JPH0527948Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial field of application] This invention relates to a valve opening device that is linked to the hose hanging arm of a fire hydrant, and is installed by embedding the storage box of the fire hydrant unit into the wall of a passageway in a building. Used for fire hydrants.

[Conventional technology]

In order to open such a fire hydrant, conventionally, the unit is equipped with a switch that operates the electric valve, and when a fire occurs, the switch is pushed to open the electric valve, or the valve lever is turned to open the electric valve manually. It is common to open the valve.

[Problems that this invention aims to solve]

Among the conventional valve opening methods mentioned above, when opening the valve using an electric valve, if a power outage occurs at the same time as a fire, the valve cannot be opened at all, and it is impossible to extinguish the fire with water using a fire hydrant. There was a problem with becoming. In addition, when manually opening the valve by turning the valve lever, the lever is usually short because there is not enough space inside the fire hydrant box, so it takes a considerable amount of time to turn it. There is a problem that requires a lot of strength.

[Means for solving problems]

This proposal solves the above problems, and
In a fire hydrant in which one end of a hose holder is rotatably pivoted to the rear plate of a fire hydrant box, a ball valve that is closed when the lever is in the same direction as the flow path of the valve is placed horizontally below the hose holder. A trochanter is pivotally attached to a support shaft protruding from the lever, and the trochanter is brought into contact with the front surface of the lower arm of the hose holder, and the lever is rotated by rotation of the hose holder to open the valve. It is characterized by

[Effect]

In the present device, under normal conditions, the canvas hose is hung in a folded state on the rod of the hose rack, and the rib or flange at the mouth end of the water discharge nozzle is engaged with the semicircular part of the hanger, and the hose is hung. A long rod for engagement is placed and supported on the latching part, and the trochanter of the support shaft protruding from the lever is in contact with the front surface of the lower arm of the hose rack.
Since the lever is located in the same direction as the flow path direction of the ball valve, the valve is not opened.

In the event of a fire, open the door of the fire hydrant box and rotate the hanger outward to remove the water nozzle. At the same time, the engagement rod loses its support, causing the shaft to rotate downward due to the weight of the canvas hose. The hose that had been suspended was thrown onto the floor.
At this stage, the ball valve is not yet opened, so water does not flow into the hose, and the hose can be thrown out without any problem.

Next, when the hose rack is pulled out and rotated forward using the pivot shaft as a fulcrum, the trochanter pressed by the lower arm rolls and the lever opens in the valve opening direction, and during this rotation, the lower arm The contacting limit switch starts the water pump and opens the ball valve body of the ball valve.

After extinguishing the fire with water, when the hose holder is returned to its original position, if the lower arm is U-shaped as shown in the embodiment shown in FIG. If the lever is L-shaped or prismatic, the lever will not work and water will continue to be released.
The lever is manually turned to close the valve.

〔Example〕

The drawings show an embodiment of the present invention, and the present invention will be specifically described below.

In Fig. 1, 1 is a fire hydrant box, 2 is a hose rack, and upper and lower arms 3, 4 and a mounting plate 5 are rotatably connected to a pivot shaft 6, and this mounting plate 5 is attached to the rear of the box. The hose holder 2 is fixedly attached to the plate 1a to support the hose holder 2, and the other end of the hose holder 2 has a semicircular tip inside and a latching portion 7a with the edge slightly extended. A hanger 7 of a water spray nozzle provided in is rotatably mounted on a shaft 8. Further, a shaft rod 9 is pivotally connected between the upper and lower arms 3 and 4 in the same direction as the hose rack 2, and a canvas hose suspension rod 10 is fixed in a comb shape at appropriate intervals on the front side of the rod 9. The rod 10a adjacent to the hanger 7 is formed longer than the other rods so that it can be placed on and engaged with the latching portion 7a of the hanger 7.

The device of the present invention is a fire hydrant with the above configuration,
A ball valve 12 that closes when the lever 11 is in the same position as the flow path direction of the valve is fixed to a mounting plate 13 and attached to the rear plate 1a of the box below the hose holder 2, and is provided protruding from the lever 11. A trochanter 15 is pivotally attached to the support shaft 14 and is brought into contact with the front side of the lower arm 4 of the hose holder 2.

