JPS5914540Y2 - Decompression type antifreeze faucet - Google Patents

Description

[Detailed explanation of the invention] Conventionally, especially in areas with high water pressure, accidents such as abnormal noises caused by the insect repellent water hammer when the faucet is closed, damage to meters and pipe fittings, or accidents that occur when the faucet is slightly opened have been reported. In order to eliminate the inconvenience of being uneconomical as a large amount of water comes out and having to be careful when using it, a pressure reducing valve or throttle valve is installed in the middle of the pipe leading to the faucet to lower the water pressure. , or the flow rate is often reduced.

However, if they are used in cold regions, when draining the water in the pipes using an antifreeze faucet, it may take longer to drain the water, or the remaining water may freeze in that area and cause the water to drain out the next time. It cannot be used because it may lead to accidents where water does not come out.
In reality, when closing a faucet, people were careful to close it slowly to avoid water hammer, or they operated the faucet, putting up with the slight cost or inconvenience.

In view of the above points, it is an object of the present invention to provide a device that eliminates all of the above-mentioned defects by providing the antifreeze faucet itself with a pressure reducing function.

In order to achieve the above object, the present invention has a diameter difference between the cylinders provided above and below the inlet of the valve body of the antifreeze faucet, and the cylinders provided between the outlet and drain ports, and A secondary water pressure chamber adjacent to the outflow port is formed between the cylinders, and a required number of ring-shaped gaskets for sliding the cylinders are provided, and a communication hole is provided inside to open the lower end chamber of the piston to the atmosphere. A downward force is constantly applied to the piston by a spring to balance the upward force due to the secondary water pressure in the pressure chamber, and when the faucet is closed from the water flowing state, the piston rises while compressing the spring, and A ring-shaped gasket is tightly attached to two cylinders with substantially the same diameter placed above and below the inlet to shut off primary water, providing a depressurizing mechanism.When draining water, operate the handle, and the handle and rod etc. The piston connected through the faucet is raised further than the position when the faucet is closed, and the ring-shaped gasket for drainage is removed from the cylinder to drain the water in the secondary piping underground and activate the antifreeze function. It was designed to have the following.

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

In Fig. 1, the valve body 1 is arranged sideways from the bottom to the inlet 2.
, an outflow port 3, and a drain port 4, and four cylinders 5, 6, 7.8 are provided inside the cylinder in order from the top.

The piston 9 has four ring-shaped gaskets 10, 11.12 that slide on the outside of the cylinders 5, 6, 7.8, respectively.
13 is installed, and a communication hole 14 is provided inside the ring opening from the lowermost end to above the uppermost ring-shaped packing 10.

The cylinders 5 and 6 are formed to have a larger diameter than the cylinder 7.8, and a pressure chamber 15 adjacent to the outlet 3 is provided between the cylinders 6 and 7, so that a rising force due to secondary water pressure is applied to the piston 9. ing.

In order to apply a downward force to the piston 9 in response to the upward force, a spring 1 is applied above the piston 9 to press the upper end of the piston.
Piston joint 1 that accommodates 6 and inserts pin 17 below
8 and a conformal notch groove 19 is formed at the upper end of the piston 9. Under normal conditions, the piston 9 freely moves up and down in response to fluctuations in the spring 16 and the secondary water pressure, raising the piston joint 18. When the above vertical notch groove 1 is inserted into the pin 17,
The upper end of 9 is locked so that it also rises.

The valve body 1 is connected to an operating section main body 21 via a pipe 20, and the piston joint 18 is connected to an operating rod 23 via a rod 22.
connected to.

The operating rod 23 is connected by a pin 24 to a cam 25 opposing the operating rod 23, and is moved up and down by the rotation of a handle 26 formed integrally with the cam 25.

The cam 25 can be moved up and down by a lower sliding surface 27 of the operating section main body 21 and a rain shelter surface of an upper sliding surface 29 provided on a protrusion 28 facing above the lower sliding surface 27 with the cam 2 interposed therebetween. Therefore, when the handle 26 is rotated to the right in the figure, the cam 25 and its center rotate while moving in the left-right direction, and at the same time, the operating rod 23 rotates within the operating section main body 21 and the pipe 20. It will rise without any problem.

Note that the communication hole 14 formed in the piston 9 is opened from the lower end into the vertical notch groove 19 to connect the piston lower end chamber 30 to the atmosphere in the pipe 20; Ring-shaped packing 10 instead of
and 11, and in the drain position where the piston 9 is at its highest position, even if the ring-shaped gasket 13 is damaged and leaks, water will rise into the pipe 20 through the communication hole 14 and freeze. It can also prevent such accidents.

