JPH0528445U - Water injection hole adjustment type spray nozzle - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a spray nozzle for increasing / decreasing water injection holes, which has a good mixing property between a material and an additive even when the amount of the material supplied is reduced and the amount of water as an additive is reduced. [Structure] A large number of small holes 1 penetrating inside are formed in an intermediate portion of a nozzle pipe 12 to which a material pneumatically transported is supplied.
5, an injection part 11 is formed, and a jacket 13 that is movable around the injection part 11 in the axial direction of the nozzle pipe 12.
Is provided, and the injection amount is adjusted by moving the jacket 13.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a spray nozzle for adjusting a water injection hole used for spray repair work of a kiln or the like.

[0002]

[Prior Art]

 FIG. 4 shows a conventional spray nozzle 50. As shown in the figure, a water injection hole 52 is formed in the circumference of a nozzle pipe 51, the outer side of which is covered with a donut-shaped jacket 53, and the flow rate adjustment is performed in this jacket 53. An additive such as water is injected through the valve 54 and mixed with the material that is pneumatically transported through the material hose 55, and the mixed material is blown out from the tip of the nozzle pipe 51 to perform a spraying operation. Was there.

[0003]

[Problems to be solved by the device]

 However, since the diameter and the number of the water injection holes 52 are set so as to ensure the water injection amount that can correspond to the maximum amount of material transported by air, when the flow rate adjusting valve 54 is narrowed, If the water jet from the water injection hole 52 is weak and the water pressure in the water injection hole 52 is low even if the flow rate adjusting valve 54 is fully opened, the water flows along the inner wall of the nozzle pipe 51 and is conveyed. The additive did not mix well with the material. For this reason, there is a problem that not only a lot of dust is generated and the working environment is bad, but also the construction body is adversely affected. In addition, in the conventional spray nozzle 50, the diameter of the water injection hole 52 is about 2 mm, and the particle size of the water added by this is large, so the contact with the material to be conveyed is not sufficient, and the material conveyed by this There was also a problem that the mixing of water added from the middle was bad. The present invention has been made in view of such circumstances, and provides a water injection hole increase / decrease adjustment type spray nozzle with which mixing of material and additive is good even if the supply of material is reduced and water as additive is reduced. The purpose is to do.

[0004]

[Means for Solving the Problems]

 In accordance with the above-mentioned object, the water injection hole increasing / decreasing adjustment type spray nozzle according to claim 1 is provided with a water supply section consisting of a large number of small holes penetrating inward at an intermediate portion of a nozzle pipe into which the material which has been pneumatically transported is supplied. The jacket is formed around the water supply part and is provided with an axially movable jacket, and the injection amount is adjusted by the movement of the jacket.

[0005]

[Action]

 In the water injection hole increasing / decreasing adjustment type spray nozzle according to claim 1, a water supply portion including a plurality of water injection holes penetrating inward is formed at an intermediate portion of the nozzle pipe, and the water supply portion may be provided around the water supply portion. Since a jacket that is movable in the axial direction is provided on the inside, by moving the jacket, the number of small holes in the water supply section covered by the jacket is increased or decreased, thereby adjusting the flow rate of the additive. .. In this case, the pressure in the jacket can be kept substantially constant even if the amount of the additive supplied from the water supply section changes, so the force of the additive blown out from each small hole is constant. Therefore, even if the amount of the additive is reduced, it can be mixed with the material without any trouble.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. Here, FIG. 1 is a sectional view of a spray nozzle for adjusting a water injection hole according to an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a front view thereof.

As shown in FIG. 1, a water injection hole increasing / decreasing adjustable spray nozzle 10 according to an embodiment of the present invention comprises a nozzle pipe 12 having a water supply portion 11 formed in an intermediate portion thereof, and the water supply of the nozzle pipe 12 1. It has a jacket 13 that covers the portion 11 and a lever 14 that moves the jacket 13 in the axial direction. These will be described in detail below.

In this embodiment, the nozzle pipe 12 is made of a stainless steel pipe having an outer diameter of about 30 to 60 mm, and a small hole 15 is formed in the middle portion to form a large number of water injection holes penetrating the inside of the pipe. A water supply unit 11 is formed. The small holes 15 are formed of through holes having a diameter of 0.4 to 0.1 mm (preferably 0.2 mm), and are formed at intervals of 8 to 10 mm on 3 to 5 spirals having a spiral pitch of about 10 mm. ing . Threads 16 and 17 are formed on both sides of the nozzle pipe 12, and a coupling fitting 18 for connecting a hose for pneumatically transporting a material can be screwed on one end and a nozzle pipe (not shown) extending on the other end can be screwed. It is like this.

