JP2020120982A - Nozzle device - Google Patents

Abstract

To provide a nozzle device capable of controlling each of a water discharge angle and a water discharge amount, the control of which are effective during fire fighting and the like, by an easy operation.SOLUTION: A nozzle device 1 includes: water supply means 10 comprising a main channel for supplying water supplied from a water supply source; water discharge means 20 for performing water discharge mainly for fire extinction from a plurality of nozzle tips by adjusting a flow rate of the water supplied from the water supply means 10; and water discharge angle control means 30 for controlling a water discharge angle with respect to the center axis of the water discharge from the plurality of nozzle tips.SELECTED DRAWING: Figure 2

Description

The present invention relates to a nozzle device for discharging water, and particularly to a nozzle device for discharging water for extinguishing a fire.

Conventionally, as a nozzle device for discharging water for extinguishing a fire, there is a nozzle device capable of discharging water in the form of a water stream having a long range of spraying and spraying water to widen the angle of water discharge to widen the fire extinguishing area. Has been used. There was a problem that the water-jet type water discharge had a long range but a small fire extinguishing area, and the spray water discharge had a wide fire extinguishing area but a short range.

Therefore, as a nozzle device that has a long range of water discharge and can secure a water discharge area, a multi-mouth nozzle device provided with a plurality of injection nozzles inclined outward has been proposed. (For example, Patent Documents 1 and 2)

However, in the above-mentioned nozzle device, since the inclination angle of each injection nozzle is fixed, it is not possible to change the water discharge angle during the fire extinguishing activity to change the water discharge area according to the fire extinguishing target.

On the other hand, in Patent Document 3, a plurality of movable water discharge members are provided, and an angle adjusting device capable of changing and fixing the angle in a direction in which the movable water discharge members are opened or converged is provided. Disclosed is a water extinguishing nozzle device for extinguishing a fire, which can change an angle of a water discharging member to change a water discharging area for a fire extinguishing target.

JP, 2009-291699, A JP, 2013-252215, A JP 2012-135460 A

However, the above-described water discharge nozzle device has a problem that it is not possible to effectively control the amount of water discharge, which is important to control in fire fighting activities.

The control of the amount of water discharged is effective when the water source is a finite amount such as a tank rather than a river or a fire hydrant, and it is desirable to reduce the flow rate to secure the water discharge time or to reduce the flow rate in the latter half of the fire.

Therefore, an object of the present invention is to provide a nozzle device capable of controlling the water discharge angle and the water discharge amount with a simple operation.

In order to achieve the above object, in the invention according to claim 1, a water supply means that is connected to a water supply source and includes a main flow path for supplying water supplied from the water supply source to the water discharge means, a plurality of nozzle tips, Water discharge means for discharging water supplied from the water supply means from the nozzle tip, and a water discharge angle control means for controlling the water discharge angle of the water discharge from the plurality of nozzle tips, the water discharge means, the water discharge means A plurality of nozzle chip groups are formed by the nozzle chips selected from the nozzle chips, and a water discharge passage communicating with each nozzle chip group is provided with a first body formed to open toward the water supply means, A first operation part for operating the water discharge means by rotation and a second operation part for operating the water discharge angle control means by rotation are arranged in the axial direction of the central axis of the water supply means, respectively. Is configured to be independently rotatable about the central axis, and the first body is rotated by rotating the first operating portion around the central axis, and By selecting a nozzle tip group that communicates with the main flow path, the flow rate of water supplied to the water discharge means can be adjusted, and the water discharge angle can be adjusted by rotating the second operation portion around the central axis. The technical means of being controllable is used. Here, the axial direction of the “center axis” is the same as the water discharge direction when the water discharge angle is 0°.

According to a second aspect of the present invention, in the nozzle device according to the first aspect, the water supply means is connected to the water supply source and forms a main channel of the water supply, and an end of the water supply member on the injection side. A second body that is connected to the main passage and has a water supply passage that is in communication with the main passage and that supplies water corresponding to each of the nozzle tip groups, and the water discharge means includes the first body. A transmission member, which is formed in a tubular shape having one end connected to one end as an operation portion, is configured to be rotatable about the central axis, and is provided to cover the water supply means. A rotation member for locking the other end of the transmission member to rotate the transmission member, wherein the water supply means and the water discharge means rotate the transmission member by the rotation member. The discharge flow communicating with the water supply passage is configured so that the water supply side surface of the first body is fluid-tightly slidable with respect to the emission side surface of the second body and is rotatable. A technical means is used in which a nozzle chip group communicating with the main channel can be selected by selecting a channel.

According to a third aspect of the invention, in the nozzle device according to the second aspect, the rotation member is not rotatable with respect to the transmission member while being locked to the other end of the transmission member in the rotation direction. It is mounted so that it can be moved forward to the injection side of the central axis or retracted to the water supply side, and in order to select a desired nozzle tip group that communicates with the main flow path, the forward and backward movement and rotation of the rotating member are performed. The technical means that a positioning part for positioning the operation in combination with the motion is provided is used.

According to a fourth aspect of the present invention, in the nozzle device according to any one of the first to third aspects, the plurality of nozzle tip groups have the plurality of nozzle tips arranged concentrically, and have the same configuration. The technical means is used that the nozzle chips are respectively formed on concentric circles.

According to a fifth aspect of the invention, in the nozzle device according to any one of the first to fourth aspects, the rotation of the water discharge angle control means by the second operating portion is transmitted to each nozzle tip. Thus, the technical means of controlling the inclination angle at which the flow path on the ejection side of each nozzle tip is inclined with respect to the central axis.

According to a sixth aspect of the invention, in the nozzle device according to any one of the first to fifth aspects, the water discharge angle control means changes the water discharge angle of each nozzle tip group in conjunction with each other. Use technical means.

According to a seventh aspect of the present invention, in the nozzle device according to any one of the first to sixth aspects, the second operating portion of the water discharge angle control means is provided with the transmission member incorporated therein. A rotatably provided cylindrical rotation ring, and a locking member that is provided internally of the transmission member and that rotatably locks the rotation ring with respect to the transmission member. Use technical means.

