JPS63249580A - Discharge gun - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) The present invention relates to a water cannon that is attached to the tip of a fire hose.

There are two types of water cannons used for extinguishing warp fires: those that only spray water in the form of a bar, and those that can be switched between water spray in the form of a bar and water spray.

Water spray in the form of a bar is used to deal with ordinary fires, and water spray in the form of a spray is used to deal with fires in high-rise buildings. In the event of a fire in a high-rise house, if a stick of water is used, the downstairs will be flooded, so when the water is vaporized by spraying water, the latent heat of vaporization and volumetric expansion taken from the surrounding area will suppress the flaming phenomenon and extinguish the fire, preventing leakage to the downstairs. This is to prevent this.

A water cannon dedicated to rod-shaped water cannon will be explained with reference to FIG. In the figure, (1) is a tubular nozzle body whose rear end is closed, a nozzle tip (1a) is provided at the tip, and an injection hole (1b) is bored at the tip. Nozzle body (
An annular valve seat (lc) is formed projecting on the rear inner wall of the nozzle body (1), and a water inlet hole (2) is bored in the lower part of the nozzle body (1) behind the valve seat (1c). (3) is a base pipe attached to the rear lower side of the nozzle body (1) so as to communicate with the inflow hole (2);
Water is supplied into the nozzle body (1). A poppet (4) is fitted behind the valve seat (IC) within the nozzle body (1) and closes or opens the inflow hole (2) by moving back and forth. (5) is a handle that rotates around a rotating shaft (6) at the rear upper part of the nozzle body (1) as a fulcrum. This rotation causes a pin (7) attached to the rear of the poppet (4) to move the poppet (4) back and forth. The rear end of the poppet (4) and the nozzle body (
A first compression spring (8) is inserted between the end of the handle (5) and the poppet (4) is moved forward to close the inflow hole (2) in a steady state in which the handle (5) is not pulled. are doing. (9) is a grip installed at the front lower part of the nozzle body (1).

In a water cannon dedicated to a rod-shaped water cannon, when the handle (5) is pulled, the poppet (4) retreats against the compression force of the first compression spring. Then, the inflow hole (2) opens and water is sent from the base pipe (3) into the nozzle body (1) and is discharged from the injection hole (1b). When the handle (5) is released, the first compression spring (8) advances the poppet (4) and closes the inflow hole (2) so that no water can enter the nozzle body.

Next, a fifth water cannon that can switch between rod-shaped water spray and spray-like water spray is installed.
This will be explained with reference to the figures.

Nozzle body (1), inflow hole (2), root pipe (
3), the poppet (4), etc. are the same as the water cannon exclusively for rod-shaped water cannon, so the explanation will be omitted. (10) is a spool (hereinafter referred to as the first spool) that is supported by a ribbed guide (1) in the nozzle tip (1a), and the tip is designed to fit into the inner wall of the nozzle tip (1a). Tapered water spray nozzle tip (10a
), and a cavity (10b) is provided in the nozzle tip (10a) for spraying water, and a hole (10c) is provided in the peripheral wall at the end of the cavity (10b) to allow water to flow in from the nozzle body (1).
) is drilled. (12) is a screw that is fitted and fixed in the cavity (10b) of the nozzle tip (10a) for spraying water, and has a plurality of spiral grooves carved on its outer peripheral surface.

When water passes through this spiral groove, it becomes a swirling flow and is sprayed. (13) is a pin attached to an eccentric position on the upper surface of the grip (9) which is rotatably inserted.
The pin (13) is loosely fitted into the rear end of the first spool (10) with a long hole drilled in the short side direction, and the pin (13) is rotated by the rotation of the grip (9), and the first spool (10) is rotated. They are connected to move forward and backward. When the first spool (10) moves forward, the spray water nozzle tip (10a) comes into close contact with the inner wall of the nozzle tip (1a), and the hole (10c) of the first spool is opened from the ribbed guide (1). The displacement allows water to flow from the inside of the nozzle hole (1) to the nozzle tip (10a) for spraying water.

A conventional water cannon that can switch between rod-shaped water spray and spray-like water spray is constructed as described above, and its operation will be explained next.

When the handle (5) is pulled, the poppet (4') retracts against the first compression spring (8), as shown in solid lines.

