Assembly method for an electrostatic spraying head with a strainer

Abstract

To simply and easily carry out assembling work or replacing work even in a charged scattering head having a strainer.SOLUTION: A method for assembling a charged scattering head comprises: a first step of inserting a water-side electrode 14 into an electrode fitting hole 1210 of a body 12 from an outflow side to hold the water-side electrode 14 on the body 12; a second step of inserting a strainer 15 into an inner flow passage 1410 of the water-side electrode 14 from an inflow side; a third step of disposing a liquid conduit 18 in alignment with the water-side electrode 14; a fourth step of engaging an electrode connection 16 with the water-side electrode 14 to fit and fix the water-side electrode 14 together with the liquid conduit 18 to the electrode fitting hole 1210; a fifth step of connecting an earth cable to the electrode connection 16; and a sixth step of closing an opening of the inflow side of the body 12 by engaging a body cover 20 with a terminal chamber 1240.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a method for assembling a charged spraying head having a strainer, which charges and sprays liquid particles generated from a liquid that has passed through the strainer.

Background Art

[0002] Conventionally, in a charged spraying head that charges and sprays fine particles of a liquid such as water, charged liquid particles with an average particle diameter of 10 to 300 μm can be sprayed. It is provided in a fire extinguishing facility such as a building that is a spraying target section, and the smoke generated by a fire is adsorbed electrically to the charged liquid particles that are sprayed, thereby eliminating the smoke. Also, by electrically adsorbing dust floating in the air to the charged liquid particles at a building demolition site or the like, it is possible to remove the dust from the air.

[0003] FIG. 27 shows the structure of a conventional charged spraying head in a cross-sectional view. As shown in FIG. 27, the charged spraying head 100 includes a main body portion 120, a water-side electrode portion 140, an electrode connection portion 160, a liquid conduit portion 180, a main body cover portion 200, a nozzle portion 220, an induction electrode portion 240, and an arm portion 260.

[0004] Here, in the description of FIG. 27, the X - Y - Z directions are directions orthogonal to each other. Specifically, the Y-axis direction is the flow direction and the up - down direction of water passing through the charged spraying head 100, the X direction is the left - right direction, and the Z direction is the front - back direction. Also, the +X side in the X direction is the right side, the -X side is the left side, the +Y side in the Y direction is the upper side, the -Y side is the lower side, the +Z side in the Z direction is the front side, and the -Z side is the rear side.

[0005] Furthermore, the Y-axis direction, which is vertical, represents the direction of water flow through the head. Therefore, the upper +Y side is sometimes called the inflow side, and the lower -Y side is sometimes called the outflow side. This is also true for the XYZ directions in Figures 1 to 26, 28, and 29, which represent embodiments of the present invention. Note that the XYZ directions are relative directions that change depending on the mounting state of the 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-side electrode 140 and electrode connecting part 160 are conductors made of a conductive material such as metal.

[0007] An electrode mounting hole 121 is formed through the main body 120 in the direction of water flow (up and down) which corresponds to the head axis 350. The water-side electrode portion 140 is fitted into the electrode mounting hole 121 from the outflow side. The liquid conduit portion 180 is fitted to the main body 120 from the inflow side via a terminal chamber 124 formed on the inflow side of the main body 120. The electrode connecting portion 160 is passed through the liquid conduit portion 180 and screwed into the water-side electrode portion 140, thereby attaching and fixing the water-side electrode portion 140 to the electrode mounting hole 121 and connecting and fixing the liquid conduit portion 180 to the water-side electrode portion 140.

[0008] Multiple screw holes 164 are provided in the electrode connection section 160, allowing the terminals of an earth cable inserted via a waterproof connector to be connected through electrode connector mounting holes 127 formed in the lateral direction (perpendicular to the vertical direction, to the right in Figure 27) of the terminal chamber 124. The upper part of the liquid conduit section 180 is brought out to the outside via the main body cover section 200, and water is supplied from an external water supply pump or the like.

[0009] A nozzle section 220 is provided at the outlet end of the water-side electrode section 140, which is arranged along the head axis direction (vertical direction) of the main body section 120, and water particles with an average particle diameter of 10 to 300 μm are released from the nozzle section 220. An induction electrode section 240 is held in the open space on the outlet side of the nozzle section 220 by an arm section 260, and charges the released water particles. The induction electrode section 240 is formed by insulating a conductive electrode core material. [Prior art documents] [Patent Documents]

[0010] [Patent Document 1] Japanese Patent Publication No. 2009-106405 [Patent Document 2] Japanese Patent Publication No. 2018-183712 [Overview of the Initiative] [Problems that the invention aims to solve]

[0011] By the way, in the assembly process when manufacturing a conventional electrostatic spraying head, as shown in the exploded assembly diagram of Figure 28, the water-side electrode section 140 is fitted into the electrode mounting hole 121 of the main body section 120 from the outflow side, and then, with the liquid conduit section 180 positioned on the inflow side of the water-side electrode section 140, the electrode connecting section 160 is fitted into the inflow side of the main body section 120 by passing the through hole of the electrode connecting section 160 through the liquid conduit section 180, and the electrode connecting section 160 is screwed into the threaded part at the tip of the water-side electrode section 140 that is exposed at the upper opening of the electrode mounting hole 121, thereby attaching and fixing the water-side electrode section 140 to the electrode mounting hole 121 and connecting and fixing the liquid conduit section 180 to the water-side electrode section 140. Subsequently, the liquid conduit section 180 is passed through the through hole in the main body cover section 200 and the main body cover section 200 is screwed onto the main body section 120 to secure it in place, thereby assembling the main parts of the electrostatic spraying head shown in Figure 29 (main body section 120, water-side electrode section 140, electrode connecting section 160, liquid conduit section 180, and main body cover section 200). After that, the nozzle section 220 and the induction electrode section 240 are attached to the outflow side of the water-side electrode section 140.

[0012] However, in the assembly process of attaching and fixing the water-side electrode section 140 together with the liquid conduit section 180 using the electrode connector section 160 to the electrode mounting hole 121 of the main body section 120 of such a conventional electrostatic spraying head, 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 from the bottom of the main body section 120, must be held in place with a tool such as needle-nose pliers to prevent it from rotating, while the electrode connector section 160, which is passed through the liquid conduit section 180 positioned above the water-side electrode section 140, is screwed in. Furthermore, since the electrode connector section 160 is cylindrical, the part that protrudes slightly from the top of the electrode connector section 160 must be gripped and rotated with another tool such as needle-nose pliers, resulting in a complicated assembly process that is time-consuming and troublesome.

[0013] Furthermore, even when attaching and fixing the water-side electrode section 140 together with the liquid conduit section 180 using the electrode connecting section 160 to the electrode mounting hole 121 of the main body section 120, and then attaching and fixing the main body cover section 200 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 in shape, so it is necessary to grip and rotate it with a tool such as pliers, resulting in a complicated assembly process, and there is a risk of scratching or damaging the main body cover section 200 if the work is not carried out carefully.

[0014] Furthermore, in conventional electrostatic spraying heads, water supplied to the liquid conduit section 180 of the electrostatic spraying head 100 from an external water supply pump via piping is released as water particles from the nozzle section 220 through the internal flow path inside the water-side electrode section 140, and is charged and sprayed by the induction electrode section 240. However, if the water supplied from the outside contains solid components such as dust, these solid components may clog the fine nozzle holes formed in the nozzle section 220, affecting the amount of charged water particles sprayed. To prevent such clogging of the nozzle section 220, it is conceivable to incorporate a strainer, for example, with a mesh structure, in the middle of the internal flow path inside the electrostatic spraying head.

[0015] However, the internal flow path formed by connecting and fixing the conventional water-side electrode section 140 and liquid conduit section 180 with the electrode connecting section 160 does not have a structure for incorporating a strainer.

[0016] Furthermore, even if a strainer is incorporated, it has not been considered how or at which stage of the aforementioned complicated assembly process the strainer assembly will be added, raising concerns that it will further complicate the assembly process.

[0017] Furthermore, if a strainer is incorporated into the electrostatic spraying head, it is anticipated that solid components will accumulate in the strainer over time, clogging the mesh. In such cases, it will be necessary to disassemble the electrostatic spraying head, replace or clean the strainer, and then reassemble it. If the assembly process of the electrostatic spraying head becomes even more complicated due to the addition of the strainer, there are concerns that the disassembly process for replacing the strainer and the subsequent reassembly process will also become complicated.

[0018] The present invention aims to provide a method for assembling an electrostatic spraying head having a strainer, which allows for easy and simple assembly and replacement of the strainer, even in electrostatic spraying heads that have a strainer. [Means for solving the problem]

[0019] (Method for assembling an electrostatic spraying head with a strainer 1) The present invention relates to a method for assembling a charged spraying head having a strainer, which sprays charged liquid particles onto a target area. The electrostatic spraying head is at least The main body and When a predetermined voltage is applied to charge the liquid particles to be dispersed, the water-side electrode portion serves as one of the electrodes, A liquid conduit section into which liquid for external spraying flows, An electrode connecting part that connects a power supply for applying a predetermined voltage to the water-side electrode part, A strainer that allows the liquid flowing into the liquid conduit to pass through and removes solid components contained in the liquid, A main body cover part that closes the opening on the inflow side of the main body part, is provided, A first step of holding the water-side electrode part in the main body part by a structure that inserts the water-side electrode part from the outflow side into the electrode mounting hole of the space formed through the main body part and prevents the water-side electrode part from coming out and rotating with respect to the electrode mounting hole of the main body part; A second step of inserting a strainer from the inflow side into an internal flow path formed through the water-side electrode part; A third step of arranging the liquid conduit part in alignment with the end of the water-side electrode part exposed on the inflow side from the electrode mounting hole; A fourth step of attaching and fixing the water-side electrode part storing the strainer in the electrode mounting hole and connecting and fixing the liquid conduit part to the water-side electrode part by fitting the fitting part of the electrode connecting part to the fitting receiving part formed at the end of the water-side electrode part through an opening formed with the fitting part of the electrode connecting part from the inflow side in the liquid conduit part; A fifth step of connecting an earth cable drawn from the outside to the electrode connecting part in a terminal chamber formed on the inflow side of the electrode mounting hole of the space formed through the main body part; A sixth step of closing the opening on the inflow side of the main body part by fitting the fitting part of the main body cover part to the fitting receiving part formed in the terminal chamber through an opening formed with the fitting part of the main body cover part from the inflow side in the liquid conduit part; characterized by including.