According to an eighth aspect of the invention, in the nozzle device according to the seventh aspect, the nozzle tip is provided in the water discharge member such that a flow path on the injection side is tiltable between the central axis direction and the radial outside. The technical means is used, which is provided with an inclining mechanism that transmits the rotation by the rotating ring to the nozzle tip to incline the flow path on the ejection side of the nozzle tip.

According to the invention as set forth in claim 1, the nozzle device includes the water discharge means and the water discharge angle control means which are independently rotatable, and the first operation part of the water discharge means is arranged around the central axis of the water supply means. By rotating, it is possible to select the nozzle tip group that discharges water and the nozzle tip group that does not discharge water, and by combining them, the flow rate of water supplied to the water discharge means can be adjusted to control the water discharge amount. Further, the water discharge angle can be controlled by rotating the second operation portion of the water discharge angle control means around the central axis of the water supply means. Thereby, with a simple operation, for example, it is possible to control the water discharge angle and the water discharge amount, which are effective to control in fire fighting activities, respectively. The water supply means and the water discharge means are arranged in the axial direction of the central axis, and the first operation portion of the water discharge means and the second operation portion of the water discharge angle control means are arranged outside the central axis line of the water supply means. Therefore, it is compactly constructed as a whole.

According to the second aspect of the invention, since the nozzle device includes the transmission member and the rotating member, the water discharge amount can be adjusted by rotating the transmission member by the rotating member.

According to the third aspect of the present invention, a desired nozzle tip group that surely communicates with the main channel can be selected by combining the rotating member and the positioning member.

According to the invention as set forth in claim 4, since the nozzles are arranged concentrically in the nozzle tip group, the water discharge becomes a conical surface, and the water film can be evenly spread without any hollow.

According to the fifth aspect of the present invention, by transmitting the rotation of the water discharge angle control means to each nozzle tip, the flow path on the ejection side of each nozzle tip is inclined with respect to the central axis of the water discharge means. Can be controlled to continuously change the water discharge angle of each nozzle tip.

According to the invention of claim 6, since the water discharge angle of each nozzle tip group can be changed in conjunction with each other, it is possible to obtain a more preferable water discharge form by only operating the second operation section once.

According to the seventh aspect of the invention, the water discharge angle control means includes the rotating ring and the locking member that rotatably locks the rotating ring with respect to the transmission member. Therefore, the rotating ring does not come off from the nozzle device.

According to the invention of claim 8, by rotating the rotary ring, the flow path on the ejection side of the nozzle tip can be inclined between the central axis direction and the outer side in the radial direction to control the water discharge angle. it can.

It is a perspective explanatory view of the component of a nozzle device. FIG. 1(A) is an explanatory view of the members that make up the outer appearance of the nozzle device, and FIG. 1(B) is an explanatory view of the mainly installed members. It is explanatory drawing which shows the structure of a nozzle device. 2A is a top view and FIG. 2B is a cross-sectional view taken along the line AA. It is explanatory drawing which shows the structure of a water supply member. 3(A) is a top view and FIG. 3(B) is a cross-sectional view taken along the line AA. It is explanatory drawing which shows the structure of a water supply body. 4(A) is a top view, FIG. 4(B) is a cross-section view taken along the line AA, and FIG. 4(C) is a bottom view. It is explanatory drawing which shows the structure of a nozzle tip. 5(A), (D) and (G) are side views, FIGS. 5(B), (E) and (H) are cross section views, and FIGS. 5(C), (F) and (I) are FIG. It is explanatory drawing which shows the structure of a water discharge body. 6A is a top view, FIG. 6B is a cross-sectional view taken along the line AA, and FIG. 6C is a bottom view. It is explanatory drawing which shows the structure of a transmission member. 7(A) is a top view of the main body, FIG. 7(B) is a cross-sectional view taken along the line AA, and FIG. 7(C) is a view showing the structure of the locking portion. It is explanatory drawing which shows the structure of a rotation member. FIG. 8(A) is a side view, FIG. 8(B) is a bottom view, and FIG. 8(C) is a cross-sectional view taken along the line AA. It is explanatory drawing which shows the structure of a rotating ring. 9(A) is a top view, FIG. 9(B) is a cross-sectional view taken along the line AA, and FIG. 9(C) is a bottom view. It is explanatory drawing which shows the structure of a locking member. 10(A) is a top view, FIG. 10(B) is a cross-section view taken along the line AA, and FIG. 10(C) is a bottom view. It is explanatory drawing which shows the structure of other components. 11A is a plan view of the pressing plate, FIG. 11B is a plan view of the protective plate, FIG. 11C is a cross-sectional view of the fixing ring, and FIG. 11D is a cross-sectional view of the bumper. Is. It is explanatory drawing of the control method of the water discharge amount. It is a section explanatory view showing the structure of the nozzle tip provided with the air suction hole. It is explanatory drawing which shows the structure of the water discharge angle control means in other embodiment. FIG. 14A is a cross-sectional explanatory view, and FIG. 14B is a top explanatory view.

The nozzle device of the present invention will be described with reference to FIGS. Here, in FIG. 2A, in order to facilitate understanding of the positional relationship between the nozzle tips 21, 22, 23 and the rotary ring 31, the illustration of the pressing plate 41, the protective plate 51, and the fixing ring 61 is omitted.

(Structure of nozzle device)
The nozzle device 1 adjusts the flow rate of water supplied from the water supply means 10 and a water supply means 10 having a main flow path for supplying water supplied from a water supply source, and discharges water for extinguishing fire from a plurality of nozzle tips, for example. Means 20 and water discharge angle control means 30 for controlling the water discharge angle with respect to the central axis of the water discharge from the plurality of nozzle tips are provided. The central axis of the nozzle device 1 is C in FIG. 2, and the axial direction of the central axis is the same as the water discharge direction when the water discharge angle is 0°. Here, the central axis direction in which water is ejected from the nozzle device 1 is referred to as the ejection side, and the direction in which the water is supplied to the nozzle device 1 is referred to as the water supply side.

The water supply means 10 for introducing the water supplied from the water supply source into the water discharge means 20 includes a water supply member 11 and a water supply body 12.

