TW201940238A - Shield for spray nozzle can suppress the scattered liquid fine particles caused by the effect of wind in a spray nozzle - Google Patents

Abstract

The object of the present invention is configured to suppress the scattered liquid fine particles caused by the effect of wind in a spray nozzle. A shield (1) is provided with blades (13) erecting on the external surface of the shield body (11) toward the outside of the shield body (11). The blades (13) are disposed along a long axis (CL) defined by the long-hole-like cross-section of the end expanded portion (15) and are disposed separately via the mounting portion (17). According to this configuration, when the wind hits the direction intersecting to the longitudinal direction of the long-hole-like cross-section of the shield body (11) and the airflow passes over the shield body (11), the airflow will flow along the blades (13) and the plurality of ribs (25) of the blades (13) from the external surface of the shield body (11) and pass beyond the outer edge of the blades (13) to the leeward of the shield body (11) and the blades (13). At this time, the airflow is disturbed to form a spiral on the leeward of the shield body (11) and the blades (13). Due to this spiral airflow, the fine particles of the mixed fluid are pulled back to the shield body (11) and the blades (13) to stay in the vicinity of the leeward of the shield body (11) and the blades (13).

Description

Mask of spray nozzle

The present invention relates to a mask for a spray nozzle that sprays a liquid into a mist.

Traditionally, when a liquid is dispersed into a mist, a mask is mounted on a "spray nozzle that sprays the liquid into a mist" to perform a spraying operation. For example, Patent Document 1 discloses that in order to remove weeds in the field, a device that forms a "spray nozzle for spraying a herbicide" and serves as a hood portion is provided. This cover portion is a device for preventing the herbicide sprayed from the spray nozzle's spray port from being sprayed.
[Prior technical literature]
[Patent Literature]

[Patent Document 1] Japanese Patent No. 5037967

[Invention to solve the problem]

However, when the cover portion covering the spray nozzle described in Patent Document 1 is sprayed from the cover portion to the outside, the fine particles of the herbicide sprayed from the spray nozzle are scattered by the influence of wind, and they are also attached to the field. The problem of growing crops.

The present invention has been developed in view of the above-mentioned problems, and an object of the present invention is to suppress "the scattering of fine particles of a liquid due to the impact of wind" in a spray nozzle.

[Means for solving problems]

(Inventive Aspect)
The following aspects of the invention are examples illustrating the aspects of the present invention. In order to easily understand the various constituent elements of the present invention, they will be described item by item. The following items are not conditions for limiting the technical scope of the present invention, and even if reference is made to the best form for implementing the present invention, parts of the constituent elements of the items are replaced, deleted, or other components are further added. The aspect of the requirements is also one aspect of the present invention.

(1) A mask for a spray nozzle is a mask for a spray nozzle for spraying a liquid into a mist shape, and includes a cylindrical mask body covering at least the periphery of the spray nozzle of the spray nozzle; and a blade from the mask. The outer surface of the main body is erected toward the outside of the mask main body, and the main mask body has a long hole-shaped cross section from a base end including a "mounting portion to which the nozzle is fixed" to a "front end with an opening formed", The blade expansion portion is enlarged at least toward the longitudinal direction of the long hole-shaped cross section, and the blade is provided along the long axis of the long hole cross-sectional shape of the terminal expansion portion with a pair of the mounting portions (request item 1). ).

The mask of the spray nozzle of this aspect is provided with the cylindrical mask body which covers at least the periphery of the spray port of a spray nozzle. According to this structure, since the spray nozzle of the spray nozzle is covered by the cylindrical mask body, after the liquid has been sprayed from the spray nozzle's spray nozzle, the area in the vicinity of the spray nozzle is directed toward the shield without being affected by the wind. External spraying of the hood body. In addition, the mask main body has a long hole-shaped cross section from a base end including a "mounting part to which a spray nozzle is fixed" to a "front end with an opening formed", and at least faces the long hole section. The terminal expansion part whose diameter is enlarged in the longitudinal direction exerts the above-mentioned function in the internal space of the mask of this shape.

In addition, the mask of the spray nozzle according to this aspect includes a blade standing up from the outer surface of the mask body toward the outside of the mask body, and the blade follows the long axis of the cross-sectional shape of the elongated hole of the terminal expansion portion, A pair is provided across the mounting portion. According to this structure, when the wind hits a direction intersecting with the "long direction of the long hole-shaped cross section of the mask body", the air flow passes from the outer surface of the mask body when it passes over the end expansion portion of the mask body. It flows along the blade and passes over the outer edge of the blade, and flows to the leeward side of the shield body and the blade (that is, the surface opposite to the wind-receiving surface (upwind side)). At this time, on the downwind side of the shield body and the blades, the airflow is turbulent and spiral. By this spiral airflow, the fine particles of the liquid are pulled back to the mask body and the blade side, so that the fine particles of the liquid stay near the wind side below the shield body and the blade.

(2) In the mask of the spray nozzle according to the above item (1), the outer edge of the blade is formed from the front end of the mask body toward the base end, and is formed to incline more sharply than the end expansion portion toward the mask body. Stand outside (request 2).