[0020] (Structure for preventing coming out and rotation) The structure for preventing the water-side electrode part from coming out and rotating with respect to the electrode mounting hole of the main body part is a hexagonal bolt surface formed at a predetermined position between the outflow side and the inflow side of the water-side electrode part, a hexagonal opening formed on the outflow side of the electrode mounting hole for fitting the hexagonal bolt surface, and is composed of.

[0021] (Assembly method 2 of a charged spraying head having a strainer) The present invention is an assembly method of a charged spraying head that sprays charged liquid particles onto a spraying target area and has a strainer, The charged spraying head includes at least a main body part, When a predetermined voltage is applied to charge the liquid particles to be dispersed, the water-side electrode portion serves as one of the electrodes, A liquid conduit section into which liquid for external spraying flows, An electrode connecting part that connects a power supply for applying a predetermined voltage to the water-side electrode part, A strainer that allows the liquid flowing into the liquid conduit to pass through and removes solid components contained in the liquid, A main body cover that closes the opening on the inlet side of the main body, Equipped with, The main body has an electrode mounting hole formed in a space that extends through it, with a cylindrical opening on the inlet side and a hexagonal opening on the outlet side, and a terminal chamber having a fitting receiving portion is formed on the inlet side of the electrode mounting hole. The water-side electrode section has an internal flow path formed through it, a fitting receiving portion formed at the inlet end, a hexagonal bolt surface formed at a predetermined position between the outlet and inlet sides that fits into the hexagonal opening of the electrode mounting hole, and a strainer storage chamber formed within the internal flow path that allows a strainer to be detachably stored from the inlet side. The liquid conduit section is formed by an internal channel that passes through it, which is positioned coaxially with the axis of the internal channel of the water-side electrode section after assembly. The electrode connecting portion is formed by a 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 circumference is a hexagonal nut surface that can be housed in the cylindrical opening of the electrode mounting hole. The main body cover has a through-hole formed through it, a fitting portion formed on the outflow side that fits into the fitting receiving portion of the terminal chamber, and a lid portion formed on the inflow side that has a hexagonal nut surface on its outer circumference. The first step involves inserting the water-side electrode into the electrode mounting hole of the main body from the outflow side, fitting the hexagonal bolt surface of the water-side electrode into the hexagonal opening of the electrode mounting hole, thereby preventing the water-side electrode from coming out of the electrode mounting hole and rotating, and holding the water-side electrode in place in the main body. The second step involves installing the strainer into the strainer storage chamber of the water-side electrode section from the inflow side, A third step involves positioning the liquid conduit section at the end of the water-side electrode section exposed at the cylindrical opening of the electrode mounting hole, such 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. The fourth step involves passing the through-hole of the electrode connection part from the inflow side into the liquid conduit part, and using a predetermined tool against the hexagonal nut surface of the electrode connection part to fit the fitting part of the electrode connection part into the fitting receiving part of the water side electrode part, thereby attaching and fixing the water side electrode part with the strainer housed in the electrode mounting hole, and connecting and fixing the liquid conduit part to the water side electrode part. The fifth step involves connecting the ground cable, which has been brought into the terminal chamber from the outside, to the electrode connection part. The sixth step involves passing the liquid conduit through the through-hole of the main body cover from the inflow side, and using a predetermined tool against the hexagonal nut surface of the main body cover to fit the fitting part of the main body cover into the fitting receiving part of the terminal chamber, thereby closing the opening on the inflow side of the terminal chamber. It is characterized by including.

[0022] (Height of the hexagonal nut surface at the electrode connection point) The height of the hexagonal nut surface of the electrode connecting portion, which is the insertion direction for the water-side electrode portion, is set to a predetermined height that exceeds the depth of the cylindrical opening of the electrode mounting hole in the aforementioned insertion direction, and that allows a predetermined tool to be used on the hexagonal nut surface exposed from the cylindrical opening.

[0023] (spanner) Use a wrench as the designated tool.

[0024] (Assembly method for nozzle and induction electrode section) Furthermore, the electrostatic spraying head is A nozzle that releases liquid particles for spraying, When a predetermined voltage is applied to charge the liquid particles being sprayed, the other electrode becomes an induction electrode that charges the liquid particles released from the nozzle, An electrode holding structure that holds the induction electrode in the space that will be the discharge destination of the nozzle, Equipped with, Step 7 involves attaching and fixing the nozzle portion to the end of the water-side electrode portion exposed on the outflow side through the electrode mounting hole, The eighth step involves holding the induction electrode part with an electrode holding structure attached to the main body so that the induction electrode part is positioned in the space where the nozzle part will be discharged, Includes.

[0025] (Replacing the strainer) When replacing the strainer, Step 9 involves removing the main body cover from the terminal chamber, Step 10 involves removing the earth cable from the electrode connection, Step 11 involves removing the electrode connector from the water-side electrode section and removing the liquid conduit section to open the inflow side of the internal flow path of the water-side electrode section. Step 12 involves replacing the strainer housed in the internal flow path of the water-side electrode section, The 13th step involves repeating steps 2 through 6, Includes.

[0026] (Materials of the main body, liquid conduit, water-side electrode, electrode connector, and main body cover) The main body, liquid conduit, and main body cover are made of a soft insulator, while the water-side electrode and electrode connector are made of a conductor. [Effects of the Invention]

[0027] (Effects of assembly method 1 for an electrostatic spraying head with a strainer) The first method for assembling the electrostatic spraying head includes: a first step of inserting the water-side electrode from the outflow side into the electrode mounting hole in the space formed through the main body and holding the water-side electrode in the main body with a structure that prevents the water-side electrode from coming out and rotating in relation to the electrode mounting hole in the main body; a second step of inserting a strainer from the inflow side into the internal flow path formed through the water-side electrode; a third step of positioning the liquid conduit in line with the end of the water-side electrode exposed on the inflow side from the electrode mounting hole; a fourth step of attaching and fixing the water-side electrode with the strainer housed in it to the electrode mounting hole and connecting and fixing the liquid conduit to the water-side electrode by fitting the fitting part of the electrode connecting part into the fitting receiving part formed at the end of the water-side electrode through an opening in the liquid conduit from the inflow side where the fitting part of the electrode connecting part is formed; and a terminal chamber formed on the inflow side of the electrode mounting hole in the space formed through the main body from the outside The design includes a fifth step of connecting the pulled-in earth cable to the electrode connection section, and a sixth step of closing the opening on the inlet side of the main body by fitting the fitting section of the main body cover into the fitting receiver formed in the terminal chamber, through the opening formed in the inlet side of the liquid conduit section. As a result, the water-side electrode section inserted into the electrode mounting hole of the main body section is constructed to prevent it from coming out or rotating relative to the electrode mounting hole of the main body section. For example, it is composed of a hexagonal opening in the electrode mounting hole and a hexagonal bolt surface in the water-side electrode section. The hexagonal bolt surface fits into the hexagonal opening, preventing the water-side electrode section from coming out or rotating relative to the electrode mounting hole of the main body section. This eliminates the need to hold the inlet side of the water-side electrode section with a tool to prevent it from coming out or rotating, as in conventional assembly work, making assembly easier and simpler than in conventional assembly work.

[0028] Furthermore, since the strainer is installed by inserting it into the internal flow path of the water-side electrode section from the inlet side, all steps from the second to the sixth step after insertion of the water-side electrode section are performed on the inlet side of the water-side electrode section. Moreover, steps from the second to the sixth step can be performed regardless of the structure or assembly work attached to the inlet side of the water-side electrode section, and even with the added strainer, the conventional assembly work is not complicated.

[0029] (Effects of assembly method 2 for an electrostatic spraying head with a strainer) In the second method for assembling the electrostatic spraying head, the main body cover has a through-hole formed through it, a fitting portion formed on the outlet side that fits into the fitting receiving portion of the terminal chamber, and a lid portion formed on the inlet side that has a portion with a hexagonal nut surface on its outer circumference. The first step is to insert the water-side electrode portion into the electrode mounting hole of the main body from the outlet side, and fit the hexagonal bolt surface of the water-side electrode portion into the hexagonal opening of the electrode mounting hole to prevent the water-side electrode portion from coming out of the electrode mounting hole and rotating, thereby holding the water-side electrode portion in the main body. The second step is to house the strainer in the strainer storage chamber of the water-side electrode portion from the inlet side. The third step is to position the liquid conduit portion at the end of the water-side electrode portion exposed at the cylindrical opening of the electrode mounting hole such that the axis of the internal flow path of the water-side electrode portion and the axis of the internal flow path of the liquid conduit portion are coaxial. The third step is to pass the through-hole of the electrode connection portion through the liquid conduit portion from the inlet side, and face the hexagonal nut surface of the electrode connection portion. The assembly method includes the following steps: a fourth step of using a predetermined tool to fit the fitting part of the electrode connection part into the fitting receiving part of the water-side electrode part, thereby mounting and fixing the water-side electrode part with the strainer housed in it into the electrode mounting hole, and connecting and fixing the liquid conduit part to the water-side electrode part; a fifth step of connecting the earth cable, which has been drawn into the terminal chamber from the outside, to the electrode connection part; and a sixth step of passing the through hole of the main body cover part from the inflow side to the liquid conduit part, and using a predetermined tool against 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 inflow side of the terminal chamber. As a result, similar to the assembly method 1 of the electrostatic spraying head, it is possible to assemble the device more easily and simply than with conventional assembly work, and even with the added structure of a strainer, it does not complicate the conventional assembly work. Furthermore, by making the outer circumference of the electrode connection part and main body cover part a hexagonal nut surface instead of the conventional cylindrical shape which makes mounting work difficult, a predetermined tool, such as a wrench, can be used against the hexagonal nut surface, making assembly easier and simpler than with conventional assembly work.

[0030] (Effect of the height of the hexagonal nut surface at the electrode connection point) Furthermore, the height of the hexagonal nut surface of the electrode connecting portion, which is the insertion direction for the water-side electrode portion, is set to a predetermined height that exceeds the depth of the cylindrical opening of the electrode mounting hole in the insertion direction, allowing a predetermined tool to be used on the hexagonal nut surface exposed from the cylindrical opening. As a result, when using a predetermined tool on the hexagonal nut surface to fit the fitting portion of the electrode connecting portion to the fitting receiver portion of the water-side electrode portion, the upper side of the hexagonal nut surface is always sufficiently exposed from the cylindrical opening of the electrode mounting hole for tool use. This makes assembly work more reliable compared to conventional structures where the water-side electrode portion protrudes only slightly.

