JP2513962Y2 - Valve structure of antifreeze faucet - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in the valve structure of a piston-cylinder type antifreeze water tap using a ball as an auxiliary valve.

[0002]

2. Description of the Related Art Conventionally, an antifreeze water faucet must have an auxiliary valve at its inflow port so that the piston can be pulled out without stopping the water stopcock installed upstream when repairing the piston. Was done normally. Among them, Japanese Utility Model Publication No. 52-55710 by the same applicant uses a ball as an auxiliary valve and has a valve seat on the cylinder side rather than in the inlet, so that the structure is simple and a large flow rate is achieved. It has the advantage of being obtained and has been widely used.

However, when the rubber packing attached to the inflow port is tightened and the hole diameter of the packing becomes smaller than the ball diameter to some extent, a high-speed jet flux hits the ball and vibrates, causing the jet flux to form. When the ball becomes smaller, the ball is attracted to the inlet side, which is opposite to the flow direction, and vibrates violently in the vicinity to generate noise, and friction with the inner wall of the valve box causes wear of the ball. It was. In order to prevent this, the same applicant also has a public publication of Sho 62-1419.
As described in Japanese Patent No. 8, an obstacle for generating an irregular flow is provided on the upstream side of the ball so that the jet flow from the inlet collides with the pressure distribution acting on the surface of the ball as uneven as possible. There was a method of making it happen.

By the above-mentioned method, the generation of vibration is greatly suppressed, the generation of noise and the wear of the ball have become almost no problem, but the thicker the obstacle is, the more effective it is.
On the contrary, it adversely affects the flow rate, and there is a defect that the flow rate as initially expected cannot be obtained. In particular,
Recently, in each municipality, water is being supplied directly to high places such as the third and fifth floors without using tanks, and antifreeze water taps with a minimum head loss have been demanded. In the current situation, it was a problem that had to be resolved immediately.

[0005]

In view of the above points, in the present invention, there is no noise and wear due to vibration of the ball even if the hole diameter of the inlet side mounting packing becomes small, and the above demands are sufficiently satisfied. It is an object to provide an antifreeze water faucet capable of achieving a large flow rate.

[0006]

SUMMARY OF THE INVENTION The present invention is directed to an inlet of a valve box.
There are two cylinders on the top and bottom of the
In the case where the packing is attached and water is stopped,
Between the cylinders, so that the jet from the inlet is first hit from colliding with the piston bowl, provided a valve chamber for accommodating the ball, for example such as an inlet to the opposite side, the inlet and separate Rutotomoni , Facing each other with the piston in between,
From the opposite direction, head down to the lower part of the valve chamber
A ball guide with a smaller internal dimension ,
A Do <br/> shall be provided a valve seat of the ball to the upper cylinder bottom in et.

[0007]

Therefore, the jet from the inflow port first collides with the piston and diffuses, and then the ball is hit by an irregular flow, so that the aforementioned vibration does not occur at all in combination with the thick piston. Moreover, since there are no obstacles, balls or valve seats at the inlet, a sufficient flow rate can be obtained to satisfy the above requirements.

[0008]

1 shows an embodiment of the present invention, in which 1
Is an inflow side valve box having an inflow port 2, and is connected to an outflow side valve box 7 having an upper outflow port 5 and a drainage port 6 thereabove by a nut 4 locked by a ring 3. The outflow side valve box 7 is internally provided with three cylinders 8, 9, 1 in order from the top.
0 is provided, and the inflow valve box 1 is provided with a cylinder 11 having a closed lower end inside. Reference numeral 12 is a piston, and four annular packings 13 are slid outwardly in this order from the top,
14, 15 and 16 are attached, and a small diameter portion 17 serving as a passage for water is formed between the annular packings 14 and 15.

Inside the inflow valve box 1Between cylinders 10 and 11
And an auxiliary valve on the side opposite to the inlet 2 via the piston 12.
A valve chamber 19 for accommodating the ball 18,andpiston1
2AcrossOpposite, descending from the opposite direction of the valve chamber 19
soHead to valve chamber 19, With internal dimensions smaller than ball 18
Guide toPart 20Form.Furthermore, the cylinder 10
At the bottomballThe valve seat 21 against which 18 abutsMake. Figure
Although not shown, the drainage port 6 prevents contamination of underground wastewater.
A check valve is installed, and the outflow valve box 7 is connected via a pipe 22.
Also, the piston 12 is connected via the joint 23 and the rod 24.
Extends upwards and connects to the ground controls (not shown)
Be done. 25 is an O-ring for water leakage prevention, which is used when assembling.
Isball18 may be inserted from that portion.