The water supply member 11 includes a main body portion 11a having a main flow passage 11c formed therein, and a pedestal portion 11b configured to be connectable to a water supply source and having a diameter larger than that of the main body portion 11a. The pedestal portion 11b is provided with a positioning pin 11d, which is a positioning member for positioning the rotating member 26 described later, protruding in the radial direction. Further, a thread groove 11e is formed on the outer periphery of the tip end of the main body portion 11a on the injection side, and a thread groove 11f for connecting to a water supply source is formed on the inner periphery of the pedestal portion 11b. A packing 11g is provided inside the pedestal portion 11b.

The water supply body 12 is a member for supplying water from the water supply member 11 to a water discharge body 24, which will be described later, and is attached to the tip of the water supply member 11 on the ejection side by the method described later. The outer shape of the water supply body 12 is formed as a rotating body with respect to the central axis.

A water supply chamber 12a is formed on the water supply side of the water supply body 12, and water supply holes 12c, 12d, 12e that can supply water to the water discharge body 24 from the water supply chamber 12a toward the ejection side surface 12b are formed so as to penetrate therethrough. ing.

The water supply hole 12c is formed in the central axis direction, and its outlet is circularly opened at a position communicating with a water discharge hole 24c described later.

The water supply holes 12d are formed so as to be inclined outward in the radial direction, and their outlets are circularly opened at three positions on the ejection side surface 12b at 120° intervals, and are opened at positions where water can be supplied to the water discharge holes 24d described later.

The water supply hole 12e is formed radially further outward than the water supply hole 12d, and its outlet is formed in a long hole shape elongated in the circumferential direction (rotational direction) at three locations on the injection side surface 12b at every 120°. The opening is made at a position where water can be supplied to a water discharge hole 24e described later.

On the outer peripheral portion of the water supply body 12, a locking portion 12f that can be locked to a stepped portion 25d of the transmission member 25 described later is formed. In addition, a convex portion 12g serving as a rotation center of the transmission member 25 is formed on the emission side surface 12b. The water supply body 12 is a thread groove 12h formed inside the tubular portion, and is externally fitted to the thread groove 11e of the water supply member 11 and fixed integrally.

The water discharger 20 includes a plurality of nozzle tips 21, 22, 23, a water discharge body 24 in which the nozzle tips 21 to 23 are arranged, a transmission member 25, and a rotating member 26.

In the present embodiment, in the water discharge body 24, one nozzle tip 21 is arranged at the center, three nozzle tips 22 are arranged on the inner concentric circle at equal intervals, and six nozzle tips 23 are arranged on the outer concentric circle at equal intervals. Has been done. Each nozzle chip forms a plurality of nozzle chip groups by the nozzle chips arranged on the same concentric circle. Here, three nozzle chips 22 form a nozzle chip group 22A and six nozzle chips 23 form a nozzle chip group 23A.

The nozzle tip 21 is provided with a gear portion 21b on the outer peripheral portion of a main body portion 21a having a columnar appearance, and an injection hole 21c is formed inside the main body portion 21a. The injection hole 21c is formed coaxially with the main body 11a.

The nozzle tip 22 is provided with a gear portion 22b on the outer peripheral portion of a main body portion 22a having a columnar appearance, and an injection hole 22c is formed inside the main body portion 22a. The injection hole 22c is formed to be bent, and is inclined about 4° on the water supply side and about 6° on the injection side with respect to the axial direction of the main body portion 22a.

The nozzle tip 23 is provided with a gear portion 23b on the outer peripheral portion of a main body portion 23a having a columnar appearance, and an injection hole 23c is formed inside the main body portion 23a. The injection hole 23c is formed to be bent, and is inclined about 5° on the water supply side and about 10° on the injection side with respect to the axial direction of the main body 23a.

The outer appearance of the water discharge body 24 is formed in a columnar shape, and the water supply side is formed as a sliding surface 24a with the ejection side surface 12b of the water supply body 12.

Inside the water discharge body 24, water discharge holes 24c, 24d, and 24e are formed which connect the sliding surface 24a and the emission side surface 24b and are circularly opened at the emission side surface 24b. The water discharge holes 24c, 24d, and 24e are provided with O-rings 24i so that the nozzle tips 21, 22, and 23 can be connected in a liquid-tight manner.

The water discharge hole 24c is formed in the central axis direction so that the opening of the sliding surface 24a communicates with the water supply hole 12c of the water supply body 12.

The three water discharge holes 24d are opened at three locations (24da) as a set of two holes on the sliding surface 24a, and are opened at three locations on the inner concentric circles (24db) on the emission side surface 24b. When two holes are opened on the sliding surface 24a, they merge into the exit side surface 24b to form one flow path, and the opening (24db) forms one exit. Here, it is also possible to connect the two openings 24da of the water discharge hole 24d to form a long hole shape elongated in the circumferential direction (rotational direction).

The six water discharge holes 24e are open (24ea) at three points in the sliding surface 24a in the shape of a long hole formed in the circumferential direction (rotational direction), and are branched into the ejection side surface 24b. It becomes one channel. The exit side surface 24b has openings (24eb) at six locations on the outer concentric circles. In the insertion portion 24g, three circumferential grooves 24f extending in the circumferential direction and three longitudinal grooves 24h are formed on the outer circumference at equal intervals in the circumferential direction.

The nozzle tip 21 is rotatably inserted through the water discharge hole 24c in a state where the gear portion 21b and the tip end portion 21d at one end of the main body portion 21a protrude from the ejection side surface 24b of the water discharge body 24.

The nozzle tip 22 is rotatably inserted into the water discharge hole 24d in a state where the tip end 22d at one end of the gear portion 22b and the main body portion 22a projects from the ejection side surface 24b of the water discharge body 24. Here, the water discharge hole 24d serves as the rotation center of the nozzle tip 22, and the ejection side of the injection hole 22c is arranged in a state of being inclined with respect to the rotation center.

The nozzle tip 23 is rotatably inserted in the water discharge hole 24e in a state where the tip portion 23d at one end of the gear portion 23b and the main body portion 23a projects from the ejection side surface 24b of the water discharge body 24. Here, the water discharge hole 24e serves as the rotation center of the nozzle tip 23, and the injection side of the injection hole 23c is arranged in a state of being inclined with respect to the rotation center. Here, the nozzle tips 22 and 23 are aligned in the respective inclination directions on the emission side of the respective emission holes 22c and 23c such that they are outward or inward, and the inclination directions are aligned to the respective openings (24db, 24eb). It is inserted and placed.