[0031] (The effect of the wrench) Furthermore, since a wrench is designated as the specified tool, assembly can be performed in a simple and easy manner by preparing a wrench that matches the size of the hexagonal nut surface on the electrode connection part or the hexagonal nut surface on the main body cover and turning it.

[0032] (Effects of the assembly method for the nozzle and induction electrode sections) Furthermore, the design includes a seventh step of attaching and fixing the nozzle to the end of the water-side electrode exposed on the outlet side through the electrode mounting hole, and an eighth step of holding the induction electrode with an electrode holding structure attached to the main body so that the induction electrode is positioned in the space where the nozzle will discharge. As a result, the seventh and eighth steps, which assemble the outlet side of the water-side electrode, are independent of the second to sixth steps, which assemble the inlet side of the water-side electrode. Therefore, when replacing the strainer, it is not necessary to perform the reverse steps of the seventh and eighth steps, making it possible to replace the strainer easily and simply.

[0033] (Effect of replacing the strainer) Furthermore, when replacing the strainer, the process includes a ninth step of removing the main body cover from the terminal chamber, a tenth step of removing the earth cable from the electrode connection, an eleventh step of removing the electrode connection and liquid conduit from the water-side electrode to open the inflow side of the internal flow path of the water-side electrode, a twelfth step of replacing the strainer housed in the internal flow path of the water-side electrode, and a thirteenth step of repeating steps 2 through 6. This allows replacement to be done by disassembling only the inflow side of the water-side electrode, making the strainer replacement process simple and easy. In addition, the assembly process after replacing the strainer is the same as steps 2 through 6, making it simple and easy to perform.

[0034] (Effects of the materials used in the main body, liquid conduit, water-side electrode, electrode connector, and main body cover) Since the main body, liquid conduit, and main body cover are made of soft insulators, and the water-side electrode and electrode connector are made of conductors, even if the water-side electrode and electrode connector are made of hard conductors such as metal, the reaction force from slight deformation of the soft insulators, the liquid conduit and main body cover, allows for more secure mounting and fixing without the need for washers or the like. Furthermore, even between soft insulators such as the main body and main body cover, the increased frictional resistance due to slight deformation allows for more secure mounting and fixing. [Brief explanation of the drawing]

[0035] [Figure 1] This is an explanatory diagram showing the front view of the electrostatic dispersal head. [Figure 2] This is an explanatory diagram showing the top and bottom surfaces of the charging head. [Figure 3] This is a perspective view of the electrostatic spraying head as seen from the spraying side. [Figure 4] This is an explanatory diagram showing the internal structure of the electrostatic dispersal head in cross-section. [Figure 5] This is an explanatory diagram showing the charging head in its assembled and disassembled state. [Figure 6] This is an explanatory diagram showing the main unit after it has been removed. [Figure 7]This is a perspective view showing the main unit after it has been removed from the packaging. [Figure 8] This is an explanatory diagram showing the water-side electrode section. [Figure 9] This is an explanatory diagram showing the strainer after it has been removed. [Figure 10] This is an explanatory diagram showing the liquid conduit section. [Figure 11] This is an explanatory diagram showing the electrode connection section. [Figure 12] This is an explanatory diagram showing the main body cover removed from the packaging. [Figure 13] This is an explanatory diagram showing the nozzle holding part removed from the diagram. [Figure 14] This is an explanatory diagram showing the fixed part removed. [Figure 15] This is an explanatory diagram showing the fixed plate section. [Figure 16] This is an explanatory diagram showing the arm section removed from the diagram. [Figure 17] This is an explanatory diagram showing the induction electrode section. [Figure 18] This is an explanatory diagram showing the assembly of the water-side electrode section to the main body. [Figure 19] Figure 18 is an explanatory diagram showing the assembly of the strainer after assembly. [Figure 20] Figure 19 is an explanatory diagram showing the assembly of the liquid conduit section after assembly. [Figure 21] Figure 20 is an explanatory diagram showing the assembly of the electrode connection section after assembly. [Figure 22] Figure 21 is an explanatory diagram showing the connection of the earth cable after assembly. [Figure 23] Figure 22 is an explanatory diagram showing the assembly of the main body cover after connection. [Figure 24] This is an explanatory diagram showing the assembly of the nozzle holder section, which houses the assembled nozzle section as shown in Figure 23. [Figure 25] Figure 24 is an explanatory diagram showing the assembly of the induction electrode section using the assembled electrode holding structure. [Figure 26] This is an explanatory diagram showing the assembly and disassembly process for replacing the strainer. [Figure 27] This is a cross-sectional view showing the internal structure of a conventional electrostatic dispersal head. [Figure 28] This is an explanatory diagram showing the main parts of a conventional electrostatic spraying head in an assembled and disassembled state. [Figure 29] This is a cross-sectional view showing the main part of a conventional electrostatic spraying head corresponding to Figure 28. [Modes for carrying out the invention]

[0036] The following describes in detail, with reference to the drawings, an embodiment of the assembly method for a charged spraying head having a strainer according to the present invention. However, the present invention is not limited to the following embodiments.

[0037] [Basic Concepts of the Embodiment] First, the basic concept of the embodiment will be explained. The embodiment generally describes a method for assembling a charged spraying head having a strainer, which sprays charged liquid particles onto a target area.

[0038] Here, "charged spraying head" refers to a device that sprays charged liquid particles onto a target area. The configuration of the assembled charged spraying head according to the present invention includes at least a main body, a water-side electrode section which serves as one of the electrodes when a predetermined voltage is applied to charge the liquid particles to be sprayed, a liquid conduit section into which liquid for spraying flows in from the outside, an electrode connecting section which connects a power source for applying a predetermined voltage to the water-side electrode section, a strainer which allows the liquid that has flowed into the liquid conduit section to pass through and removes solid components contained in the liquid, and a main body cover section which closes the opening on the inlet side of the main body.

[0039] Furthermore, "charged liquid particles" refer to liquid particles that have been charged and sprayed from a charged spraying head. For example, a predetermined high voltage is applied from a high-voltage power supply as the power source between the water-side electrode and the induction electrode, which is the other electrode of the charged spraying head, and the potential of the induction electrode relative to the water-side electrode is adjusted, causing the liquid particles to be charged by induction charging by passing them through the high electric field generated at the induction electrode. The sprayed liquid is any liquid that has a smoke-removing effect, a fire-extinguishing effect, a dust-removing effect, etc. For example, this includes water that is supplied pressurized by an external water supply pump or the like through a pipe connection to the liquid conduit. Furthermore, "strainer" refers to a structure that has been used to remove solid components from a liquid. For example, this includes structures such as a mesh structure with a size smaller than the solid components to be removed, or perforated metal with holes arranged at predetermined intervals.

[0040] Here, the assembly method 1 for the electrostatic dispersal head is: The first step involves inserting the water-side electrode into the electrode mounting hole formed in a space that penetrates the main body from the outflow side, and holding the water-side electrode in the main body with a structure that prevents the water-side electrode from coming out or rotating relative to the electrode mounting hole in the main body, The second step involves inserting a strainer from the inflow side into an internal flow channel formed through the water-side electrode section, The third step involves positioning the liquid conduit section in line with the end of the water-side electrode section exposed on the inflow side from the electrode mounting hole, The fourth step involves attaching and fixing the water-side electrode section, which houses the strainer, to the electrode mounting hole and simultaneously connecting and fixing the liquid conduit section to the water-side electrode section by fitting the fitting portion of the electrode connecting section to the fitting receiver formed at the end of the water-side electrode section through an opening formed in the liquid conduit section from the inflow side, and A fifth step involves connecting an earth cable, which has been drawn in from the outside, to the electrode connection part in a terminal chamber formed on the inflow side of the electrode mounting hole in the space formed through the main body, The sixth step involves closing the opening on the inflow side of the main body by fitting the fitting portion of the main body cover into the fitting receiving portion formed in the terminal chamber, through the opening where the fitting portion of the main body cover is formed from the inflow side of the liquid conduit, It includes.

[0041] Here, "inflow side" refers to the side of the assembled electrostatic spraying head from which liquid flows in from the outside, and "outflow side" refers to the side of the assembled electrostatic spraying head from which charged liquid particles flow out.

[0042] Furthermore, the "structure for preventing the water-side electrode from coming loose and rotating relative to the electrode mounting hole of the main body" can be any structure that eliminates the need to hold the inlet side of the water-side electrode with a tool during conventional assembly work. For example, it can consist of a hexagonal bolt face formed at a predetermined position between the outlet side and the inlet side of the water-side electrode, and a hexagonal opening formed on the outlet side of the electrode mounting hole into which the hexagonal bolt face fits.

[0043] Furthermore, the "fitting receiver" of the water-side electrode and the "fitting part" of the electrode connection part can have any structure as long as the fitting part and the fitting receiver can be fitted together. For example, this includes cases where the fitting part has a male thread structure and the fitting receiver has a female thread structure. When the fitting part and the fitting receiver are threaded parts, those with threads on the outer circumference are called "external threaded parts," and those with threads on the inner circumference are called "internal threaded parts." The same applies to other "fitting parts" and "fitting receivers."

[0044] Furthermore, in the electrostatic spraying head of the electrostatic spraying head assembly method 2, the "main body" has an electrode mounting hole formed in a space that runs through it, with a cylindrical opening on the inlet side and a hexagonal opening on the outlet side, and a terminal chamber with a fitting receiving portion formed on the inlet side of the electrode mounting hole. Furthermore, the "water side electrode part" has an internal flow path formed through it, a fitting receiving portion formed at the end on the inlet side, a hexagonal bolt surface formed at a predetermined position between the outlet side and the inlet side that fits into the hexagonal opening of the electrode mounting hole, and a strainer storage chamber formed in the internal flow path that allows a strainer to be detachably stored from the inlet side. Furthermore, the "liquid conduit part" is formed by an internal flow path that runs through it and is arranged coaxially with the axis of the internal flow path of the water side electrode part after assembly. Furthermore, the "electrode connecting part" is formed by a through hole that runs through it, with a fitting receiving portion on the outlet side that fits into the mating part of the water side electrode part, and the outer circumference is a hexagonal nut surface that can be stored in the cylindrical opening of the electrode mounting hole. Furthermore, the "main body cover" has a through-hole formed through it, a fitting portion formed on the outflow side that fits into the fitting receiving portion of the terminal chamber, and a lid portion formed on the inflow side that has a hexagonal nut surface on its outer circumference.

