JP6285621B2 - Switchable fluid nozzle - Google Patents

Description

  The present invention is a fluid joint used for fire fighting or water spraying or chemical spraying, and in particular, a function capable of spraying fluid in a mist or low pressure from a nozzle head provided separately from the jet toward the axial front side; The present invention relates to a switchable fluid joint having a function of discharging a rod-like water far away.

  With regard to water discharge nozzles for firefighting that spray water, conventionally, by switching a switching valve, a direct injection water flow that has a small expansion angle and can easily reach far away, and a fan-shaped injection water flow that has a large expansion angle in the horizontal direction. The thing which can be switched and discharged as needed is disclosed (refer patent document 1).

  Specifically, this has two water flow channels that can be selectively switched, and a plurality of direct injection nozzle holes are formed at the tip of the first water flow channel, and each direct injection nozzle hole is another direct injection nozzle. The axial direction of the hole is formed so as to expand at a slight angle with respect to the hole, and a plurality of fan-shaped nozzle holes are formed at the tip of the second water flow path, and each fan-shaped nozzle hole has its axis line with respect to the other fan-shaped nozzle holes. The direction is formed in a direction that expands at an angle in the horizontal direction.

  The above-mentioned fan jet water stream sprays high-pressure water in the form of a mist to discharge water, cools the fire source with the water, covers the fire source with water vapor generated by water evaporation, and shuts off the supply of air. Extinguish fire. Fire extinguishing by spraying water spray is different from the conventional method of extinguishing fire by directly squirting rod-shaped water into the fire, and the amount of water required for extinguishing is small, and the water is released in the form of fine water droplets. Therefore, it is said that there is little impact due to direct discharge of the water discharge flow, and water loss can be greatly reduced.

JP 2001-070468 A

  Here, the water discharge work may vary depending on the situation at the site, and it is required to have various water discharge modes such as high-pressure narrow-width water discharge reaching to a distant place, diffusion water discharge to a predetermined range of low pressure, and diffusion water discharge spreading in a spray form. For example, when a fire-fighting nozzle is used, there is a case where fire extinguishing by mist water discharge for oil fire and simultaneous fire extinguishing by concentrated water discharge for normal fire may be required. However, if the nozzle ports are replaced in accordance with these water discharge modes, it takes time to replace the nozzle ports, and labor and equipment for transporting the nozzle ports for replacing the nozzle ports are also required.

  However, although the conventional fire-fighting nozzle selects and injects a direct-injection water flow and a fan-type injection water flow by switching the switching valve, the direct-injection nozzle hole that performs the direct-injection water flow expands at a slight angle. Because of the formation, local high-pressure water discharge to a distant location could not be performed. In addition, the conventional fire-fighting nozzle is merely one that selectively switches between two types of fluids using a switching valve, and cannot discharge these two types of water streams simultaneously. For this reason, the request | requirement of performing simultaneous fire extinguishing of the said mist-like water discharge and concentrated water discharge was not able to be met.

  Also, general firefighting joints adjust the amount of water discharged by rotating a switching valve that can be turned in a screw-type manner, and many of them move the switching valve to the front end or the end to close the valve body. On the contrary, the valve body becomes the maximum open state only when the switching valve is moved to the rearmost end or the frontmost end. The same applies to the conventional fire-fighting nozzle, and in such a case, the switching valve must be rotated more than half a circle from the closed state to the maximum open state, which may reduce water loss and may be new. It was difficult to deal with situations that required instantaneous switching of the water discharge pressure, such as when fire types were found.

  Therefore, the present invention can be changed to a water discharge mode according to various digestion situations while avoiding the trouble of nozzle replacement and equipment transportation, and can perform local high-pressure water discharge to a distant place. It is an object of the present invention to provide a switchable fluid nozzle capable of meeting the demand for simultaneous fire extinguishing of mist water discharge and concentrated water discharge. It is another object of the present invention to provide a switchable fluid nozzle having a switching structure that can easily cope with a situation where the water discharge pressure needs to be instantaneously switched.