In the mask of the spray nozzle of this item, the outer edge of the blade is formed to form "from the front end of the mask body toward the base end, forming a sharper slope than the end expansion part, and standing up to the outside of the mask body "On the base end side of the mask body, the area that receives wind increases. As a result, in accordance with the area of the blade, the area of the spiral airflow generated by the shield body and the downwind side of the blade is widened, and "the action of pulling fine particles of liquid back to the shield body and the blade side" is generated. The range becomes wider.

(3) In the mask of the spray nozzle according to the item (1) or (2), the tip expansion portion forms a tip expansion corresponding to "a spray pattern of a liquid sprayed from the spray nozzle fixed to the mounting portion". Shape (request item 3).

In the mask of the spray nozzle of this item, the end expansion portion is formed in a shape corresponding to the "spray pattern of the liquid sprayed from the spray nozzle" to prevent the liquid sprayed from the spray nozzle in a specific spray pattern. Contact the inner surface of the mask body to spray the liquid stably without waste.

(4) In the mask for the spray nozzle of any one of (1) to (3), the spray nozzle includes: a nozzle holder having a flow path extending from a base end to a front end; and a front spray plate. Is disposed on the front end side of the nozzle holder, and a slot for spraying liquid is formed; and a nozzle cap is used to hold the front spray plate on the front end of the nozzle holder; and a rectification core is disposed on the front spray Between the plate and the nozzle holder, a liquid is received from the flow path, and a plurality of guide flow paths are formed to guide the slot of the front spray plate; an orifice plate is arranged on the base of the nozzle holder. The end side is formed with a pinhole for supplying liquid to the aforementioned flow path of the nozzle holder; and an orifice core, which is arranged on the base end side of the nozzle holder more than the orifice plate, and is formed with liquid available The flow channel is formed with a strip-shaped throttle portion protruding toward the downstream side from the front spray plate, and the slot is formed so as to cross the strip-shaped throttle portion. In the rectification core, The front end width is reduced toward the slot of the front spray plate to form a shape. The wall surface constituting the rectifying projection is disposed on a downstream side of the wall surface constituting the plurality of guide channels, and the orifice plate is formed with a dome shape protruding toward the downstream side in a dome shape. The throttle portion is formed with the aforementioned pinhole on the top of the dome-shaped throttle portion (claim 4).

In the mask of the spray nozzle according to this aspect, according to the structure of the spray nozzle, the liquid is supplied to the flow path of the nozzle holder through the flow path of the orifice core and the pinhole of the orifice plate. Next, the liquid flowing from the flow path of the nozzle holder passes through the plurality of guide flow paths of the rectification core, is guided to the slot of the front spray plate, and is sprayed from the slot. In this spray nozzle, a strip-shaped throttle portion protruding in a stripe shape toward the downstream side is formed on the front spray plate, and a slot is formed in the strip-shaped throttle portion, so as to guide the flow path in the rectifying core. The liquid is concentrated in the strip-shaped throttle portion, and then passes through the slot of the strip-shaped throttle portion, and is sprayed toward the outside of the spray nozzle. In addition, since the rectifying core has a rectifying protruding portion "the front end width decreases toward the slot formed in the strip-shaped throttle portion", the liquid flowing through the guiding flow path of the rectifying core to the slot follows the structure. The wall surface of the flow straightening protrusion is guided, and flows smoothly toward the strip-shaped throttle portion "disposed on the downstream side of the wall surface constituting the guide flow path". Then, the liquid flows in a gap between the strip-shaped throttle portion and the rectifying protrusion, and is sprayed from a slot formed in the strip-shaped throttle portion. At this time, the liquid sprayed from the slot reduces the proportion of fine particles that are susceptible to wind and the proportion of particles having a large particle diameter that are not easily diffused, and sprays the particles suitable for spraying toward the outside of the spray nozzle. In addition, according to the structure of the above-mentioned spray nozzle, the liquid supplied to the orifice plate is supplied to the orifice plate through the "flow path of the orifice core located more upstream than the orifice plate on the flow path". The liquid concentrates on "the top of the dome formed in the orifice plate and protruding toward the downstream side into a dome-shaped throttle portion", and the pinhole formed on the top of the dome-shaped throttle portion faces the nozzle The flow path of the seat flows smoothly.

(5) In the mask of the spray nozzle according to the item (4), the flow path of the nozzle holder is branched on the downstream side, and the front spray plate is disposed on the downstream side of each of the branched flow paths. , The aforementioned nozzle cap, and the aforementioned rectifying core (request 5).

In the mask of the spray nozzle of this item, the flow path of the nozzle holder diverges on the downstream side, and in each of the divergent directions, the effect obtained by the mask of the spray nozzle of the item (4) above is obtained. The same effect enables the mixed fluid to spread toward different directions at the same time.

(6) In the mask of the spray nozzle according to the item (4) or (5), the flow path of the orifice core is inclined with respect to an axis of an extension direction of the flow path of the nozzle holder.

In the mask of the spray nozzle according to this item, according to the structure of the orifice core described above, the flow path of the orifice core is inclined with respect to the axis of the extension direction of the flow path of the nozzle holder. Regardless of the flow state before passing through the flow path, the liquid can correct the flow direction by the flow path and become a swirling flow on the downstream side of the orifice core. This swirling flow can be maintained even in the dome of the dome-shaped throttle portion of the orifice plate, and the liquid flow flowing from the pinhole of the orifice plate to the nozzle holder is rectified, thereby making the flow The mixed state of liquid and air in the road is stable.

