JPH0423568Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is installed near an object to be extinguished, such as a fuel tank, and directs pressurized water or extinguishing liquid to the point of fire by rotating the nozzle up and down and left and right. It is related to fire extinguishing guns that emit fire.

Conventionally, in this type of fire extinguishing gun, an inner cylinder connected to a supply source of extinguishing agent and fitted into an outer cylinder, which is a fixed side member, is erected, and is rotated from side to side by a rotation drive mechanism. The nozzle body, fitted with its rotating base so that it can be rotated upward and downward, is moved up and down by the drive mechanism for upward and downward rotation, into the direction changing cylinder section that changes the upward discharge flow of extinguishing agent in the inner cylinder to the horizontal direction. It is known that the extinguishing agent discharged from the nozzle body can be controlled in a desired direction by tilting and rotating the nozzle body. Furthermore, in order to maintain sufficient discharge pressure, fire extinguishing guns are installed near the vicinity of the fuel tank and at a slightly higher position. In order for the nozzle body to be able to face each flame point, it is necessary to devise a modification to the direction changing cylinder part that supports the nozzle body, and it is necessary to simply extend this direction changing cylinder part from the outer cylinder. However, if the direction-changing cylinder part is attached to the outer cylinder, the bending moment due to its own weight and discharge reaction force acting on the mounting base of the direction-changing cylinder part to the outer cylinder will be smaller than the overhang length. Since the size increases in proportion to the size, there is a problem that the mounting base becomes weak.

In addition, in the conventional fire extinguishing gun, since the above-mentioned rotation drive mechanism and elevation rotation drive mechanism are advantageous in preventing the nozzle body etc. from moving accidentally due to its own weight, a worm wheel provided on the inner cylinder nozzle body on the side to be rotated is used. A worm wheel that meshes with a worm driven by a rotary prime mover such as a hydraulic motor is widely used, but two or three teeth of the worm wheel are connected to one of the two or three threads on the worm.
Since it only engages with the nozzle body, the engagement area is small and the surface pressure on the engagement part tends to be large.Especially in the elevation/rotation drive mechanism, a large bending moment acts on the engagement part through the nozzle body as mentioned above. Therefore, the frictional force on the meshing surfaces increases, and the torque required to rotate the worm wheel increases.
A large amount of force is required for the tilting operation, making it difficult to make fine adjustment rotations.As a result, it is difficult to match the discharge direction of the extinguishing agent with the fire point by finely tilting the nozzle body. This is difficult, and in order to finely and smoothly perform this adjusting rotation, a large-diameter worm wheel with a large meshing reduction ratio must be used, resulting in problems such as the overall size of the fire extinguisher gun.

This invention aims to solve these problems seen in conventional fire extinguishing guns, and its structure is such that an outer cylinder, which is installed upright as a fixed side member, communicates with a supply source of extinguishing agent. an inner cylinder fitted into the outer cylinder so as to be able to rotate around its cylinder center; a rotation drive mechanism provided to perform the above-mentioned rotation operation of the inner cylinder;
A direction changing cylinder part is formed in communication with the discharge side of the inner cylinder and is attached to the outer cylinder to change the direction of the discharge flow laterally, and the rotation base thereof is connected to the discharge side of the direction changing cylinder part and fitted. In a fire extinguishing gun consisting of a nozzle body formed to be able to be tilted up and down, and an up-and-down rotation mechanism that controls the up-and-down rotation of the nozzle body, the direction changing cylinder portion is oriented diagonally upward with respect to a horizontal plane when viewed from the side. The above-mentioned elevation and rotation drive mechanism is formed by a screw mechanism that connects the output side member near the rotation base of the nozzle body, and a rotation prime mover for driving this screw mechanism. This is a fire extinguishing gun characterized by the fact that the direction changing cylinder part having an upward elevation angle in this way reduces the bending moment that acts on the swing drive mechanism, that is, the dead weight of the nozzle body, etc. This angle of elevation makes it possible to reduce the large bending moment generated by the combined forces of the extinguishing agent release reaction force and the elongation length, and the screw mechanism reduces the rotational force to a small degree. Therefore, it has been devised so that the elevation and rotation can be finely adjusted and the direction in which the fire extinguishing agent is released can be easily and quickly matched to the fire point.

