JP3619740B2 - Spray nozzle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a spray nozzle that sprays various fluids such as water, a liquid in a slurry form (chemical solution), a paint, powder (particles), gas, or a mixture of gases.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a spray nozzle that sprays water from a straight rod shape to a cone shape having an arbitrary cone angle within a predetermined cone angle range is known. It is also well known in the art to prepare several spray nozzles having different spray angles and to spray various fluids by replacing the spray nozzles according to the angle to be sprayed.
[0003]
[Problems to be solved by the invention]
When the fluid is sprayed in a conical shape with the above-mentioned known spray nozzle, the thickness of the sprayed fluid is substantially constant because there is a problem that the thickness of the center of the cone increases and the thickness decreases as the distance from the center increases. The appearance of spray nozzles that sprayed fluid into a flat fan shape with a thickness was expected. Furthermore, although a method of preparing and replacing a plurality of spray nozzles can be uniformly sprayed, a spray nozzle capable of spraying without replacing the spray nozzle body has been desired due to the problem of work efficiency.
[0004]
[Means for Solving the Problems]
The present invention has been developed to meet the above-mentioned demand, and the spray nozzle according to claim 1 has fluid supply means 15 and an elastic spray tube 23 connected in front of the fluid supply means, An elastic member 20 made of spring steel and having a U-shaped cross section provided in the periphery of the spray tube, and a front half a having a tapered outer surface 11 whose diameter is reduced in a forward direction, and a rear half of the front half a are integrated. The front end of the front half a is a vertical surface and has a U-shaped slit 13 formed in the diameter direction from the front end to the front end of the rear half b. The slit 13 forms two opposing pieces 12 and 12 separated by the slit in the front half a, and the rear half b is centered on a hole 15 as a fluid supply means whose front end opens at the rear end of the slit 13. Nozzle body 1 having through And a casing cylinder 25 fitted to the outside of the nozzle body so as to be able to move back and forth, and between the casing and the nozzle body which deforms the elastic spray tube and the elastic member inside the nozzle body by the back and forth movement of the casing cylinder. The folded end portion 20 ′ of the elastic member 20 is fixed to the rear wall of the slit 13, and the two folded elastic pieces 21 and 21 of the elastic member 20 are formed by the slit 13. It is characterized by being along the opposed surfaces of the opposed pieces 12, 12 in the front half of the separated nozzle body .
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Reference numeral 10 denotes a metal nozzle body, which includes a front half a having a tapered outer surface 11 whose diameter is reduced forward and a cylindrical rear half b extending integrally from the rear of the front half. The front end of the front half a is a vertical plane, and has a U-shaped slit 13 formed in a diametrical direction from the front end to the front end of the rear half, and is separated from the front half a by the slit 13. Two opposing pieces 12, 12 are formed. The rear half b has a front end penetrating through a hole 15 serving as a fluid supply means opened at the rear end of the slit 13.
[0006]
Reference numeral 20 denotes an elastic member having a U-shaped cross section made of, for example, spring steel, housed in the slit 13 in the front half of the nozzle body, and its folded end 20 'is fixed to the rear wall of the slit 13 with screws or the like. Yes. The two elastic pieces 21, 21 are along opposite surfaces of the opposing pieces 12, 12 in the front half of the nozzle body separated by the slit 13. The width of the elastic member 20 is approximately equal to the diameter of the vertical front end surface of the front half of the nozzle body, and the front ends of the elastic pieces 21 and 21 are located at the front ends of the opposing pieces 12 and 12. The folded end portion 20 ′ of the elastic member has an opening that allows the front end of the hole of the fluid supply means 15 provided through the center of the rear half of the nozzle body to communicate with the interior of the slit 13.
[0007]
At the front end of the hole of the fluid supply means 15, a nozzle tip 16 that protrudes shortly into the slit 13 of the nozzle body through an opening formed at the folded end of the elastic member 20 is attached. The rear end portion of the scattering tube 23 having cylindrical elasticity is fitted and fixed. The front end of the spray tube is also located on the vertical front end surface of the front half of the nozzle body.
[0008]
A casing cylinder 25 is fitted outside the nozzle body 10 so as to be able to advance and retreat in the front-rear direction, and has an inner periphery with a tapered surface 26 corresponding to the tapered outer surface 11 of the front half of the nozzle body. Therefore, when the casing cylinder 25 is finally retracted (see FIGS. 1, A ′ and B ′), the tapered surface 26 on the inner periphery of the casing cylinder 25 overlaps the tapered outer surface 11 of the front half of the nozzle body.
