounting hole in the insertion direction and allows a predetermined tool to be used on the hexagonal nut surface exposed from the cylindrical opening.Therefore, when using a predetermined tool on the hexagonal nut surface to fit the fitting portion of the electrode connecting part into the fitting receiving portion of the water side electrode part, the upper side of the hexagonal nut surface is always sufficiently exposed from the cylindrical opening of the electrode mounting hole to allow the tool to be used, making it possible to perform assembly work more reliably than with conventional structures in which the water side electrode part only protrudes slightly.

[0025] (Effect of assembling the main body cover) Furthermore, even when the fourth step is included in which the through hole of the main body cover part is passed through the liquid conduit part from the inlet side and a specified tool is used on the hexagonal nut surface of the main body cover part to fit the fitting portion of the main body cover part into the fitting receiving portion of the terminal chamber to close the opening on the inlet side of the terminal chamber, since the main body cover part is formed with a lid part having a portion on its outer periphery that is a hexagonal nut surface, a specified tool can be used on the hexagonal nut surface, making it possible to assemble the main body cover part simply and easily.

[0026] (Spanner effect) In addition, a wrench is used as the specified tool, making it possible to perform assembly work with a simple and easy task of preparing and turning a wrench that corresponds to the size of the hexagonal nut surface of the electrode connection part or the hexagonal nut surface of the main body cover part.

[0027] (Effect of materials used for the main body, liquid conduit, water electrode, electrode connector, and main body cover) Because the main body, liquid conduit, and main body cover are soft insulators, and the water-side electrode and electrode connector are conductors, even if the water-side electrode and electrode connector are made of a conductor such as a hard metal, the reaction force caused by slight deformation of the liquid conduit and main body cover, which are soft insulators, allows for more secure attachment and fixation without the need for washers, etc. Furthermore, even between soft insulators such as the main body and main body cover, slight deformation increases frictional resistance, allowing for more secure attachment and fixation. [Brief explanation of the drawings]

[0028] [Figure 1] FIG. 2 is an explanatory diagram showing the front of the electrostatic spray head. [Figure 2] FIG. 2 is an explanatory diagram showing the top and bottom surfaces of the charging head. [Figure 3] FIG. 2 is a perspective view showing the electrically charged spraying head as viewed from the spraying side. [Figure 4] FIG. 2 is an explanatory diagram showing a cross section of the internal structure of the electrostatic spray head. [Figure 5] FIG. 2 is an explanatory diagram showing the charging head in an assembled and disassembled state. [Figure 6] FIG. 2 is an explanatory diagram showing the main body portion taken out. [Figure 7] FIG. 2 is a perspective view showing the main body portion removed. [Figure 8] FIG. 2 is an explanatory diagram showing the water-side electrode section. [Figure 9] FIG. 2 is an explanatory diagram showing the liquid conduit section. [Figure 10] FIG. 2 is an explanatory diagram showing an electrode connecting portion. [Figure 11] FIG. 2 is an explanatory diagram showing the main body cover removed. [Figure 12] FIG. 10 is an explanatory diagram showing assembly of the water-side electrode section to the main body section. [Figure 13] 13 is an explanatory view showing the assembly of the liquid conduit portion after assembly in FIG. 12. FIG. [Figure 14] 14 is an explanatory diagram showing the assembly of the electrode connector after assembly in FIG. 13. FIG. [Figure 15] 15 is an explanatory diagram showing the assembly of the main body cover portion after assembly in FIG. 14. FIG. [Figure 16] FIG. 10 is an explanatory diagram showing the main parts after assembly is complete, including the main body, water electrode, liquid conduit, electrode connector, and main body cover. [Figure 17] FIG. 1 is a cross-sectional view showing the internal structure of a conventional electrostatic spray head. [Figure 18] FIG. 1 is an explanatory diagram showing the main parts of a conventional electrostatic spray head in an assembled and disassembled state. [Figure 19] FIG. 1 is a cross-sectional view showing the main part of a conventional electrostatic spray head. DETAILED DESCRIPTION OF THE INVENTION

[0029] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings, in which: FIG.

[0030] [Basic concept of the embodiment] First, the basic concept of the embodiment will be described. The embodiment generally relates to a method for assembling an electrically charged spray head that sprays electrically charged liquid particles onto a spray target area.

[0031] Here, an "electrically charged spray head" is a device that sprays charged liquid particles onto a target spray area, and the configuration of the electrically charged spray head according to the present invention, which is configured to include at least a main body, a water-side electrode that serves as one of the electrodes when a predetermined voltage is applied to charge the liquid particles to be sprayed, a liquid conduit into which liquid to be sprayed flows from the outside, and an electrode connection that connects the water-side electrode to a power source for applying the predetermined voltage.

[0032] Furthermore, "charged liquid particles" are liquid particles that are charged and sprayed from a spray head, and are charged by an induction charging method in which, for example, a predetermined high voltage is applied from a high-voltage power supply device as a power source between the water-side electrode of the spray head and the other electrode, the induction electrode, and the potential of the induction electrode relative to the water-side electrode is adjusted to generate a high electric field in the induction electrode. The sprayed liquid may be any liquid that has smoke suppressing, fire extinguishing, dust removal, or other effects, and includes, for example, water that is connected to a liquid conduit through a pipe and supplied under pressure by an external water supply pump or the like.