[0045] Furthermore, a "cylindrical opening" is an opening with a cylindrical inner surface, formed by expanding its diameter, for example, around the electrode mounting hole. Similarly, a "hexagonal opening" is an opening with a hexagonal inner surface, formed by expanding its diameter, for example, around the electrode mounting hole.

[0046] Furthermore, the assembly method 2 for the electrostatic dispersal head is as follows: The first step involves inserting the water-side electrode into the electrode mounting hole of the main body from the outflow side, fitting the hexagonal bolt surface of the water-side electrode into the hexagonal opening of the electrode mounting hole, thereby preventing the water-side electrode from coming out of the electrode mounting hole and rotating, and holding the water-side electrode in place in the main body. The second step involves installing the strainer into the strainer storage chamber of the water-side electrode section from the inflow side, A third step involves positioning the liquid conduit section at the end of the water-side electrode section exposed at the cylindrical opening of the electrode mounting hole, such 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. The fourth step involves passing the through-hole of the electrode connection part from the inflow side into the liquid conduit part, and using a predetermined tool against the hexagonal nut surface of the electrode connection part to fit the fitting part of the electrode connection part into the fitting receiving part of the water side electrode part, thereby attaching and fixing the water side electrode part with the strainer housed in the electrode mounting hole, and connecting and fixing the liquid conduit part to the water side electrode part. The fifth step involves connecting the ground cable, which has been brought into the terminal chamber from the outside, to the electrode connection part. The sixth step involves passing the liquid conduit through the through-hole of the main body cover from the inflow side, and using a predetermined tool against the hexagonal nut surface of the main body cover to fit the fitting part of the main body cover into the fitting receiving part of the terminal chamber, thereby closing the opening on the inflow side of the terminal chamber. It is characterized by including.

[0047] Furthermore, the height of the hexagonal nut surface of the electrode connecting portion, which is the insertion direction for the water-side electrode portion, is set to a predetermined height that exceeds the depth of the cylindrical opening of the electrode mounting hole in the aforementioned insertion direction, and allows a predetermined tool to be used on the hexagonal nut surface exposed from the cylindrical opening.

[0048] Furthermore, the charged spraying head comprises a nozzle section that releases liquid particles for spraying, an induction electrode section that acts as the other electrode when a predetermined voltage is applied to charge the liquid particles to be sprayed, and charges the liquid particles released from the nozzle section, and an electrode holding structure that holds the induction electrode section in the space to which the nozzle section is released, and the assembly method of the charged spraying head includes the assembly method of the nozzle section and the induction electrode section.

[0049] Furthermore, the assembly method for the nozzle and induction electrode sections is as follows: Step 7 involves attaching and fixing the nozzle portion to the end of the water-side electrode portion exposed on the outflow side through the electrode mounting hole, The eighth step involves holding the induction electrode part with an electrode holding structure attached to the main body so that the induction electrode part is positioned in the space where the nozzle part will be discharged, It is characterized by including.

[0050] Furthermore, when replacing the strainer of the electrostatic spray head, that is, regarding the method of replacing the strainer, Step 9 involves removing the main body cover from the terminal chamber, Step 10 involves removing the earth cable from the electrode connection, Step 11 involves removing the electrode connector from the water-side electrode section and removing the liquid conduit section to open the inflow side of the internal flow path of the water-side electrode section. Step 12 involves replacing the strainer housed in the internal flow path of the water-side electrode section, The 13th step involves repeating steps 2 through 6, It is characterized by including.

[0051] Furthermore, the "main body," "liquid conduit," and "main body cover" are insulators made of insulating material, and the "water-side electrode" and "electrode connector" are conductors made of conductive material. The insulators, the "main body," "liquid conduit," and "main body cover," may also be made of soft insulating material.

[0052] Furthermore, steps 2 through 6 in the method for assembling the electrostatic spraying head of the present invention, and steps 9 through 13 in the method for replacing the strainer, are treated as assembly work on the inflow side, while steps 7 through 8 in the method for assembling the electrostatic spraying head are treated as assembly work on the outflow side.

[0053] Embodiments will be described below. In the embodiments shown below, the "charged spraying head" comprises a "main body, a water-side electrode, a liquid conduit, an electrode connecting part, a main body cover, a nozzle, an induction electrode, and an electrode holding structure," the "structure for preventing the water-side electrode from coming loose and rotating in relation to the electrode mounting hole of the main body" is a "structure composed of the hexagonal bolt surface of the water-side electrode and the hexagonal opening of the electrode mounting hole," the "fitting part and mating receiving part" is a "screw part," the "electrode holding structure" is composed of an "arm part, a fixing part, and a fixing plate part," the "nozzle part" is "attached and fixed to the water-side electrode while housed in the nozzle holding part," the "charged liquid particles to be sprayed" are "charged water particles," and the "strainer" is a "strainer that is a cone having a mesh structure."

[0054] [Specific details of the embodiment] The specific details of the embodiment will be explained as follows: a. Structure of the electrostatic dispersal head b. Components of the electrostatic dispersal head b1. Main body b2.Water side electrode part b3. Strainer b4.Liquid conduit section b5. Electrode connection part b6. Main body cover b7. Nozzle holding part b8. Fixed part b9. Fixing plate section b10. Arm section b11.Induction electrode part c. Method for assembling an electrostatic spraying head with a strainer c1. Assembly of the water-side electrode section to the main body c2. Strainer Assembly c3. Assembly of the liquid conduit section c4. Assembly of electrode connection section c5. Connecting the ground cable c6. Assembly of the main body cover c7. Assembly of the nozzle holder containing the nozzle section. c8. Assembly of the induction electrode section using the electrode holding structure d. How to replace the strainer e. Modifications of the present invention

[0055] [a. Structure of the electrostatic dispersal head] The structure of the electrostatic spraying head will be explained. This explanation will refer to Figure 1, which shows the front view of the electrostatic spraying head; Figure 2, which shows the top and bottom views of the electrostatic spraying head; Figure 3, a perspective view of the electrostatic spraying head from the spraying side; and Figure 4, which shows a cross-section of the internal structure of the electrostatic spraying head. Note that Figure 2(A) shows the top view, Figure 2(B) shows the bottom view, and Figure 4 shows the cross-section along the cutting line aa in Figure 2(A). Also, Figures 1 and 4 are shown with the earth cable connected.

[0056] As shown in Figures 1 to 4, the electrostatic spraying head 10 of this embodiment consists of a main body 12, a water-side electrode 14, an electrode connecting part 16, a liquid conduit 18, a main body cover 20, a nozzle 22, an induction electrode 24, and an arm 26.

[0057] The main body 12, liquid conduit 18, main body cover 20, nozzle 22, and arm 26 are insulators manufactured from insulating materials. Examples of insulating materials include polyvinyl chloride resin, polyphenylene sulfide resin, urethane resin, polytetrafluoroethylene resin, polychlorotrifluoroethylene resin, ceramics (alumina ceramics), and glass enamel.

[0058] The water-side electrode portion 14 and the electrode connecting portion 16 are conductors made of a conductive material. As the conductive material, metal is used, but conductive resins, fiber bundles, rubber, etc. other than metal may also be used, or composites of these may be used.

[0059] As shown in the cross-section of Figure 4, an electrode mounting hole 1210 is formed inside the main body 12 in the direction of the head axis 35 (up and down direction), which is the direction of water flow. The water-side electrode section 14 is inserted into the electrode mounting hole 1210 from the outlet side (bottom side). A liquid conduit section 18 is positioned in a terminal chamber 1240 formed on the inlet side (top side) of the electrode mounting hole 1210. An electrode connecting section 16, inserted through the liquid conduit section 18, is screwed onto the upper end of the water-side electrode section 14 that is exposed from the electrode mounting hole 1210 into the terminal chamber 1240. This secures the water-side electrode section 14 to the electrode mounting hole 1210 and connects and secures the outlet side of the liquid conduit section 18 to the inlet side of the water-side electrode section 14. A strainer 15 is housed inside the water-side electrode section 14.

[0060] Multiple screw holes 1640 are formed in the electrode connecting portion 16, and the terminal 38 of the earth cable 34, which is inserted via a waterproof cable connector 36 that is attached to an electrode connector mounting hole 1270 formed laterally (perpendicular to the vertical direction, 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 by a screw 40.

[0061] The liquid conduit section 18 is exposed to the outside through a main body cover section 20 provided at the inlet opening of the terminal chamber 1240, and pressurized water is supplied to it by an external water supply pump or the like. The pressure of the water supplied to the liquid conduit section 18 is adjusted, for example, within the range of 0.1 to 1.0 MPa.

[0062] A nozzle section 22 is attached to the outlet side (lower end side) of the water-side electrode section 14, which is mounted along the head axis 35 direction of the main body section 12, by a nozzle holding section 32. As shown in Figure 3, the nozzle section 22 has nozzle holes 2210 formed therein and releases water particles with a predetermined average particle diameter, for example, an average particle diameter of 10 to 300 μm.

[0063] In the open space on the outflow side of the nozzle section 22, an induction electrode section 24 is arranged using three arm sections 26, for example, as shown in Figure 3. The induction electrode section 24 is, for example, ring-shaped, and as shown in the cross-section in Figure 4, it is formed by covering a conductive electrode core material 2410 with an insulating coating 2420. A support section 2440 is formed to extend upward after being taken out laterally (in a direction perpendicular to the vertical direction, to the left in Figure 1) from a predetermined position in the ring section. A cable connection section 2450, which is pulled out from the tip of the support section 2440 and connected to the electrode core material 2410 inside the ring, is exposed, and a voltage application cable is connected to the cable connection section 2450.

[0064] The electrode core material 2410 of the induction electrode section 24 is a conductor made of a conductive material. As the conductive material, metal is used, but conductive resins, fiber bundles, rubber, etc. other than metal may also be used, or a composite material combining these materials may be used.

[0065] Furthermore, as the insulating material for the insulating coating 2420 in the induction electrode section 24, at least one of the following is used as the insulating material: polyvinyl chloride resin, polyphenylene sulfide resin, urethane resin, polytetrafluoroethylene resin, polychlorotrifluoroethylene resin, ceramics (alumina ceramics), or glass enamel.