[0009]
The front end portions of the two opposing pieces 12, 12 separated by the slit 13 in the front half a of the nozzle body are provided with through holes in the diameter direction orthogonal to the slits, and slide cam pieces 31 are provided in the respective through holes. Is slidably supported. The opposed inner surfaces 32, 32 of the slide cam pieces 31, 31 abut against the outer surfaces of the folded elastic pieces 21, 21 of the elastic member 20 having a U-shaped cross section, and are in opposite directions due to the elasticity of the elastic pieces 21. It has been suppressed. Therefore, as shown in FIG. 1 (A), in the state where the casing cylinder 25 is most advanced with respect to the nozzle body 10, the outer surface 33 of each slide cam piece 31, 31 protrudes outward from the tapered outer surface 11 of each opposing piece, It is pressed against the rear portion of the tapered surface 26 on the inner periphery of the casing cylinder 25. The outer surface 33 of each slide cam piece 31, 31 is preferably a curved surface corresponding to the tapered surface 26 on the inner periphery of the casing cylinder.
[0010]
In order to move the casing cylinder 25 forward and backward with respect to the nozzle body 10, for example, a male screw is formed on the cylindrical outer periphery of the rear half of the nozzle body, a female screw is formed on the rear inner periphery of the casing cylinder, and the male screw and the female screw are screwed. The casing cylinder may be rotated forward and backward by hand with respect to the nozzle body by joining, but in the illustrated embodiment, an axial groove 17 is provided on the outer periphery of the rear half of the nozzle body, and the casing cylinder The inner end portion of the screw 27 screwed in the rear portion in the radial direction is engaged with the groove 17, and the casing cylinder is advanced and retracted within a range where the screw 27 contacts the front end and the rear end of the axial groove 17. .
[0011]
Therefore, for example, as shown in FIG. 2, the fluid pressure cylinder 41 is fixed by the support device 43 to the fluid supply pipe 18 connected to the rear end portion of the hole as the fluid supply means 15 of the nozzle body, and protrudes from the front end to expand and contract. The piston 42 is connected to the casing cylinder 25, and the casing cylinder is remotely advanced and retracted within a range in which the screw 27 abuts the front end and the rear end of the axial groove 17 by the advancing / retreating means 40 comprising the cylinder 41 and the piston 42. And can be stopped at an arbitrary position. Although the fluid pressure cylinder and the piston have been described with reference to FIG. 2, the present invention is not limited thereto, and the casing cylinder can be advanced and retracted using other advancing and retracting means such as a motor.
[0012]
2, the piston 42 extends from the cylinder, and the casing cylinder 25 is in the most advanced state with respect to the nozzle body. As a result, as shown in FIGS. 1A, 1B and 1C, the two elastic pieces 21 and 21 turned back of the elastic member elastically press the slide cam pieces 31 and 31 in the opposite directions, The outer surfaces 33 and 33 of 31 are pressed against the rear part of the taper surface 26 of the inner periphery of the casing cylinder 25. For this reason, the elastic pieces 21 and 21 open inside the slit 13, and the spray tube 23 is elastic and maintains a cylindrical state (see FIG. 1c). Therefore, the fluid supplied under pressure from the fluid supply pipe 18 to the spray tube 23 is determined by the diameter of the front end of the spray tube, but is preferably sprayed from the front end of the spray tube in a straight or rod shape having a diameter of about 5 to 20 mm. . Further, although it varies depending on various conditions such as the ability of a fluid supply means such as a spray tube and a spray pump, spraying at a speed of about 150 to 200 km / h is preferable because it tends to be linear or rod-shaped.
[0013]
On the other hand, for example, as shown by the broken line in FIG. 2, when the casing cylinder 25 is moved to the last retracted state by the advancing / retreating means 40, the tapered surface 26 on the inner periphery of the casing cylinder is the It overlaps outside the tapered outer surface 11. As a result, the slide cam pieces 31 and 31 are pushed radially inward by the tapered surface 26 on the inner periphery of the casing cylinder against the urging of the elastic pieces 21 of the elastic member 20, and the inner surfaces 32 of both the elastic pieces are both elastic pieces. 21 and 21 are pressed against each other inward, and the elastic spray tube 23 is deformed flat as shown in FIG. Accordingly, the fluid sprayed from the front end of the spray tube has a fan shape as shown in FIG. 1 (B ′) and becomes flat as shown in FIG. 1 (A ′). The angle α and the thickness t of the maximum sector of the sector shown in FIG. 1 (B ′) vary depending on various conditions such as the size and material of the spray tube, the ability of the fluid supply means such as the spray pump, etc. The angle α is about 100 ° and the thickness t is about 5 to 10 mm.