The nozzle tip 22 and the nozzle tip 23 are arranged such that the gear portion 22b of one nozzle tip 22 meshes with the gear portion 23b of two adjacent nozzle tips 23, respectively. As a result, the nozzle tip 22 and the two nozzle tips 23 rotate in conjunction with each other. In the present embodiment, the gear portion 22b of the nozzle tip 22 is arranged so as to mesh with the gear portion 21b of the nozzle tip 21, but it is not necessary to mesh with the gear portion 21b of the nozzle tip 21, and the nozzle tip 21 is a gear. It is also possible to adopt a configuration that does not have the portion 21b.

In the transmission member 25, the water discharge body 24 is attached to the attachment portion 25b at the exit side end of the cylindrical main body 25a, and the water discharge body 24 is configured to be rotatable with the transmission member 25 about the central axis direction. There is.

Three vertical grooves 25f are formed in the mounting portion 25b at equal intervals in the circumferential direction. When the pin P1 is inserted into the vertical groove 25f, a part of the pin P1 is exposed from the vertical groove 25f toward the center. .. When attaching the water discharge body 24 to the transmission member 25, the exposed portion of the pin P1 is fitted into the vertical groove 24h of the water discharge body 24, and the transmission member 25 is integrally connected to the water discharge body 24 in a non-rotatable state. To be done.

The pin holes 25g are formed as two sets of three sets of six holes, and when the set pin P2 is inserted into one set of pin holes, the intermediate portion in the longitudinal direction of the pin P2 is located inside the mounting portion 25. Project. This projecting portion enters the circumferential groove 24f of the water discharge body 24 and is integrally connected to the water discharge body 24 and the transmission member 25 in a non-separable state in the axial direction.

On the outer peripheral surface of the transmission member 25 on the water supply side, three notch-shaped engaging portions 25c for engaging with the engaging portions 26a of the rotating member 26 are formed at 120° intervals. By this locking, the transmission member 25 and the rotating member 26 can be integrally rotated.

On the inner peripheral surface of the transmission member 25, there is provided a step portion 25d with which the locking portion 12f of the water supply body 12 is locked, and the O-rings 25h and 25i are formed so that the water supply body 12 can be liquid-tightly mounted. ing. As a result, the water discharge body 24 can be assembled as an integral shape in which the water discharge means 20 is attached to the water supply means 10 in a state where the water discharge body 24 can rotate coaxially while sliding with respect to the water supply body 12.

Further, on the water supply side of the step portion 25d, a step portion 25e for reducing the diameter of the main body portion 25a and locking the locking member 32 is formed.

The rotating member 26 is a member for rotating the transmission member 25, is formed in a ring shape, and is provided so as to cover the outer periphery of the lower end portion of the transmission member 25. Here, the transmission member 25 and the rotating member 26 correspond to the "first operating portion".

The rotating member 26 has a shape in which a locking portion 26a that locks on the inner peripheral portion of the locking member 25c of the transmission member 25 and rotates the transmission member 25 about the central axis direction corresponds to the locking portion 25c. It is formed so as to project inward. Here, since the locking portion 25c of the transmission member 25 is formed in the axial direction to be higher than the axial height of the locking portion 26a of the rotation member 26, the rotation member 26 rotates in the rotation direction with respect to the transmission member 25. In the locked state, it cannot rotate, and it can move in the axial direction, that is, forward toward the injection side or backward toward the water supply side.

In addition, positioning grooves 26b, 26c, and 26d that are positioning portions that can be engaged with the positioning pins 11d of the water supply member 11 are formed at the water supply side end of the rotating member 26. The positions of the positioning grooves 26b, 26c, and 26d correspond to the rotation amount of the water discharge body 24 when selecting the nozzle tip group, that is, the rotation amount of the transmission member 25.

The water discharge angle control means 30 includes a rotating ring 31, a locking member 32, and nozzle tips 22 and 23.

The rotating ring 31 is a cylindrical member that is rotatably provided on the water discharge body 24 from the outer peripheral portion thereof, and has a gear portion 31a provided on the inner periphery of the tip end portion. The gear portion 31a is formed so as to mesh with the gear portion 23b of the nozzle tip 23, and by rotating the rotating ring 31, it is possible to rotate the nozzle tip 23 and further the nozzle tip 22 via the gear portion 23b. it can. The rotating ring 31 is arranged in the axial direction of the central axis along with the transmission member 25 and the rotating member 26. Here, the rotating ring 31 corresponds to the “second operating portion”. Further, the gear portions 31a and the gear portions 22b and 23b, and the inclined injection holes 22C and 23C of the nozzle tips 22 and 23 allow water discharged from the nozzle tips 22 and 23 to be discharged at an angle of 0° (straight water discharge mode) and outwardly discharged ( It corresponds to the "tilt mechanism" that can be changed between the shower water discharge mode).

This rotation causes the nozzle tips 22 and 23 to rotate in conjunction with each other. Here, since the nozzle chips 22 and 23 have their inclined holes all oriented in the same direction such as outward, when the inclined holes of the nozzle chips 22 and 23 are all outward, the water discharge angle becomes maximum. It can be in the form of shower water discharge. Further, when all are directed inward, a straight water discharge form with a water discharge angle of 0° can be adopted.

The step portion 31d is a portion with which a lower end portion 74 of the bumper 71 described later comes into contact. The screw hole 31b provided on the bottom surface on the water supply side is connected to a locking member 32 described later by a screw N. The thread groove 31c formed on the outer side surface on the ejection side is used for connection with the fixing ring 61.

The locking member 32 is attached to the water supply side of the rotating ring 31 by a screw N penetrating the hole 32 a of the locking member 32 and screwed into the screw hole 31 b of the rotating ring 31, and is arranged outside the transmission member 25. It is a tubular member. The step portion 32e of the locking member 32 is locked to the step portion 25e of the transmission member 25, and the rotating ring 31 is rotatably locked to the transmission member 25. As a result, the rotating ring 31 can be assembled into an integral shape in which the water discharge angle control means 30 is attached to the water discharge means 20 in a state of being rotatable with respect to the water discharge body 24.

