JPH0233889Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to a material spray nozzle used in a spraying method for concrete, cement mortar, etc.

(Prior Art) Material spray nozzles used in concrete and mortar spraying methods have a spout for a quick-setting agent to rapidly bond cement. Since the outlet has a smaller diameter than the outlet passage for the main material such as concrete or cement mortar, it is easily clogged by concrete or quick-setting agent.

However, in the conventional nozzle, the nozzle cannot be cleaned, so when the nozzle becomes clogged, the nozzle itself has to be replaced.

(Objective of the invention) An object of the present invention is to provide a material spray nozzle that can easily clean the small-diameter jet nozzle even if it becomes clogged.

(Structure of the invention) The nozzle of the invention is a material spraying nozzle including an annular body having a passage hole through which the spraying material passes, and a ring coupled to one end of the body in the axial direction, The main body includes a cylindrical part extending in the axial direction from an outer circumference at one end and defining a recess for receiving the ring together with the main body, a female thread formed on an inner circumferential surface of the cylindrical part, and the passage hole of the main body. a first groove that extends in the circumferential direction at a position outside of the main body and opens toward the recess; and a first groove that extends from the outer peripheral surface of the main body toward the through hole and communicates with the first groove. and a second supply hole that reaches the recess from the outer periphery of the female threaded portion, and the ring has a plurality of ejection holes passing through the ring in a radial direction, and a plurality of ejection holes and a through hole that communicates with the first groove; a male thread that is threadedly engaged with the female thread;
and a flange that abuts the end surface of the cylindrical portion,
A second groove is provided in at least one of the inner circumferential surface of the cylindrical portion and the outer circumferential surface of the ring, and the second groove communicates with the second supply hole and the ejection hole.

(Effect of the invention) According to the invention, when the nozzle body and the ring are disassembled, the first and second grooves are exposed, so that the first and second grooves and the first and second supply ports are separated. Also, the nozzle can be easily cleaned with an elongated member such as a needle, so even if the nozzle becomes clogged, the nozzle can be cleaned and reused.

(Example) The embodiments shown in the drawings will be described below.

The nozzle 10 shown in FIGS. 1 and 2 includes an annular main body 12, a ring 16 coupled to one end of the main body in the direction of the axis 14, and a cylindrical body 18 coupled to the other end of the main body 12. including.

The main body 12 has a circular shape with a thickness dimension larger than that of the ring 16, and also includes a cylindrical portion 20.
The cylindrical portion 20 extends in the direction of the axis 14 from the outer periphery of one end of the body 12 in the axial direction, and defines a recess 22 in which the ring 16 is received together with the body 12 .

The main body 12 includes a passage hole 24 through which the main material for spraying passes, an annular first groove 26 that opens toward the recess 22, and a first closed end that communicates with the first groove 26. A supply hole 28 is formed. The passage hole 24 penetrates through the center of the main body 12 in the thickness direction along the axis 14, the first groove 26 extends in the circumferential direction at a position outside the passage hole 24, and the first supply port 28 penetrates through the center of the main body 12 in the thickness direction. It extends from the outer peripheral surface of 12 toward the passage hole 24 .

The main body 12 has a female thread 30 on the side opposite to the recess 22 to be screwed into the cylindrical body 18 . The inner diameter of the female thread 30 is larger than that of the passage hole 24, but the inner diameter of the cylindrical body 18 is the same as the inner diameter of the passage hole 24.

The cylindrical portion 20 has an annular second groove 32 that opens toward the recess 22 on its inner peripheral surface, and a second groove that reaches the recess 22 from the outer peripheral surface of the cylindrical portion 20 through the second groove 32.
A supply hole 34 and a female thread 36 are formed.

