JPH09285561A - Nozzle for fire hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nozzle for a fire hose of a simple structure which can be easily handled and hard to fail, of which manufacturing cost is low, and with which a fireman in fire fighting activity can be protected. SOLUTION: A device is provided with a fixed nozzle main body 1 installed on a tip of a fire hose 30, a first cylinder 2 threaded with a male screw 5b of the fixed nozzle main body 1, and a second cylinder 3 threaded with a male screw 22 of the first cylinder 2. The first cylinder 2 has an inner cylinder wall 12 and an outer cylinder wall 13 concentrically, and the tip 4b side of the fixed nozzle main body 1 is inserted to a circular slit part 25 formed of the inner cylinder wall 12 and the outer cylinder wall 13.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a fire hose nozzle.

[0002]

2. Description of the Related Art A conventional fire hose nozzle is provided with a disc member that can be screwed back and forth in an opening at the tip of the nozzle body.
This disc member is screwed back and forth to adjust the clearance between the disc member and the opening, and to stop water discharge, stick-shaped water discharge, and spray water discharge.
It was to switch to a pattern. That is, the disk member is used to cover the opening to stop the water discharge, the clearance is enlarged to discharge water in a rod shape (straight), and the clearance is narrowed to spray water. In other fire hose nozzles, these three patterns are switched by operating a cock provided in the nozzle body with a lever provided outside the nozzle body. In other words, this product has an inner cylinder inside the nozzle body, and water is sprayed through the inner cylinder in a rod shape, and it is switched by a cock and water is sprayed between the nozzle body and the inner cylinder to spray water and the cock is closed. Then, the water discharge is stopped.

[0003]

However, in the case of a fire hose nozzle that is switched by screwing the disk member back and forth, when spraying water in the shape of a rod, the water collides with the disk member and the water blows in the air and the resistance of the disk member increases. received,
There was a problem that it was difficult to fly far. Further, in the other fire hose nozzles, there is a problem that the structure becomes complicated and the cost becomes high and a failure such as water leak from the cock portion occurs, and the lever protruding to the outside interferes with the work. there were.

Therefore, it is an object of the present invention to provide a fire hose nozzle which has a simple structure, is easy to handle, is hard to break down, is inexpensive to manufacture, and is capable of protecting firefighters in fire fighting activities. .

[0005]

In order to achieve the above object, a fire hose nozzle according to the present invention comprises a fixed nozzle body attached to the tip of the fire hose, an inner cylinder wall and an outer cylinder wall. A first cylinder having a concentric circular slit formed by the inner cylinder wall and the outer cylinder wall, into which the front end side of the fixed nozzle body is inserted, and an outer peripheral surface having a male screw, and the first cylinder. A second cylindrical body having an internal thread having an internal thread to be engaged with the external thread of the above, and further, a plurality of flow paths are opened at the tip of the annular slit section, and water from the fixed nozzle main body The first cylindrical body and the second cylindrical body are assembled so as to be independently rotatable and screwed forward and backward so that water can be simultaneously or alternatively switched to the annular slit portion of the first cylindrical body and inside the first cylindrical body. It is a thing.

Further, an inner collar portion is provided at the tip of the second tubular body, and an outer collar portion capable of contacting and sealing from the outer end side of the inner collar portion is provided at the tip of the first tubular body, and The amount of water discharged through the annular slit portion can be adjusted by adjusting the clearance between the outer flange portion and the inner flange portion by the relative screw forward and backward movement of the second tubular body.

Further, a seal member that abuts on the base end of the inner cylinder wall of the first cylinder is fitted into a block portion provided inside the fixed nozzle body, and the base end is screwed back and forth. The amount of water discharged through the inside of the first cylindrical body can be adjusted by adjusting the gap between the sealing material and the sealing material.

Further, a sealing material is provided between the outer cylinder wall of the first cylinder and the second cylinder and between the inner cylinder wall of the first cylinder and the fixed nozzle body.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail with reference to the drawings showing the embodiments.

FIG. 1 shows an embodiment of a fire hose nozzle according to the present invention. This fire hose nozzle comprises a fixed nozzle body 1 attached to the tip of a fire hose 30,
The first cylinder 2 is screwed and connected to the fixed nozzle body 1, and the second cylinder 3 is screwed and connected to the first cylinder 2.

The fixed nozzle body 1 has a base end 4a of a peripheral wall 9.
The side has a diameter larger than that of the tip 4b side via the stepped portion 10 and has a female thread 5a on the inner peripheral surface 6 of the base end 4a. For example, a pipe fitting (not shown) attached to the tip of the fire hose 30. It is screwed with the male screw of and is connected for communication.