[0066] As shown in the cross-section of Figure 4, the ring portion of the induction electrode portion 24 is held in a predetermined position in the open space on the outflow side of the nozzle portion 22 by the arm portion 26, the fixing portion 28, and the fixing plate portion 30. The pivot portion 2610 on the outer upper end of the arm portion 26 abuts against the outer corner of the groove portion 1280 of the main body portion 12, while the pressing portion 2620 on the inner upper end of the arm portion 26 is floating above the groove portion 1280.

[0067] When the fixing part 28 is rotated and screwed into the groove part 1280 side (upper side), the fixing plate part 30 is pressed upward, and the pressing part 2620 of the arm part 26 is pressed toward the groove part 1280. As a result, the arm part 26 rotates around the pivot part 2610, and the holding part 2630 tilts inward. Then, due to the tilting of the three arm parts 26, the ring part of the induction electrode part 24 is pressed at three points on the holding part 2630 of the arm part 26, and the induction electrode part 24 is held in a state in which the ring central axis is centered on the head axis 35.

[0068] 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, such as a DC voltage, AC voltage, pulse voltage, etc., is applied 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, for example, in the range of +0.5kV to +20kV or -0.5kV to -20kV. A predetermined external electric field is formed around the ring part of the induction electrode part 24, charging the water particles emitted from the nozzle part 22 and passing through the ring part of the induction electrode part 24, and then dispersing them.

[0069] For example, when a DC voltage is applied between the water-side electrode 14 and the induction electrode 24, if the polarity of the induction electrode 24 is positive when the water-side electrode 14 is set to a reference potential (earth potential, 0V), negatively charged water particles will be generated. If the polarity of the induction electrode 24 is negative when the water-side electrode 14 is set to a reference potential (earth potential, 0V), positively charged water particles will be generated. Furthermore, if the voltage applied between the water-side electrode 14 and the induction electrode 24 is in the range of +0.5kV to +20kV or -0.5kV to -20kV, the generation of spark discharge is prevented, and charged water particles are generated while ensuring safety.

[0070] When using the electrostatic spraying head 10 to remove dust from the air, for example at a building demolition site, the electrostatic water particles sprayed from the electrostatic spraying head 10 electrically attract and capture airborne dust particles, causing them to fall and be removed from the air. Furthermore, when the electrostatic spraying head 10 is installed in a fire extinguishing system, the electrostatic water particles sprayed from the electrostatic spraying head 10 electrically attract and capture airborne smoke particles, causing them to fall and providing a smoke extinguishing effect. In addition, the electrostatic water particles electrically attract to the object being extinguished, thereby improving the fire extinguishing performance.

[0071] [b. Components of the electrostatic dispersal head] The embodiment provides a method for assembling an electrostatic spraying head having a strainer. Here, the electrostatic spraying head 10 to which the assembly method of the embodiment applies is, as shown in the exploded view of the electrostatic spraying head 10 in Figure 5, a main body 12, a water-side electrode 14, a strainer 15, an electrode connecting part 16, a liquid conduit 18, a main body cover 20, a nozzle 22, a nozzle holding part 32, an arm 26, a fixing plate 30, a fixing part 28, and an induction electrode 24. Next, each component to which the assembly method of the embodiment applies will be described.

[0072] (b1. Main body) First, the main body of the electrostatic spraying head will be described. For this description, please refer to Figures 6 and 7, which show the main body removed from the unit. Figure 6(A) shows the top view of the main body, Figure 6(B) shows the front view of the main body, Figure 6(C) shows the bottom view of the main body, and Figure 6(D) shows the cross-section of the cutting line bb in Figure 6(A). Figure 7(A) shows a perspective view of the main body from above, and Figure 7(B) shows a perspective view of the main body from below.

[0073] As shown in Figures 6 and 7, the main body 12 is manufactured by injection molding using, for example, polyvinyl chloride resin as an insulating material. A terminal chamber 1240 is formed on the inlet side (upper side) of the main body 12, and an electrode mounting hole 1210 is formed below the terminal chamber 1240, penetrating in the head axis direction (vertical direction) for mounting and fixing the water side electrode 14. The shape of the electrode mounting hole 1210 is arbitrary, but at least a cylindrical opening 1230 is formed on the upper end side which is the inlet side, and a hexagonal opening 1220 is formed on the lower end side which is the outlet side. A seal 1222 is placed on the lower end surface of the hexagonal opening 1220, and an arm fixing screw portion 1290 is formed on the outer circumference of the lower end surface of the hexagonal opening 1220, which is used to hold the arm portion 26 in the groove portion 1280.

[0074] The hexagonal opening 1220 is an opening with a predetermined depth and a hexagonal inner surface. The cylindrical opening 1230 is an opening with a predetermined depth (H1) and a cylindrical inner surface. The terminal chamber 1240 is an opening with a predetermined depth and a cylindrical inner surface that is larger in diameter than the cylindrical opening 1230, and an internal threaded portion 1250 is formed on the inside of the opening.

[0075] Furthermore, the main body 12 has an electrode connector mounting hole 1270 for connecting an earth cable, formed in the lateral direction of the terminal chamber 1240 (in a direction perpendicular to the vertical direction, to the right in Figure 6), and a groove 1280 for holding the arm portion 26 used to hold the induction electrode portion 24 is formed at the lower end of the main body 12, which is the outflow side. In addition, fixing surface portions 1260 are formed in three places on the outer circumferential surface of the main body 12, front, back and left side, and four screw holes 1262 are provided in the fixing surface portions 1260.

[0076] (b2. Water side electrode part) Next, we will explain the water-side electrode section of the electrostatic spraying head. For this explanation, please refer to Figure 8, which shows the water-side electrode section separately. 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 along the cutting line cc in Figure 8(B).

[0077] As shown in Figure 8, the water-side electrode portion 14 is manufactured from a conductive material, such as a conductive metal, and has an internal flow path 1410 that penetrates it in the head axis direction (vertical direction). An external thread portion 1430 is formed on the outer circumference of the upper end side which is the inflow side, and a hexagonal bolt surface 1420 is formed at a predetermined position in the middle of the outer circumference. The hexagonal bolt surface 1420 fits into the hexagonal opening 1220 formed in the electrode mounting hole 1210 of the main body portion 12 shown in Figures 6 and 7 when the water-side electrode portion 14 is inserted from the outflow side (bottom side), thereby realizing a structure that prevents the water-side electrode portion 14 from coming out of the electrode mounting hole 1210 and from rotating.

[0078] Furthermore, the external thread portion 1430 of the water-side electrode portion 14 is exposed at the cylindrical opening 1230 of the main body portion 12 when the water-side electrode portion 14 is inserted from the outflow side (bottom side) into the electrode mounting hole 1210 of the main body portion 12 shown in Figures 6 and 7, and is designed to receive the screw-in of the electrode connecting portion 16, which will be described later. In addition, an external thread portion 1440 and an internal thread portion 1450 are formed on the lower end side of the water-side electrode portion 14, which are used to attach and fix the nozzle portion 22.

[0079] Furthermore, in the internal flow path 1410 of the water-side electrode section 14, a strainer storage chamber 1412 is formed, opening first to the inlet side, followed by a tapered constriction section 1414 to prevent the strainer from coming out, and then an internal threaded section 1450 is formed in a hole that is enlarged relative to the constriction section 1414, with an external threaded section 1440 formed on its outer circumference.

[0080] (b3. Strainer) Next, we will explain the strainer of the electrostatic spraying head. For this explanation, please refer to Figure 9, which shows the strainer removed from the unit. Figure 9(A) shows the bottom (underside), and Figure 9(B) shows the front (front).

[0081] As shown in Figure 9, the strainer 15 has, for example, a ring portion 1510 on the outlet side and a mesh portion 1520 that is conical relative to the ring portion 1510. The mesh size and shape of the mesh portion 1520 are arbitrary as long as they can remove solid components and prevent clogging of the nozzle hole 2210 of the nozzle portion 22. For example, the mesh size is smaller than the diameter of the nozzle hole 2210 of the nozzle portion 22 shown in Figure 3. As a result, solid components larger than the diameter of the nozzle hole 2210 contained in the water supplied from the outside are removed by the strainer 15, and clogging of the nozzle hole 2210 can be prevented.

[0082] Furthermore, the material of the mesh portion 1520 is arbitrary; for example, it may be a metal mesh such as stainless steel, or a resin mesh such as polyvinyl chloride resin. Also, the shape of the strainer 15 is arbitrary; for example, it may be cylindrical or bag-shaped.

[0083] (b4.Liquid conduit section) Next, we will describe the liquid conduit section of the electrostatic spraying head. For this description, please refer to Figure 10, which shows the liquid conduit section separated from the head. Figure 10(A) shows the front view, Figure 10(B) shows the bottom view, and Figure 10(C) shows the cross-section along the cutting line dd in Figure 10(A).

[0084] As shown in Figure 10, the liquid conduit section 18 is manufactured by injection molding using, for example, polyvinyl chloride resin as an insulating material. An internal flow path 1810 is formed through the inside of the conduit section in the direction of the head axis (vertical direction). Starting from the upper end which is the inflow side and moving towards the lower end which is the outflow side, an external threaded section 1850 is first formed at the upper end, followed by a stepped section 1820 which widens the diameter, and then a seal 1840 is placed in a seal groove formed on the outer circumference. At the lower end, a flange section 1830 and a seal groove are formed below the flange section 1830, and the seal 1840 is placed in the seal groove.

[0085] The flange portion 1830 and the seal 1840 located below it are used to seal the lower end of the liquid conduit portion 18 to the inflow opening (upper end opening) of the internal flow path 1430 of the water-side electrode portion 14 shown in Figure 8. The stepped portion 1820 and the seal 1840 located below it are used for positioning and sealing when the main body cover portion 20, described later, is passed through the liquid conduit portion 18 and attached and fixed to the terminal chamber 1240 of the main body portion 12 to close the inflow side opening of the terminal chamber 1240.

[0086] (b5. Electrode connection part) Next, the electrode connection part of the electrostatic dispersion head will be described. For this description, please refer to Figure 11, which shows the electrode connection part separately. Figure 11(A) shows the top view, Figure 11(B) shows the front view, and Figure 11(C) shows the cross-section of the cutting line ee in Figure 11(A).