[0033] Here, the assembly method 1 of the electrostatic spray head is as follows: a first step of inserting the water-side electrode part from the outlet side into an electrode mounting hole in a space formed through the main body part, and holding the water-side electrode part in the main body part by a structure that prevents the water-side electrode part from coming out of or rotating relative to the electrode mounting hole in the main body part; a second step of arranging the liquid conduit portion in alignment with the end of the water-side electrode portion exposed on the inlet side through the electrode mounting hole; a third step of inserting the fitting portion of the electrode connecting portion into the fitting receiving portion at the end of the water-side electrode portion through the opening formed with the fitting portion of the electrode connecting portion from the inlet side of the liquid conduit portion, thereby fixing the water-side electrode portion to the electrode mounting hole and connecting the liquid conduit portion to the water-side electrode portion; The present invention is characterized by comprising:

[0034] Here, the "inflow side" refers to the side of the assembled charged spray head from which liquid flows into the charged spray head from the outside, and the "outflow side" refers to the side of the assembled charged spray head from which charged liquid particles flow out of the charged spray head.

[0035] Furthermore, the "structure for preventing the water side electrode part from coming loose or rotating relative to the electrode mounting hole in the main body part" may be any structure that eliminates the need to hold the inlet side of the water side electrode part with a tool as in conventional assembly work, and may, for example, be composed of a hexagonal bolt surface formed at a predetermined position between the outlet and inlet sides of the water side electrode part, and a hexagonal opening formed on the outlet side of the electrode mounting hole into which the hexagonal bolt surface fits.

[0036] Furthermore, the "fitting-receiving portion" of the water-side electrode part and the "fitting portion" of the electrode connecting part can have any structure as long as the fitting portion and the fitting-receiving portion can mate with each other, and include, for example, a threaded portion in which the fitting portion has a male thread structure and the fitting-receiving portion has a female thread structure. When the fitting portion and the fitting-receiving portion are threaded portions, the portion with threads on the outer circumferential surface is called an "external thread portion" and the portion with threads on the inner circumferential surface is called an "internal thread portion." The same applies to other "fitting portions" and "fitting-receiving portions."

[0037] In the electrically charged spray head according to assembly method 2, the "main body" has a space formed therethrough, in which an electrode mounting hole having a cylindrical opening on the inlet side and a hexagonal opening on the outlet side is formed. The "water-side electrode" has an internal flow path formed therethrough, a fitting-receiving portion formed at the end of the inlet side, and a hexagonal bolt surface formed at a predetermined position between the outlet and inlet sides to fit into the hexagonal opening of the electrode mounting hole. The "liquid conduit" has an internal flow path formed therethrough that is positioned coaxially with the axis of the internal flow path of the water-side electrode after assembly. The "electrode connecting portion" has a through-hole formed therethrough, with a fitting portion on the outlet side that fits into the fitting-receiving portion of the water-side electrode, and its outer periphery is formed with a hexagonal nut surface that can be accommodated in the cylindrical opening of the electrode mounting hole.

[0038] A "cylindrical opening" is an opening whose inner periphery is cylindrical and whose diameter is larger than that of an electrode mounting hole, for example. A "hexagonal opening" is an opening whose inner periphery is hexagonal and whose diameter is larger than that of an electrode mounting hole, for example.

[0039] Also, the assembly method 2 of the electrostatic spray head is as follows: a first step of inserting the water-side electrode into the electrode mounting hole of the main body from the outflow side and fitting the hexagonal bolt surface of the water-side electrode into the hexagonal opening of the electrode mounting hole to prevent the water-side electrode from coming out of or rotating relative to the electrode mounting hole and hold the water-side electrode in place on the main body; a second step of arranging the liquid conduit section at the end of the water-side electrode section exposed at the cylindrical opening of the electrode mounting hole so that the axis of the internal flow path of the water-side electrode section and the axis of the internal flow path of the liquid conduit section are coaxial; a third step of inserting the through-hole of the electrode connecting part into the liquid conduit part from the inlet side, and using a predetermined tool, such as a wrench, to fit the fitting part of the electrode connecting part into the fitting receiving part of the water-side electrode part against the hexagonal nut surface of the electrode connecting part, thereby attaching and fixing the water-side electrode part to the electrode mounting hole and connecting and fixing the liquid conduit part to the water-side electrode part; The present invention is characterized by comprising:

[0040] In addition, the height of the hexagonal nut surface of the electrode connecting part, which is the insertion direction of the water side electrode part, is set to a predetermined height that exceeds the depth of the cylindrical opening of the electrode mounting hole in the insertion direction and allows a predetermined tool to be used on the hexagonal nut surface exposed from the cylindrical opening.

[0041] In addition, the assembly method of the "charged spray head" includes assembling the main body, water side electrode, liquid conduit, and electrode connection parts, as well as assembling the main body cover part, which is the fourth step following the first to third steps described above.

[0042] Here, in the fourth assembly step, a terminal chamber having a fitting receiving portion is formed on the inlet side of the electrode mounting hole in the space formed through the main body portion, a through hole is formed through the main body cover portion, a fitting portion that fits into the fitting receiving portion of the terminal chamber is formed on the outlet side, and a lid portion having a portion on the outer periphery that is a hexagonal nut surface is formed on the inlet side.

[0043] The fourth step is to pass the through hole of the main body cover part through the liquid conduit part from the inlet side, and use a specified tool, such as a wrench, on the hexagonal nut surface of the main body cover part to fit the fitting part of the main body cover part into the fitting receiving part of the terminal chamber, thereby closing the opening on the inlet side of the terminal chamber.

