Fire hydrant system

A hydrant system having a water-supply valve opening/shutting unit 201, comprising:

• cock shaft 207 having the bottom connected to an opening/closing packing element 208, thus opening/shutting between a water-guide tube 213 and a water-supply valve 202;
• a male screw 206 formed on the outer circumference of a cock shaft 207 that is screwed to a female screw 205 on the inner circumference of a boss 204, wherein the boss is projected on one side of the water-supply valve 202 and wherein the top of the cock shaft 207 is exposed outside the boss 204 and is coupled to a primary shaft 220 of a primary universal joint A;
• a secondary shaft 221 of the universal joint A having a distal end coupled to a primary bar 222 having a square section, wherein the secondary shaft 221 is connected to the primary shaft 220;
• a secondary bar 223 having a top end and coupled to a primary shaft 224 of a secondary universal joint A′, wherein the top end of the secondary bar 223 has a square inner surface into which a square outer surface of the primary bar 222 is inserted by a predetermined length;
• and
• a rotating shaft 226 that is vertically formed and has the bottom to which the primary shaft 224 and a secondary shaft 225 of the secondary universal joint A′ are coupled, wherein the distal end of the secondary shaft 225 is coupled to one side of a hydrant cover plate M1,
• wherein the top of the rotating shaft 226 has a square cross section and is protruded on a depressed groove 227 formed in the cover plate M1.

A hydrant system having an anti-freezing device, comprising:

• a vertical rotating shaft 312 having a square head and formed on a male cylinder 310 in the length direction up to the bottom distal end of the male cylinder, wherein the vertical rotating shaft and the male cylinder are matched using a female screw 313 and a male screw 314;
• an opening/shutting valve 315 of a dish shape, which is fixed to the bottom distal end of the vertical rotating shaft 312 by means of a nut 316, wherein the opening/shutting valve comprises water-feeding holes 318 on a dish-shaped body 317 and a rubber covering material 319 having a cross section of wherein the material is covered on the outer circumference of the body 317;
• water-feeding holes 320 formed at portions where the dish-shaped body 317 and the bottom of the rubber covering material 319 are brought into contact;
• a female cylinder 322 having a convex room 323 of predetermined width and diameter at a place where the opening/shutting valve 315 on the female cylinder 322 is located;
• and
• a drain valve 321 disposed in a water-supply valve 304.

A hydrant system, comprising:

• a sluice valve 20 connected to a water-guide tube 10 within a manhole M, the sluice valve having a first opening/shutting shaft 21 disposed therein;
• a female cylinder 30 connected to the sluice valve 20 and standing upright, wherein the female cylinder includes a drain valve 31 that is opened when the sluice valve 20 is locked and that is locked when the sluice valve 20 is opened, and a bracket 36 formed thereon, the bracket having a through-hole;
• a male cylinder 40 disposed to pop in and out upwardly against the female cylinder 30, wherein the male cylinder includes a fire-fighting water exhaust unit 41 connected to a fire hose thereon, a screw hole bracket 43 disposed within the fire-fighting water exhaust unit 41, wherein the screw hole bracket has a screw hole 42 formed therein, a piston rod 44 screwed to the screw hole 42, and a piston 45 disposed at the bottom of the piston rod 44, wherein the piston opens and shuts the bottom of the male cylinder 40 as the piston rod is rotated in the forward or reverse direction;
• a rod 50 for limiting a projection range of the male cylinder 40 protruded from he female cylinder 30, wherein the rod has one side fixed to the top of the male cylinder 40 and the other side slidingly inserted into the through-hole of the bracket 36, and wherein the rod has a fixing projection 51 of a diameter greater than the through-hole so that the projection is not deviated from the bracket 36;
• a manhole cover 60 that covers the manhole M, wherein the manhole cover has a sub hole 62 through which the male cylinder 40 passes;
• a second opening/shutting shaft 61 disposed at a frame M1 of the manhole M or the manhole cover 60, for rotating the first opening/shutting shaft 21;
• and
• a universal joint 70 being flexible, for coupling the first opening/shutting shaft 21 and the second opening/shutting shaft 51.