The tip 4b of the peripheral wall 9 rather than the stepped portion 10
Male screw 5b is provided on the outer peripheral surface 7 on the side of
A plurality of connecting rod portions 11 projecting in the axial direction from the inner peripheral surface 6 of 10
A block portion 8 having a hexagonal cross-section is provided through. The mutual gap between the plurality of connecting rod portions 11 serves as a water flow path 33.

A sealing material 35 (such as an O-ring) is fitted in a small groove 39 formed on the outer peripheral surface 34 (parallel to the axis) of the block portion 8. The inner peripheral surface 6 of the stepped portion 10 is formed in a tapered shape in which the diameter of the proximal end 4a side is expanded so that water can smoothly flow into the flow path 33.

The first tubular body 2 has an inner tubular wall 12 and an outer tubular wall 13 concentrically, and the fixed nozzle body is provided in an annular slit portion 25 formed by the inner tubular wall 12 and the outer tubular wall 13. Tip 4b of 1
Is inserted.

More specifically, the inner cylinder wall 12 has a male screw 16 on the outer peripheral surface 15a near the tip 14b thereof and an outer collar portion 17 on the tip 14b. Also, the inner peripheral surface of the base end 14a
15b is provided with a tapered surface 18 whose diameter is expanded toward the base end 14a, and the tapered surface 18 can be brought into close contact with the sealing material 35 fitted to the block portion 8 of the fixed nozzle body 1 (described above). ing.

The outer cylinder wall 13 is provided with a polygonal outer brim-shaped rotation operating portion 41 on the outer peripheral surface 21a of the base end 19a, and a male screw 22 on the middle portion. Further, the inner peripheral surface 21b is provided with a female screw 20b to be engaged with the male screw 5b of the fixed nozzle body 1, and the tip 19b has a female screw 20a and is provided along the inner peripheral face 21b. A stepped portion 23 having a plurality of flow paths 24 is provided.

Then, the female screw 20a of the outer cylinder wall 13 and the inner cylinder wall
The outer cylinder wall 13 and the inner cylinder wall 12 are integrated with each other by forming the first cylinder body 2 by screwing the male threads 16 of 12 together, and
The annular slit portion 25 is formed between the inner cylinder wall 12 and the outer cylinder wall 13. A plurality of the flow paths 24 are opened at the tip of the annular slit portion 25.

The annular slit portion 25 of the first cylindrical body 2
Then, the tip 4b of the fixed nozzle body 1 is inserted, and the male screw 5b of the fixed nozzle body 1 and the female screw 20 of the outer wall 13 of the first tubular body 2 are inserted.
b is screwed and connected. At this time, a gap portion of the annular slit portion 25 is formed between the inner peripheral surface 6 of the fixed nozzle main body 1 and the outer peripheral surface 15a of the inner cylindrical wall 12 of the first cylindrical body 2 to form a flow path 36. . That is, the slit width of the annular slit portion 25 is set larger than the thickness of the fixed nozzle body 1.

Further, between the outer cylinder wall 13 of the first cylinder body 2 and the fixed nozzle body 1, (the outer peripheral surface 7 tip 4 of the fixed nozzle body 1)
A sealing material 35 is provided which fits in the small groove 39 formed in b) to prevent water leakage.

The second cylinder 3 has a female screw 27 on its inner peripheral surface 26b that is screwed into the male screw 22 of the outer cylinder wall 13 of the first cylinder 2, and the shaft 28 extends from the inner peripheral surface 26b of the tip 28. An outer flange 17 of the first tubular body 2 and an inner flange 29 capable of contacting and sealing from the outer end side are provided so as to project in the axial direction.

The outer peripheral surface 26a from the middle to the tip 28 of the second tubular body 3 is covered with a cover member 32 (of rubber or the like) having a plurality of anti-slip ridges 31 ... Also, the first
Between the outer cylinder wall 13 of the cylinder body 2 and the second cylinder body 3, there is provided a seal member 35 which fits into the small groove 39 at the tip 19b of the outer cylinder wall 13 to prevent water leakage.

The assembly of the fire hose nozzle (of the present invention) will be briefly described below.
The sealing material 35 is fitted to the cylindrical body 2 respectively, and the fixed nozzle body 1
The outer cylindrical wall 13 of the first cylindrical body 2 is screwed onto. And the outer cylinder wall 13
Then, the second cylinder 3 is screwed on, and finally the inner cylinder wall 12 of the first cylinder 2 is screwed on the outer cylinder wall 13. At this time, the inner tubular wall 12 and the outer tubular wall 13 are firmly screwed and coupled to each other to form the first tubular body 2,
The first tubular body 2 can be rotationally screwed forward and backward with respect to the fixed nozzle body 1, and the first tubular body 2 and the second tubular body 3 are relatively rotatable and forward and backward assembled.