[0087] As shown in Figure 11, the electrode connecting portion 16 is made of a conductive material, such as a conductive metal, and its outer circumference is formed as a hexagonal nut surface 1610, with a through hole 1620 through which an internal thread portion 1630 is cut. The electrode connecting portion 16 has a hexagonal nut surface 1610 formed so that it fits into the cylindrical opening 1230 formed in the electrode mounting hole 1210 of the main body portion 12 in Figures 6 and 7. The predetermined height (H2) in the head axis direction (vertical direction) is set to a predetermined height that exceeds the depth (H1) of the cylindrical opening 1230 in the head axis direction (vertical direction), for example, H2 = 1.5 * H1.

[0088] The electrode connecting portion 16 is configured to attach and fix the water-side electrode portion 14 together with the liquid conduit portion 18 to the electrode mounting hole 1210 by screwing the internal thread portion 1630 onto the external thread portion 1430 of the upper end of the water-side electrode portion 14, which is exposed at the cylindrical opening 1230 formed on the inlet side of the electrode mounting hole 1210 when the water-side electrode portion 14 is inserted from the outlet side of the electrode mounting hole 1210 shown in Figures 6 and 7. 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 sufficiently exposed from the cylindrical opening 1230, making it possible to always use tools such as wrenches.

[0089] Furthermore, the electrode connection section 16 has a cable connector 3 6 Ground cable 3 was routed into terminal room 1240 via 4 Multiple screw holes 1640 for connecting terminal 38 are formed in, for example, six locations. Therefore, the pulled-in earth cable 3 4 Even if the cable length is not constant, it is possible to connect the terminal to any screw hole 1640 that matches the cable length.

[0090] (b6. Main body cover) Next, we will describe the main body cover of the electrostatic dispersion head. For this description, please refer to Figure 12, which shows the main body cover removed from the unit. Figure 12(A) shows the top view, Figure 12(B) shows the front view, and Figure 12(C) shows the cross-section along the cutting line ff in Figure 12(B).

[0091] As shown in Figure 12, the main body cover portion 20 is manufactured as an insulating material, for example, by injection molding of polyvinyl chloride resin, and has a through hole 2020 formed through it. A lid portion 2010 is formed on the inlet side, which has a projection formed on its outer circumference as a hexagonal nut surface 2012. An external thread portion 2030 is formed on the outlet side, which screws into an internal thread portion 1250 provided inside the opening of the terminal chamber 1240 of the main body portion 12 as shown in Figures 6 and 7. A seal 2040 is placed in a seal groove formed between the lid portion 2010 and the external thread portion 2030.

[0092] The main body cover portion 20 is connected to the liquid conduit portion 18 shown in Figure 10 through a through hole 2020, and the external thread portion 2030 is screwed into the internal thread portion 1250 on the inside of the opening of the terminal chamber 1240 of the main body portion 12 shown in Figures 6 and 7 to close the opening on the inflow side of the terminal chamber 1240. The hexagonal nut surface 1210 formed on the lid portion 2010 can be easily and quickly turned using a tool such as a wrench.

[0093] (b7. Nozzle holding part) Next, the nozzle holder of the electrostatic spraying head will be described. For this description, please refer to Figure 13, which shows the nozzle holder removed from the unit. Figure 13(A) shows the top view, Figure 13(B) shows the front view, and Figure 13(C) shows the cross-section along the cutting line gg in Figure 13(B).

[0094] As shown in Figure 13, the nozzle holding portion 32 is manufactured from an insulating material, for example, by injection molding of polyvinyl chloride resin, and has a stepped hole through it for housing the nozzle portion 22. The stepped hole has a larger diameter on the inlet side and an internal threaded portion 3220 formed on its inner circumference, and a smaller diameter on the outlet side and a nozzle housing portion 3210 formed thereon, with a seal 3250 positioned between them as an inner circumferential step.

[0095] Furthermore, the outer circumference of the nozzle holding portion 32 is a hexagonal nut surface 3240, allowing for easy and simple screwing of the internal thread portion 3220 into the external thread portion 1440 of the water-side electrode portion 14 shown in Figure 8 using a tool such as a wrench.

[0096] Furthermore, if the nozzle size to be housed in the nozzle storage section 3210 is small, instead of using an internal thread section 3220, an external thread section may be formed on the outer circumference of the nozzle holding section 32 and screwed into the internal thread section 1450 of the water-side electrode section 14 shown in Figure 8. Alternatively, the nozzle section 22 and the nozzle holding section 32 may be integrated rather than being separated.

[0097] (b8.Fixed part) Next, we will describe the fixing part used in the electrode holding structure of the induction electrode section of the charge dispersion head. For this description, please refer to Figure 14, which shows the fixing part separately. Figure 14(A) shows the top view, Figure 14(B) shows the front view, and Figure 14(C) shows the cross-section of the cutting line hh in Figure 14(B).

[0098] As shown in Figure 14, the fixing part 28 is manufactured as an insulating material, for example, by injection molding of polyvinyl chloride resin, and is formed by a through hole through a cylindrical body. The through hole has an internal threaded portion 2810 on the inlet side and opens as a tapered portion 2830 on the outlet side, and chamfered portions 2820 are formed in four places on the outer circumferential surface of the fixing part 28.

[0099] The fixing portion 28, as shown in the cross-section of Figure 4, is used to fix the arm portion 26 to the groove portion 1280 of the main body portion 12. The internal thread portion 2810 is screwed into the arm fixing screw portion 1290 formed on the outflow side of the main body portion 12, as shown in Figures 6 and 7. When screwing, the internal thread portion 2810 can be easily and simply screwed into the arm fixing screw portion 1290 by aligning a tool such as a wrench with the chamfered portion 2820 and turning it.

[0100] (b9. Fixing plate section) Next, we will describe the fixing plate portion used in the electrode holding structure of the induction electrode section of the charge dispersion head. For this description, please refer to Figure 15, which shows the fixing plate portion separately. Figure 15(A) shows the plan view (top view), and Figure 15(B) shows the cross-section along cutting line ii of Figure 15(A).

[0101] As shown in Figure 15, the fixing plate portion 30 is manufactured as an insulating material, for example by injection molding of polyvinyl chloride resin, and is a ring plate member with a predetermined thickness (height in the vertical direction) and an opening hole 3010 that penetrates through the center. Notches 3020 for positioning the arm portion 26 are formed at three locations on the outer circumference, and a positioning projection 3030 is formed on the left side of the outer circumference to determine the position relative to the groove portion 1280 of the main body portion 12 shown in Figures 6 and 7.

[0102] (b10. Arm section) Next, we will describe the arm portion used in the electrode holding structure of the induction electrode section of the charge dispersion head. For this description, please refer to Figure 16, which shows the arm portion separated from the body. Figure 16(A) shows the left side, Figure 16(B) shows the front, and Figure 16(C) shows the right side.

[0103] As shown in Figure 16, the arm portion 26 is manufactured as an insulating material, for example, by injection molding of polyvinyl chloride resin, and is a rectangular arm-shaped member when viewed from the side. As shown in Figure 16(B), a pivot portion 2610 is formed on the right side of the upper end, extending upward, and a pressing portion 2620 is formed on the opposite side, extending to the left.

[0104] Furthermore, a trapezoidal recess, the electrode holding portion 2630, is formed on the left side of the lower end. The pressing portion 2620 of the arm portion 26 comes into contact with the plate portion located on the inner circumference side of the notch 3020 formed in the fixed plate portion 30 shown in Figure 15, which is fitted from the outflow side (bottom side), and is pressed from the outflow side.

[0105] (b11. Induction electrode part) Finally, the induction electrode section of the charge dispersal head will be described. For this description, please refer to Figure 17, which shows the induction electrode section separated from the head. Figure 17(A) shows the top view, and Figure 17(B) shows the front view, and Figure 17(A) shows the cross-section along the cutting line jj.

[0106] As shown in Figure 17, the induction electrode portion 24 is a ring portion 24 3 0 and support portion 2440 are formed. Ring portion 24 3 0 is an insulating coating 24 made of an insulating material such as polyvinyl chloride resin, which is used to cover an electrode core material 2420 made of a conductive material such as metal, as shown in the cross-section in Figure 17(C). 2 Covered with 0, ring portion 24 3The support portion 2440, which is taken out from a predetermined position 0 in the lateral direction (a direction perpendicular to the vertical direction, to the left in Figure 17) and then bent upward, also has a structure in which the electrode core material is insulated, and a conductive core material is pulled out from the upper part of the support portion 2440 as a cable connection portion 2450.

[0107] [c. Method for assembling an electrostatic spraying head with a strainer] Next, a method for assembling the electrostatic spraying head having a strainer according to the embodiment will be described. In this description, refer to Figure 18 showing the assembly of the water-side electrode part to the main body, Figure 19 showing the assembly of the strainer after assembly in Figure 18, Figure 20 showing the assembly of the liquid conduit part after assembly in Figure 19, Figure 21 showing the assembly of the electrode connecting part after assembly in Figure 20, Figure 22 showing the connection of the earth cable after assembly in Figure 21, Figure 23 showing the assembly of the main body cover part after connection in Figure 22, Figure 24 showing the assembly of the nozzle holding part housing the nozzle part after assembly in Figure 23, and Figure 25 showing the assembly of the induction electrode part using the electrode holding structure after assembly in Figure 24.

[0108] (c1. Assembly of the water-side electrode to the main body) First, the assembly of the water-side electrode to the main body, which is the first step, will be explained. As shown in Figure 18, the assembly of the water-side electrode 14 to the main body 12 involves inserting the water-side electrode 14 into the electrode mounting hole 1210 of the main body 12 from the outflow side (bottom side). This causes the hexagonal bolt surface 1420 of the water-side electrode 14 to fit into the hexagonal opening 1220 formed on the lower end side of the electrode mounting hole 1210, preventing the water-side electrode 14 from coming out of the electrode mounting hole 1210 of the main body 12 and from rotating around the head axis, as shown in Figure 19. After inserting the water-side electrode 14 into the electrode mounting hole 1210, the external thread portion 1430 at the upper end of the water-side electrode 14 is exposed in the cylindrical opening 1230 formed on the upper end side of the electrode mounting hole 1210 of the main body 12.

[0109] (c2. Strainer assembly) Next, we will explain the assembly of the strainer, which is the second step. As shown in Figure 19, the strainer 15 is assembled by inserting the strainer 15 into the strainer storage chamber 1412 formed in the internal flow path 1410 of the water-side electrode section 14, with the top of the mesh section 1520 facing upwards, from the inlet side (upper side).