The ring 16 has a male thread 38 on its outer periphery;
The male thread is screwed into the female thread 36 of the main body 12, thereby coupling it to the main body 12. ring 16
has a flange 40 abutting the tip end surface of the cylindrical portion 20 on the outer periphery of one end in the thickness direction, and an annular auxiliary groove 42 that faces and communicates with the second groove 34 on the outer periphery of the other end. have

The ring 16 includes a passage hole 44 through which the main material for spraying passes, a plurality of ejection holes 46, a plurality of communication holes 48 communicating with the ejection holes, and a female thread 52 for receiving the end of the hose 50. have Passing hole 44
When the ring 16 is coupled to the body 12,
It coincides with the passage hole 24 of the main body 12. Each spout 46
are formed at predetermined intervals in the circumferential direction of the ring 16, and extend in the radial direction of the ring 16 to form auxiliary grooves 42.
and the passage hole 44 are communicated with each other. The communication hole 48 is formed from the end surface of the ring 16 opposite to the flange 40 toward the ejection hole 46, and communicates with the first groove 26 when the ring 16 is coupled to the main body 12. The groove 26 of No. 1 and the ejection hole 46 are communicated with each other.

O-rings 54, 56, 58, and 60 are provided between the main body 12 and the cylindrical body 18 and between the main body 12 and the ring 16 to maintain watertightness therebetween.

A cap 62 communicating with the first supply hole 28 and a cap 64 communicating with the second supply hole 34 are welded to the outer circumference of the main body 12 . A hose for supplying high-pressure air to the first supply hole 28 is connected to the base 62, and a hose for supplying the quick-setting agent to the second supply hole 34 is connected to the base 64.
A hose is connected to supply the

The nozzle 10 is assembled by coupling the ring 16 to the main body 12 by threading the male thread 38 of the ring 16 onto the female thread 36 of the main body 12, and by unscrewing the female thread 36 and the male thread 38, the ring 16 is coupled to the main body 12. It can be decomposed from

When the ring 16 is coupled to the main body 12, the opening portions of the first and second grooves 26, 32 are closed by the ring 16, creating an annular fluid passage extending circumferentially outside the passage holes 24, 44. The first groove 26 is connected to the ejection hole 46 through a communication hole 48 . Therefore, the high-pressure air supplied to the first supply hole 28 is jetted from the first groove 26 through the communication hole 48 and the jet hole 46 to the passage hole 44, and the high-pressure air supplied to the second supply hole 34 is The binder is ejected from the second groove 32 and the auxiliary groove 42 through the ejection hole 46 and into the passage hole 44 . Thereby, the high-pressure air and quick-setting agent are ejected from the cylinder 18 together with the main material supplied from the hose 50 toward the wall surface to be lined.

When the ring 16 is separated from the main body 12, the first and second grooves 26, 32 as well as the auxiliary groove 42 are exposed. Therefore, the first and second grooves 26, 3
2. Even if any of the auxiliary grooves 42, the ejection holes 46, and the communication holes 48 become clogged, the clogged material can be easily removed with a thin material such as a needle.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of the nozzle of the present invention, and FIG. 2 is a sectional view taken along the line - in FIG. 12: Main body, 14: Axis line, 16: Ring, 1
8: Cylindrical body, 20: Cylindrical part, 22: Recess, 24, 4
4: Passing hole, 26: First groove, 28: First supply hole, 32: Second groove, 34: Second supply hole, 3
6: Female thread, 38: Male thread, 40: Flange, 4
2: Auxiliary groove, 46: Spout hole, 48: Communication hole.

Claims (1)

[Claims for Utility Model Registration] (1) A material spraying nozzle comprising an annular body having a passage hole through which a spraying material passes, and a ring coupled to one end of the body in the axial direction, the material spraying nozzle comprising: The main body includes a cylindrical part extending in the axial direction from an outer circumference at one end and defining a recess for receiving the ring together with the main body, a female thread formed on an inner circumferential surface of the cylindrical part, and the passage hole of the main body. a first groove that extends in the circumferential direction at a position outside of the main body and opens toward the recess; and a first groove that extends from the outer peripheral surface of the main body toward the through hole and communicates with the first groove. and a second supply hole that reaches the recess from the outer periphery of the female threaded portion, and the ring has a plurality of ejection holes passing through the ring in a radial direction, and a plurality of ejection holes and 1st
a through hole that communicates with the groove of the ring, a male thread that engages with the female thread, and a flange that abuts the end surface of the cylindrical part, and a flange that contacts the end face of the cylindrical part and at least one of the inner peripheral surface of the cylindrical part and the outer peripheral surface of the ring. Said second
A material spray nozzle having a second groove communicating with a supply hole and a spout hole. (2) The material spraying nozzle according to claim 1, wherein the nozzle body has a recess on the side opposite to the first groove for receiving the end of the cylindrical body.