The locking member 32 is provided with an urging pin 32c for urging the rotating member 26 toward the pedestal portion 11b of the water supply member 11 at the end on the water supply side. The biasing pin 32c is placed on the stepped portion 26e of the rotating member 26. The urging pin 32c is urged to project toward the water supply side by a spring 32d housed in elongated holes 32b formed in the body of the locking member 32 at equal intervals in the circumferential direction. As a result, the rotating member 26 can be positioned and maintained in a state in which the positioning pin 11d of the water supply member 11 is locked in any of the positioning grooves 26b, 26c, 26d, so that the rotating member 26 rotates. I can't move. When the rotating member 26 is rotated, the rotating member 26 is pushed against the spring 32d by pushing the biasing pin 32c and moved to the ejection side in the axial direction to move the positioning grooves 26b, 26c, 26d and the positioning pin 11d. Unlock and rotate.

The nozzle device 1 includes a pressing plate 41, a protective plate 51, a fixing ring 61, a bumper 71, and the like, in addition to the above-described configuration.

The holding plate 41 is made of, for example, a resin, is a disk-shaped member having substantially the same diameter as the water discharge body 24, and has an opening 42 through which a part of the tip portions 21d, 22d, 23d of the nozzle tips 21, 22, 23 project. Are formed. The back surface of the holding plate 41 is in contact with the injection side portions of the gear portions 21b, 22b, 23b of the nozzle chips 21, 22, 23, and the holding plate 41 is attached to the water discharge body 24. 23 is prevented from separating from the water discharge holes 24c, 24d, 24e of the water discharge body 24. The holding plate 41 is fixed by a screw (not shown) screwed into the screw hole 24k of the water discharge body 24 through the mounting opening 43.

The protection plate 51 is a metal disk-shaped member formed to have a larger diameter than the pressing plate 41, and an opening through which a part of the tip portions 21d, 22d, 23d of the nozzle tips 21, 22, 23 projects. 52 is formed. The protective plate 51 is arranged so as to cover the pressing plate 41 and be pressed by the opening step portion 62 of the fixing ring 61.

The fixing ring 61 is a ring-shaped member, and has an opening step portion 62 and an inner peripheral thread portion 63. The fixed ring 61 is fixed to the rotating ring 31 by covering the opening step portion 62 from above the protective plate 51 and externally screwing the inner peripheral threaded portion 63 onto the screw portion 31 c of the rotating ring 31.

The bumper 71 is made of rubber and is a ring-shaped member for protecting the nozzle device 1 from the impact of colliding with a house or the like when extinguishing a fire, and a step 73 is formed on the inner circumference 72 of the opening. When the fixed ring 61 is fixed to the rotating ring 31, the fixed ring 61 fits into the inner circumference 72 of the opening and stops at the step 73, and the fixed ring 61 is screwed and fixed to the rotating ring 31. The lower end portion 74 of the bumper 71 abuts on the step portion 31d of the rotating ring 31 and is locked.

(Control of water discharge)
The control of the water discharge amount will be described with reference to FIG. The left view of FIG. 12(A) is a plan view of the sliding surface 24a of the water discharge body 24 as viewed from the exit side, and the right view is a perspective view of the exit side surface 12b of the water supply body 12 as viewed from the exit side. 12B to 12D, the sliding surface 24a of the water discharge body 24 and the ejection side surface 12b of the water supply body 12 are shown in an overlapping manner on the left side, and the ejection side surface 12b of the water supply body 12 is shown on the right side. Here, in order to facilitate understanding of the positional relationship between the water supply hole and the water discharge hole, for simplification, the water supply hole and the water discharge hole are not shown except for those necessary for explaining the communicating state. Further, the water supply hole 12d and the water supply hole 12e are hatched in order to make the communication state easy to understand.

The control of the water discharge amount by the nozzle device 1 is performed by selecting the nozzle tip group that discharges water. Here, a case will be described in which the amount of water discharged is reduced from the state in which water is discharged from all the nozzle tips 21, 22, 23.

When water is being discharged from all of the nozzle tips 21, 22, 23 (total of 10 nozzles), as shown in FIG. 12(B), the water discharging hole 24c faces and communicates with the water supplying hole 12c. Water is supplied to the nozzle tip 21, and the water discharge hole 24d communicates with the water supply hole 12d so that the nozzle chip group 22A composed of three nozzle chips 22 is supplied with water and the water supply hole 12e is discharged. Water is supplied to the nozzle tip group 23A including the six nozzle tips 23, with the holes 24e facing each other and communicating with each other.

At this time, the rotating member 26 is in a state of being rotated leftmost toward the ejection side, and the positioning groove 26d is locked to the positioning pin 11d. That is, the position of the positioning groove 26d is the position where the water discharge amount is the largest.

The selection of the nozzle tip group for discharging water is performed by the following procedure. First, the rotating member 26 is moved to the ejection side to release the locking of the positioning groove 26d by the positioning pin 11d. As a result, the rotating member 26 is made rotatable.

Next, after rotating the rotating member 26 to the right, the positioning groove 26c is engaged with the positioning pin 11d.

At this time, as shown in FIG. 12(C), the water discharge hole 24c faces and communicates with the water supply hole 12c, water is supplied to the central nozzle tip 21, and the water discharge hole 24e is formed with respect to the water supply hole 12e. Water is supplied to the nozzle tip group 23A by facing and communicating. On the other hand, since the water discharge hole 24d does not face the water supply hole 12d, water is not supplied to the nozzle tip group 22A. That is, water is discharged from a total of seven nozzle chips of the central nozzle chip 21 and the outer peripheral nozzle chip group 23A, and the amount of water discharged can be reduced.

Further, after rotating the rotating member 26 to the right, the positioning groove 26b is locked to the positioning pin 11d.