Next, an example of a specific structure of this invention will be explained based on the drawings. Fig. 1 shows a partially cutaway front view of the fire extinguisher gun, Fig. 2 shows a partially cutaway front view, and Fig. 3 shows a partially cutaway plan view of the elevation/rotation drive mechanism. An inner cylinder 2, which is connected to an extinguishing agent supply source composed of a pump, a supply pipe, etc. (not shown), can be rotated around the center of the cylinder in an outer cylinder 1, which is vertically installed as a member. A worm 5, which is rotatably supported by a bearing body 4 attached to the outer cylinder 1, is inserted into the worm wheel 3, which is fitted into the inner cylinder 2 and is directly gear-cut into the inner cylinder 2, through the notch hole 1a of the outer cylinder 1. A turning drive mechanism 7 is configured in which the worm 5 and the worm wheel 3 are driven by a turning prime mover 6 which is attached to a bearing body 4 and driven by oil pressure, pneumatic pressure, electricity or the like. In the illustrated example, the direction changing cylinder part 8 that changes the discharge flow of the inner cylinder 2 in the lateral direction includes a conduit 9 that is approximately L-shaped when viewed from the front;
The conduit 10 is attached to the discharge side end of the pipe 10 and has an upward elevation angle α with respect to the horizontal plane as shown in FIG. 2 when viewed from the side, and is approximately U-shaped when viewed from above.
That is, the conduit 9 attached to the upper end of the outer cylinder 1 is connected to the inner cylinder 2.
The fire extinguishing agent discharged from the inner cylinder 2 in a substantially vertical direction is changed into a substantially right-angled direction through a conduit 9 and a U-turn through a conduit 10. be.

The rotating base 12 of the nozzle body 11 is fitted to the discharge side of the direction changing cylinder part 8 so that the nozzle body 11 can move up and down. The nozzle body 11 in the illustrated example is divided into a nozzle connecting tube 13 having a rotating base 12 and a nozzle 14 . The elevation rotation driving mechanism 15 for controlling the elevation rotation of the nozzle body 11 drives the screw mechanism 17 that connects the output side member 16 to the vicinity of the rotation base 12 of the nozzle body 11 and the screw mechanism 17. The illustrated screw mechanism 17 includes a female threaded body 21 rotatably provided via a bearing 20 on a bearing body 19 attached to the conduit 9, and a female threaded body 21. It consists of a long male threaded body 22 that is screwed into the body 21, and a link 24 that connects the male threaded body 22 and an arm 23 protruding from the rotation base 12, and prevents the rotation of the female threaded body 21. The nozzle body 1 is
It is transmitted as a tilting motion of 1. The illustrated rotary motor 18 is driven by hydraulic pressure, pneumatic pressure, electricity, etc., and the gear 26 attached to the bearing body 19 and attached to the drive shaft 25 is rotated as shown in FIG. It meshes with a gear 27 provided on the female screw body 21.

In the illustrated screw mechanism 17, the female screw body 2
1 rotates, and the male screw body 22 moves back and forth, but if this screwing relationship is reversed, that is,
Although not shown, a male threaded body is rotatably provided on the bearing body 19 using a bearing, and a female threaded body is screwed onto the male threaded body and connected to the rotating base 1 through an appropriate link.
It may be a screw mechanism connected to the second arm 23. Alternatively, instead of using the link 24 in the illustrated example, a vertically long long groove is provided in the male threaded body 22 on the side closer to the arm 23, and the pin implanted in the arm 23 is loosely fitted into this long groove. The output side member 16 may be composed of only the body 22.