[0044] Furthermore, the "main body portion," "liquid conduit portion," and "main body cover portion" are insulators made of insulating material, and the "water side electrode portion" and "electrode connecting portion" are conductors made of conductive material, and the "main body portion," "liquid conduit portion," and "main body cover portion," which are insulators, may be soft insulators.

[0045] Furthermore, in the assembly method of the electrically charged spray head of the present invention, the "main body portion," "water side electrode portion," "liquid conduit portion," "electrode connection portion," and "main body cover portion" that the electrically charged spray head has are treated as the main portions of the electrically charged spray head.

[0046] In the following embodiments, the "charged spray head" is "composed of a main body, a water-side electrode, a liquid conduit, an electrode connector, a main body cover, a nozzle, an induction electrode, and an arm," the "structure for preventing the water-side electrode from coming loose or rotating relative to the electrode mounting hole in the main body" is "a structure formed by the hexagonal bolt surface of the water-side electrode and the hexagonal opening of the electrode mounting hole," the "engagement portion and engagement receiver" are "threaded portions," and the "charged liquid particles to be sprayed" are "charged water particles."

[0047] [Specific details of the embodiment] The specific contents of the embodiment will be described separately as follows. a. Structure of the electrostatic spray head b. Each component that makes up the main part of the electrostatic spray head b1.Main body b2.Water side electrode part b3.Liquid conduit section b4. Electrode connection part b5. Main body cover c. Assembly method for the main parts of the electrostatic spray head c1. Assembling the water electrode to the main body c2. Assembly of the liquid conduit c3. Assembly of electrode connection part c4. Assembling the main body cover d. Modifications of the present invention

[0048] [a. Structure of the electrostatic spray head] First, the structure of the electrically charged spray head will be described. In this description, reference will be made to Fig. 1, which shows the front (front face) of the electrically charged spray head, Fig. 2, which shows the plan (top face) and bottom (bottom face) of the electrically charged head, Fig. 3, which is a perspective view of the electrically charged spray head as seen from the outlet side, and Fig. 4, which shows a cross section of the internal structure of the electrically charged spray head. Fig. 2(A) shows the plan view, and Fig. 2(B) shows the bottom face. Fig. 4 also shows the cross section taken along the cutting line aa in Fig. 2(A).

[0049] As shown in Figures 1 to 4, the embodiment of the electrically charged spray head 10 is composed of a main body portion 12, a water side electrode portion 14, an electrode connecting portion 16, a liquid conduit portion 18, a main body cover portion 20, a nozzle portion 22, an induction electrode portion 24, and an arm portion 26.

[0050] The main body 12, liquid conduit 18, main body cover 20, nozzle 22, and arm 26 are insulators made of insulating materials, such as polyvinyl chloride resin, polyphenylene sulfide resin, urethane resin, polytetrafluoroethylene resin, polychlorotrifluoroethylene resin, ceramics (alumina ceramics), glass enamel, etc.

[0051] The water-side electrode portion 14 and the electrode connecting portion 16 are conductors made of conductive materials, which are typically metals, but other conductive materials such as resins, fiber bundles, rubber, etc. may also be used, or a composite made up of a combination of these materials may also be used.

[0052] As shown in the cross section of Figure 4, an electrode mounting hole 1210 is formed inside main body 12 and extends in the direction of head axis 35 (up and down), which is the direction of water flow. Water-side electrode 14 is inserted into electrode mounting hole 1210 from the outlet side (bottom). Liquid conduit 18 is placed in terminal chamber 1240 formed on the inlet side (top) of electrode mounting hole 1210. Electrode connecting portion 16, inserted through liquid conduit 18, is screwed onto the upper end of water-side electrode 14 exposed from electrode mounting hole 1210 to terminal chamber 1240, thereby attaching and fixing water-side electrode 14 to electrode mounting hole 1210 and connecting and fixing the outlet side of liquid conduit 18 to the inlet side of water-side electrode 14.

[0053] A plurality of screw holes 1640 are formed in the electrode connection portion 16, and the terminal of the earth cable inserted via a waterproof connector attached to an electrode connector mounting hole 1270 formed laterally (perpendicular to the up-down direction, or to the right in Figure 4) relative to the terminal chamber 1240 of the main body portion 12 is fixed and connected to one of the screw holes 1640 with a screw.

[0054] Liquid conduit section 18 is exposed to the outside through body cover section 20 provided at the opening on the inlet side of terminal chamber 1240, and water pressurized by an external water supply pump or the like is supplied to liquid conduit section 18. The pressure of the water supplied to liquid conduit section 18 is adjusted within the range of 0.1 to 1.0 MPa, for example.

[0055] Nozzle unit 22 is attached to the outlet side (lower end side) of water-side electrode unit 14, which is attached along the direction of head axis 35 of main body unit 12. Nozzle unit 22 has nozzle holes 2210 formed therein, as shown in Fig. 3, and emits water particles having a predetermined average particle diameter, for example, an average particle diameter of 10 to 300 µm.

[0056] In the open space on the outlet side of the nozzle 22, the induction electrode 24 is arranged using three arms 26, as shown in Fig. 3, for example. The induction electrode 24 is, for example, ring-shaped, and is formed by covering a conductive electrode core 2410 with an insulating coating 2420, as shown in the cross section of Fig. 4, with a support 2440 extending laterally (a direction perpendicular to the up-down direction, or leftward in Fig. 1) from a predetermined position on the ring and then extending upward, and a cable connection 2450 is exposed from the tip of the support 2440 and connected to the electrode core 2410 inside the ring, and a voltage application cable is connected to the cable connection 2450.