At this time, as shown in FIG. 12D, the water discharge hole 24c communicates with the water supply hole 12c so as to face the nozzle tip 21 with water, and the water supply hole 12d has a water discharge hole 24d. Water is supplied to the nozzle tip group 22A so as to face and communicate with each other. On the other hand, since the water discharge hole 24e does not face the water supply hole 12e, water is not supplied to the nozzle tip group 23A. That is, water is discharged from a total of four nozzle chips of the central nozzle chip 21 and the inner peripheral nozzle chip group 22A, and the amount of discharged water can be further reduced.

In this way, the transmission member 25 is rotated by the rotating member 26 by an operation that combines the forward movement and the backward movement of the rotating member 26, and the sliding surface 24a (water supply side surface) of the water discharge body 24 is moved to the water supply body. The flow rate of water can be adjusted by selecting a nozzle tip group that slides and rotates with respect to the ejection side surface 12b of 12 and communicates with the main flow path 11c of the water supply member 11.

In the above embodiment, the case where the water discharge amount is reduced has been described, but the water discharge may be started from any water discharge state, and the increase or decrease of the water discharge amount can be appropriately selected.

Since the nozzle device 1 is configured so that the water flow path becomes narrower toward the ejection side, the flow velocity becomes faster toward the ejection side. As a result, a sufficient water discharge distance can be maintained even if the amount of water discharge is reduced.

Further, in the nozzle tip group, since the nozzle tips are arranged on the concentric circles, the water discharge becomes a conical surface, and the water film can be evenly spread without any hollowing out.

(Control of water discharge angle)
The control of the water discharge angle by the nozzle device 1 is performed by changing the direction of the injection hole of the nozzle tip. Here, the operation of increasing the water discharge angle from the state in which the injection holes on the ejection side of all the nozzle tips 21, 22, 23 are directed in the same direction as the central axis direction and water is discharged at a water discharge angle of 0° will be described. To do.

When the rotary ring 31 is rotated, the rotation of the gear portion 31a is transmitted to the gear portion 23b of the nozzle tip 23, and the nozzle tip 23 is interlocked with the nozzle tip 23 through the gear portion 23b and further through the gear portion 22b. The nozzle tip 22 rotates.

The injection-side portion of the injection hole 23c of the nozzle chip 23 is inclined with respect to the rotation axis of the nozzle chip 23, and the inclination angle of the injection hole 23c continuously changes as the nozzle chip 23 rotates. When the water is discharged from the nozzle tip 23, the water is discharged from the straight state in which the water discharge angle is 0° and parallel to the central axis line to the shower state in which the water discharge angle increases and spreads from the central axis line.

The injection side portion of the injection hole 22c of the nozzle tip 22 is inclined with respect to the rotation axis of the nozzle tip 22, and is inclined outward while the inclination angle is continuously changed in association with the rotation of the nozzle tip 22. By doing so, the water discharged from the nozzle tip 22 changes from a straight state parallel to the central axis to a shower state spreading from the central axis.

In the present embodiment, the water discharge angle can be continuously changed from 0° to 32° while the water discharge from the nozzle tip 21 in the central axis direction is continued. Here, the maximum water discharge angle is due to the nozzle tip 23.

Here, since the water discharge angles of the nozzle tip group 22A and the nozzle tip group 23A can be changed in conjunction with each other, it is possible to obtain a more preferable water discharge form by only operating the rotary ring 31 once. Here, when the water discharge amount is maximum, the water discharge angle from the nozzle tip groups 22A and 23A can be continuously changed from 0° to 32°, and the water discharge form is switched between the straight state and the shower state. be able to. Even when water is discharged from the nozzle chip 21 and the nozzle chip group 22A and water is discharged from the nozzle chip 21 and the nozzle chip group 23A, the water discharge form can be switched between the straight state and the shower state. As described above, according to the nozzle device 1, the water discharge angle and the water discharge amount can be independently controlled.

(Example of change)
The number of nozzle tips can be set arbitrarily. Further, the arrangement of the nozzle tips may be a configuration that is not concentric.

As a method of inclining the injection hole as the inclining mechanism of the nozzle tip, it is possible to incline the tip portion itself or employ various configurations.

The shape and arrangement of the water discharge holes of the water discharge body and the water supply holes of the water supply body can be set appropriately as long as the nozzle chip group that discharges water can be appropriately selected.

As the tilt mechanism of the water discharge angle control means, an example of a combination of the gear part of the rotating ring and the gear part of the nozzle tip has been shown, but the invention is not limited to this, and for example, the gear part of the nozzle tip to the water discharge body and It is possible to provide a gear part to be combined, a structure using a timing belt, or the like.

In the above-mentioned embodiment, the application for extinguishing the nozzle device of the present invention has been described, but the application of the nozzle device of the present invention is not limited to extinguishing the fire, for example, washing of a vehicle or the like, water spray for agricultural use, for example. It can also be used for The nozzle device of the present invention can also be used for the emission of liquids other than water. That is, in the present specification, "water discharge" includes liquids other than water, for example, "water discharge" such as foam extinguishing agents.

The nozzle tips 21, 22, 23 can be provided with air suction holes. For example, as shown in FIG. 13, air suction holes 21f, 22f, 23f are provided in the nozzle tips 21, 22, 23, and water is sprayed from the nozzle tips 21, 22, 23 to generate air from the air suction holes 21f, 22f, 23f. It is also possible to suck the water and release it into water containing bubbles. These nozzle tips project above the upper surface of the water discharge body 24 so that the air suction holes 21f, 22f, 23f do not go into the water discharge hole when they are inserted and attached to the water discharge holes 24c, 24d, 24e of the water discharge body 24. Can be installed in the state Here, the air suction holes may be provided in all the nozzle chips, but the air suction holes 22f are provided only in the inner three nozzle tips 22 or the air suction holes 23f are provided only in the outer six nozzle tips 23. You can Further, in the outer peripheral nozzle chip 23 and the inner peripheral nozzle chip 22, air suction holes may be provided in adjacent and alternate nozzle chips. As described above, by mixing the nozzle chips having the air suction holes and the nozzle chips having no air suction holes, it is possible to perform the mixed water discharge containing no air bubbles and water containing air bubbles. As a result, a nozzle chip having no air suction hole can provide a flight distance of water discharge, and a nozzle chip having an air suction hole can improve the fire extinguishing effect by water spray of bubbles, and by mixing them, both advantages can be obtained. It should be noted that it is possible to combine the presence or absence of air suction holes in the outer and inner nozzle tips without providing the air suction hole 21f in the central nozzle tip 21.

