JPS6143012Y2 - - Google Patents

Description

[Detailed description of the invention] In order to limit the pressure of fire extinguishing water sent to each floor from the rooftop water tank of a high-rise building, this invention is attached to the indoor fire hydrant on each floor and adjusts the water pressure in two stages. Regarding pressure reduction regulating valves.

Discharging water from indoor fire hydrants is extremely important in the initial extinguishment of fires in high-rise buildings, but because the height difference from the rooftop water tank to each floor is extremely different, there is a risk that unexpected accidents may occur due to water pressure. However, conventional piping methods only provide pressure relief valves at several locations within a building, and during actual work, there is a risk that a large amount of water will flow out to the drain side and the fire will not be extinguished.

A particular object of the present invention is to provide a pressure reduction regulating valve that can be incorporated into an indoor fire hydrant on each floor to supply a large flow of water at reduced pressure. Embodiments of the present invention will be described below with reference to the drawings.

The pressure reduction regulating valve according to the present invention is composed of a bottom wall 2 having a fire hydrant mounting thread extending vertically downward, a side wall 3 having a hose fitting mounting thread extending horizontally, and a valve wall 4. An automatic adjustment cylinder 6 is placed upside down on the bottom wall 2 inside the valve box 1 to which the reservoir port 5 is connected to the water inlet side, and its peripheral wall 7 is connected to the side wall 3 of the valve box 1.
The valve box 1 is divided into an adjustment chamber 9 and a spring chamber 10 by a ceiling wall 8. In addition, outflow holes 11 and 12 having approximately the same shape are bored at the position where the peripheral wall 7 and the side wall 3 on the side of the reservoir 5 come into contact,
Further, the lower end 16 of the operating valve stem 15 inserted into the valve box 1 through the insertion holes 13 and 14 bored in the center of the valve cover 4 and the ceiling wall 8 is engaged in the receiving part 18 of the valve body 17. The valve stem 15 can be rotated in the receiving part 18 with the rotation of a handle 19 attached to the upper end of the valve stem 15. Further, a support rod 20 passing through a seat gasket 21 that serves as a lower support for the valve body 17 is tightened with a bolt 22 at its lower end. In addition, the side surface 23 of the seat packing 21 forms a press-fit hole 24 formed in the center of the bottom wall 2.
so that it can be fitted to the inner edge 25 of. At the same time, in the spring chamber 10, recesses 26, 26 are provided around the valve stem 15 in the valve cover 4 and the ceiling wall 8 so as to face each other vertically.
A spring 27 is disposed between the recesses 26, 26, and a spring 29 is disposed between the upper and lower step portions 28, 28 stepped on the outside of the recesses 26, 26, with a gap at the end. Further, the lower end 30 of the valve cover 4 screwed inside the upper part of the side wall 3 is attached to the side wall 3.
The outer upper end portion 31 of the ceiling wall 8 which is in sliding contact with the upper end portion 31 of the ceiling wall 8 can be vertically opposed to the upper outer end portion 31 of the ceiling wall 8.

In the figure, 32 is an inflow pipe, 33 is a hose connection port, and 34 is a sand removal hole bored at the lower end of the side wall 3.

Since the embodiment of the pressure reducing regulating valve according to the present invention is as described above, the fire extinguishing water that has flowed into the regulating chamber 9 through the press-in hole 24 on the inflow pipe 32 side can be When the gas is circulated and filled, an outflow hole 11 of the same shape is formed in contact with symmetrical positions of both the peripheral wall 7 of the adjustment cylinder 6 and the side wall 3 of the valve box 1.
and 12, as shown in FIG. 2 when viewed from the water spout side A-A, open the holes together and accumulate in the reservoir port 5 on the water spout side from the adjustment chamber 9 in the adjustment cylinder 6, thereby controlling the fluid force and direction. The water discharged after adjusting the pressure is not subject to any restriction as long as the pressure is low, and therefore, the amount of water discharged and the water pressure are maintained at a certain limit. After that, the amount of water pressurized into the adjustment chamber 9 through the press-in hole 24 increases and water pressure is also applied, so the water pushes up the ceiling wall 8 and the peripheral wall 7 also automatically rises by the pushing width A, while the side wall 3 remains unchanged. Since it is fixed, the outflow hole 12 is closed by the peripheral wall 7 by the push-up width A, as shown in FIG.

In addition, the outflow holes 11 of the adjusting cylinder peripheral wall 7 also rise by the push-up width A, and are locally blocked by the valve body side wall 3 by that width, and as a result, both outflow holes 1
As shown in FIG. 4 when viewed from the water discharge side B-B, the opening width of the irrigation water passing through the drains 1 and 12 is narrowed by the above-mentioned push-up width A. Therefore, the amount and pressure of water flowing into the reservoir 5 are reduced, and the amount and pressure of water discharged can be automatically adjusted within predetermined limits.