A tubular jacket 13 is provided so as to cover the water supply portion 11. An O-ring groove is formed in the jacket 13, and O-rings 20 and 21 for sealing are fitted therein. ing. Further, an O-ring 22 for sealing is also provided on the base end side of the jacket 13, and slide pins (bolts are used in this embodiment) 23, 24 are provided on both sides thereof. Has been. Further, the jacket 13 is provided with a water injection port 25 for injecting water, which is an example of an additive, but the water injection port 25 is provided with a filter 26 for removing dust and the like, and the filter 26 is replaced. A cap 28 provided with a female screw 27 into which a connecting fitting (not shown) can be screwed is provided so that an O-ring 29 for water sealing is provided between the water inlet 25 and the cap 28. There is.

On the other hand, on the nozzle pipe 12, a fixing metal fitting 34 having arms 31 and 32 for pivotally fixing the lever 14 with a pin 30 is rotatably mounted. It is attached by 35 and 36. The lower part of the lever 14 is divided into left and right parts, and long holes 37 are formed at the tips of the parts. The slide pins 23 and 24 are fitted into the lever 14, and the lever 14 is tilted back and forth to move the jacket 13 into place. The nozzle pipe 12 can be slidably moved in the axial direction.

Therefore, when a material supply hose is connected to the connecting fitting 18 and high-pressure water having a pressure of about 10 to 100 kg / cm ² is connected to the water inlet 25, the material is pneumatically transported, but the nozzle pipe 12 At the position of the water supply section 11, the water jetted from the small holes 15 around the water is mixed with the material, and the mixture is jetted from a nozzle pipe (not shown) connected to the tip. In this case, since the water ejected from the small holes 15 is in the form of extremely fine lines or particles, the contact area with the material dramatically expands as compared with the conventional water particles, and the additive The miscibility of some water with the material is increased. Here, when the lever 14 is gradually retracted, the position of the water supply part 11 is also gradually retracted, and only the rear small hole 15 is ejected into the nozzle pipe 12, so that the ejected water is ejected. The amount will decrease. Even in this case, the pressure of the water in the water supply unit 11 does not change, so that the ejection speed of water from each small hole 15 becomes substantially constant, and the water is smoothly mixed into the material.

In the above embodiment, the jacket is moved by the lever, but it is also possible to provide a feed screw on the jacket and move it back and forth by the screw. Although water is used as an additive in the above-mentioned embodiment, the present invention can be applied to the case of mixing other fluid in water or the case of using other fluid instead of water.

[0013]

[Effect of the device]

 As is clear from the above description, the water injection hole adjusting type spray nozzle according to claim 1 adjusts the amount of water to be ejected by moving the jacket in the axial direction of the nozzle pipe. Water can be supplied to the inside of the nozzle pipe without weakening the momentum, which improves the mixing of water and material and reduces dust generation. This improves the working environment. In addition, since the water and the material are mixed well, it is possible to improve the quality of the construction body without unevenness in quality.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a water injection hole adjusting / adjusting type spray nozzle according to an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a front view of the same.

FIG. 4 is a partially cutaway sectional view of a spray nozzle according to a conventional example.

[Explanation of symbols]

 10 Water Injection Hole Increase / Decrease Adjustable Spray Nozzle 11 Water Supply Section 12 Nozzle Pipe 13 Jacket 14 Lever 15 Small Hole 16 Screw 17 Screw 18 Connecting Metal Fitting 20 O Ring 21 O Ring 22 O Ring 23 Slide Pin 24 Slide Pin 25 Water Injection Port 26 Filter 27 Female Screw 28 Cap 29 O-ring 30 Pin 31 Arm 32 Arm 33 Holding Metal Fitting 34 Fixing Metal Fitting 35 Screw 36 Screw 37 Long Hole

Claims (1)

[Scope of utility model registration request] 1. A water supply section comprising a large number of small holes penetrating inwardly is formed in an intermediate section of a nozzle pipe into which a material pneumatically transported is supplied, and is movable in the axial direction around the water supply section. A spray nozzle for adjusting the amount of water injection holes, characterized in that a different jacket is provided and the injection amount is adjusted by moving the jacket.