(7) The mask for a spray nozzle according to any one of the above (1) to (6), wherein the tip expansion portion includes a holding portion (request item 5) for holding the blade in a removable manner.

The mask of the spray nozzle of this item is provided with a holding portion for holding the blade in a detachable manner at the end expansion portion, and the blade can be attached, detached, and replaced according to needs such as damage, shape change, and the like.

(8) In the mask of the spray nozzle of any one of (1) to (7) above, the mask body is transparent (request item 6).

In the mask of the spray nozzle of this item, since the mask body is transparent, the operator can visually inspect the inside of the mask body, confirm the spray mode of the sprayed liquid, and remind the operator to appropriately adjust the spray pressure according to the spray pressure. .

[Effect of the invention]

According to the present invention, in the spray nozzle, the scattering of fine particles of the liquid due to the influence of the wind can be suppressed.

The structure of a mask of a spray nozzle according to one embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5.
In the following description, for convenience of explanation, the lower end of the mask 1 in Figs. 1 to 3 and 6 is defined as the front end 11a (downstream side), and the upper end is defined as the base end 11b. (Upstream side). Similarly, the lower end in FIGS. 4 and 5 is defined as the base end (upstream side), and the upper end is defined as the front end (downstream side). In addition, the right side in FIGS. 7 and 8 is the upwind side, and the left side is the downwind side.
In the following description, a case where a “mixed fluid of air and a chemical solution (liquid)” is sprayed from the spray nozzle 3 will be described.

As shown in FIGS. 1 to 3, the mask 1 covers the spray nozzle 3 and is a member that prevents small particles in the mixed fluid sprayed from the spray nozzle 3 from being scattered by the influence of wind. The mask 1 includes a mask body 11 and a blade 13. The spray nozzle 3 passes through a plate 31 and a connecting member 33 described later, and is connected to the cover 1 by a locking member 43.

The mask body 11 is made of a transparent material and is formed in a substantially cylindrical shape so as to cover at least the periphery of the spray plate 59 (ejection port) before the spray nozzle 3, and includes a terminal expansion portion 15, a mounting portion 17, a holding portion 19, and a reinforcing rib. 23, an opening 21 is formed at the front end. The distal expansion portion 15 maintains a long hole-shaped cross section from the base end 11b toward the front end 11a, and expands the diameter at least toward the long side direction of the long hole cross section (see FIG. 2). Specifically, the distal end expansion portion 15 is formed in a shape corresponding to the distal end expansion of the “spray pattern of the mixed fluid sprayed from the spray nozzle 3 fixed to the mounting portion 17 (see details below)”. In addition, in the plan view, the distal expansion portion 15 is closer to the front end 11a side from the base end side 11b side, which is slightly round, and the length of the long side in the shape of a long hole increases accordingly. The shape changes into a hole-like shape ", and the long hole-like cross section of the terminal expansion portion 15 is enlarged in diameter toward the long side. In the example shown in the figure, the long hole shape has a shape of "a semicircular end portion in the longitudinal direction of the rectangle", but may be appropriately changed to an oval shape or an oval-like shape. The mounting portion 17 has a substantially cylindrical shape "reduced in diameter from the front end 11a toward the base end 11b", and the spray nozzle 3 is mounted inside. In addition, the end surface on the base end side of the mounting portion 17 is reduced in diameter so as to "incline and incline from the outside in the radial direction toward the inside", and an opening 17a through which the supply pipe 67 can pass is formed, and it can be used for locking A plurality of (two in this embodiment) through-holes 17b, 17b (see FIG. 3) through which the component 43 passes. The holding portion 19 is a pair of ribs extending along the longitudinal direction of the long hole-shaped cross section of the distal end expansion portion 15 and is provided from the base end to the front end of the mask body 11. A pair of ribs constituting the holding portion 19 are provided at predetermined intervals, and are suitable for holding and holding the blade 13. The reinforcing ribs 23 are provided so as to extend in the "peripheral direction of the outer peripheral surface in the short-side direction of the terminal expansion portion 15" (in the present embodiment, one is provided on each side of the long-side direction of the terminal expansion portion 15 and a total of two ) Is a member for reinforcing the terminal expansion portion 15.

The blade 13 is made of a transparent material and follows the long axis CL of the long hole-shaped cross-section of the end expansion portion 15 (for the convenience of explanation, it is shown in FIG. 1 and FIG. 2 as the long axis passing through the front end 11a. ), A pair is detachably provided in the holding portion 19 via the mounting portion 17. The outer edge 13oe of the blade 13 is formed from the front end 11a of the mask body 11 toward the base end 11b, and is formed more steeply than the terminal expansion portion 15 (refer to FIG. 1 and FIG. 2). In addition, a plurality of ribs 25 (four in this embodiment) are formed on both surfaces of the blade 13. As shown in FIG. 2 and FIG. 3, the plurality of ribs 25 are formed to extend from the outer edge 13oe to the vicinity of the inner edge 13ie (see FIG. 3).