In addition, the nozzle tip (turbulent water flow nozzle tip) that causes a turbulent flow by forming the injection hole into a “<” shape as shown in FIGS. 5(E) and (H) and FIG. 5(B). There are two types of nozzle tips that fly straight with such straight holes (direct water flow nozzle tips), and by mixing these, as in the example of the air suction holes, a direct water flow nozzle tip can provide a water discharge flight distance. The turbulent water flow nozzle tip can improve the fire extinguishing effect by turbulent water discharge. Also in this example, the central nozzle tip 21 may be a direct water flow nozzle tip, and a combination of an outer peripheral nozzle tip and an inner peripheral nozzle tip may be adopted. Further, a combination of the presence/absence of the air suction hole and the turbulent water flow/direct water flow may be used, for example, a nozzle tip having an air suction hole in the turbulent water flow nozzle tip.

(Effects of the embodiment)
According to the nozzle device 1 of the present invention, the water discharge means 20 and the water discharge angle control means 30 that are independently rotatable are provided, and the water discharge means 20 is rotated around the central axis of the water supply means 10 to discharge water. It is possible to control the water discharge amount by selecting the nozzle chip group that performs the water discharge and the nozzle chip group that does not discharge the water, and adjusting the flow rate of the water supplied to the water discharge means 20 by combining them. Further, the water discharge angle can be controlled by rotating the water discharge angle control means 30 around the central axis of the water supply means 10. Thereby, with a simple operation, for example, it is possible to control the water discharge angle and the water discharge amount, which are effective to control in fire fighting activities, respectively. Further, the water supply means 10 and the water discharge means 20 are arranged in the axial direction of the central axis, and the transmission member 25, the rotating member 26, and the water discharge angle, which are the operation parts of the water discharge means 20, are disposed outward of the central axis of the water supply means 10. Since the rotating ring 31 which is the operation portion of the control means 30 is provided, the overall structure is made compact.

(Other embodiments)
FIG. 14 shows another embodiment of the water discharge angle control means and the tilting mechanism.

The water discharge body 124 includes a main body portion 124a and a cover 124b, and a nozzle tip 121 is attached to a water discharge hole 124c at the center of the main body 124a. A hemispherical recess 124e is formed at the outlet of the water discharge hole 124d.

Among the nozzle tips 123, six nozzle tips 123 are provided on the outermost concentric circles, the nozzle cylinder portion 123b is attached to the spherical portion 123a, and the nozzle tip 123 has a structure having a flow passage inside. The lower half of the spherical body 123a is fitted in the hemispherical recess 124e of the water discharge body 124. Here, three nozzle tips 122 are concentrically provided inside the nozzle tip 123, have the same configuration as the nozzle tip 123, and the lower half of the spherical body 122 a is fitted into the hemispherical recess of the water discharge body 124. ..

The cover 124b presses the upper half of the spherical portion 123a of the nozzle tip 123 to expose the nozzle cylinder portion 123b, and supports the nozzle portion 123a so as not to separate from the main body portion 124a. As a result, the nozzle tip 123 is supported by the water discharge body 124 in a state in which the spherical portion 123a is rotated by the hemispherical concave portion 124e and the nozzle hole direction of the nozzle cylindrical portion 123b is variable by 360 degrees. Here, the nozzle tip 122 is also supported by the water discharge body 124 by the same structure as the nozzle tip 123.

A packing 124f is provided between the main body 124a and the cover 124b.

A disc-shaped direction regulating plate 80 is attached to the upper end of the main body portion 124a. The direction regulating plate 80 is provided with a direction regulating groove 81 through which the nozzle cylinder portion 123b penetrates, through which the nozzle tip 123 can be inclined radially outward from the position of the water discharge angle of 0° in the same direction as the central axis direction. Similarly, a direction regulating groove 82, through which the nozzle cylinder portion 122b penetrates, is formed radially outward from the position of the water discharge angle of 0° of the nozzle tip 122.

The tubular portions 123b and 123b of the nozzle tips 122 and 123 can be tilted outward in the radial direction along the direction regulating grooves 82 and 81, and movements other than those directions are regulated.

The rotating ring 131 is a cylindrical member that is rotatably provided on the water discharge body 124 from the outer peripheral portion thereof. The rotating ring 131 corresponds to the "second operation unit".

A disc-shaped rotating plate 90 is attached to the rotating ring 131 so as to cover the direction regulating plate 80. A cam groove 91 through which the nozzle cylinder portion 123b of the nozzle chip 123 penetrates, a cam groove 92 through which the nozzle cylinder portion 122b of the nozzle chip 122 penetrates, and a hole portion 93 through which the nozzle chip 121 penetrates, on the rotating plate 90. Are formed.

The cam groove 91 has one end formed in a shape having an outward convex arc corresponding to the position of the cylindrical portion 123b when the nozzle tip 123 is oriented at a water discharge angle of 0°. One end of the cam groove 92 corresponds to the position of the cylindrical portion 122b when the nozzle tip 122 is oriented at a water discharge angle of 0°, and is formed in a shape having an outwardly convex arc.

When the rotating ring 131 is operated and rotated in the clockwise direction (direction A) in FIG. 14B, the rotation is transmitted to the cam groove 91 of the rotating plate 90, and the nozzle cylinder portion 123b of the nozzle tip 123. Tries to move outward along the cam groove 91. Since the movement direction of the nozzle cylinder portion 123b is regulated by the direction regulation groove 81 of the direction regulation plate 80, the nozzle cylinder portion 123b is inclined outward in the radial direction. As a result, the nozzle cylinder portion 123b (flow path on the ejection side) of the nozzle tip 123 can be tilted between the central axis direction and the radially outer side, and the water discharge angle can be continuously changed. Similarly to the nozzle tip 123, the nozzle tip 122 can also continuously change the water discharge angle by the cam groove 92 and the direction regulating groove 82. That is, the spherical portion of the nozzle tip, the hemispherical concave portion, the cam groove 91 and the direction regulating groove 81, the cam groove 92 and the direction regulating groove 82 correspond to the "tilt mechanism".