On the other hand, the first spool (10) is in the retracted position as shown, and water flows from the root pipe (3) to the inlet hole (2),
Water passes through the nozzle body (1) and is discharged from the injection hole (1b) in the form of a rod. Grip (
9), the first spool (10) moves forward,
Spray water nozzle tip (10a) and nozzle tip (1
At the same time as the inner wall of the first spool (10
) hole (10C) communicates with the inside of the nozzle body (1). Therefore, from the root pipe (3) to the nozzle body (1
) The water that entered the hole (10C) of the first spool (10)
) flows into the water spray nozzle tip cavity (10b), passes through the spiral groove of the screw (1)), becomes a swirling flow, and is sprayed from the injection hole (1b). When the fire is extinguished, the handle (5) is released and the first compression spring (8) advances the poppet (4) to the imaginary line, so that the poppet (4) closes the inflow hole (2).
Prevent water from flowing into the nozzle body (1) from the root pipe (3).

Even in water cannons that are exclusively used for water cannons, such as water cannons that can be switched between cannons and water sprays, water is pumped from a water source such as a fire hydrant to multiple water cannons. The water pressure is adjusted to be optimal when discharging water from all water cannons.

However, water may be sprayed from only some of the water cannons, and since the rotation of the water source pump is constant, water will be sprayed and the flow rate will be large. The problem is that it can get higher than when it is there, making it dangerous for firefighters.

In addition, for water cannons that can switch between rod-shaped water discharge and spray-like water discharge, when discharging water in the form of a spray, it is more efficient to increase the water discharge pressure in the nozzle body to form fine particles because they instantly vaporize. However, if the water discharge pressure is set to high pressure and water is discharged in a rod shape, the reaction force of the water discharge becomes large, which is dangerous. For this reason, in conventional water cannon guns, the diameter of the injection hole is made small, and the amount of water discharged from the rod-like water spray and the spray-like water spray is the same, so that the water spray reaction force does not become excessive.

However, when spraying water in the form of a stick, it is easier to extinguish a fire by spraying a large amount of water than when spraying water in the form of a spray.

Therefore, an object of the present invention is to provide a water cannon that does not cause a large water discharge reaction force even when a rod-shaped water discharge with a high water discharge pressure is performed.

In order to solve the above-mentioned problems, the first invention has a nozzle tip at the tip, an inflow hole at the rear lower part,
and a tubular nozzle body in which an annular valve seat is formed on the inner wall of the front edge of the inflow hole, and a poppet that is built into the rear part of the nozzle body and opens and closes the inflow hole by moving back and forth with a handle operation, A through hole is provided in the poppet, a second spool having an annular groove is slidably inserted into the through hole of the poppet, and a second compression spring is inserted between the nozzle body and the second spool. This is what I did.

A second aspect of the present invention provides a tubular nozzle body having a nozzle tip portion at the tip, an inflow hole at the rear lower part, and an annular valve seat formed on the inner wall of the front edge of the inflow hole. , a first spool that is built into the nozzle tip of the nozzle body and can be moved back and forth by external operation to switch between bar-shaped water spray and spray water; The poppet is provided with a through hole, and a second spool having an annular groove is slidably inserted into the through hole of the poppet, and the first spool and the first spool are connected to each other. When the second spool is connected mechanically or electrically to spray water, the gap between the valve seat and the annular groove of the second spool is maximized, and the nozzle body and the second spool are connected mechanically or electrically. A second compression spring is inserted between the spool and the spool.

1. By employing the above means, the second spool inserted into the through hole of the poppet moves forward or backward by the water discharge pressure in the nozzle body even if the water discharge amount changes, and the water discharge reaction force remains approximately constant. is maintained.

1. An embodiment of a water cannon exclusively for rod-shaped water spray according to the present invention is shown in FIG. 1, and an embodiment of a water cannon that can switch between rod-shaped water spray and spray-shaped water spray is shown in FIGS. 2 and 3. Explain with reference to.

Components that are the same as those described in the prior art are designated by the same reference numerals, and their explanation will be omitted.