[0057] The electrode core material 2410 of the induction electrode portion 24 is a conductor made of a conductive material, and metal is used as the conductive material, but other than metal, conductive resin, fiber bundle, rubber, etc. may also be used, and a composite of these materials may also be used.

[0058] The insulating material of the insulating coating 2420 of the induction electrode portion 24 is, for example, polyvinyl chloride resin, polyphenylene sulfide resin, urethane resin, polytetrafluoroethylene resin, polychlorotrifluoroethylene resin, ceramics (alumina ceramics), glass enamel, or the like.

[0059] 4, the ring portion of induction electrode 24 is held at a predetermined position in the open space on the outlet side of nozzle 22 by arm 26, fixed portion 28, and fixed plate 30. A fulcrum portion 2610 on the outer side of the upper end of arm 26 abuts against an outer corner portion of groove 1280 of main body 12, and a pressing portion 2620 on the inner side of the upper end of arm 26 is floating above groove 1280.

[0060] When fixing portion 28 is turned and screwed into groove 1280 (upper side), fixing plate portion 30 is pressed upward, and pressing portions 2620 of arm portion 26 are pressed toward groove 1280. As a result, arm portion 26 rotates around fulcrum portion 2610, and holding portions 2630 tilt inward. Then, as three arms 26 tilt, the ring portions of induction electrode 24 are pressed at three points by holding portions 2630 of arm portion 26, and induction electrode 24 is held in a state where the ring central axis is centered on head axis 35.

[0061] When the terminal of the earth cable is connected to one of the screw holes 1640 of the electrode connection part 16 and the voltage application cable is connected to the cable connection part 2450 of the induction electrode part 24, a predetermined voltage in the range of +0.5 kV to +20 kV or -0.5 kV to -20 kV is applied as a DC voltage, AC voltage, pulse voltage, etc. between the water-side electrode part 14 and the induction electrode part 24 as a predetermined adjustment range within the voltage range in which water particles can be charged, and a predetermined external electric field is formed around the ring part of the induction electrode part 24, and the water particles released from the nozzle part 22 and passing through the ring part of the induction electrode part 24 are charged and dispersed.

[0062] For example, when a DC voltage is applied between water-side electrode unit 14 and induction electrode unit 24, negatively charged water particles are generated if the polarity of induction electrode unit 24 is positive when water-side electrode unit 14 is set to the reference potential (earth potential, 0 V), and positively charged water particles are generated if the polarity of induction electrode unit 24 is negative when water-side electrode unit 14 is set to the reference potential (earth potential, 0 V). Furthermore, if the voltage applied between water-side electrode unit 14 and induction electrode unit 24 is in the range of +0.5 kV to +20 kV or -0.5 kV to -20 kV, spark discharge is prevented, and charged water particles are generated while ensuring safety.

[0063] When the electrically charged spray head 10 is used at a building demolition site or the like to remove dust from the air, the charged water particles sprayed from the electrically charged spray head 10 electrically adsorb and capture dust floating in the air, causing the dust to fall and be removed from the air. Also, when the electrically charged spray head 10 is installed in a fire extinguishing system, the charged water particles sprayed from the electrically charged spray head 10 electrically adsorb and capture smoke particles floating in the air, causing the smoke particles to fall, thereby achieving a smoke-extinguishing effect, and the electrically adsorbing charged water particles to the object to be extinguished can improve fire extinguishing performance.

[0064] [b. Components that make up the main part of the electrostatic spray head] This embodiment is intended to explain a method for assembling an electrically charged spray head, and in particular, to provide a method for assembling the main parts of the electrically charged spray head. Therefore, the components that make up the main parts of the embodiment will be described. The components that make up the main parts of the electrically charged spray head 10 that are the subject of the assembly method of the embodiment are the main body 12, water-side electrode 14, electrode connector 16, liquid conduit 18, and main body cover 20, as shown in the exploded assembly diagram of the electrically charged spray head 10 in Figure 5.

[0065] (b1. Main body) First, the main body of the electrostatic spray head will be described. In this description, reference will be made to Figures 6 and 7, which show the main body removed. Note that Figure 6(A) shows the top (top) of the main body, Figure 6(B) shows the front (front) of the main body, Figure 6(C) shows the bottom (lower) of the main body, and Figure 6(D) shows a cross section taken along line bb in Figure 6(A). Also, Figure 7(A) shows a perspective view of the main body from the outflow side, and Figure 7(B) shows a perspective view of the main body from the inflow side.

[0066] 6 and 7, main body 12 is manufactured by injection molding using an insulating material, such as polyvinyl chloride resin. A terminal chamber 1240 is formed on the inlet side (upper side) of main body 12, and an electrode mounting hole 1210 is formed below terminal chamber 1240, penetrating in the axial direction of the head (vertical direction) for mounting and securing water side electrode 14. The electrode mounting hole 1210 may have any shape, but at least a cylindrical opening 1230 is formed on the upper end (inlet side) and a hexagonal opening 1220 is formed on the lower end (outlet side). A seal 1222 is disposed on the lower end surface of hexagonal opening 1220, and an arm fixing screw 1290 is formed on the outer periphery of the lower end surface of hexagonal opening 1220, which is used to hold arm 26 in groove 1280.