In order to achieve the above object, the present invention takes the following means (1) to (4).
(1) The switchable fluid nozzle of the present invention is
A nozzle shaft 10 having a shaft hole 10H formed through the shaft center, a first nozzle piece 11 having an enlarged diameter fixed at the tip of the nozzle shaft 10, and a second nozzle piece 12 having an enlarged diameter fixed near the tip of the nozzle shaft 10. The base shaft holding arm 13 projecting outward from the peripheral portion of the nozzle shaft 10 in the axial direction rearward of the second nozzle piece 12, and the outer end of the base body holding arm 13 is fixed to the inner surface of the cylinder so that the nozzle shaft 10 is in the cylinder. A nozzle base 1 comprising a base frame 14 inserted and held through a space;
An outer frame 21 that is externally fitted to the front side of the nozzle base 1 with the cylindrical tip as a jet outlet 20, and a closing front plate 22 that projects from the inside of the outer frame 21 to the axial center side. Comprising
Depending on the axial position of the outer frame 21 with respect to the nozzle base 1, the pair of the pre-blocking plate 22 and the first nozzle piece 11 and the pair of the pre-blocking plate 22 and the second nozzle piece 12 are selected to be in contact with each other, or the sets are not in contact with each other. A front frame 2 that can be in a state;
An inner frame 31 fitted into the rear side of the nozzle base 1 so as to be axially movable with the cylindrical base end as a connection port 30;
A frame holding arm 32 projecting from the inside of the inner frame 31 toward the axial center,
A closed plate 33 centrally fixed to the axial front portion of the inner frame 31 by the frame holding arm 32 ;
The fluid nozzle includes a rear frame body 3 that can bring the closed plate 33 and the axial hole rear end 10E of the nozzle shaft 10 into contact or non-contact depending on the axial position of the inner frame 20 with respect to the nozzle base 1. And
By switching the contact state / non-contact state of each set of the pre-blocking plate 22 and the first nozzle piece 11 and the pre-blocking plate 22 and the second nozzle piece 12 according to the axial positional relationship between the nozzle base 1 and the front frame body 2. The fluid ejection from the periphery of the ejection port 20 can be adjusted, and
Fluid ejection from the shaft hole 10H of the nozzle shaft 20 by switching the contact state / non-contact state between the closed plate 33 and the shaft hole rear end 10E according to the axial positional relationship between the nozzle base 1 and the rear frame 3 Can be adjusted.
(2) In the switchable fluid nozzle, it is preferable that a rectifier 15 having a plurality of arrow blade pieces 15P is accommodated in the shaft hole 10H.
(3) In any one of the switchable fluid nozzles described above, it is preferable that a central protrusion plate 34 having a front protrusion at the center of the shaft is provided in the center of the front surface of the rear frame 33.
(4) In any one of the switchable fluid nozzles described above, it is preferable that one of the first nozzle piece 11 and the second nozzle piece 12 is detachably fixed from the nozzle shaft.

  According to the above configuration, the joint main body that can be interposed in the hose or the fluid nozzle allows the fluid to be ejected from the hose tip side or the fluid nozzle toward the cylinder axial direction side of the joint, while being diagonally opposite to the axial direction from the nozzle head. The fluid can be ejected laterally. By retrofitting into an existing hose or fluid nozzle, more types of jetting can be performed, and jetting can be performed while adjusting a predetermined amount toward the side of the lick by the jetting adjustment mechanism. Moreover, it is possible to spray water only from the nozzle head without sending the fluid to the axial front side by connecting the nozzle which can close the front side of the joint with a plug or can be closed. For example, in horticulture and plant cultivation including lawn maintenance work, the minimum amount of water or chemicals can be sprayed from the nozzle head in the form of a mist.