Here, the plate 31 (refer to FIG. 2 and FIG. 3) has a shape that imitates the “inner end face of the base end side of the mounting portion 17 of the mask body 11” and has an opening 31 a into which the supply pipe 67 can be inserted. And through holes 31b (two in this embodiment) through which the locking member 43 can pass (refer to FIG. 3). The connecting member 33 is a member for connecting the mask 1 and the spray nozzle 3, and includes a flow path 35, and a filter 37, a ring member 39, and an O-ring 41 are attached. The flow path 35 communicates with the flow path 77 (see FIG. 4) of the first nozzle holder 52 of the nozzle holder 51 and the flow path 67 a (see FIG. 1 and FIG. 3) of the supply pipe 67. The filter 37 is a member for filtering solid matters in the medicinal solution, and is provided on the downstream side of the connection member 33. The ring member 39 is a member that prevents the filter 37 from falling out of the flow path 35 by the pressure of the chemical solution supplied from the supply pipe 67, and is provided on the downstream side of the connection member 33 than the filter 37. The O-ring 41 is a member for preventing the "liquid leakage between the supply pipe 67 and the connection member 33", and is provided on the upstream side of the connection member 33.

Next, the structure of the spray nozzle 3 will be described in detail based on FIGS. 3 to 5.
As shown in FIG. 3, the spray nozzle 3 includes a nozzle holder 51, a rectifying core 53, an orifice plate 55, an orifice core 57, a front spray plate 59, a nozzle cap 61, an O-ring 63, and a coupling 65. The spray nozzle 3 passes through the plate 31 and the connecting member 33 and is attached to the mask 1 by a locking member 43.

The nozzle holder 51 is connected to the supply pipe 67 through a connecting member 33 at a base end side, and includes a first nozzle holder 52 and a second nozzle holder 54. The first nozzle holder 52 includes a flow path 77, an air introduction path 79, a large diameter portion 83, and a storage portion 84. In addition, a first annular locking portion 86 is formed in the outer peripheral portion on the front end side of the first nozzle socket 52 so as to have a truncated cone shape and protrude outward in the radial direction as it goes toward the base end side. A flange portion 73 is formed on an outer peripheral portion of the proximal end side of the first nozzle holder 52 from the outer peripheral portion to the radially outer side. When the first nozzle holder 52 is forcibly fitted into the second nozzle holder 54, the front end side of the first nozzle holder 52 is pressed into the connecting portion 90 of the second nozzle holder 54 (please refer to the description below). In the inner peripheral portion, the first annular locking portion 86 of the first nozzle socket 52 is elastically deformed by the second annular locking portion 88 of the second nozzle socket 54 (please refer to the description below). The first nozzle holder 52 is pushed into a predetermined position, and the shape of the first annular locking portion 86 is elastically restored. The first annular locking portion 86 and the second annular locking portion 88 are engaged and connected.于 第 nozzle socket 54.

The flow path 77 of the first nozzle holder 52 communicates with the storage portion 84 and extends in the axial direction toward the front end side of the nozzle holder 51. The introduction passages 79 are formed in order to form an opening from the outer wall portion of the first nozzle holder 52 toward the "communication position between the flow path 77 and the storage portion 84" (two in this embodiment). This introduction passage 79 is a member located further downstream than the pinhole 97 of the orifice plate 55 (that is, the top of the orifice plate 55, please refer to the following description). The large-diameter portion 83 is provided on the base end side of the first nozzle holder 52 and houses the orifice plate 55 and the orifice core 57. The accommodating portion 84 and the larger diameter portion 83 are further provided on the front end side of the first nozzle holder 52, communicate with the flow path 77, and accommodate the dome-shaped throttle portion 95 of the orifice plate 55 (see the description below).

The second nozzle holder 54 includes a connection portion 90 connected to the outer peripheral portion of the front end side of the first nozzle holder 52, and a branch portion 92. The branch portion 92 includes a first branch branched from the connection portion 90 to form two branches. Flow path 94 and second branched flow path 96. A second annular locking portion 88 is formed on an inner peripheral portion of the connecting portion 90 of the second nozzle socket 54 (refer to FIGS. 4 and 5 (b)). The second annular locking portion 88, When the first ring-shaped locking portion 86 is forcibly inserted, the first ring-shaped locking portion 86 is elastically deformed, and in order to be engaged with the first ring-shaped locking portion 86 when the forced insertion is completed, a constant (constant) The diameter protrudes into a band shape toward the inside in the radial direction. In addition, an inner peripheral portion of the connecting portion 90 is formed with an inclined portion 98 (refer to FIG. 5 (see FIG. 5) for accommodating the first annular locking portion 86 and having a shape complementary to the first annular locking portion 86. b)).

The first branched flow path 94 and the second branched flow path 96 of the branching portion 92 are branched at a predetermined angle, and each communicates with the flow path 77 of the first nozzle holder 52. The branching portion 92 has a male screw portion 69 formed on the outer peripheral portion on the front end side thereof to be engaged with the female screw portion 111 of the nozzle cap 61. In addition, the branching portion 92 is formed with positioning holes 81 (two in this embodiment) into which one of the rectifying cores 53 can be inserted into the pair of second positioning protrusions 93 and 93 (see the description below). The positioning hole 81 is formed with a depth that can be inserted into the pair of second positioning protrusions 93 and 93 and a diameter that can be fitted. A rectifying core 53, an O-ring 63, a front spray plate 59, and a nozzle cap 61 are attached to a front end side of the branch portion 92.