[0067] Hexagonal opening 1220 is an opening with a hexagonal inner circumferential surface and a predetermined depth. Cylindrical opening 1230 is an opening with a cylindrical inner circumferential surface and a predetermined depth (H1). Terminal chamber 1240 is an opening with a cylindrical inner circumferential surface that is larger in diameter than cylindrical opening 1230 and has a predetermined depth, and an internal thread portion 1250 is formed on the inside of the opening.

[0068] The hexagonal opening 1220 and cylindrical opening 1230 formed in the electrode mounting hole 1210 in this manner are the structures necessary to realize the assembly method of this embodiment.

[0069] Furthermore, in the main body 12, an electrode connector mounting hole 1270 used to connect an earth cable is formed in the lateral direction (a direction perpendicular to the up-down direction, or to the right in FIG. 6 ) of the terminal chamber 1240, and a groove 1280 for holding the arm 26 used to hold the induction electrode 24 is formed in the lower end face on the outflow side of the main body 12. Furthermore, fixing surface portions 1260 are formed in three separate locations on the front, back, and left side of the outer circumferential surface of the main body 12, and four screw holes 1262 are provided in the fixing surface portion 1260.

[0070] (b2. Water side electrode part) Next, the water-side electrode part of the electrostatic spray head will be described. In this description, reference will be made to Figure 8, which shows the water-side electrode part. Note that Figure 8(A) shows the top view, Figure 8(B) shows the front view, Figure 8(C) shows the bottom view, and Figure 8(D) shows the cross section taken along line cc in Figure 8(B).

[0071] 8, water-side electrode 14 is made of a conductive material, such as a conductive metal, and has an internal flow path 1410 formed therethrough in the axial direction of the head (vertical direction), an external thread 1430 formed on the outer periphery of the upper end (on the inflow side), and a hexagonal bolt surface 1420 formed at a predetermined position in the middle of the outer periphery. When water-side electrode 14 is inserted into electrode mounting hole 1210 of main body 12 shown in FIGS. 6 and 7 from the outflow side (bottom), hexagonal bolt surface 1420 fits into hexagonal opening 1220 formed in electrode mounting hole 1210 of main body 12, providing a structure that prevents water-side electrode 14 from slipping out or rotating relative to electrode mounting hole 1210.

[0072] Furthermore, when the water side electrode part 14 is inserted into the electrode mounting hole 1210 of the main body part 12 shown in Figures 6 and 7 from the outflow side (bottom), the external threaded part 1430 of the water side electrode part 14 is exposed to the cylindrical opening 1230 of the main body part 12 and receives the screwing of the electrode connecting part 16 described later.

[0073] The hexagonal bolt surface 1420 and external thread 1430 formed on the water side electrode 14 are the structures necessary to realize the assembly method of this embodiment. Also, the lower end of the water side electrode 14 is formed with an external thread 1440 and an internal thread 1450 used to attach and secure the nozzle 22.

[0074] (b3.Liquid conduit section) Next, the liquid conduit section of the electrostatic spray head will be explained. In this explanation, reference will be made to Figure 9, which shows the liquid conduit section. Note that Figure 9(A) shows the front (front surface), Figure 9(B) shows the bottom (lower surface), and Figure 9(C) shows a cross section taken along cutting line dd in Figure 9(A).

[0075] As shown in FIG. 9, the liquid conduit portion 18 is manufactured by injection molding using an insulating material such as polyvinyl chloride resin, and an internal flow path 1810 is formed inside the liquid conduit portion 18 in the axial direction of the head (vertical direction), and from the upper end side which is the inflow side to the lower end side which is the outflow side, an external thread portion 1850 is first formed at the upper end, and then the diameter is expanded by a step portion 1820, and then a seal 1840 is placed in a seal groove formed on the outer periphery, and a flange portion 1830 is formed at the lower end, and a seal groove is formed below the flange portion 1830, and the seal 1840 is placed in the seal groove.

[0076] Flange portion 1830 and seal 1840 located below it are used to seal the lower end of liquid conduit portion 18 relative to the inlet opening (upper end opening) of internal flow path 1430 of water-side electrode portion 14 shown in Figure 8. Step portion 1820 and seal 1840 located below it are used to position and seal when body cover portion 20, described below, is passed through liquid conduit portion 18 and attached and fixed to terminal chamber 1240 of body portion 12 to close the inlet-side opening of terminal chamber 1240.

[0077] (b4. Electrode connection part) Next, the electrode connection part of the electrostatic spray head will be explained. In this explanation, reference will be made to Figure 10, which shows the electrode connection part. Note that Figure 10(A) shows a plan view (top surface), Figure 10(B) shows a front view (front surface), and Figure 10(C) shows a cross section taken along the cutting line ee in Figure 10(A).

[0078] 10, the electrode connecting portion 16 is made of a conductive material, for example, a conductive metal, and has a hexagonal nut surface 1610 on its outer periphery, with a through-hole 1620 formed therein with an internal thread 1630. The electrode connecting portion 16 forms the hexagonal nut surface 1610 so as to be sized to fit into the cylindrical opening 1230 formed in the electrode mounting hole 1210 of the main body 12 in FIGS. 6 and 7, and the predetermined height (H2) in the head axial direction (vertical direction) is set to a predetermined height that exceeds the depth (H1) of the cylindrical opening 1230 in the head axial direction (vertical direction), for example, H2 = 1.5 * H1.