  The switchable fluid nozzle of the present invention employs the above-described means, and internally forms two fluid flow paths in the diffusion direction and the axial direction, and adjusts the double switch handle corresponding to each fluid flow path to adjust the nozzle opening. It is possible to easily switch to a water discharge mode according to various digestion situations without exchanging water, and to perform local high-pressure water discharge to a distant place, and simultaneously extinguish the above-mentioned mist water discharge and concentrated water discharge. It became possible to provide a switchable fluid nozzle capable of meeting the demand to do so. Furthermore, the present invention provides a switchable fluid nozzle having a switching structure that can easily cope with a situation where the water discharge pressure needs to be switched instantaneously.

FIG. 3 is an exploded perspective view of the switchable fluid nozzle according to the first embodiment. The axial cross-section explanatory drawing in the 1st (center obstruction | occlusion and back part obstruction | occlusion) state of the switching type fluid nozzle of Example 1. FIG. The axial cross-section explanatory drawing in the 2nd (center obstruction | occlusion and peripheral part maximum release) state of the switching-type fluid nozzle of Example 1. FIG. The axial cross-section explanatory drawing in the 3rd (center obstruction | occlusion and peripheral part obstruction | occlusion) state of the switching type fluid nozzle of Example 1. FIG. The axial cross-section explanatory drawing in the 4th (center opening | releasing and back part periphery obstruction | occlusion) state of the switching type fluid nozzle of Example 1. FIG. The axial cross-section explanatory drawing in the 6th (center open | release and front part periphery obstruction | occlusion) state of the switching type fluid nozzle of Example 1. FIG. The axial cross-section explanatory drawing in the 1st (center obstruction | occlusion / back part obstruction | occlusion) state of the switching type fluid nozzle of Example 2. FIG. The axial cross-section explanatory drawing in the 2nd (center obstruction | occlusion and peripheral part maximum release) state of the switching-type fluid nozzle of Example 2. FIG. The axial cross-section explanatory drawing in the 3rd (center obstruction | occlusion / front part periphery obstruction | occlusion) state of the switching type fluid nozzle of Example 2. FIG. The axial cross-section explanatory drawing in the 4th (center open | release and peripheral part obstruction | occlusion) state of the switching type fluid nozzle of Example 2. FIG. The axial cross-section explanatory drawing in the 6th (center open | release and peripheral part front obstruction | occlusion) state of the switching-type fluid nozzle of Example 2. FIG. The perspective view which shows the rectifier incorporated in the axis | shaft of the switching type fluid nozzle of Example 2. FIG.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments for carrying out the present invention will be described below with reference to the drawings shown as examples. FIGS. 1 to 3b are switching type fluid nozzles of the first embodiment, FIGS. 4a to 5b are switching type fluid nozzles of the second embodiment, and FIG. 6 is a rectifier used in the second embodiment.

[Basic configuration] The switchable fluid nozzle of the example is basically
A nozzle shaft 10 having a shaft hole 10H formed through the shaft center, a first nozzle piece 11 having an enlarged diameter fixed at the tip of the nozzle shaft 10, and a second nozzle piece 12 having an enlarged diameter fixed near the tip of the nozzle shaft 10. The base shaft holding arm 13 projecting outward from the peripheral portion of the nozzle shaft 10 in the axial direction rearward of the second nozzle piece 12, and the outer end of the base body holding arm 13 is fixed to the inner surface of the cylinder so that the nozzle shaft 10 is in the cylinder. A nozzle base 1 comprising a base frame 14 inserted and held through a space;
An outer frame 21 that is externally fitted to the front side of the nozzle base 1 with the cylindrical tip as a jet outlet 20, and a closing front plate 22 that projects from the inside of the outer frame 21 to the axial center side. Comprising
Depending on the axial position of the outer frame 21 with respect to the nozzle base 1, the pair of the pre-blocking plate 22 and the first nozzle piece 11 and the pair of the pre-blocking plate 22 and the second nozzle piece 12 are selected to be in contact with each other, or the sets are not in contact with each other. A front frame 2 that can be in a state;
An inner frame 31 fitted into the rear side of the nozzle base 1 so as to be axially movable with the cylindrical base end as a connection port 30;
A frame holding arm 32 projecting from the inside of the inner frame 31 toward the axial center,
A closed rear plate 33 centrally fixed to the front portion in the axial direction of the inner frame 31 by the holding arm,
The fluid nozzle includes a rear frame body 3 that can bring the closed plate 33 and the axial hole rear end 10E of the nozzle shaft 10 into contact or non-contact depending on the axial position of the inner frame 20 with respect to the nozzle base 1. And
By switching the contact state / non-contact state of each set of the pre-blocking plate 22 and the first nozzle piece 11 and the pre-blocking plate 22 and the second nozzle piece 12 according to the axial positional relationship between the nozzle base 1 and the front frame body 2. The fluid ejection from the periphery of the ejection port 20 can be adjusted, and the contact state between the closed plate 33 and the shaft hole rear end 10E / according to the axial positional relationship between the nozzle base 1 and the rear frame 3 / By switching the non-contact state, fluid ejection from the shaft hole 10H of the nozzle shaft 20 can be adjusted.