The rectifying core 53 is formed in a substantially flat plate shape, and is arranged on an end surface on the front end side of the branching portion 92 of the second nozzle holder 54 (see FIGS. 4 and 5 (a)). The rectifying core 53 is provided with a guide flow path 85 (refer to FIG. 5 (a)), and a rectifying protrusion 87 and a pair of first positioning protrusions 89 and 89 are formed on the downstream surface (refer to FIG. 5). (a)) A raised portion 91 and a pair of second positioning protrusions 93 and 93 are formed on the upstream surface (see FIG. 4). The guide flow path 85 is a member for guiding the mixed fluid flowing in the first branch flow path 94 and the second branch flow path 96 to the slot 107 (please refer to the description below) of the front spray plate 59 to form There are a plurality of them (two in this embodiment). The rectifying protrusion 87 is a protrusion having a mountain shape in front view, that is, the width of the front end is reduced toward the slot 107 of the front spray plate 59 (refer to FIG. 5 (a)). The rectifying protrusion 87 is disposed at a substantially center of the surface on the upstream side, and the wall surface of the rectifying protrusion 87 is disposed on the downstream side of the wall surface constituting the plurality of guide channels 85 and 85. A pair of first positioning protrusions 89 and 89 extend toward the strip-shaped throttle portion 105 of the front spray plate 59 (please refer to the description below), and are arranged so as to interact with the guide flow paths 85 and 85 and the rectification in a plan view. The protrusions 87 are straight (see FIGS. 4 and 5 (a)). The bulge portion 91 extends toward the first branched flow path 94 and the second branched flow path 96 from the slightly center toward the axial direction of the first branched flow path 94 and the second branched flow path 96, and is disposed in the guide flow. Between 85 and 85 (please refer to Figure 5 (a)). A pair of second positioning protrusions 93 and 93 are formed in a substantially cylindrical shape and formed in a plurality (two in the present embodiment), and follow the first branched flow path 94 and the second from the surface on the upstream side of the rectification core 53. The branched flow path 96 extends in the axial direction.

The orifice plate 55 is formed in a dome shape, and is located more upstream than the introduction passage 79 of the first nozzle holder 52, and is provided at the large-diameter portion 83 of the first nozzle holder 52 (refer to FIG. 4). The orifice plate 55 includes a dome-shaped throttle portion 95 that is stored in a storage portion 84. A pinhole 97 is formed on the top of the dome-shaped throttle portion 95 to receive the medicinal solution from the upstream side and to supply the medicinal solution to the storage portion 84.

The orifice core 57 is formed in a slightly circular plate shape, and is located more upstream than the orifice plate 55, and is provided at the large-diameter portion 83 of the first nozzle holder 52 (refer to FIG. 5 (b)). The orifice core 57 is formed with a medicinal solution flow path 99 (flow path) and a first protrusion 101 (see FIG. 4) on the outer peripheral surface, and a second protrusion 103 is formed on the upstream surface. The chemical liquid flow path 99 is inclined with respect to the extending direction axis of the flow path 77 of the first nozzle holder 52 (refer to the dotted line in FIG. 4), and is set in the circumferential direction at an interval of 180 degrees. The first protruding portion 101 extends radially outward from a part of the outer periphery (refer to FIG. 4). After the orifice core 57 is attached to the large-diameter portion 83 of the first nozzle holder 52, an orifice core is provided. 57 is a member that has fallen off from the large-diameter portion 83. The second protruding portion 103 is formed with a hooking portion 103a that can be hooked by a user's finger when the orifice core 57 is taken out (see FIGS. 4 and 5 (b)).

The front spray plate 59 is a substantially circular plate, and is disposed on the front end side of the branch portion 92 of the second nozzle socket 54. The front spray plate 59 includes a strip-shaped throttle portion 105 and a slot 107. The strip-shaped throttle portion 105 protrudes into a strip shape toward the downstream side, and an engagement portion 105 a is formed to be engaged with the “pair of first positioning protrusions 89, 89 of the rectifying core 53”. The slot 107 is formed in such a manner that the strip-shaped throttle portion 105 is formed at a substantially center in the long-side direction of the strip-shaped throttle portion 105 and intersects at right angles to "the extending direction of the strip-shaped throttle portion 105" In the direction of at least the apex portion of the strip-shaped throttle portion 105 is divided.

The nozzle cap 61 is formed in a substantially cylindrical shape and is a member that holds the front spray plate 59 at the tip of the branching portion 92 of the second nozzle holder 54. The nozzle cap 61 is formed with an annular protrusion 109 extending from the inner peripheral portion on the front end side toward the radially inner side, and the annular protrusion 109 can flow through the first branched flow path 94 and the first The pressure of the mixed fluid in the 2 branch flow path 96 prevents the front spray plate 59 from being pulled out of the nozzle cap 61 (refer to FIGS. 4 and 5 (a)). In addition, a female screw portion 111 (refer to FIG. 3 and FIG. 4) that is locked to the male screw portion 69 of the second nozzle socket 54 is formed on the inner peripheral portion of the nozzle cap 61. An O-ring 63 is disposed between the end surface on the front end side of the second nozzle holder 54 and the front spray plate 59 so as to surround the outer periphery of the rectifying core 53. The O-ring 63 prevents the second nozzle Liquid leakage between the seat 54 and the front spray plate 59.