When the ceiling wall 8 of the adjustment cylinder 6 is pushed up to increase the amount of inflow water as described above, the first spring in the spring chamber 10 is elastically installed between the recesses 26 and 26 near the valve stem 15. 27 gives elasticity to the upward movement of the ceiling wall 8 and controls this, thereby facilitating automatic adjustment of the amount of water discharged from the outflow holes 11 and 12. In addition, if the amount and water pressure of the water that has flowed into the adjustment tube 6 further increases and the degree of rise due to the upward movement of the ceiling wall 8 is added, and the spring 27 becomes unable to control the water, the outside of the recesses 26, 26 A spring 29 provided with a gap between the step portions 28 provides a restriction.

Further, in the spring chamber 10, the lower end 30 of the valve cover 4 screwed inside the upper part of the side wall 3 and the outer upper end 31 of the ceiling wall 8 that slides in contact with the side wall 3 in the spring chamber 10 are vertically opposed to each other. If the amount of water flowing into the adjustment chamber 10 increases so much that even the elasticity of the springs 27 and 29 cannot cope with the upward movement of the ceiling wall 8, the above-mentioned upper end portion 31 rises and comes into contact with the lower end 30 of the valve lid 4 facing above and is restrained. Not only when the amount of water flows suddenly as described above, but also when the water pressure increases dramatically and the ceiling wall 8 is pushed up significantly, the elastic force of the springs 27 and 29 can also be used to cope with the situation. First, if the push-up width exceeds the above-mentioned A, the mutual restraining force caused by the abutment of the upper and lower ends 30 and 31 prevents the ceiling wall 8 from being pushed up and stops, thus preventing the outflow. The amount of water discharged from the holes 11 and 12 and the water pressure can be automatically controlled and adjusted within necessary limits.

In addition, when stopping the flow of water into the adjustment chamber 9, rotate the handle 19 and open the insertion hole 13 of the valve cover 4.
The valve stem 15 is inserted through the insertion hole 14 in the ceiling wall 8 and pressed down together with the valve body 17 to fit into the inner edge 25 of the press-fit hole 24 bored in the side surface 23 of the seat packing 21 and the center of the bottom wall 2. The press-in hole 24 is sealed, and the flow of water into the adjustment chamber is completely stopped.

Due to its compact shape, the depressurization regulating valve of this invention can be easily incorporated as part of an indoor fire hydrant, and since it does not require a restrictor in the water flow path except when it is closed, it has low flow resistance and is suitable for large flow rates. Its practical value as a piping component for fire extinguishing in high-rise buildings is remarkable.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view showing an embodiment of the pressure reducing regulating valve according to the present invention, Fig. 2 is a front view of the side wall of the valve box seen from the water discharge side A-A when the regulating cylinder is stationary, and Fig. 3 is a front view of the valve box side wall when the regulating cylinder is stationary. A partial cross-sectional view showing the opening state of the outflow hole at the time of pushing up, FIG. 4 is the water discharge side B-B at the time of pushing up.
A front view of the side of the valve box as seen from the front. 1...Valve box, 2...Bottom wall, 3...Side wall, 4...
Valve lid, 6...Automatic adjustment tube, 7...Peripheral wall, 8...Ceiling wall, 9...Adjustment chamber, 10...Spring chamber, 11, 1
2... Outlet hole, 15... Valve stem, 17... Valve body, 1
9...Handle, 24...Press-fit hole, 26, 28...
... recess, 27, 29... spring.

Claims (1)

[Scope of utility model registration request] A bottom wall 2, which is a pressure reducing adjustment valve that is attached to an indoor fire hydrant and adjusts water pressure in two stages, and has a fire hydrant mounting thread extending vertically downward;
A self-adjusting cylinder 6 is placed upside down on a bottom wall 2 inside a valve box 1 consisting of a side wall 3 having a horizontally extending threaded portion for attaching a hose fitting, and a valve lid 4, and its peripheral wall 7 is The valve box 1 is slidably contacted with the inside of the side wall 3 of the threaded portion for attaching the hose fitting of the valve box 1 in a vertically sliding manner, and the ceiling wall 8 divides the valve box 1 into an adjustment chamber 9 and a spring chamber 10, and a peripheral wall on the spout side. The lower end 16 of the operating valve stem 15 is inserted into the valve box 1 from the center of the valve cover 4 and the ceiling wall 8, and has flow holes 11 and 12 formed in the same manner at the positions where the valve stems 7 and 7 come into contact with each other. The side surface 23 of the seat packing 21 that is engaged in the receiving portion 18 of the valve body 17 and serves as a lower support for the valve body 17 can be fitted into the inner edge 25 of the press-fit hole 24 bored in the center of the bottom wall 2. At the same time, in the spring chamber 10, the spring 27 is inserted between the recesses 26, 26, which are vertically opposed around the valve stem 15 and recessed in the valve cover 4 and the ceiling wall 8.
A spring 29 is provided between the step portions 28 and 28 stepped on the outside of the valves 6 and 26 with a gap at the end, and a rotating handle 19 is attached to the upper end of the operating valve stem 15. Type pressure reducing regulating valve.