(Rectifier 15) It is preferable that a rectifier 15 having a plurality of arrow blade pieces 15P is accommodated in the shaft hole 10H. The rectifying body 15 of the embodiment is composed of two assembled plates of four blades assembled in a cross shape in a cross section orthogonal to the axis. Each assembled plate is composed of a trapezoidal arrow blade piece 151 having a single inclined side projecting toward one end side in the axial direction, and the other end side is from a rectangular portion 152 having an axial orthogonal side as an end portion having a square notch at the outer corner. Become. The two rectifiers 15 are combined so that the tip protrusions 153 of the respective arrow blade pieces 151 are in axial reciprocal contact with each other and the axes perpendicular to each other come into contact with each other. By combining two cruciform rectifying plates on the same axis, it is possible to expect a rectifying effect equivalent to eight cross-sectional views.
(Center protrusion 34) A center protrusion 34 having a front protrusion at the center of the shaft is provided at the center of the front surface of the rear frame 33.
(First Nozurukoma, second Nozurukoma) first Nozurukoma, that either the second Nozurukoma is removably secured from the nozzle axis preferred.

(how to use)
In the first, second, and third states, a rod-shaped high-pressure fluid is ejected from the shaft by closing the central flow path. Among these, the first state and the third state are states where the first flow path of the shaft peripheral portion is closed, and the second state is a state where the first flow passage of the shaft peripheral portion is most released. Specifically, the rear frame body 3 is screwed forward with respect to the front frame body 2, and the closed rear frame is pressure-bonded to the rear end of the nozzle shaft to form a second flow path closed state in the shaft. . In addition, the first state is such that the nozzle base 1 is screwed rearward with respect to the front frame body 2 and the second nozzle piece 12 at the rear of the nozzle shaft is pressed against the rear surface of the front closing plate 22 of the front frame body, It is the state which obstruct | occluded the 1st flow path of the circumference part. The third state is
The nozzle base 1 is screwed forward with respect to the front frame body 2, and the first nozzle piece 11 at the front part of the nozzle shaft is pressed against the front surface of the closing front plate 22 of the front frame body, so The road is blocked. The first state and the third state are both closed, but the state differs depending on whether the first state or the third state is located at the front end or the rear end, and the subsequent movable direction of the shaft body is different.

  In the second state, the nozzle shaft is in a position intermediate between the first state and the second state, and the first flow path is in the maximum open state.

  In the fourth, fifth, and sixth states, the bar-shaped high-pressure fluid is ejected from the shaft by releasing the central flow path. Among these, the fourth state and the sixth state are states where the first flow path of the shaft peripheral portion is closed, and the second state is a state where the first flow passage of the shaft peripheral portion is most released. (Of which only the fifth state is omitted). Specifically, the rear frame body 3 is screwed backward with respect to the front frame body 2 so that the closed rear top is separated from the rear end of the nozzle shaft. .