The connecting tool 65 is formed in a substantially cylindrical shape and is a member for connecting the first nozzle holder 52 and the connecting member 33. The coupling tool 65 is formed with an annular projection 113 extending from the inner peripheral portion on the front end side toward the inside in the radial direction and abutting on the flange portion 73 of the first nozzle holder 52, and the annular projection 113. The first nozzle holder 52 cannot be pulled out of the coupling 65 by the pressure of the chemical solution flowing through the supply pipe 67 (refer to FIG. 4). In addition, a female screw portion 115 (refer to FIG. 3) that is locked to a male screw portion 45 (see FIG. 3) of the connecting member 33 is formed on an inner peripheral portion of the connecting tool 65.

Next, the flow of the mixed fluid in the spray nozzle 3 to which the mask 1 according to one embodiment of the present invention is attached will be described below.
First, the chemical solution supplied from a chemical solution tank (not shown in the figure), etc., and flowing through the supply pipe 67 passes through the flow path 35 of the connecting member 33 and the filter 37, and then faces the first nozzle holder 52. The large-diameter portion 83 flows in (refer to arrow a in Fig. 5 (b)). Next, the medicinal solution flows through the medicinal solution flow path 99 of the orifice core 57 toward the dome-shaped throttle portion 95 of the orifice plate 55 (refer to arrows b in FIGS. 4 and 5 (b)). . At this time, the medicinal solution passes through the medicinal solution flow path 99 into a swirling flow, and then flows into the dome-shaped throttle portion 95 (see arrows c in FIGS. 4 and 5 (b)). Then, the chemical solution passes through the pinhole 97 of the orifice plate 55 and flows into the storage portion 84 of the first nozzle holder 52. At this time, the communication position of the medicinal solution between the flow path 77 and the accommodating part 84 is mixed with the "air introduced from the introduction path 79" and flows to the flow path 77 (refer to Figs. Arrow d). In addition, the medicinal solution that has passed through the pinhole 97 flows into the storage section 84 while maintaining a swirling flow, thereby stabilizing the "flow of air introduced into the storage section 84 from the introduction path 79" and contributing to Stabilization of the particle diameter of the sprayed bubble particles "and" the spray mode thereof ".

Next, the mixed fluid flowing in the flow path 77 is branched into the first separation flow path 94 and the second branch flow path 96 of the branching portion 92 of the second nozzle holder 54 (refer to arrow e in FIG. 4). Next, the mixed fluids flowing through the first separation flow path 94 and the second branch flow path 96 pass through the guide flow paths 85 and 85 of the rectification core 53, respectively. At this time, the mixed fluid hits the bulging portion 91 of the rectifying core 53 to change the flow direction of the mixed fluid and guide the guide flow paths 85 and 85 (refer to arrow f in FIG. 5 (a)). Next, the mixed fluid flowing in the guide flow paths 85 and 85 passes through the gap between the rectifying protrusion 87 and the strip-shaped throttle 105 of the front spray plate 59 (refer to arrow g in FIG. 5 (a)). , Spray through the slot 107 in both directions (please refer to arrows h in Figure 4 and Figure 5 (a)). Here, by adjusting the spray pressure of the mixed fluid to an appropriate pressure (refer to the dotted line in FIG. 6 (a)), the mixed fluid sprayed through the slot 107 of the front spray plate 59 does not contact the mask body 11 On the inner surface of the distal end expansion portion 15, the mixed fluid is sprayed from the opening 21 of the mask 1 toward the outside.

When spraying the mixed fluid from the spray nozzle 3 as described above, when the spray pressure of the mixed fluid is higher than an appropriate pressure (refer to the dotted line in FIG. 6 (b)), the mixed fluid sprayed through the slot 107 of the front spray plate 59 , Spraying toward a wider area, locally contacting the inner surface of the end expansion portion 15 of the mask body 11, and spraying from the opening 21 of the mask 1 to the outside. In this case, the operator can check the spray mode of the mixed fluid inside the transparent mask body 11 through the transparent mask body 11 and help to adjust the spray pressure of the mixed fluid to an appropriate pressure.

According to the mask 1 and the spray nozzle 3 of the spray nozzle 3 having one of the embodiments described above, the following effects can be obtained.
First, in the mask 1 of the spray nozzle 3, the spray nozzle 3 is covered by the cylindrical mask body 11. Therefore, after the mixed fluid is sprayed from the front spray plate 59 of the spray nozzle 3, it will not be near the front spray plate 59. Affected by the wind, the mixed fluid is sprayed toward the outside of the mask body 11. In addition, the mask body 11 has a long hole-shaped cross section from the base end 11b including the "mounting portion 17 to which the spray nozzle 3 is fixed" to the "front end 11a where the opening 21 is formed", and at least The terminal expansion portion 15 which is enlarged in diameter in the longitudinal direction of the long hole-shaped cross section can exert the above-mentioned function in the internal space of the mask 1 of this shape.