[0110] (c3. Assembly of the liquid conduit section) Next, the assembly of the liquid conduit section, which is the third step, will be explained. As shown in Figure 20, the assembly of the liquid conduit section 18 is performed by inserting the lower end of the liquid conduit section 18, with the seal 1840 positioned below the flange 1830, into the internal flow path 1410 on the upper end side of the water-side electrode section 14, which is exposed at the cylindrical opening 1230 of the main body section 12. As shown in Figure 21, the liquid conduit section 18 is positioned on the inflow side (upper side) of the water-side electrode section 14 so that the internal flow path 1410 of the water-side electrode section 14 and the internal flow path 1810 of the liquid conduit section 18 are coaxial.

[0111] (c4. Assembly of the electrode connection section) Next, the assembly of the electrode connection section, which is the fourth step, will be explained. As shown in Figure 21, the assembly of the electrode connection section 16 involves inserting the liquid conduit section 18 through the through hole 1620 of the electrode connection section 16 from above into the liquid conduit section 18, which is arranged coaxially with the water-side electrode section 14 that is attached to the electrode mounting hole 1210 of the main body section 12, and then screwing the internal threaded portion 1630 of the electrode connection section 16 into the external threaded portion 1430 of the upper end of the water-side electrode section 14, thereby attaching and fixing the water-side electrode section 14, which houses the strainer 15 together with the liquid conduit section 18, into the electrode mounting hole 14.

[0112] In this case, the water-side electrode section 14 is prevented from rotating around the head axis by fitting its hexagonal bolt surface 1420 into the hexagonal opening 1220 of the main body section 12. Therefore, unlike conventional assembly methods, it is not necessary to hold the lower end of the water-side electrode section 14 with a tool. Instead, by fitting a tool such as a wrench into the hexagonal nut surface 1610 of the electrode connecting section 16 and rotating the electrode connecting section 16, the water-side electrode section 14, which houses the strainer 15 together with the liquid conduit section 18, can be easily and quickly attached and fixed to the main body section 12.

[0113] Furthermore, since the axial height (vertical direction) H2 of the electrode connecting portion 16 is greater than the axial depth (vertical direction) H1 of the cylindrical opening 1230, the upper side of the hexagonal nut surface 1610 of the electrode connecting portion 16 is sufficiently exposed above 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 22, this makes it easy to screw the electrode connecting portion 16 onto the water-side electrode portion 14, attach and fix the water-side electrode portion 14 with the strainer 15 housed in the electrode mounting hole 1210 of the main body portion 12, and to connect and fix the liquid conduit portion 16 to the upper side of the water-side electrode portion 14.

[0114] (c5. Connecting the ground cable) Next, we will explain the fifth step: connecting the earth cable. Earth cable 3 4 The tip of the wire is passed through the cable connector 36, and the terminal 38 is crimped onto the cable core wire that comes out of the cable connector 36 as a preliminary step. The cable connector 36 has a sealed structure that seals the opening through which the earth cable 34 passes when the earth cable 34 is passed through.

[0115] Next, as shown in Figure 22, the earth cable 34 is connected by screwing the cable connector 36 through a seal into the electrode connector mounting hole 1270 formed in the lateral direction (perpendicular to the vertical direction, to the right in Figure 22) of the terminal chamber 1240, and the earth cable 3 is taken out from the cable connector 36. 4 The screw 40 is passed through the through hole formed in the terminal 38 of the cable core wire, and the screw 40 is screwed into the screw hole 1640 of the electrode connecting part 16 to connect the ground cable 3 4 The electrode connection part 16 is connected and fixed. Here, the electrode connection part 16 has multiple screw holes 1640 formed therein, and the ground cable 3 taken out from the cable connector 36 is connected and fixed. 4 Even if there are variations in the length of the cable core wires, it is possible to connect the terminal 38 to any screw hole 1640 located at a position corresponding to the length.

[0116] (c6. Assembly of the main body cover) Next, we will explain the assembly of the main body cover, which is the sixth step. As shown in Figure 23, the main body cover 20 is assembled by passing the liquid conduit 18, which is attached and fixed by the electrode connecting part 16, through the through hole 2020 and fitting the main body cover 20 from above, and screwing the external thread portion 2030 of the main body cover 20 into the internal thread portion 1250 of the terminal chamber 1240 of the main body 12.

[0117] In this process, since a hexagonal nut surface 2012 is formed on the outer circumference of the lid portion 2010 of the main body cover portion 20, a tool such as a wrench can be fitted onto the hexagonal nut surface 2012 and turned, and there is no need to grip and turn the main body cover portion 20 with a tool such as needle-nose pliers. Therefore, the external thread portion 2030 of the main body cover portion 20 can be easily and simply screwed into the internal thread portion 1250 of the terminal chamber 1240 without damaging the main body cover portion 20 or the liquid conduit portion 18 that is exposed to the outside, thereby closing the opening on the inflow side of the terminal chamber 1240, and as shown in Figure 24, the assembly work on the inflow side (upper side) of the main body portion 12 is completed.

[0118] (c7. Assembly of the nozzle holder that houses the nozzle) Next, we will explain the assembly of the nozzle holder that houses the nozzle, which is the seventh step. As shown in Figure 24, the assembly of the nozzle holder 32 that houses the nozzle 22 is carried out by first preparing the nozzle holder 32 by fitting the nozzle 22 into the nozzle storage portion 3210 of the nozzle holder 32 via the seal 3250, and then attaching and fixing it as shown in Figure 25 by screwing the internal thread portion 3220 of the nozzle holder 32 into the external thread portion 1440 on the outflow side of the water side electrode portion 14 and sealing it with the seal 1222 of the main body portion 12.

[0119] In this embodiment, the internal thread portion 3220 of the nozzle holding portion 32, which houses the nozzle portion 22, is screwed into the external thread portion 1440 on the outflow side of the water-side electrode portion 14 for mounting and fixing. However, depending on the amount of water particles dispersed, in other embodiments, the internal thread portion 1450 on the inside of the lower end of the water-side electrode portion 14 may be used.

[0120] (c8. Assembly of the induction electrode section using the electrode holding structure) Finally, the assembly of the induction electrode section using the electrode holding structure, which is the eighth step, will be explained. As shown in Figure 25, the assembly of the induction electrode section using the electrode holding structure is as follows: First, the three arm sections 26 are fitted into the groove section 1280 opening on the lower side of the main body section 12 and positioned in the notch 3020 of the fixing plate section 30, and then the internal thread section 2810 of the fixing section 28 is fitted into the arm fixing screw section 1290 of the main body section 12 from below, and the ring section 24 of the induction electrode section 24 is aligned with the electrode holding section 2630 of the arm section 26. 3 Position 0, and in this state, screw the internal thread portion 2810 of the fixing portion 28 into the arm fixing thread portion 1290 of the main body portion 12.

[0121] As the internal thread portion 2810 of the fixing portion 28 is screwed into the arm fixing thread portion 1290 of the main body portion 12, the pressing portion 2620 of the arm portion 26 is pressed against the groove portion 1280 via the fixing plate portion 30, and the arm portion 26 tilts inward towards the electrode holding portion 2630 with the pivot point portion 2610 as the pivot point. At this time, the three arm portions 26 located in three places tilt inward simultaneously, so the induction electrode portion 24 located on the electrode holding portion 2630 is pressed against the ring portion 24 3 The central axis of 0 is centered so that it coincides with the head axis 35 of the nozzle section 22, and the induction electrode section 24 is mounted coaxially with the head axis 35 in the space on the outflow side of the nozzle section 22.

[0122] Furthermore, the ring portion 24 of the induction electrode portion 24 used in the embodiment 3 The size (diameter) of 0 is changed, for example, according to the discharge amount of the nozzle portion 22 used. For this reason, the shape of the arm portion 26 is the same for the pivot portion 2610 and the pressing portion 2620, but the shape of the electrode holding portion 2630 is the arm shape that corresponds to the size (diameter) of the induction electrode portion 24.

[0123] The assembly of the electrostatic spraying head with a strainer is completed through the assembly process consisting of these eight steps.

[0124] [d. How to replace the strainer] Next, we will explain how to replace the strainer incorporated into the electrostatic spraying head. For this explanation, please refer to Figure 26, which shows the assembled and disassembled state for strainer replacement.

[0125] As shown in Figure 26, the replacement of the strainer 15 of the electrostatic spraying head 10 is carried out in the following steps 9 to 13.

[0126] First, as the ninth step, the main body cover 20 is removed from the terminal chamber 1240 of the main body 12. The main body cover 20 can be easily and quickly removed by inserting a tool such as a wrench into the hexagonal nut surface 2012 and turning it.

[0127] Next, as the tenth step, the earth cable 34 to which the terminal 38 is connected to the electrode connection part 16 is removed. Specifically, the screw 40 is removed using a tool such as a screwdriver to remove the terminal 38 from the electrode connection part 16, and the cable connector 36 is removed from the electrode connector mounting hole 1270. Alternatively, the next step may be performed with the terminal 38 removed from the electrode connection part 16 by removing the screw 40 without removing the cable connector 36 from the electrode connector mounting hole 1270.

[0128] Next, in the 11th step, the electrode connecting part 16 and the liquid conduit part 18 are removed from the water-side electrode part 14, opening the inflow side of the internal flow path 1410 of the water-side electrode part 14. The electrode connecting part 16 can be easily and simply removed by inserting a tool such as a wrench into the hexagonal nut surface 1610 formed on the outer circumference of the electrode connecting part 16 and turning it.

[0129] Next, as the twelfth step, the strainer 15 housed in the strainer storage chamber 1412 of the water-side electrode section 14 is replaced. When replacing it, a new strainer 15 is prepared in advance and swapped in, or the removed strainer 15 is cleaned and returned. In addition, at the same time as replacing the strainer 15, cleaning of the internal flow path 1410 of the water-side electrode section 14, including the strainer chamber 1412, to remove dirt may also be performed.

[0130] Finally, as the 13th step, the assembly work of the inlet side (upper side) of the electrostatic spraying head, as described in the assembly method of the electrostatic spraying head including the strainer mentioned above, is repeated, and the replacement of the strainer 15 is completed.

[0131] [e. Variations of the present invention] Modified examples of the assembly method for a charged spraying head having a strainer according to the present invention will be described. In addition to the embodiments described above, the assembly method for a charged spraying head having a strainer according to the present invention includes the following modifications.