  Although the switchable fluid nozzle of the second embodiment is common in the basic operation and configuration to the first embodiment, the configuration of the nozzle shaft, the configuration of the closed rear frame of the rear frame 2, and the configuration of the current plate are different. .

  As shown in FIG. 6, in the rectifying body 15 of the second embodiment, a large number of rectangular protruding pieces 155 are arranged on the inner surface of the cylindrical plate 154 along the axial direction. After securing the flow rate at the center of the shaft, it is possible to expect a rectifying effect equivalent to eight sheets in a sectional view.

  Others The present invention is not limited to the above-described embodiments, but various arrangement changes, integral-separated configuration changes, arrangements of the number of heads and head angles, and orientation changes without departing from the spirit of the invention. In addition, it is possible to change the jet outlet and the internal flow structure of the jet head, the formation direction or number of the fluid flow paths, the arrangement of the blocking plates, the adjustment method, and the like.

Nozzle base 1
Shaft hole 10H
Shaft rear end 10B
Front shaft end 10F
Nozzle shaft 10
First nozzle piece 11
Second nozzle piece 12
Substrate holding arm 13
In-cylinder space 1H
Base frame 14
Rectifier 15
Arrow feather piece 151
Square part 152
Tip protrusion 153
Base handle 16
Front frame 2
Spout 20
Outer frame 21
Pre-occlusion plate 22
Expanded end 23
Rectification rib 24
In-cylinder plate 25
S1 first contact state S2 second contact state S3 non-contact state rear frame 3
Connection port 30
Inner frame 31
Frame rear part 31B
Inner screw 31S
Frame holding arm 32
Post-blocking top 33
Blocking plate 33F
Central protrusion 34
Shaft hole rear end 10E

Claims (4)

A nozzle shaft in which a shaft hole is formed through the shaft center, a first nozzle piece having an enlarged diameter fixed at the tip of the nozzle shaft, a second nozzle piece having an enlarged diameter fixed in the vicinity of the nozzle shaft tip, and a shaft from the second nozzle piece Nozzle comprising a base holding arm that protrudes outward from the periphery of the nozzle shaft in the rear direction, and a base frame that inserts and holds the nozzle shaft by fixing the outer end of the base holding arm to the inner surface of the cylinder A base body, an outer frame externally fitted to the front side of the nozzle base body with a cylindrical tip as a jet outlet, and a closed front plate formed to project from the frame of the outer frame to the axial center side And
Depending on the axial position of the outer frame with respect to the nozzle base, the front frame and the first nozzle piece, the front block and the second nozzle piece can be selected to be in contact with each other, or the front frame can be in non-contact with each set. An inner frame that is fitted into the rear side of the nozzle base so as to be axially movable with the cylindrical base end as a connection port, a frame holding arm that protrudes from the inside of the inner frame toward the axial center, and the frame A rear frame fixed at the center in the axial front of the inner frame by a holding arm ;
A fluid nozzle composed of a rear frame body capable of bringing the rear frame and the rear end of the shaft hole of the nozzle shaft into contact or non-contact depending on the axial position of the inner frame with respect to the nozzle base,
By switching the contact state / non-contact state of each set of the front plate and the first nozzle piece, the front plate and the second nozzle piece according to the axial positional relationship between the nozzle base body and the front frame body, The nozzle of the nozzle shaft can be adjusted by switching the contact state / non-contact state between the rear frame and the rear end of the shaft hole according to the axial positional relationship between the nozzle base body and the rear frame body. A switchable fluid nozzle characterized in that fluid ejection from a hole can be adjusted.   The switchable fluid nozzle according to claim 1, wherein a rectifier body having a plurality of arrow blade pieces is accommodated in the shaft hole.   The switchable fluid nozzle according to claim 1 or 2, wherein a central projecting plate having a front projection at the center of the shaft is provided at the center of the front surface of the rear frame. 4. The switchable fluid nozzle according to claim 1, wherein either the first nozzle piece or the second nozzle piece is detachably fixed from the nozzle shaft.

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