[0079] When the water side electrode part 14 is inserted from the outflow side into the electrode mounting hole 1210 of the main body part 12 shown in Figures 6 and 7, the electrode connecting part 16 attaches and fixes the water side electrode part 14 together with the liquid conduit part 18 to the electrode mounting hole 1210 by screwing the internal thread part 1630 into the external thread part 1430 at the upper end of the water side electrode part 14 exposed in the cylindrical opening 1230 formed on the inflow side of the electrode mounting hole 1210.By having a height H2 that exceeds the depth H1 of the cylindrical opening 1230, the upper side of the hexagonal nut surface 1610 is always fully exposed from the cylindrical opening 1230, allowing tools such as wrenches to be used at all times.

[0080] In this way, the hexagonal nut surface 1610 having a height H2 greater than the depth of the tube opening 1230 formed in the electrode connecting portion 16 is a necessary structure for realizing the assembly method of this embodiment. Furthermore, the electrode connecting portion 16 is formed with multiple, for example, six, screw holes 1640 for connecting the terminal of the earth cable drawn in via a waterproof connector. Therefore, even if the length of the drawn-in earth cable is not constant, it is possible to connect the terminal to any of the screw holes 1640 that matches the cable length.

[0081] (b5. Main body cover) Finally, the main body cover of the electrostatic spray head will be described. In this description, reference will be made to Figure 11, which shows the main body cover removed. Note that Figure 11(A) shows the plan view (top), Figure 11(B) shows the front view (front), and Figure 11(C) shows the cross section taken along the cutting line ff in Figure 11(B).

[0082] As shown in FIG. 11, the main body cover portion 20 is manufactured by injection molding of an insulating material, for example, polyvinyl chloride resin, and has a lid portion 2010 formed on the inlet side with a through hole 2020 formed therethrough and a protrusion formed on the outer periphery as a hexagonal nut surface 2012, and an external thread portion 2030 formed on the side surface on the outlet side which screws into an internal thread portion 1250 provided on the inside of the opening of the terminal chamber 1240 of the main body portion 12 shown in FIGS. 6 and 7, and a seal 2040 is placed in a seal groove formed between the lid portion 2010 and the external thread portion 2030.

[0083] The main body cover portion 20 closes the opening on the inlet side of the terminal chamber 1240 by passing the liquid conduit portion 18 shown in Figure 9 through the through hole 2020 and screwing the external thread portion 2030 into the internal thread portion 1250 inside the opening of the terminal chamber 1240 of the main body portion 12 shown in Figures 6 and 7, and the hexagonal nut surface 2012 formed on the top of the lid portion 2010 is the structure necessary to realize the assembly method of this embodiment.

[0084] [c. Assembly method for the main parts of the electrostatic spray head] Next, a method for assembling the main parts of the electrostatic spray head of this embodiment will be described with reference to Figure 12, which shows the assembly of the water-side electrode part to the main body part, Figure 13, which shows the assembly of the liquid conduit part after assembly of Figure 12, Figure 14, which shows the assembly of the electrode connector part after assembly of Figure 13, Figure 15, which shows the assembly of the main body cover part after assembly of Figure 14, and Figure 16, which shows the main parts after assembly of the main body part, water-side electrode part, liquid conduit part, electrode connector part, and main body cover part has been completed.

[0085] (c1. Assembly of the water electrode to the main body) First, we will explain the first step, assembling the water side electrode unit to the main body. As shown in Fig. 12, to assemble the water side electrode unit 14 to the main body 12, the water side electrode unit 14 is inserted into the electrode mounting hole 1210 of the main body 12 from the outlet side (bottom). This causes the hexagonal bolt surface 1420 of the water side electrode unit 14 to fit into the hexagonal opening 1220 formed at the bottom end of the electrode mounting hole 1210, preventing the water side electrode unit 14 from slipping out of the electrode mounting hole 1210 of the main body 12 and preventing it from rotating around the head axis, as shown in Fig. 13. After inserting the water side electrode unit 14 into the electrode mounting hole 1210, the external thread portion 1430 at the top end of the water side electrode unit 14 is exposed in the cylindrical opening 1230 formed at the top end of the electrode mounting hole 1210 of the main body 12.

[0086] (c2. Assembly of the liquid conduit section) Next, the second step, assembly of the liquid conduit section, will be described. As shown in Fig. 13, liquid conduit section 18 is assembled by inserting the lower end of liquid conduit section 18, with seal 1840 located below flange 1830, into internal flow path 1410 on the upper end side of water electrode section 14, which is exposed at cylindrical opening 1230 of main body 12, and then, as shown in Fig. 14, liquid conduit section 18 is positioned on the inlet side (upper side) of water electrode section 14 so that internal flow path 1410 of water electrode section 14 and internal flow path 1810 of liquid conduit section 18 are coaxial.

[0087] (c3. Assembly of electrode connection part) Next, the third step, assembly of the electrode connector, will be described. As shown in Figure 14, electrode connector 16 is assembled by inserting liquid conduit 18 from above into through-hole 1620 of electrode connector 16, with liquid conduit 18 positioned coaxially with water-side electrode 14 attached to electrode mounting hole 1210 of main body 12, and then threading inner thread 1630 of electrode connector 16 onto outer thread 1430 at the top end of water-side electrode 14.