[0014]
Accordingly, the degree to which the spray tube 23 is flattened by the elastic pieces 21 and 21 changes according to the position at which the casing cylinder 25 is retracted from the most advanced state by the advance / retreat means 40, and the fluid sprayed from the front end of the spray tube Since the fan-shaped angle and the flat thickness can be adjusted, the retreat amount of the casing cylinder may be adjusted according to the purpose of application.
[0015]
The cross-sectional shape seen from the front of each elastic piece 21, 21 of the elastic member 20 is not a parallel straight line shape, but it is possible to make the parabola opposite to each other as shown in FIG. This is preferable because the concentration of the target object can be made uniform.
[0016]
Further, the through hole serving as the fluid supply means 15 established at the center of the rear half b of the nozzle body has a rear portion 15b having a larger diameter than the front end portion 15a, and a step portion 15 'at the boundary between the front end portion 15 and the rear portion 15b. If the cross-sectional shape of the parabola is used, turbulent flow generation can be prevented, so that the directivity when the casing cylinder is sprayed linearly in the most advanced state is preferable.
[0017]
The casing cylinder 25 is provided with an inlet 28 for cleaning liquid, and water and cleaning chemicals are injected from the casing to clean the inner surface of the casing cylinder and the outer surface of the nozzle body. Prevents the nozzle body from sticking. The washing waste water is discharged from the front end of the casing cylinder.
[0018]
In order to improve the cleaning effect and to smoothly slide the slide cam pieces 31, 31, the slide holes of the slide cam pieces provided at the front end portions of the opposed pieces 12, 12 in the front half of the nozzle body are It is preferable to form the front end opening parts 14 and 14 narrower than the hole.
[0019]
【The invention's effect】
According to the present invention, various fluids can be sprayed from a straight rod-shaped water spray into a flat fan shape instead of a conical shape, and the thickness of the sprayed amount can be kept substantially constant within a predetermined sector angle range. Can do. Therefore, in addition to spray nozzles attached to the tip of watering hoses for household use and spray nozzles for agricultural chemicals, spray nozzles suitable for various fluid spray nozzles, especially slurry spraying agents for soil covering replacement at waste landfills. Is obtained.
[Brief description of the drawings]
FIG. 1 is an embodiment of a spray nozzle according to the present invention, in which (A) is a vertical side view in a rod-like spray state, (B) is a cross-sectional plan view of the same, (C) is a front view of (A), ′) Is a vertical side view in a fan-like sprayed state, (B ′) is a cross-sectional plan view of the same, and (C ′) is a front view of (A ′).
FIG. 2 is a schematic explanatory view showing the spray nozzle of FIG. 1 and the advancing / retreating means of its casing cylinder.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Nozzle body a Nozzle body front half 11 Nozzle body taper outer surface 12, 12 Nozzle body facing piece 13 Nozzle body slit b Nozzle body rear half 15 Nozzle body fluid supply means 20 U-shaped elastic member 20 ' Folded end portions 21 and 21 of the U-shaped elastic member Elastic piece 23 of the U-shaped elastic member Spreading tube 25 Casing cylinder 26 Tapered surface 30 on the inner periphery of the casing cylinder Cam means 31 Slide cam piece 32 as cam means Opposite inner surface 33 of slide cam piece Outer surface 40 of slide cam piece Advance / retreat means 41 Cylinder 42 for advance / retreat means Piston for advance / retreat means

Claims (1)

It has a fluid supply means 15, and has an elastic dispersion tube 23 connected in front of the fluid supply means, and an elastic member 20 made of spring steel and having a U-shaped cross section provided around the dispersion tube , It consists of a front half a having a tapered outer surface 11 whose diameter is reduced in the forward direction and a cylindrical rear half b extending integrally from the rear of the front half a, and the front end of the front half a is a vertical surface, and from the front end The slit 13 has a U-shaped slit 13 formed in the diametrical direction to the front end of the rear half b, and the slit 13 forms two opposing pieces 12 and 12 separated by the slit in the front half a. The part b includes a nozzle body 10 having a front end penetrating through a hole 15 as a fluid supply means having an opening at the rear end of the slit 13, and a casing cylinder 25 fitted to the outside of the nozzle body so as to be movable back and forth. , Casing above It consists cam means 30. which is provided between the casing and the nozzle body for deforming the interior of the elastic scatter tube and the elastic member of the nozzle body by a back-and-forth movement of
The folded end 20 ′ of the elastic member 20 is fixed to the rear wall of the slit 13, and the two folded elastic pieces 21, 21 of the elastic member 20 are opposed to the front half of the nozzle body separated by the slit 13. A spray nozzle characterized by being along the opposing surfaces of the pieces (12, 12) .

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