In Figure 1, (4) is a through hole (4) in a conventional poppet.
a), and a spool (14) longer than the poppet (4) (hereinafter referred to as the second spool) (14) is slidably inserted into this through hole (4a). A position of the second spool (14) corresponding to the valve seat (1c) is reduced in diameter to form an annular groove (14a). A through hole (1d) is bored at the rear end of the nozzle body (1), and the shaft rod (1) at the end of the second spool (14) is inserted into this through hole (1d).
4C), and tighten the shaft rod (14c) of the second spool (14) on the outside of the rear end of the nozzle hole (1) with the nut (1
4b") and adjust it so that the second spool (14) does not move too far forward. (15) is the second spool (14).
A second compression spring is inserted between the rear end of the spool (14) and the end of the nozzle body (1).
) is set to retreat.

The water cannon exclusively for rod-shaped water cannon is constructed as described above, and its operation will be explained next.

Multiple water cannons are connected to a water source and the handle (5)
When you draw the poppet (4) as shown in the imaginary line,
) and the second spool (14) move backward in conjunction with the movement of the bottle (7), so that the pulp sea (lc) is inflow so that the most reduced diameter part of the annular groove (14a) corresponds to the pulp sea (lc). Hole (
2) opens. Therefore, since the distance between the annular groove (14a) and the valve seat (1c) is maximum, the maximum amount of water flows from the root pipe (3) into the nozzle body (1) and is discharged from the injection hole (1b). .

When the number of water cannons connected to the water source decreases, the water pressure increases, and accordingly, the water discharge pressure within the nozzle body (1) also increases. The rear end of the second spool (14)
The second spool (14) is slidably inserted into the poppet (4) in contact with the compression spring (15) of the second spool (14) as shown by the solid line when the water discharge pressure inside the nozzle body increases. moves backward against the compression force of the second compression spring (15). Then, the gap between the annular groove (14a) and the valve seat (lc) becomes narrower, and the water discharge pressure at the front of the valve seat (lc) decreases. This is because by reducing the flow area like a throttle mechanism, resistance is created in the pipe line to prevent water from entering the front part of the valve seat (1c).

When the handle (5) is released, the first compression spring (8) advances the poppet (4) and closes the inflow hole (2) to stop water discharge, and the second compression spring (15) advances the poppet (4) to stop the water discharge. The spool (14) is advanced to maintain a steady state.

Next, a water cannon that can switch between rod-shaped water spray and spray-like water spray will be described with reference to FIGS. 2 and 3.

The second spool (14) and the like are the same as the water cannon exclusively used for rod-shaped water cannon, so the explanation will be omitted. (16) is the second
A mechanical connection member, such as a wire cable, connects the front end of the spool (14) and the bottle (13) inserted into the first spool (10), so that when the first spool (10) moves forward, the second spool (10) The length is such that the diameter portion of the annular groove (14a) of the spool and the valve seat (1c) are pulled to corresponding positions. The inner diameter of the injection hole (1b) is larger than that of a conventional water cannon that can switch between a rod-shaped water spray and a spray water spray, so that a rod-shaped water spray can be performed with a large amount of water. The rest is the same as the conventional technology.

Next, the operation of spraying water will be explained with reference to FIG. 3.

The first spool (10) moves forward until the spray water nozzle tip (10a) and the nozzle tip (1a) of the nozzle body (1) come into close contact, and the hole (10c) of the first spool (10) is located at a position offset from the ribbed guide (1)). On the other hand, the second spool (14) has an annular groove (14
The most reduced diameter part in a) is located at a position corresponding to the valve seat (lc), and is in a state where the largest amount of water flows into the nozzle body (1). When the handle (5) is pulled, the second spool (14) remains in a steady position and the poppet (4)
The chisel retreats against the compression force of the first compression spring (8), and the inflow hole (2) opens as shown in Figure 3 (.Then, water flows from the base pipe (3) to the inflow hole (2). At this time, the distance between the annular groove (14a) and the valve seat (lc) is the largest, and the largest amount of water flows into the nozzle body (1). The water inside becomes high pressure, and the water inside the cavity (10b) of the nozzle tip for spraying water becomes high pressure.
), passes through the end layer groove carved in the screen (1)), becomes a swirling flow, and high-pressure spray is discharged from the injection hole (1b).

