JPS6219728Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a valve structure for an antifreeze faucet having a secondary water stop body.

Conventionally, when an anti-freeze faucet is pulled out of the valve body for piston repair or inspection, a secondary water stop element is usually inserted into the valve body to save the effort of stopping the upstream water stop valve each time. However, it has been adopted in recent years to have an inlet, an outlet, and a drain on the side wall.
When a secondary water stop body is housed in a so-called piston-cylinder type antifreeze faucet, in which a piston equipped with an O-ring moves up and down inside the valve body, which has a cylinder inside, to shut off and drain water, A secondary water stopper is inserted inside the inlet, and when the valve is open, the piston prevents the secondary waterstop from entering the cylinder, creating a gap between the secondary waterstop and the valve seat provided inside the inlet. Generally, a secondary water stop body is pressed against the valve seat by water pressure to block water from the inlet when the piston is withdrawn.

However, this method has a major drawback in that the size of the secondary water stop is limited because the dimensions of the inlet mounting screw are fixed, and therefore the flow rate is inevitably reduced. Ta.

In view of the above, the present invention has been developed to easily obtain a large flow rate even when a secondary water stop body is housed in such a piston-cylinder type antifreeze faucet.
The purpose of this invention is to provide a valve structure for an antifreeze faucet.

The basic structure of the present invention to achieve the above object is as follows.

That is, an inlet valve body having an inlet is attached to two annular flanges provided on the sides of an outlet valve body having an outlet and a cylinder, with an O-ring interposed between them, and the valve body is secured by a retaining member. The inflow side valve body is rotatably connected to the outflow side valve body so that it does not separate from the outflow side valve body, and a water stop body housing chamber is formed between the inner and outer walls of both and the annular flange, and the water from the inlet is prevented from flowing. In order to communicate with the outlet, there is a valve seat at the outer tip, and a water inlet with a circular cross section is opened on the side wall of the valve body on the outflow side between the annular collar, and when the valve is in the open state, the tip A secondary water stop body having a certain length and a protrusion that provides a guide for the water inlet is installed so that the water stop body comes into contact with the piston and secures a flow path.
The secondary water stopper is accommodated in a secondary waterstop body housing chamber, and when the piston is pulled out, the secondary waterstop body is pressed against the valve seat by water pressure to shut off water from the inlet.

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

In FIG. 1 and FIG. 2 showing a horizontal cross-sectional view taken along the line A-A in FIG. The outflow side valve body 1' is provided with an outflow side valve body that protrudes toward the outside.Four cylinders 5, 6, 7, and 8 are disposed inside the outflow side valve body 1' in order from the top. 9 is a piston, and the above-mentioned cylinder 5,
It has four O-rings 10, 11, 12, 13 that slide along the O-rings 6, 7, and 8, respectively. 14
is a retaining member made of an elastic metal ring with one end cut off to lock the inflow side valve body 1 and the outflow side valve body 1'; when assembling both, the outflow side valve body When the retaining member 14 is locked in the deep groove 15 formed in the inlet valve body 1' and inserted into the inlet valve body 1, the retainer member 14 is held in the deep groove by the tapered portion 16 provided in the inlet valve body 1. 15 is compressed inward, and when it finally reaches the shallow groove 17 formed in the inlet valve body 1, the retaining member 14 is pushed out and the inlet valve body 1 is separated from the outlet valve body 1'. They are rotatably connected without any twisting. In other words, since the inflow port 2 and the outflow port 3 can freely change their orientations, the installation work is very easy and the number of parts to be installed is reduced, which is convenient. The inflow side valve body 1 has two annular flanges 1 provided on the sides of the outflow side valve body 1'.
8, 18' are tightly attached to O-rings 19, 20 to prevent pressure water from leaking from the inlet 2. Reference numeral 21 designates an approximately concentric secondary water stop body housing chamber formed by the inner wall of the inlet side valve body 1, the outer wall of the outlet side valve body 1', and the annular collar portions 18, 18'; It is connected to 2. 22 is a secondary water stop body, which includes a secondary water stop body housing chamber 21 and an outlet 3
It is made up of a protrusion 24 that protrudes into a water inlet 23 formed in the side wall of the inlet valve body 1 to provide electrical continuity between the valve body 1 and the piston 9, and a disc-shaped water stopper 25. In other words, regardless of the orientation of the inlet 2, the secondary water stop body 22 is always in the same position. 26 is the water inlet 2 provided in four places on the protrusion 24.
3, and is used to ensure that the secondary water stop body 22 moves in and out smoothly when the piston is withdrawn or inserted. 27 is a water stop part 2 of the secondary water stop body 22 provided at the entrance of the water inlet 23, that is, at the outer tip, when the piston is pulled out.
5 is the valve seat that comes into contact.