[0132] (Installation of the strainer during use) The above embodiment uses an electrostatic spray head with a built-in strainer, but it is not always necessary to have a strainer built in. For example, if there is a concern that the nozzle may become clogged during use of an electrostatic spray head without a strainer, a strainer may be built in according to the strainer replacement method described above. Conversely, if an electrostatic spray head with a built-in strainer is being used and there is no concern that the nozzle may become clogged, the strainer may be removed according to the strainer replacement method described above.

[0133] (Hexagonal opening, nut surface, and bolt surface) In the above embodiment, the corresponding openings, bolt faces, and nut faces are hexagonal in order to assemble using a wrench as the designated tool. However, the embodiment is not limited to this, and the shape may be a polygon such as a square, pentagon, or heptagon, depending on the shape of the designated tool used.

[0134] (others) Furthermore, the present invention is not limited to the embodiments described above, and includes appropriate modifications that do not impair its purpose and advantages, and is not limited by the numerical values ​​shown in the embodiments described above. [Explanation of Symbols]

[0135] 10: Electrostatic dispersal head 12: Main body 1210: Electrode mounting hole 1220:Hexagon opening 1222: Seal 1230: Cylindrical opening 1240:Terminal room 1250: Internal thread section 1260:Fixed surface part 1270: Electrode connector mounting hole 1280 : Groove 1290: Screw part for fixing the arm 14: Water side electrode part 1410: Internal flow path 1412: Strainer storage room 1414: Aperture section 1420: Hexagonal bolt face 1430, 1440: External thread section 1450: Internal thread section 15: Strainer 1510: Ring section 1520: Mesh section 16: Electrode connection part 1610: Hexagonal nut surface 1620: Through hole 1630: Internal thread section 1640: Screw hole 18:Liquid conduit section 1810: Internal flow path 1820:Danbe 1830: Tsuba (sword guard) 1840: Seal 1850: External thread section 20: Main body cover 2010: Lid 2012: Hexagonal nut surface 2020: Through-hole 2030: External thread section 2040: Seal 22: Nozzle section 2210: Nozzle hole 24: Induction electrode part 2410: Electrode core material 2420: Insulating coating 2430: Ring section 2440: Support part 2450: Cable connection part 26: Arm section 2610: Pivot point 2620: Pressing part 2630: Electrode holding part 28: Fixed part 2810: Internal thread section 2820: Chamfered section 2830: Tapered section 30: Fixing plate section 3010: Opening hole 3020: trigger 3030: Positioning protrusion 32: Nozzle holding part 3210: Nozzle storage compartment 3220: Internal thread section 3240: Hexagonal nut surface 3250: Seal 34: Ground cable 36: Cable connector 38: Terminals 40: Screw

Claims

1. A method for assembling a charged spraying head having a strainer, for spraying charged liquid particles onto a target area, The electrostatic spraying head comprises at least The main body and When a predetermined voltage is applied to charge the liquid particles to be dispersed, the water-side electrode portion serves as one of the electrodes, A liquid conduit section into which liquid for external spraying flows, An electrode connecting part that connects a power supply for applying a predetermined voltage to the water-side electrode part, A strainer that allows the liquid flowing into the liquid conduit to pass through and removes solid components contained in the liquid, A main body cover portion that closes the opening on the inlet side of the main body portion, Equipped with, A first step involves inserting the water-side electrode portion from the outflow side into the electrode mounting hole in the space formed through the main body portion, and holding the water-side electrode portion in the main body portion by a structure that prevents the water-side electrode portion from coming out or rotating in relation to the electrode mounting hole in the main body portion, A second step involves inserting the strainer from the inflow side into the internal flow path formed through the water-side electrode portion, A third step involves positioning the liquid conduit portion in accordance with the end of the water-side electrode portion exposed on the inflow side from the electrode mounting hole, A fourth step involves inserting the fitting portion of the electrode connecting portion into the liquid conduit portion from the inflow side through an opening where the fitting portion of the electrode connecting portion is formed, and fitting the fitting portion of the electrode connecting portion into a fitting receiving portion formed at the end of the water-side electrode portion, thereby mounting and fixing the water-side electrode portion, which houses the strainer, into the electrode mounting hole, and simultaneously connecting and fixing the liquid conduit portion to the water-side electrode portion. A fifth step involves connecting an earth cable, which has been drawn in from the outside, to the electrode connecting portion in a terminal chamber formed on the inflow side of the electrode mounting hole in the space formed through the main body, A sixth step involves closing the opening on the inflow side of the main body by inserting the fitting portion of the main body cover into the liquid conduit portion through the opening where the fitting portion of the main body cover portion is formed, and fitting the fitting portion of the main body cover portion into the fitting receiving portion formed in the terminal chamber, A method for assembling an electrostatic spraying head having a strainer, characterized by including [a certain element].

2. In a method for assembling an electrostatic spraying head having a strainer according to claim 1, The structure that prevents the water-side electrode from coming out of and rotating in relation to the electrode mounting hole of the main body is, A hexagonal bolt surface formed at a predetermined position between the outflow side and the inflow side of the water-side electrode portion, A hexagonal opening formed on the outflow side of the electrode mounting hole into which the hexagonal bolt surface is fitted, A method for assembling an electrostatic spraying head having a strainer characterized by being composed of the following.

3. A method for assembling a charged spraying head having a strainer, for spraying charged liquid particles onto a target area, The electrostatic spraying head comprises at least The main body and When a predetermined voltage is applied to charge the liquid particles to be dispersed, the water-side electrode portion serves as one of the electrodes, A liquid conduit section into which liquid for external spraying flows, An electrode connecting part that connects a power supply for applying a predetermined voltage to the water-side electrode part, A strainer that allows the liquid flowing into the liquid conduit to pass through and removes solid components contained in the liquid, A main body cover portion that closes the opening on the inlet side of the main body portion, Equipped with, The main body portion has an electrode mounting hole formed in a space that extends through it, having a cylindrical opening on the inlet side and a hexagonal opening on the outlet side, and a terminal chamber having a fitting receiving portion is formed on the inlet side of the electrode mounting hole. The water-side electrode portion has an internal flow path formed through it, a fitting receiving portion formed at the inlet end, a hexagonal bolt surface formed at a predetermined position between the outlet and inlet sides that fits into the hexagonal opening of the electrode mounting hole, and a strainer storage chamber formed within the internal flow path that allows the strainer to be detachably stored from the inlet side. The liquid conduit section is formed by passing through an internal channel that is arranged coaxially with the axis of the internal channel of the water-side electrode section after assembly. The electrode connecting portion is formed by a 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 circumference is a hexagonal nut surface that can be housed in the cylindrical opening of the electrode mounting hole. The main body cover portion has a through-hole formed therethrough, a fitting portion formed on the outflow side that fits into the fitting receiving portion of the terminal chamber, and a lid portion formed on the inflow side that has a portion with a hexagonal nut surface on its outer circumference. The first step involves inserting the water-side electrode portion into the electrode mounting hole of the main body portion from the outflow side, fitting the hexagonal bolt surface of the water-side electrode portion into the hexagonal opening of the electrode mounting hole, thereby preventing the water-side electrode portion from coming out of the electrode mounting hole and rotating, and holding the water-side electrode portion in the main body portion. A second step involves placing the strainer into the strainer storage chamber of the water-side electrode section from the inflow side, A third step involves positioning the liquid conduit portion at the end of the water-side electrode portion exposed in the cylindrical opening of the electrode mounting hole, such that the axis of the internal flow path of the water-side electrode portion and the axis of the internal flow path of the liquid conduit portion are coaxial. A fourth step involves passing the liquid conduit portion through the through-hole of the electrode connecting portion from the inflow side, and using a predetermined tool against the hexagonal nut surface of the electrode connecting portion to fit the fitting portion of the electrode connecting portion into the fitting receiving portion of the water-side electrode portion, thereby mounting and fixing the water-side electrode portion containing the strainer into the electrode mounting hole, and connecting and fixing the liquid conduit portion to the water-side electrode portion. A fifth step involves connecting the ground cable, which has been brought into the terminal chamber from the outside, to the electrode connecting portion. A sixth step involves passing the liquid conduit portion through the through-hole of the main body cover portion from the inflow side, and using a predetermined tool against the hexagonal nut surface of the main body cover portion to fit the fitting portion of the main body cover portion into the fitting receiving portion of the terminal chamber, thereby closing the opening on the inflow side of the terminal chamber. A method for assembling an electrostatic spraying head having a strainer, characterized by including [a certain element].

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

5. In a method for assembling an electrostatic spraying head having a strainer according to claim 3 or 4, A method for assembling an electrostatic spraying head having a strainer, characterized in that a wrench is used as the predetermined tool.

6. A method for assembling an electrostatic spraying head having a strainer according to claim 1 or 3, further, The aforementioned electrostatic dispersal head is A nozzle that releases liquid particles for spraying, When a predetermined voltage is applied to charge the liquid particles being sprayed, the other electrode becomes an induction electrode that charges the liquid particles released from the nozzle, An electrode holding structure that holds the induction electrode portion in the space that serves as the discharge destination for the nozzle portion, Equipped with, A seventh step involves attaching and fixing the nozzle portion to the end of the water-side electrode portion exposed to the outflow side through the electrode mounting hole, An eighth step involves holding the induction electrode portion with the electrode holding structure attached to the main body so that the induction electrode portion is positioned in the space to which the nozzle portion will be discharged, A method for assembling an electrostatic spraying head having a strainer, characterized by including [a certain element].

7. In a method for assembling an electrostatic spraying head having a strainer according to claim 1 or 3, When replacing the aforementioned strainer, A ninth step involves removing the main body cover from the terminal chamber, A tenth step involves removing the earth cable from the electrode connection portion, Step 11 involves removing the electrode connecting portion from the water-side electrode portion and removing the liquid conduit portion to open the inflow side of the internal flow path of the water-side electrode portion, A 12th step involves replacing the strainer housed in the internal flow path of the water-side electrode section, A thirteenth step involves repeating the second to sixth steps described above, A method for assembling an electrostatic spraying head having a strainer, characterized by including [a certain element].

8. In a method for assembling an electrostatic spraying head having a strainer according to claim 1 or 3, A method for assembling a charged spraying head having a strainer, characterized in that the main body, the liquid conduit, and the main body cover are made of a soft insulator, and the water-side electrode and the electrode connecting part are made of a conductor.

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