Next, the operation of the rod-shaped water spray will be explained with reference to FIG. The grip (9) is reversed and the bottle (13) is rotated to retract the first spool (10). Therefore, the spray water nozzle tip (10a) is separated from the inner wall of the nozzle tip (1a) of the nozzle body (1), and the nozzle tip (10a) of the nozzle body (
1) The water that has flowed into the chamber is directly discharged from the injection hole (1b) in the form of a rod. In this embodiment, since the inner diameter of the injection hole (1b) is larger than the conventional one, a large amount of water can be sprayed. However, even if the amount of water discharge increases, the water discharge pressure within the nozzle body (1) does not become high and the water discharge reaction force does not increase. As explained in the water cannon dedicated to rod-shaped water cannon, when the water discharge pressure inside the nozzle body (1) becomes high pressure, the second spool (14) retreats against the compression force of the second compression spring (15). However, the distance between the annular groove (14a) of the second spool and the valve seat (1c) narrows, and the water discharge pressure at the front of the valve seat (lc) decreases. The water discharge reaction force R is R = -Q-j"'i" (K: constant,
Q: water discharge amount, P: water discharge pressure), so the water discharge amount Q
Since the water discharge pressure P is reduced even if the water discharge pressure P becomes large, the water discharge reaction force is the same as that of the conventional method, and a large amount of water can be discharged in a rod shape.

Furthermore, in order to spray water, the grip (9) is turned half a turn to bring the spray water nozzle tip (10a) into close contact with the inner wall of the nozzle tip portion (1a) of the nozzle body (1). The spool (14) is pulled by the wire rope (16) and advances further than when discharging water in the form of a bar, and as shown in FIG.
a) and the valve seat (lc) are positioned at a maximum, so that the maximum amount of water flows into the nozzle body (1) from the inflow hole (2). Therefore, it becomes possible to spray water at high pressure.

Note that water cannons can be used not only for extinguishing fires, but also for agricultural work and the like.

According to the present invention, even if the water discharge pressure increases, the water discharge reaction force does not increase, so that it is possible to safely perform rod-shaped water discharge with a large amount of water.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a water cannon exclusively for rod-shaped water cannon according to the present invention;
FIGS. 2 and 3 are cross-sectional views of a water cannon switchable between rod-shaped water discharge and spray-like water discharge according to an embodiment of the present invention when discharging rod-shaped water and when discharging water in the form of a spray. FIG. 4 is a sectional view of a conventional water cannon exclusively for rod-shaped water spray, and FIG. 5 is a conventional water cannon that can be switched between rod-shaped water spray and spray water spray. (1) - nozzle body, (la) - nozzle tip, (lb) - injection hole, (lc) - valve seat, (2) - flow hole, (3') - root part vibe,
(4) -Poppet, (4a) -Through hole, (5)
- Handle, (9) - First spool, (9a
) - - Spray water nozzle tip, (14) - second spool, (14a) - - annular groove,

Claims (2)

[Claims] (1) A tubular nozzle body having a nozzle tip at the tip, an inflow hole at the lower rear, and an annular valve seat formed on the inner wall of the front edge of the inflow hole, and a rear part of the nozzle body. The poppet is built into the poppet and opens and closes the inflow hole by moving back and forth by operating a handle, the poppet is provided with a through hole, and a second spool having an annular groove is slidably inserted into the through hole of the poppet. A water cannon, characterized in that a second compression spring is inserted between the nozzle body and the second spool. (2) A tubular nozzle body having a nozzle tip portion at the tip, an inflow hole at the rear lower part, and an annular valve seat formed on the inner wall of the front edge of the inflow hole, and a nozzle of the nozzle body. The first part is built into the tip and can be moved back and forth by external operation to switch between rod-shaped water spray and spray-like water spray.
spool and is built into the rear of the nozzle body above.
The poppet comprises a poppet that opens and closes the inflow hole by moving back and forth with a handle operation, a through hole is provided in the poppet, a second spool having an annular groove is slidably inserted into the through hole of the poppet, and the first spool is slidably inserted into the poppet. The spool and the second spool are connected mechanically or electrically to maximize the gap between the valve seat and the annular groove of the second spool when spraying water, and the nozzle body A water cannon, characterized in that a second compression spring is inserted between the spool and the second spool.