In addition, the mask 1 of the spray nozzle 3 is provided with a blade 13 standing up from the outer surface of the mask body 11 toward the outside of the mask body 11, and the blade 13 follows a long hole-shaped cross section of the end expansion portion 15. A pair of long axes CL are provided across the mounting portion 17. Therefore, when the wind hits a direction intersecting with the “long direction of the long hole-shaped cross section of the mask body 11”, when the airflow passes over the mask body 11 In the case where the terminal expansion portion 15 extends from the outer surface of the mask body 11 along the blades 13 and the plurality of ribs 25 of the blades 13, it passes over the outer edge 13oe of the blades 13 and flows to the downwind side of the mask bodies 11 and the blades 13. At this time, on the leeward side of the shield main body 11 and the blades 13, the airflow is turbulent and spiral (refer to FIG. 7 (a)). By this spiral airflow, the fine particles of the mixed fluid are pulled back to the side of the mask body 11 and the blades 13, and the fine particles of the mixed fluid can be kept near the wind side below the mask body 11 and the blades 13.

In addition, in the mask 1 of the spray nozzle 3, the outer edge 13oe of the blade 13 is formed by "from the front end of the mask body 11 to the base end, forming a sharper slope than the end expansion part 15, and toward the cover The cover body 11 rises outside ", and the area to receive wind increases at the base end side of the cover body 11. As a result, the area of the spiral airflow generated on the downwind side of the mask body 11 and the blade 13 is widened corresponding to the area of the blade 13, and “the fine particles of the mixed fluid are drawn back to the mask body 11 and the blade 13 The range of "side-side action" is widened.

Further, in the mask 1 of the spray nozzle 3, the tip expansion portion 15 is formed in a shape corresponding to the "spray pattern of the mixed fluid sprayed from the spray nozzle 3" to prevent the specific spray from being sprayed from the spray nozzle 3 The mixed fluid sprayed in a pattern can contact the inner surface of the mask body 11 and can stably spray the liquid without waste.

In addition, in the spray nozzle 3, the liquid sprayed from the slot 107 of the front spray plate 59 by the flow of the mixed fluid in the spray nozzle 3 reduces the proportion of fine particles that are easily affected by wind, and particles that are not easily diffused. The proportion of the particles having a larger diameter can be sprayed toward the outside of the spray nozzle 3 with particles suitable for spraying.

In addition, in the spray nozzle 3, the chemical solution passing through the chemical solution flow path 99 of the orifice core 57 becomes a swirling flow due to the structure of the orifice core 57 described above, and therefore, the pinhole 97 from the orifice plate 55 faces The liquid flow flowing through the flow path 77 of the first nozzle holder 52 is rectified, and the mixed state of the chemical liquid and the air at the "communication position between the flow path 77 and the storage portion 84" can be stabilized.

In addition, the mask 1 of the spray nozzle 3 is provided with a holding portion 19 that holds the blade 13 in a detachable manner, and the blade 13 can be attached and detached and replaced according to needs such as damage, shape change, and the like.

In addition, in the mask 1 of the spray nozzle 3, since the mask body 11 is transparent, the operator can visually inspect the inside of the mask body 11 to confirm the spray mode of the sprayed mixed fluid, and can remind the operator according to the spray pressure Adjust the spray pressure appropriately.

Although in the mask 1 of the spray nozzle 3 of one embodiment, the mask body 11 and the blades 13 are transparent, the transparency can also be adjusted within the range of "the inside of the mask body 11 can be visually observed".

In addition, in the mask 1 of the spray nozzle 3, when the operator wants to change the spreading range or the wind direction changes, by rotating the mask 1, the spray nozzle 3 connected by the connecting member 33 can also be rotated to become A structure capable of appropriately changing the position angle of the mask body 11 and the blade 13.

In addition, in the mask 1 of the spray nozzle 3 of one embodiment, although the outer edge 13oe of the blade 13 goes from the front end 11a of the mask body 11 toward the base end 11b, it becomes more steeply inclined than the terminal expansion portion 15, but The inclination angle can be changed as appropriate, and other complicated shapes can be formed.

Further, in the mask 1 of the spray nozzle 3 of one embodiment, although four ribs 25 are formed on both sides of the blade 13, the number of the ribs 25 may be appropriately changed, or a blade without the ribs 25 may be used. (Ie, plate-shaped leaves).

In the mask 1 of the spray nozzle 3 according to one of the embodiments, the blade 13 is detachably provided on the holding portion 19 through the mounting portion 17 along the long hole CL of the long hole-shaped cross-sectional shape of the terminal expansion portion 15. One pair, but the number of blades 13 can be changed as appropriate. In addition, although the blades 13 are provided perpendicular to the end expansion portion 15, for example, the blades 13 may be provided to be inclined toward the upwind side or the downwind side, and the inclination angle may be appropriately changed.

Moreover, in the example shown in the figure, although the spray nozzle 3 with the mask 1 attached is a spray nozzle 3 that sprays the mixed fluid in two directions, the spray port of the spray nozzle may be formed as a single port to mix A spray nozzle that sprays fluid in a single direction.

Hereinafter, the dispersion state of particles of the mixed fluid formed by the spray nozzle 3 of the mask 1 according to one embodiment of the present invention will be described based on examples.
The condition of this embodiment is that a wind having a wind speed of 2 m is hit from a direction intersecting with the “long direction of the long hole-shaped cross section of the mask body 11”. In addition, the dispersion state of the mixed fluid is photographed by a high-speed camera, and the pathline of the air flow is composed of 1,000 images per second.
As a result, it was confirmed that the fine particles of the mixed fluid were pulled back to the mask by the vortex (spiral flow, see FIG. 7 (a)) generated on the downwind side of the mask body 11 and the blades 13. The leeward side of the main body 11 and the blade 13 (please refer to FIG. 7 (b)) and stay on the leeward side. In this way, according to the embodiment of the present invention, it is clear that the scattering of the fine particles of the liquid due to the influence of the wind is suppressed.