The illustrated turning prime mover 6 and rotary prime mover 18 are both hydraulic motors that supply pressure oil from an oil pump (not shown) to, for example, an oil pipe 2 through a control electromagnetic field.
8 to the swinging motor 6 and returned to the tank via an oil pipe 29. Pressure oil to the rotary motor 18 is supplied from an oil pipe 30 and an oil pipe 31 to connection ports 32, 32 provided in the outer cylinder 1. Annular groove 3 provided in inner cylinder 2
3 and 33 are connected to each other, and the annular grooves 33 and 33 are connected to the guide holes 34 and 34 of the inner cylinder 2.
The rotary motor 18 is connected to the rotary motor 18 via an oil pipe 35 and an oil pipe 36.
is connected to. Further, pressure oil for controlling opening and closing of a flapper (not shown) provided as needed at the tip of the nozzle 14 is supplied and discharged through an oil pipe 37 and an oil pipe 38.

The worm 5 of the turning drive mechanism 7 is provided with a handle 39 for manual operation, and the elevation and rotation drive mechanism 1 is provided with a handle 39 for manual operation.
A handle 40 for manual operation is attached to each of the male screw bodies 22 of No. 5. The male screw body 22 and the female screw body 21 are covered with a dustproof bellows 41,
Balls 42 are used to smooth the rotation of the inner cylinder 2 fitted to the outer cylinder 1 and the rotating base 12 fitted to the conduit 10, and to prevent movement in the longitudinal direction of the cylinder. There is.

Next, to explain the operation, when the control solenoid valve (not shown) is operated and pressure oil flows into the oil pipes 28 and 29, the swing motor 6 is activated and the worm 5 and worm wheel 3 are rotated. Since it moves, the inner cylinder 2
As a result, the direction changing cylinder portion 8 and the nozzle body 11 also rotate in a substantially horizontal plane, so that the nozzle body 11 is directed toward the fire point. Also, oil pipe 30, oil pipe 31
When pressure oil flows into the rotating base 1, the rotating prime mover 18 operates and the gears 26, 27 and the female threaded body 21 rotate, and when the male threaded body 22 moves forward, the nozzle body 11 moves toward the rotating base 1.
When the threaded body 22 moves backward, the nozzle body 11 rotates upward, and the extinguishing agent discharged from the nozzle body 11 reaches the exact point of fire. It will be poured into. The extinguishing agent introduced into the inner cylinder 2 from a supply source of extinguishing agent such as a pump is changed to a discharge direction approximately perpendicularly by a conduit 9, and further changed to a lateral direction by a conduit 10. The fuel is then discharged from the nozzle body 11 toward the fire point.

The fire extinguishing gun according to this invention is configured as described above, and the direction changing cylinder part 8 supporting the nozzle body 11 is configured in a shape having an elevation angle α diagonally upward with respect to the horizontal plane when viewed from the side. In addition, since the elevation and rotation drive mechanism 15 equipped with a screw mechanism is arranged in the space created between the nozzle body 11 and the head of the conduit 9 due to the provision of the elevation angle α, the following effects can be obtained. occurs.

Compared to the case where the direction changing part is bent at right angles, the extinguishing agent flows more smoothly, reducing pressure loss, and the discharge distance is longer, ensuring extinguishing action against fire points further away. You can get a gun.

Since the height is lower than when the elevation angle α is 90°, the bending moment applied to the swing drive mechanism 7 due to the extinguishing agent discharge reaction force acting on the nozzle body 11 is reduced, As a result, the turning operation becomes light and the nozzle body 11 can be easily aligned with the fire point. Furthermore, for example, the outer cylinder 1 and the inner cylinder
You will get a fire extinguisher gun that can be made into thin meat.

