JPH061646Y2 - Telescopic sprinkler with check valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an extendable sprinkler having a check valve.

Traditionally, sprinklers are housed in underground meter boxes,
There were two types, one with a hose attached for water supply, and one with a hose protruding above the surface of the earth. For items that are underground, for example, you must attach a hose even when supplying water to a bucket, However, there is a defect that it is troublesome to bend down and operate it one by one when it is stopped, and if it protrudes on the surface of the earth, it takes an extra space, and if you forget to drop the winter water, it may be frozen. There was a defect that accidents were likely to occur.

In consideration of the above points, the present invention is designed so that it can be pulled up only when it is used and protruded to the surface of the earth, and when it is finished using it, it can be stored in the meter box and drained at the same time, without taking up extra space The purpose is to provide a sprinkler that can easily supply water and prevent freezing due to forgetting to drop water.The other purpose is to accommodate a check valve in the piston to prevent the occurrence of negative pressure. It prevents the reverse flow of dirty water and allows the check valve to be easily repaired on the ground if the piston is pulled out.

The present invention will be described below with reference to the embodiments shown in the drawings.

In FIG. 1, reference numeral 1 is a valve box, which has an inflow port 2 at a lateral intermediate portion, a first drainage port 3 at a lower end, and a second drainage port 4 at an upper end portion. Cylinders 5 and 6 are formed inside, and a plug 7 is connected to the lower end. A piston 11 having O-rings 8, 9 and 10 which slides on the cylinders 5 and 6 is housed in the valve box 1. The piston 11 has a communication passage 12 formed therein and a ball-shaped upper end. The check ring 13 is housed by a clip ring 14 so as not to be separated upward. A drain bar 15 is housed in the communication passage 12 by the collar 16 so as not to be separated downward. An outer tube 17 is connected to the valve box 1, extends upward, and an upper body 18 is connected to the upper end. An inner cylinder tube 19 is connected to the piston 11 and also extends upward so that the support fitting 2 is attached to the upper end.
0 is connected. An elastic ring 21 made of a plastic whose end is cut off is attached to the support fitting 20 outwardly, and it fits into the two engaging grooves 22 and 22 'provided in the upper main body 17 to easily I try not to leave. Further, an annular packing 23 is mounted on the inner side, and is closely attached to the water guide pipe 24 to prevent water leakage therefrom. The water conduit 24 has a stopper 25 connected to the lower end, and an elbow-shaped water discharge fitting 26 connected to the upper end. Although not shown, the first and second drainage ports 3 and 4 are designed so that underground wastewater does not enter the valve box 1.
Check valve is installed.

Next, the operation mode of the present invention will be described.

FIG. 1 shows a water-flowing state in which the water discharge fitting 26 is raised to the maximum and protrudes to the ground. However, the water from the inflow port 2 is lifted from the communication passage 12 to the check valve 13, and Water flows into the tubular pipe 19, passes through the water discharge fitting 26, and is discharged from a faucet (not shown) connected to the tip of the water discharge fitting 26. In this state, the elastic ring 21 is fitted in the upper engagement groove 22, so that the piston 11 does not descend due to the own weight of the inner tube 19.

Next, when the water is used up and stored in the meter box, the water discharge fitting 26 is pushed down to lower the water conduit 24, the lower end of the water discharge fitting 26 contacts the upper end of the support fitting 20, and the elastic ring 21 is pushed down. Support bracket 20
The piston 11 connected to the inner cylinder tube 19 also descends,
The O-ring 9 comes into close contact with the cylinder 6 to block the water from the inflow port 2, and the O-ring 10 separates from the cylinder 6,
It becomes the state of the figure. At this time, the elastic ring 21 is fitted in the lower locking groove 22 ', the drain bar 15 abuts on the plug 7 and relatively rises, and lifts the check valve 13, so that the inner tubular pipe All the water in 19 and the water pipe 24 will be drained into the ground from the 1st drainage port 3. In other words, the accident of forgetting to drop the water and freezing can be prevented. When re-establishing water flow, the water discharge fitting 26
You just have to lift the
The stopper 25 comes into contact with the lower end of the support fitting 20 so that the support fitting 20 and the piston 11 also rise, and the state shown in FIG. 1 is restored. At this time, since the drain bar 15 is descending due to water pressure, when a negative pressure is generated on the main pipe side due to work such as water interruption, the check valve descends and closes the communication passage 12, so that the hose is attached to the end of the faucet. Even when there is a sign, it is possible to prevent the accident of inhaling sewage from there and contaminating the inside of the main pipe. In addition, if water should enter the outer tube 17, it will be drained from the second drain port 4, so there will be no accident that water accumulates in the outer tube 17 and freezes. Since water does not enter the outer tube 17 of the above, there is no possibility that a portion close to the surface of the earth, for example, the elastic ring 21 is frozen by residual water drops and becomes inoperable.

As described above, since the sparger of the present invention is normally housed in the meter box, it does not take up an extra space, and
It is extremely easy to operate because it is projected to the surface of the water during the water supply, and there is no freezing accident due to forgetting to drop water, and the part near the surface does not freeze due to residual water drops, making it impossible to operate. It has an effect.

[Brief description of drawings]

FIG. 1 is a vertical sectional view in a water passing state showing one embodiment of the present invention, and FIG. 2 is a vertical sectional view in the same draining state. 1 is a valve box, 2 is an inlet, 3 is a first drainage port, 4 is a second drainage port, 5 and 6 are cylinders, 8, 9 and 10 are O-rings, 11
Is a piston, 12 is a communication passage, 13 is a check valve, 15 is a drain bar, 17 is an outer tube, 18 is an upper body, 19 is an inner tube, 20 is a support fitting, 21 is an elastic ring, and 22 and 22 '. Is a locking groove, 24 is a water conduit, 25 is a stopper, and 26 is a water discharge fitting.

Claims (1)

[Scope of utility model registration request] 1. A valve box having an inflow port opened between two cylinders provided inside, a first drain port at the lower end and a second drain port at the upper end, and an O-ring for sliding the cylinder. A piston provided with a water conduit inside, a backflow prevention valve housed in the upper end of the piston, and a backflow protection valve housed in the water conduit and capable of pressing the backflow prevention valve from below during drainage. A drainage rod, an inner cylindrical pipe that is connected to the piston and extends upward, a support fitting that is connected to the upper end of the inner cylindrical pipe and has an elastic ring with an end face separated on the outer periphery, and the valve box. An outer tube connected to the upper end and extending upward, an upper body connected to the upper end of the outer tube and having two locking grooves into which the elastic ring fits, and a lower end contacting the support fitting. Make a contact with the stopper, and attach it to the annular packing attached to the inner surface of the above support fitting. Slidably lifting to conduit upper end connected to the water discharge fitting with check valve with telescopic sprinkler stopper consisting of I.