[0088] In this case, the water side electrode part 14 is prevented from rotating around the head axis by fitting the hexagonal bolt surface 1420 into the hexagonal opening 1220 of the main body part 12, so there is no need to hold the lower end of the water side electrode part 14 with a tool as in the conventional assembly method.Instead, by fitting a tool such as a wrench into the hexagonal nut surface 1610 of the electrode connecting part 16 and turning the electrode connecting part 16, the water side electrode part 14 together with the liquid conduit part 18 can be simply and easily attached and fixed to the main body part 12.

[0089] Furthermore, since the axial (vertical) height H2 of the electrode connecting portion 16 is greater than the axial (vertical) depth H1 of the cylindrical opening 1230, the upper side of the hexagonal nut surface 1610 of the electrode connecting portion 16 is fully exposed upward from the cylindrical opening 1230, making it easy to insert a tool such as a wrench into the hexagonal nut surface 1610 and turn it.As shown in Figure 15, the electrode connecting portion 16 can be screwed onto the water side electrode portion 14 to attach and fix the water side electrode portion 14 to the electrode mounting hole 1210 of the main body portion 12, and the liquid conduit portion 16 can be attached and fixed to the upper side of the water side electrode portion 14 in a simple and easy manner.

[0090] (c4. Assembling the main body cover) Finally, the fourth step, assembly of the body cover part, will be described. As shown in Fig. 15, the assembly of the body cover part 20 is performed by passing the liquid conduit part 18 attached and fixed by the electrode connecting part 16 through the through-hole 2020, fitting the body cover part 20 from above, and then threading the outer thread part 2030 of the body cover part 20 into the inner thread part 1250 of the terminal chamber 1240 of the body part 12.

[0091] At this time, since a hexagonal nut surface 2012 is formed on the outer periphery of the lid portion 2010 of the main body cover portion 20, a tool such as a wrench can be inserted into the hexagonal nut surface 2012 and turned. Also, since there is no need to pinch the main body cover portion 20 with a tool such as needle-nose pliers to turn it, the external thread portion 2030 of the main body cover portion 20 can be simply and easily screwed into the internal thread portion 1250 of the terminal chamber 1240 to close the opening on the inlet side of the terminal chamber 1240 without damaging the main body cover portion 20 or the liquid conduit portion 18 exposed to the outside, and the assembly work of the main parts of the electrostatic spray head is completed as shown in Figure 16.

[0092] As shown in the cross section of Figure 4, the nozzle portion 22 is attached and fixed to the lower end, which is the outlet side, of the water-side electrode portion 14 of the main portion of the assembled electrically charged spray head 10, and the fixing portion 28 is screwed together with the fixing plate portion 30 into the arm fixing screw portion 1290 on the lower end, which is the outlet side, of the main body portion 12 to support the arm portion 26 at an inclination, and the arm portion 26 is used to hold the ring portion of the induction electrode portion 24 in the open space on the outlet side of the nozzle portion 22, thereby completing the assembly of the electrically charged spray head 10.

[0093] [d. Modifications of the present invention] A modified example of the method for assembling the electrostatic spray head according to the present invention will now be described. In addition to the above-described embodiment, the method for assembling the electrostatic spray head according to the present invention includes the following modifications.

[0094] (Water side electrode part) In the water-side electrode part 14 of the above embodiment, the internal flow path 1410 formed in the vertical direction inside the electrode part 14 has a stepped hole shape with a constricted shape in the middle, but the hole shape may be any shape, and for example, it may be a straight hole shape.

[0095] (Hexagonal opening, nut face and bolt face) In the above embodiment, the corresponding openings, bolt surfaces, and nut surfaces are hexagonal in order to assemble using a wrench as the specified tool, but this is not limited to this and they may also be polygonal shapes such as a square, pentagon, or heptagon, etc., that correspond to the specified tool to be used.

[0096] (others) Furthermore, the present invention is not limited to the above-described embodiment, but 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 embodiment. [Explanation of symbols]

[0097] 10: Electrostatic spray head 12: Main body 1210: Electrode mounting hole 1220:Hexagon opening 1230: Cylindrical opening 1240:Terminal room 1250: Internal thread 1260:Fixed surface part 1270: Electrode connector mounting hole 1280: Groove 1290: Arm fixing screw 14: Water side electrode part 1410: Internal flow path 1420: Hexagon bolt surface 1430, 1440: External thread 1450: Internal thread 16: Electrode connection part 1610: Hexagonal nut surface 1620:Through hole 1630: Internal thread 1640: screw hole 18:Liquid conduit section 1810: Internal flow path 1820:Danbe 1830: Tsuba section 1840: Seal 1850: External thread 20: Main body cover 2010: Lid 2012: Hexagonal nut surface 2020:Through hole 2030: External thread 2040: Seal 22: Nozzle section 2210: Nozzle hole 24: Induction electrode part 2410: Electrode core material 2420: Insulating coating 2440: Support part 2450: Cable connection part 26: Arm section 2610: Fulcrum part 2620: Pressing part 2630: Holding part 28: Fixed part 30:Fixed plate part