Since the direction changing cylinder part 8 overhangs from the outer cylinder 1 at the elevation angle α, even if the overhanging distance is shorter than when the elevation angle α is 0°, the turning operation handle does not interfere with the hydraulic motor, etc. A small fire extinguishing gun is obtained in which the nozzle body 11 can be directed near the foot of the outer cylinder 1 as a fixed side member, and the fire extinguishing agent can be discharged toward the fire point near the foot.

Nozzle body 1 caused by providing elevation angle α
Since the elevation/rotation drive mechanism 15 equipped with a screw mechanism is provided in the space between the head of the conduit 9 and the head of the conduit 9, a small and short fire extinguishing gun can be obtained as a whole.

Elevation/elevation/rotation drive mechanism 15 equipped with a screw mechanism
shows a screw mechanism 17 connecting the output side member 16 to the vicinity of the rotation base 12 of the nozzle body 11, and a rotating prime mover 1 for driving the screw mechanism 17.
8, a large bending moment due to the weight of the nozzle body 11 etc. supported in an overhanging manner with respect to the direction changing cylinder portion 8 will not act on the threaded portion of the screw mechanism 17. However, since the above acting force is borne on all surfaces of the male and female threads of the number of threads involved in screwing, the screwing area is sufficiently large and the surface pressure per unit area is becomes smaller, and the frictional force on the threaded surface also becomes smaller.
The torque required to rotate the nozzle body 7 and the nozzle body 11 is reduced, and a fire extinguishing gun can be obtained in which the force required to tilt and rotate the nozzle body 11 is small.

In a worm gear that directly drives the nozzle body, the load of the drive part is also applied to the nozzle body, so it must be constructed of a thick wall such as a cylinder. Since the burden is only borne by the conduit 9, a small fire extinguishing gun that rotates smoothly can be obtained.

[Brief explanation of drawings]

The figure shows one embodiment of this invention.
2 is a partially cutaway front view of the fire extinguishing gun, FIG. 2 is a partially cutaway side view thereof, and FIG. 3 is a partially cutaway plan view of the elevation/rotation drive mechanism. Description of symbols, 1...Outer cylinder, 1a...Notch hole, 2...
...Inner cylinder, 3...Worm wheel, 4,19...
Bearing body, 5... Worm, 6... Rotating prime mover,
7... Turning drive mechanism, 8... Direction changing cylinder section,
9, 10... conduit, 11... nozzle body, 12...
Rotation base, 13... Nozzle connection tube, 14... Nozzle, 15... Drive mechanism for elevation and rotation, 16... Output side member, 17... Screw mechanism, 18... Rotating prime mover, 20... Bearing, 21 ...Female threaded body, 2
2...Male thread body, 23...Arm, 24...Link, 25...Drive shaft, 26, 27...Gear, 2
8, 29, 30, 31, 35, 36, 37, 38
... Oil pipe, 32 ... Connection port, 33 ... Annular groove, 3
4... Guide hole, 39, 40... Handle, 41...
Bellows, 42...Ball, α...Angle of elevation.

Claims (1)

[Scope of utility model registration request] An outer cylinder that is erected as a fixed side member, an inner cylinder that is connected to a supply source of extinguishing agent and is fitted into the outer cylinder so as to be able to rotate about its cylinder center, and the above-mentioned turning operation of the inner cylinder. a turning drive mechanism provided to perform the rotation; a direction changing cylinder part connected to the discharge side of the inner cylinder and attached to the outer cylinder to change the direction of the discharge flow laterally;
A fire extinguishing gun consisting of a nozzle body that is fitted to the discharge side of a direction changing cylinder part with its rotation base in communication so that it can be rotated up and down, and an up and down rotation mechanism that controls the up and down rotation of the nozzle body. In the above, the direction changing cylinder part has a shape having an elevation angle diagonally upward with respect to a horizontal plane when viewed from the side, and the elevating and elevating rotation drive mechanism is connected to an output side member near a rotation base of the nozzle body. A fire extinguisher gun comprising a screw mechanism and a rotary motor for driving the screw mechanism.