The figure shows a water flowing state, in which water from the inflow port 2 passes through a gap between the cylinder 10 and the small diameter portion 17 of the piston 12 from the outflow port 5 through a rising pipe (not shown) but at the end faucet. Is flowing to. At this time, ring packing 14, 1
6 is in close contact with the cylinders 9 and 11, respectively, and there is no water leakage from them. When draining water from the rising pipe, the rod 24 and the piston 12 may be lifted from the state shown in the drawing.
First, the annular packing 15 is in close contact with the cylinder 10 to block the water from the inflow port 2, then the annular packing 14 is separated from the cylinder 9, and the water in the rising pipe is discharged from the drainage port 6 to the ground. . At this time, the annular packing 13 is in close contact with the cylinder 8 and the water in the rising pipe does not rise into the pipe 22.

Even if the rubber packing (not shown) on the inlet 2 side is tightened to reduce the hole diameter in the water-flowing state shown in the figure, the high-speed jet from there first collides with the piston 12 and diffuses, since then hit the ball 18, the ball 18
Since the pressure distribution acting on the surface of the is not uniform, the above-mentioned regular violent vibration does not occur, and noise and wear of the ball do not occur. In this case, since the diameter of the piston 12 as an obstacle can be made considerably large, the above-mentioned effect is further enhanced. Further, since there is nothing that causes a head loss in the inflow port 2, it is possible to obtain a larger flow rate than that of the above-mentioned reference example.

In the embodiment, since the inflow side valve box 1 and the outflow side valve box 7 are separated and connected by the nut 4, the directions of the inflow port 2 and the outflow port 5 can be freely changed during the installation work. In addition, the ball 18 can be easily inserted, which is convenient. Piston 12 is pipe 22 due to failure of annular packing
When the ball 18 is pulled out, the ball 18 instantly rises due to the water flow from the inflow port 2 and comes into contact with the valve seat 21, blocking the water from the inflow port 2. Therefore, it is convenient because there is no need to search and stop the water stopcock (not shown) provided on the upstream side. When the piston 12 is inserted after the repair is completed, the tip of the piston 12 pushes down the ball 18 against the water pressure to disengage it from the valve seat 21, and further toward the lower part of the valve chamber 19.
The guide part 20 is contacted with the guide part 20 having a downward slope.
20 is provided facing the side wall between the cylinders 10 and 11.
And the diameter of the ball 18 depends on the inner size of the guide portion 20.
Since the piston 12 is larger than the ball 18,
Along descends in the cylinder while rolling press smoothly, reliably retracted into the valve chamber 19 of the ball 18, the later, the piston 12 will return to the position of FIG.

In the illustrated embodiment, the valve chamber 19 is provided on the opposite side of the inflow port 2 via the piston 12, but this is provided at a right angle. However, the jet flow from the inflow port 2 first collides with the piston 12 in any case. The inflow side valve box 1 and the outflow side valve box 7 can be connected in various ways other than the nut 4. Further, a cylinder 10 for water blocking is provided in the inflow side valve box 1 and a ball 18 is inserted from a valve chamber 19. It is also possible to use a plug, etc. Further, the drainage port 6 is provided at the lower end of the cylinder 11 of the inflow side valve box, the drainage valve is normally closed to close the drainage port, and the piston 12 is lowered to stop the water from the inflow port 2 and then drained at the lower end of the piston. It is also possible to freely change the design, such as pushing the valve open to allow the water to drain, or designing the water blocking cylinder 11 to form a water flow path inside the piston.

[0014]

[Effects of the Invention] As described above, according to the present invention,
Since the piston itself is used as the obstacle for producing the irregular flow described in Japanese Patent Publication No. 2-14198, it is possible to thicken the obstacle without adversely affecting the water discharge amount, and thus the above-mentioned vibration preventing effect. It also increases noise, wear of the ball can be eliminated, and there is nothing that obstructs the flow of water such as valve seats, obstacles and balls at the inlet, so it is possible to supply a large flow rate. In addition to the advantage that it becomes, it also has an economic advantage that the trouble of inserting an obstacle into the inflow port can be saved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view in a water passing state showing one embodiment of the present invention.

[Explanation of symbols]

1 Inlet side valve box 2 Inlet 5 Outlet 6 Drainage port 7 Outlet side valve box 8, 9, 10, 11 Cylinder 12 Piston 13, 14, 15, 16 Annular packing 18 Ball 19 Valve chamber 20 Guide part 21 Valve seat

Claims (1)

(57) [Scope of utility model registration request] 1. A valve box having an inflow port, an outflow port, and a drain port.
The pistons are attached to the two cylinders above and below the inlet.
In an antifreeze water tap of a type in which the annular packing is in close contact with the water to stop the valve box , the valve box is divided into an inflow valve box having an inflow port and an outflow valve box having an outflow port above the inflow valve box. Up
Serial Between the two locations cylinder reaches jet from the inlet via the piston Subeku, provided with a valve chamber for accommodating the balls separate from the inlet, across the opposed piston
From the opposite direction of the valve chamber to the lower part of the valve chamber.
A valve structure for an antifreeze water faucet, wherein a ball guide portion having an inner dimension smaller than that of the ball is formed, and a ball valve seat is provided at the lower end of the upper cylinder.