In addition, the dispersion state of the particles of the mixed fluid of the spray nozzle 3 to which the conventional cover 121 (specifically, the cover 121 without a blade) was attached was confirmed as a comparative example. The conditions of the comparative examples are the same as those of the above examples.
As a result, it was confirmed that a laminar flow is formed on the downwind side of the mask body 11 and the blades 13 (refer to FIG. 8 (a)). Therefore, the fine particles of the mixed fluid will be scattered by the air flow. (Please refer to Figure 8 (b)).

1‧‧‧Mask

3‧‧‧ spray nozzle

11‧‧‧Mask body

13‧‧‧ Blade

15‧‧‧ terminal expansion

17‧‧‧Mounting Department

21‧‧‧ opening

FIG. 1 is a perspective view of a mask of a spray nozzle according to an embodiment of the present invention.

Fig. 2 is a sectional view of the spray nozzle and the mask of the spray nozzle shown in Fig. 1.

Fig. 3 is an exploded view of a mask of the spray nozzle shown in Fig. 1.

Fig. 4 is a cross-sectional view of a spray nozzle along "the short-side direction of the long hole-shaped cross section of the terminal expansion portion of the mask shown in Fig. 2".

Fig. 5 is a partial cross-sectional view of the spray nozzle shown in Fig. 4, where (a) is a cross-sectional view taken along line A-A, and (b) is a cross-sectional view taken along line B-B.

FIG. 6 is a view schematically showing a spray pattern of a liquid sprayed from a spray nozzle shown in FIG. 2, where (a) is a view showing a spray mode of spraying a liquid at an appropriate pressure, and (b) is a view showing a spray mode Illustration of a spray pattern of a liquid sprayed at high pressure.

Fig. 7 is a diagram showing the state of the air flow and the dispersion of liquid particles in a state where the wind with a wind speed of 2 m collides with "the mask of the spray nozzle shown in Fig. 1", where (a) is a view showing the air flow, (b ) Is a diagram showing the dispersion state of liquid particles.

Fig. 8 is a diagram showing the state of the air flow and the dispersion of liquid particles in a state where the wind with a wind speed of 2 m collides with the "mask of a conventional spray nozzle", where (a) is a view showing the air flow, and (b) is a view showing the liquid particles Diagram of the spread state.

Claims (7)

A mask for a spray nozzle is a mask for a spray nozzle for spraying a liquid into a mist. Its characteristics are: A cylindrical mask body covering at least the periphery of the spray nozzle of the spray nozzle, and a blade standing up from the outer surface of the mask body toward the outside of the mask body, The mask main body has a terminal expansion portion that maintains a long hole-shaped cross section from a base end including a mounting portion to which the spray nozzle is fixed to a front end where an opening is formed, and at least faces the long hole cross section. The diameter of the long side is expanded, A pair of the blades are provided along the long hole-shaped cross-sectional long axis of the distal end expansion portion via the mounting portion. The mask of the spray nozzle according to claim 1, wherein the outer edge of the blade is formed to slope from the front end of the mask body toward the base end more sharply than the end expansion portion, and stands up to the outside of the mask body. . The mask of the spray nozzle according to claim 1 or claim 2, wherein the tip expansion portion is formed in a shape corresponding to a tip of a spray pattern of a liquid sprayed from the spray nozzle fixed to the mounting portion. The mask for a spray nozzle according to any one of claim 1 to claim 3, wherein the spray nozzle includes: A nozzle holder formed with a flow path extending from a base end to a front end; and A front spray plate, which is arranged on the front end side of the nozzle holder and has a slot for spraying liquid; and A nozzle cap to hold the front spray plate at the front end of the nozzle holder; and The rectifying core is disposed between the front spray plate and the nozzle holder, receives liquid from the flow path, and forms a plurality of guide flow paths guided toward the slot of the front spray plate; and The orifice plate is disposed on the base end side of the nozzle holder, and is formed with a pinhole for supplying liquid to the flow path of the nozzle holder; and The orifice core is more arranged on the base end side of the nozzle holder than the orifice plate and forms a flow path through which liquid can flow. The front spray plate is formed with a strip-shaped throttle portion protruding toward the downstream side, and the slot is formed so as to cross the strip-shaped throttle portion. In the rectifying core, a rectifying protrusion is formed so that a front end width is reduced toward the slot of the front spray plate, and a wall surface constituting the rectifying protrusion is disposed on the plurality of guide flow paths. The downstream side of the wall, The orifice plate is formed with a dome-shaped throttle portion that protrudes into a dome shape toward the downstream side, and the pinhole is formed on the top of the dome-shaped throttle portion. The mask for the spray nozzle according to claim 4, wherein the flow path of the nozzle holder is branched on the downstream side, and the front spray plate and the nozzle are arranged on the downstream side of each branched flow path. Cap, the aforementioned rectifying core. The mask for a spray nozzle according to any one of claim 1 to claim 5, wherein the tip expansion portion includes a holding portion that holds the blade in a removable manner. The mask of the spray nozzle according to any one of claim 1 to claim 6, wherein the mask body is transparent.