Claims

1. 1. A method for assembling an electrically charged spray head that sprays electrically charged liquid particles onto a spray target area, comprising: The electrostatic spray head comprises at least a main body; a water-side electrode portion that serves as one of the electrodes when a predetermined voltage is applied to charge the liquid particles to be sprayed; a liquid conduit portion through which a liquid to be sprayed flows from the outside; an electrode connector for connecting a power source for applying a predetermined voltage to the water-side electrode; Equipped with a first step of inserting the water-side electrode part from the outlet side into an electrode mounting hole in a space formed through the main body part, and holding the water-side electrode part on the main body part using a structure that prevents the water-side electrode part from coming off or rotating with respect to the electrode mounting hole in the main body part; a second step of arranging the liquid conduit portion in alignment with an end of the water-side electrode portion exposed to the inlet side through the electrode mounting hole; a third step of inserting the fitting portion of the electrode connecting portion into the fitting receiving portion at the end of the water-side electrode portion through an opening formed with the fitting portion of the electrode connecting portion from the inlet side of the liquid conduit portion, thereby attaching and fixing the water-side electrode portion to the electrode mounting hole and connecting and fixing the liquid conduit portion to the water-side electrode portion; A method for assembling an electrostatic spray head, comprising:

2. 2. The method for assembling the electrostatic spray head according to claim 1, The structure for preventing the water-side electrode from coming off or rotating relative to the electrode mounting hole of the main body is as follows: a hexagon bolt surface formed at a predetermined position between the outlet side and the inlet side of the water-side electrode portion; a hexagonal opening formed on the outlet side of the electrode mounting hole into which the hexagonal bolt surface is fitted; A method for assembling an electrostatic spray head, comprising:

3. 1. A method for assembling an electrically charged spray head that sprays electrically charged liquid particles onto a spray target area, comprising: The electrostatic spray head comprises at least a main body; a water-side electrode portion that serves as one of the electrodes when a predetermined voltage is applied to charge the liquid particles to be sprayed; a liquid conduit portion through which a liquid to be sprayed flows from the outside; an electrode connector that connects a power source for applying a predetermined voltage to the water-side electrode; Equipped with The main body has a space formed therethrough, and an electrode mounting hole having a cylindrical opening on the inlet side and a hexagonal opening on the outlet side, the water-side electrode portion has an internal flow path formed therethrough, a fitting receiving portion formed at an end of the inlet side, and a hexagonal bolt surface formed at a predetermined position between the outlet side and the inlet side to fit into the hexagonal opening of the electrode mounting hole; an internal flow path that is disposed coaxially with an axis of the internal flow path of the water-side electrode portion after assembly is formed through the liquid conduit portion; the electrode connecting portion has a through-hole formed therethrough, the through-hole having a fitting portion on the outflow side that fits into the fitting-receiving portion of the water-side electrode portion, and the outer periphery of the electrode connecting portion has a hexagonal nut surface that can be accommodated in the cylindrical opening of the electrode mounting hole, a first step of inserting the water-side electrode part into the electrode mounting hole of the main body part from the outflow side and fitting the hexagonal bolt surface of the water-side electrode part into the hexagonal opening of the electrode mounting hole to prevent the water-side electrode part from coming off or rotating relative to the electrode mounting hole and hold the water-side electrode part in the main body part; a second step of arranging the liquid conduit section at the end of the water-side electrode section exposed at the cylindrical opening of the electrode mounting hole so that the axis of the internal flow path of the water-side electrode section and the axis of the internal flow path of the liquid conduit section are coaxial; a third step of inserting the through-hole of the electrode connecting part into the liquid conduit part from the inlet side, and using a predetermined tool on the hexagonal nut surface of the electrode connecting part to fit the fitting part of the electrode connecting part into the fitting receiving part of the water-side electrode part, thereby attaching and fixing the water-side electrode part to the electrode mounting hole and connecting and fixing the liquid conduit part to the water-side electrode part; A method for assembling an electrostatic spray head, comprising:

4. 4. The method for assembling the electrostatic spray head according to claim 3, A method for assembling an electrostatic spray head, characterized in that the height of the hexagonal nut surface of the electrode connecting part, which is in the insertion direction of the water side electrode part, is set to a predetermined height that exceeds the depth of the cylindrical opening of the electrode mounting hole in the insertion direction and allows the specified tool to be used on the hexagonal nut surface exposed from the cylindrical opening.

5. 4. The method for assembling an electrostatic spray head according to claim 3, further comprising: A terminal chamber having a fitting receiving portion is formed on the inlet side of the electrode mounting hole in the space formed through the main body portion, The electrostatic spray head includes a main body cover that closes an opening on the inlet side of the terminal chamber, The main body cover portion has a through hole formed therethrough, a fitting portion that fits into the fitting receiving portion of the terminal chamber formed on the outlet side, and a lid portion having a portion on the outer periphery that is a hexagonal nut surface formed on the inlet side, A method for assembling an electrostatic spray head, characterized in that it includes a fourth step of passing the through hole of the main body cover part through the liquid conduit part from the inlet side, and using a specified tool on the hexagonal nut surface of the main body cover part to engage the fitting portion of the main body cover part with the fitting receiving portion of the terminal chamber to close the opening on the inlet side of the terminal chamber.

6. 6. The method for assembling the electrostatic spray head according to claim 3, further comprising the steps of: A method for assembling an electrostatic spray head, characterized in that a wrench is used as the predetermined tool.

7. 6. The method for assembling the electrostatic spray head according to claim 3, further comprising the steps of: A method for assembling an electrically charged spray head, characterized in that the main body and the liquid conduit are made of soft insulating materials, and the water side electrode and the electrode connecting portion are made of conductive materials.

8. 6. The method for assembling an electrostatic spray head according to claim 5, A method for assembling an electrostatic spray head, wherein the main body cover is made of a soft insulating material.

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