The operation of the above embodiment is as follows.

That is, in the embodiment shown in the open state in FIG.
are in close contact with cylinders 6 and 8, respectively, and O-ring 1
2 is detached from the cylinder 7, and the secondary water stop body 22
is prevented from entering the cylinder by the piston 9 and has a gap between it and the valve seat 27, so that water from the inlet 2 flows between the water stop portion 25 of the secondary water stop body 22 and the valve seat 27. The water passes through the gap and flows from the gap between the protrusion 24 of the secondary water stopper 22 and the guide 26 and the water inlet 23 to the outlet 3 without any other outflow. When the piston 9 is raised from this state, the O-ring 12 hangs on the cylinder 7, and since the O-ring 13 does not come off from the cylinder 8, the two O-rings
The rings 12 and 13 block water from the inlet 2, and when the piston 9 rises further, the O-ring 10 is applied to the cylinder 5, and the O-ring 11 is removed from the cylinder 6, so that it is connected to the outlet 3. Due to the natural drop between the faucet and the drain, the water in the riser pipe (not shown) that reaches the faucet in the room is discharged into the ground through the drain 4 without flowing elsewhere, and into the freezing atmosphere. Since there is no residual water, freezing accidents can be prevented. In other words, it is in a closed state.

Next, a case will be described in which it becomes necessary to repair or inspect the piston.

When the piston 9 is pulled out from the state shown in FIG.
is instantly pressed against the valve seat 27, blocking water from the inflow port 2. Therefore, the piston can be repaired and repaired on the ground without stopping the upstream stop valve.
Can be inspected. Next, when the piston 9 is inserted after the repair is completed, the tip of the piston 9 pushes back the protrusion 24 of the secondary water stop against the water pressure, and the gap between the valve seat 27 and the water stop 25 is Create a gap and return to the position shown in Figure 1.

Figure 3 shows how the inlet and outlet can be freely oriented.
This is another embodiment in which a cap-shaped retaining member 14 is screwed into the lower end threaded portion 28 of the outflow side valve body 1.

As mentioned above, the present invention provides a chamber formed by a valve body having an inlet and a valve body having an outlet;
It has a structure that accommodates a secondary water stop body, and unlike conventional products, the secondary water stop body is not housed at the inlet, so there is no restriction on the size of the secondary water stop body.
Therefore, there is an advantage that a large flow rate can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing an embodiment of the present invention in an open state, Fig. 2 is a cross-sectional view taken along the line A-A in Fig. 1, and Fig. 3 is a cross-sectional view showing another embodiment of the present invention. FIG. 4 is a longitudinal sectional view of the main part, and FIG. 4 is a perspective view of the secondary water stop body. 1... Inflow side valve body, 1'... Outflow side valve body,
2...Inflow port, 3...Outflow port, 4...Drain port,
5, 6, 7, 8...Cylinder, 9...Piston,
10, 11, 12, 13, 19, 20... O ring, 14... Removal prevention member, 18, 18'... Annular flange, 21... Secondary water stop body housing chamber, 22... Secondary water stop body , 23... water inlet, 24... protrusion, 25...
...Water stop part, 26...Guide, 27...Valve seat.

Claims (1)

[Scope of utility model registration request] The side wall has an inlet, an outlet, and a drain that protrudes outward, and a piston fitted with an O-ring moves up and down inside the cylindrical valve body that forms a cylinder inside to shut off water and drain water. In the piston-cylinder type antifreeze faucet, the valve body is divided into an inlet valve body having an inlet and an outlet valve body having an outlet, a drain port, and a cylinder, and the outer wall of the outlet valve body is The inflow side valve body is fitted from the outside of the outflow side valve body so that the inlet is located between the two protruding annular flanges, and the space between the inner wall of the inflow side valve body and the two annular flanges is a horizontally oriented water inlet with a circular cross section, which forms a circular secondary water stop body housing chamber surrounded by the outside wall of the outflow side valve body, and has a valve seat on the outside wall of the outflow side valve body forming the secondary water stop body housing chamber; of,
A secondary water stop body housing chamber is provided with an opening in the cylinder of the outflow side valve body where the piston moves up and down, and a water stop part with a circular cross section and a diameter larger than the water inlet is provided, and a water stop part with a smaller diameter than the water inlet is provided at the tip of the water stop part. A secondary water stop body consisting of a protrusion that provides a guide for the water outlet on the side.
The water stop part is housed in the secondary water stop body housing chamber facing the valve seat, and the tip of the protrusion of the secondary water stop body comes into contact with the piston due to water pressure, causing the valve seat and the water stop body to contact each other. A valve device for an antifreeze faucet, characterized in that a water flow path is formed between the pistons, and when the piston disappears, a water stop portion is pressed against a valve seat by water pressure to shut off water from an inflow port.