The lower arm 4 may be formed into a prismatic shape with the trochanter 15 in contact with the front side thereof, or may be formed into an L-shaped cross section as shown in the second figure, or a U-shape in cross section as shown in the third figure. In the case of a U-shape, the trochanter 15 is inserted therein.

In the above, the degree of opening of the hose holder 2 for opening the ball valve 12 varies depending on the distance from the perpendicular to the pivot shaft 6 to the installation position of the ball valve 12 and the length of the lever 11. Since these are determined, the installation position of the ball valve 12 is determined by taking these into consideration.

In the figure, reference numeral 16 indicates a limit switch for starting the water pump installed at the rotating position of the lower arm 4, reference numeral 17 indicates a water supply pipe on the inflow side, and reference numeral 18 indicates a water supply pipe on the outflow side, which are connected to the canvas hose.

In the above-described device, under the normal condition shown in the first figure, the canvas hose is hung from the rod 10 in a folded state, and the mouth end of the water nozzle (indicated by the two-dot chain line in the figure) is attached to the semicircular part of the hanger 7. The rod 10a is suspended by engaging the ribs or the flange, and the rod 10a is placed and supported on the hooking portion 7a. In this state, since the lever 11 is located in the same direction as the flow path direction of the ball valve 12, the valve is not opened.

In the event of a fire, open the door (not shown) and
When the hanger 7 is rotated in the outward direction of the arrow A in FIG.
Since a loses support, the shaft 9 rotates downward as shown by arrow B in the figure due to the weight of the canvas hose, and the hung hose is thrown onto the floor. At this stage, the ball valve 12 is not yet opened, so water does not flow into the hose, and the hose can be thrown out without any problem.

Next, when the hose holder 2 is pulled out and rotated using the pivot shaft 6 as a fulcrum in the front direction of the arrow C in the same figure, the trochanter pressed by the lower arm 4 rolls and moves the lever as shown in FIG. 11 opens in the valve opening direction, and during this rotation, the limit switch 16 in contact with the lower arm 4 starts the water pump, and the ball valve body 12a of the ball valve 12 opens.

After water spraying is finished, when the hose holder 2 is returned to its original position, if the lower arm 4 is U-shaped, the lever 11 will move in conjunction with it, so the valve will close, but if the lower arm 4 is prismatic or L-shaped, the valve will close. If there is, the lever 11 will not operate as shown in FIG. 2(), so the lever 11 will be turned manually to close the valve.

〔effect〕

As mentioned above, according to the present invention, a ball valve that is closed when the lever is in the same direction as the flow path of the valve is arranged in the same direction as the hose mounting, and the trochanter pivoted on the shaft of the lever is arranged. The valve is opened by the rotation of the lower arm of the hose holder, so in the event of a fire, the water nozzle can be removed, the hose thrown out, and the hose holder can be rotated to prevent a power outage. This has the effect of allowing the valve to be opened with a light force, regardless of the In addition, if the lower arm is prismatic or L-shaped, even if it is returned to its original position, the lever remains in the open position and water continues to be sprayed, so the hose holder protrudes from the front of the box, making it easier to extinguish fires. It has the advantage of not getting in the way.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the proposed device, Fig. 2 is a sectional view showing the relationship between the lower arm and the support shaft of the lever, Fig. 3 is a sectional view of another embodiment of the lower arm, and Fig. 4 is a ball valve. FIG. 5 is a central longitudinal sectional view of the valve in the closed state, and FIG. 5 is an explanatory diagram of the operating state. 1... Fire hydrant box, 1a... Rear plate, 2... Hose mount, 4... Lower arm, 11... Lever, 12
... Ball valve, 14 ... Support shaft, 15 ... Trochanter.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A fire hydrant in which one end of a hose is rotatably attached to the rear plate of a fire hydrant box, and a ball that closes when the lever is in the same direction as the flow path of the valve. A valve is installed horizontally below the hose holder, and the trochanter is pivotally attached to a support shaft protruding from the lever so that it comes into contact with the front surface of the lower arm of the hose holder, and when the hose holder rotates, the lever is rotated. A manual valve opening device for a fire hydrant, characterized in that the valve is opened by rotating the valve. (2) The manual valve opening device for a fire hydrant according to claim 1, wherein the lower arm has an L-shaped cross section. (3) The manual valve opening device for a fire hydrant according to claim 1, wherein the lower arm has a U-shaped cross section and the trochanter is inserted therein.