As described above, the water discharge angle control means capable of switching the water discharge form between the straight state and the shower state can be configured by the tilting mechanism including the spherical portion of the nozzle tip, the hemispherical concave portion, the cam groove, and the like.

DESCRIPTION OF SYMBOLS 1... Nozzle device 10... Water supply means 11... Water supply member 11a... Main body part 11b... Pedestal part
11c...Main flow path 11d...Positioning pin 11e...Screw groove 11f...Screw groove 12...Water supply body 12a...Water supply chamber 12b...Exiting side surfaces 12c, 12d, 12e... ... Water discharge means 21... Nozzle tip 21a... Main body 21b... Gear 21c... Injection hole 21d... Tip 21f... Air suction hole 22... Nozzle chip 22A... Nozzle chip group 22a... Main body 22b... Gear 22c... Injection hole 22d. ... tip part 22f... air suction hole 23... nozzle tip 23A... nozzle tip group 23a... body part 23b... gear part 23c... injection hole 23d... tip part 23f... air suction hole 24... water discharge body 24a... sliding surface 24b... injection Side surface 24c... Water discharge hole 24d... Water discharge hole 24e... Water discharge hole 24f... Circumferential groove 24g... Insertion portion 24h... Vertical groove 25... Transmission member 25a... Main body portion 25b... Attachment portion 25c... Locking portion 25d... Step portion 25e... Step portion 25f... Vertical groove 25g... Pin hole 26... Rotating member 26a... Locking portions 26b, 26c, 26d... Positioning groove 26e... Step portion 30... Water discharge angle control means 31... Rotating ring 31a... Gear portion 31b... Screw hole 31c... Screw groove 31d... Step portion 32... Locking member 32a... Hole portion 32b... Long hole 32c... Energizing pin 32d... Spring 32e... Step portion 41... Holding plate 42... Opening portion 43... Mounting opening 51... Protective plate 52... Opening Part 61... Fixing ring 62... Opening step part 63... Inner circumference screw part 71... Bumper 72... Opening inner circumference 73... Step 74... Lower end part 80... Direction regulation plate 81, 82... Direction regulation groove 90... Rotation plate 91, 92... Cam groove 92... Hole 121... Nozzle tip 122... Nozzle tip 122b... Nozzle cylinder 123... Nozzle tip 123a... Sphere 123b... Nozzle cylinder 124... Water discharge body 124a... Main body 124b... Cover 124c... Water discharge hole 124d ... Water discharge hole 124e... Hemispherical recess 124f... Packing 131... Rotating ring

Claims (8)

A water supply means that is connected to a water supply source and that has a main flow path for supplying water supplied from the water supply source to the water discharge means;
Multiple nozzle tips,
Water discharge means for discharging water supplied from the water supply means from the nozzle tip,
Water discharge angle control means for controlling the water discharge angle of the water discharge from the plurality of nozzle tips,
Equipped with
The water discharge means,
A first body formed so as to form a plurality of nozzle tip groups by a nozzle tip selected from the plurality of nozzle tips, and a water discharge passage communicating with each nozzle tip group is formed to face the water supply means and open. Equipped with
A first operation part for operating the water discharge means by rotation and a second operation part for operating the water discharge angle control means by rotation are arranged in the axial direction of the central axis of the water supply means, respectively. Is configured to be independently rotatable around the central axis,
By rotating the first body around the central axis to rotate the first body and selecting a nozzle chip group that communicates with the main flow path from the nozzle chip group, the water discharge means is provided. The flow rate of water supplied to
A water discharge nozzle device capable of controlling a water discharge angle by rotating the second operation portion around the central axis. The water supply means,
A water supply member that is connected to the water supply source and forms a main flow path of water supply;
A second body that is connected to the end portion on the ejection side of the water supply member and that has a water supply passage that is in communication with the main passage and that supplies water corresponding to each of the nozzle tip groups;
The water discharge means,
As the first operation unit,
A transmission member that is formed in a tubular shape to which the first body is connected at one end, is configured to be rotatable around the central axis, and covers the water supply means;
A rotation member for locking the other end of the transmission member to rotate the transmission member,
The water supply means and the water discharge means,
The transmission member is rotated by the rotation member, and the surface on the water supply side of the first body is fluid-tightly slidable with respect to the surface on the ejection side of the second body so as to be rotatable. Was
The nozzle device according to claim 1, wherein a nozzle chip group that communicates with the main channel is selectable by selecting the water discharge channel that communicates with the water supply channel. The rotation member is attached to the other end of the transmission member such that the rotation member cannot rotate relative to the transmission member while being locked in the rotation direction, and can be moved forward toward the injection side of the central axis or backward toward the water supply side. Has been
3. A positioning unit is provided for positioning an operation that combines a forward movement and a backward movement of the rotating member and a rotation in order to select a desired nozzle chip group communicating with the main flow path. Nozzle device according to. 4. The nozzle chip group according to claim 1, wherein the plurality of nozzle chip groups are each formed by arranging the plurality of nozzle chips in a concentric circle shape and respectively arranging the nozzle chips on the same concentric circle. The nozzle device according to any one of the above. By transmitting the rotation of the water discharge angle control means by the second operating portion to each nozzle tip, it is possible to control the inclination angle at which the flow path on the ejection side of each nozzle tip inclines with respect to the central axis. The nozzle device according to any one of claims 1 to 4, which is characterized. The nozzle device according to any one of claims 1 to 5, wherein the water discharge angle control means changes the water discharge angle of the nozzle chips of each nozzle chip group in an interlocking manner. The second operation portion of the water discharge angle control means is
A cylindrical rotating ring provided inside the transmission member and provided rotatably,
7. The locking member, which is provided inside the transmission member and locks the rotary ring rotatably with respect to the transmission member, according to any one of claims 1 to 6. Nozzle device according to. The nozzle tip is provided on the water discharge member such that the injection side flow channel is tiltable between the central axis direction and the radial outside.
The nozzle device according to claim 7, further comprising an inclining mechanism that transmits the rotation of the rotating ring to the nozzle tip to incline the flow path on the ejection side of the nozzle tip.

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