In this fire hose nozzle, the water from the fixed nozzle body 1 is switched to the annular slit portion 25 of the first tubular body 2 and the inside of the first tubular body 2 simultaneously or alternatively. As described above, the first tubular body 2 and the second tubular body 3 are assembled so as to be independently rotatable and screwed forward and backward (as described above), and the first tubular body 2 and the second tubular body 3 at hand are connected to each other. By rotating and advancing and revolving, it is possible to perform a four-pattern water discharge form of a rod-shaped (straight-shaped), simultaneous injection of a rod-shaped and water-smoke-shaped, spray-shaped, simultaneous injection of a rod-shaped and spray-shaped, and water-discharging stop. In addition, the amount of water discharged can be adjusted. Here, the mist screen is a dish-shaped water film ejected from the nozzle.

First, the state of water discharge stop will be described with reference to FIG.
As shown in FIG. 5, the rotation operating portion 41 of the first tubular body 2 is fully retracted in the direction of the base end 19a, and the rotation operating portion 42 (having a large number of ridges) of the second tubular body 3 is moved in the direction of the tip 28. Rotate forward to full.

Then, the taper surface 18 of the base end 14a of the inner tubular wall 12 of the first tubular body 2 is brought into close contact with the sealing material 35 of the block portion 8 of the fixed nozzle main body 1 so that the inside of the first tubular body 2 is exposed. The flow path is closed, and the water from the fixed nozzle body 1 cannot pass through the inside of the first cylindrical body 2 and be jetted to the outside. Further, the inner end of the outer flange portion 17 of the first tubular body 2 is located on the outer end 37 side of the inner flange portion 29 of the second tubular body 3.
Since 38 abuts and seals, water from the fixed nozzle body 1 cannot be jetted to the outside through the flow path 36 of the annular slit portion 25. Therefore, the water discharge can be stopped while the water pressure is still applied to the nozzle.

Then, in order to switch from the water discharge stopped state to the rod-shaped water discharge, as shown in FIG. 2, the first cylindrical body 2 is rotated and advanced to the full extent. Then, the tapered surface of the inner cylinder wall 12 base end 14a
18 separates from the sealing material 35 of the fixed nozzle body 1 block portion 8, the fixed nozzle body 1 communicates with the inside of the first tubular body 2, and the water from the fixed nozzle body 1 passes through the inside of the first tubular body 2. , As shown by arrow A, it is ejected in a rod shape (straight shape) from the ejection port 43 to the outside.

At this time, since the contact and sealing state of the inner flange portion 29 and the outer flange portion 17 is maintained, when the first tubular body 2 is rotated, the second tubular body 3 is also moved along with the first tubular body 2. Rotate in the same direction. That is, the second tubular body 3 and the first tubular body 2 do not relatively rotate forward and backward. The inner peripheral surface 21b of the first cylindrical body 2 outer cylindrical wall 13 slides on the sealing material 35 provided on the outer peripheral surface 7 of the fixed nozzle body 1, but the sealing material 35 is a small groove on the outer peripheral surface 7. As it is fitted in 39, it will not slip or come off and prevent water leakage.

The gap M ₁ between the base end 14a and the seal member 35 is adjusted by adjusting the screw advance / retreat of the first cylinder 2 with respect to the fixed nozzle body 1, and the first cylinder is adjusted by adjusting the gap M _1. 2 The amount of water discharged through the inside is adjusted. That is, it is possible to freely change from a small amount of water to a large amount of water with the first cylindrical body 2 at hand.

Next, in order to apply a water smoke screen to the rod-shaped water discharge, as shown in FIG. 3, the second cylinder 3 is rotated and retracted to the full, and the inner flange portion 29 of the tip 28 is moved to the first cylinder. It is separated from the second outer flange portion 17. At this time, the first cylindrical body 2 is fixed nozzle body 1
However, the second cylindrical body 3 is independently rotated and retracted without rotating.

Then, the water from the fixed nozzle body 1 is divided into the inside of the first tubular body 2 and the annular slit portion 25 (flow passage 36) at the base end 14a of the outer tubular wall 13 of the first tubular body 2, The water passing through the inside of the one tubular body 2 is ejected in a rod shape as described above, and the water passing through the annular slit portion 25 passes through the flow passage 24 of the outer tubular wall 13 through the gap M ₂ between the inner collar portion 29 and the outer collar portion 17. It spouts out through. At this time, the gap M
_{Since the} water passing through ₂ collides with the inner end 38 of the outer flange portion 17 and is ejected, the water is sprayed in a substantially radial (dish-like) shape (as indicated by arrow B) with respect to the rod-shaped water discharge (arrow A).

Next, as shown in FIG. 4, the second cylindrical body 3 is rotated forward from the simultaneous water discharge state of the rod shape and the smoke curtain shape to move the inner flange portion 29 and the outer flange portion (of the first cylindrical body 2). The clearance M ₂ with 17 is shortened. At this time, the first tubular body 2 does not rotate relative to the fixed nozzle body 1, but only the second tubular body 3 independently rotates and advances.

Then, the inner collar portion 29 and the outer collar portion 17 have a cross section of substantially S.
A narrow channel 40 having a character shape is formed, and water passing through the channel 40 from the fixed nozzle body 1 can be ejected as a cylindrical spray (as indicated by an arrow C), and at the same time, inside the first tubular body 2. The water that has passed through can be jetted in a rod shape from the jet port 43 to the center of the cylindrical spray. In other words, the ejection force of water is increased by narrowing the opening M _{2, and the} dish-shaped smoke screen (described above) is gradually squeezed to form a cylindrical spray.

Then, as shown in FIG. 5, the first tubular body 2 is moved together with the second tubular body 3 (without relatively rotating the second tubular body 3 and the first tubular body 2 back and forth). When it is rotated back all the way,
The taper surface 18 of the base end 14a of the first tubular body 2 is fixed to the fixed nozzle body 1
The block member 8 is brought into close contact with the sealing material 35 to close the gap M ₁ . As a result, the rod-shaped water discharge that passes through the inside of the first cylindrical body 2 is stopped, and only the cylindrical spray can be discharged.

[0034] Then, if only the second cylindrical body 3 is rotated forward independently narrowed the gap opening M _2, water discharge amount gradually decreases, turning the water discharge is stopped and the second cylindrical body 3 to the full All the water discharge stop states described in FIG. 1 are set. That is, by adjusting the gap between the outer flange portion 17 and the inner flange portion 29 (clearance port M ₂ ) by the relative screw forward and backward movement of the first tubular body 2 and the second tubular body, The amount of water discharged can be adjusted.

As described above, the rod-shaped water discharge, the rod-shaped and water-smoke-shaped simultaneous water discharge, the spray-shaped water discharge, the rod-shaped and the spray-shaped simultaneous water discharge, and the stop of the water discharge are performed by the first cylinder body 2 and the second cylinder body 3 at hand. It can be switched, and one desired form of water discharge can be immediately changed according to a fire situation. In this way, the first cylinder 2 and the second cylinder 3 can be freely rotationally screwed relative to each other and rapidly switched.

[0036]

Since the present invention is configured as described above, the following effects can be obtained.

(According to the fire hose nozzle according to the first aspect), the first cylinder 2 and the second cylinder 3 can be independently rotated and screwed back and forth to switch to various water discharge modes. That is, when water is sent only to the inside of the first cylindrical body 2, water is discharged in a rod shape (straight shape) from the nozzle outlet 43, and when water is supplied only to the annular slit portion 25, a gap opening around the nozzle 43 is provided. When water is diffusely discharged from M ₂ and is sent to both the inside of the first cylindrical body 2 and the annular slit portion 25, rod-shaped water discharge and diffused water discharge can be performed at the same time, and a water discharge form corresponding to a fire situation can be obtained. You can select and switch easily. Furthermore, since no other member (which is an obstacle) is disposed in front of the ejection port 43, the rod-shaped water discharge from the inside of the first cylindrical body 2 can be blown straight (straight) to a long distance without being diffused. it can.

Further, since the structure is relatively simple, it is easy to manufacture, the manufacturing cost is low, and there are few failures.
Further, (the nozzle for the fire hose of the present invention) is compact, and since the switching structure is based on the rotation screw advance / retreat of the first cylinder 2 and the second cylinder 3, protrusions such as arms and levers are provided outside the nozzle. It can be omitted and it will be easy to handle during fire fighting.

(According to the fire hose nozzle according to the second aspect), the first and second cylinders 2 and 3 are relatively screwed forward and backward so that the outer flange 17 and the inner flange 29 are separated from each other. The gap opening M ₂ can be adjusted. Thus, it is possible to freely adjust the water discharge amount of water to be ejected from the gap outlet M ₂ through an annular slit portion 25 at hand may perform water discharge stop.

Further, by expanding the clearance M ₂ ,
Water can be jetted out and diffused in the form of a smoke screen (dish-shaped water film) from the crevice M ₂ , and the smoke screen can serve as a shield to protect firefighters in fire fighting activities from hot air or the like. In addition, the gap M
By narrowing ₂ , water can be sprayed (diffused).

(According to the nozzle for a fire hose according to claim 3), the inner cylinder wall 12 base end 14a of the first cylinder 2 and the block of the fixed nozzle body 1 are rotated and retracted by rotating the first cylinder 2. It is possible to adjust the gap M ₁ with the sealing material 35 fitted to the portion 8. As a result, it is possible to freely adjust the amount of water sprayed from the spray port 43 through the inside of the first tubular body 2 by hand, and to stop water spray.

(According to the fire hose nozzle of claim 4) Between the outer cylinder wall 13 of the first cylinder 2 and the second cylinder 3 and the inner cylinder wall 12 of the first cylinder 2 fixed. Water leakage from the nozzle body 1 can be prevented, and the water supplied from the pump can be discharged without waste.

[Brief description of drawings]

FIG. 1 is a half cross-sectional view showing an embodiment of a fire hose nozzle of the present invention.

FIG. 2 is a cross-sectional view of an essential part showing a state at the time of water discharge in a rod shape.

FIG. 3 is a cross-sectional view of essential parts showing a state when water is simultaneously discharged in a rod shape and a smoke screen.

FIG. 4 is a cross-sectional view of an essential part showing a state at the time of simultaneous water discharge in a rod shape and a spray shape.

FIG. 5 is a cross-sectional view of essential parts showing a state during spraying of water.

[Explanation of symbols]

1 Fixed Nozzle Main Body 2 1st Cylindrical Body 3 2nd Cylindrical Body 4b Tip 5b Male Screw 7 Outer Surface 8 Block Part 12 Inner Cylinder Wall 13 Outer Cylinder Wall 14a Base End 14b Tip 17 Outer Collar 20b Female Thread 24 Channel 25 Ring slit portion 26b in the peripheral surface 28 tip 29 in the flange portion 30 fire hose 35 sealing material 37 outer end M ₁ gap M ₂ gap opening

Claims (4)

[Claims] 1. A fixed nozzle body 1 attached to the tip of a fire hose 30, an inner cylinder wall 12 and an outer cylinder wall 13 which are concentrically formed and are formed by the inner cylinder wall 12 and the outer cylinder wall 13. A first cylindrical body 2 having the outer peripheral surface 7 having a male screw 5b while the tip 4b side of the fixed nozzle body 1 is inserted into the annular slit portion 25;
A second cylinder 3 having a female screw 20b on the inner peripheral surface 26b to be screwed into the male screw 5b of the first cylinder 2; and a plurality of flow paths 24 at the tip of the annular slit portion 25. The first tubular body 2 is opened so that the water from the fixed nozzle body 1 can be switched into the annular slit portion 25 of the first tubular body 2 and the inside of the first tubular body 2 simultaneously or alternatively. A nozzle for a fire hose, characterized in that it is assembled independently of the second tubular body 3 so that it can be screwed forward and backward. 2. An outer flange portion 17 which is provided with an inner flange portion 29 at the tip end 28 of the second tubular member 3 and which can be brought into contact with and sealed from the outer end 37 side of the inner flange portion 29 at the tip end 14b of the first tubular member 2. Is provided, and the clearance M ₂ between the outer flange portion 17 and the inner flange portion 29 is adjusted by the relative screw forward / backward movement of the first cylindrical body 2 and the second cylindrical body 3 to allow the clearance through the annular slit portion 25. The fire hose nozzle according to claim 1, wherein the amount of water is adjustable. 3. The seal member 35, which abuts on the base end 14a of the inner cylinder wall 12 of the first cylinder body 2, is fitted into the block portion 8 provided inside the fixed nozzle body 1, and The above base end by screwing back and forth
The fire hose nozzle according to claim 1 or 2, wherein the amount of water discharged through the inside of the first cylindrical body 2 can be adjusted by adjusting a gap M ₁ between the seal member 35 and 14a. 4. A sealing material 35 between the outer cylindrical wall 13 of the first cylindrical body 2 and the second cylindrical body 3 and between the inner cylindrical wall 12 of the first cylindrical body 2 and the fixed nozzle body 1, respectively. The nozzle for a fire hose according to claim 1, 2 or 3, wherein the nozzle is provided.