Next, the operating mode of the present invention will be explained.

Figure 1 shows a state in which the faucet (not shown) installed at the end of the secondary pipe on the downstream side of the outflow port 3 is open and water is flowing, that is, water is flowing. The water passes through the gap between the cylinder 7 and the piston 9, becomes secondary water with a lower pressure than the primary water, flows into the secondary piping from the outlet 3, and is discharged from the faucet.

Since the cylinders 5 and 6 are formed to have a larger diameter than the syringes 7 and 8, a rising force due to water pressure is acting on the piston 9, but if the faucet is opened further from this state, the secondary water pressure will decrease. The rising force due to the secondary water pressure acting on the ring-shaped packing 11 is reduced, and the piston 9 is lowered by the force of the spring 16, increasing the flow rate.

On the other hand, as you close the faucet, the secondary water pressure increases and spring 1
The piston 9 rises while compressing the air flow rate 6, decreasing the flow rate.

When the faucet is completely closed, that is, when the water is stopped, the secondary water pressure reaches its maximum, and the ring-shaped gasket 12 comes into close contact with the cylinder 7, blocking the primary water from the inlet 2.

The strength of the spring 16 may be set in advance so that the secondary water pressure at this time becomes the set pressure.

If a strong spring is used, the set secondary pressure will increase, and if a weak spring is used, the set secondary pressure will decrease accordingly.

When the water is stopped, the ring-shaped gaskets 12 and 13 are in close contact with the cylinders 7 and 8 to block the primary water on the inlet 2 side, but since the cylinders 7 and 8 are configured to have the same diameter, Equal water pressure acts on the ring-shaped packings 12 and 13 in opposite directions, so even if the primary pressure fluctuates, no upward force or downward force acts on the piston 9, and the set secondary pressure does not change. Nor.

In other words, it completely functions as a pressure reducing valve.

Of course, in this state, the ring-shaped packing 11 has not yet separated from the cylinder 6.

A lifting force by the spring 16 is always acting on the operating rod 23, but since the center of the cam 25, the pin 24, and the operating rod 23 are located on the same axis, the lifting force of the operating rod 23 is applied to the cam 2.
5 does not act as the rotational force of spring 16, so the operating rod 23
It will not rise on its own.

Next, when you want to drain the water from the secondary side piping from the water flow state shown in the figure, all you have to do is turn the handle 26 to the right in the figure, and as mentioned above, the operating lever 23, rod 22, and piston joint 18 will also rise. Along with this, the piston 9 whose vertical notch groove 19 is locked by the pin 17 also rises, and the ring-shaped gasket 12 comes into close contact with the cylinder 7 to cut off the primary water from the inlet 2, and the handle 26 is moved up to 180 degrees. ° When the upper end of the cam 25 hits the lower sliding surface 27 and stops rotating, the ring-shaped gasket 11 for drainage is moved to the cylinder 6.
The water in the secondary pipe is completely discharged into the ground from the drain port 4.

At this time, the ring-shaped packing 10 is in close contact with the cylinder 5, and drainage water does not rise into the pipe 20.

In this state, as mentioned above, the -coal water pressure is acting equally on the ring-shaped packings 12 and 13 in opposite directions, and the secondary water pressure is zero, so the piston 9 is Since no upward force due to water pressure acts, and since the center of the cam 25, the pin 24, and the operating rod 23 are located coaxially, the downward force due to the weight of the rod 22, etc. does not act as a rotational force on the cam 25. Therefore, the piston 9 does not descend due to its own weight, and the piston 9 is stopped at that position.

In addition, since the piston lower end chamber 30 is always open to the atmosphere in the pipe 20 through the communication hole 14 formed in the piston 9, when the piston 9 moves up and down, the water or air in the piston lower end chamber 30 is removed. Operation is smooth because there is no compression or negative pressure.

Next, FIG. 2 will be explained.

FIG. 2 shows another embodiment of the present invention, which is also a longitudinal cross-sectional view of the valve portion in a water-flowing state, and the differences from FIG. 1 are as follows.

Note that the same parts as in FIG. 1 are given the same reference numerals.

In this embodiment, the number of cylinders is changed from four to three,
The inlet 2 is located at the top, the outlet 3 is located in the middle, and the drain 4 is located at the lower end.The cylinders 7 and 8 above and below the inlet 2 have large diameters, and the cylinder 6 below the outlet 3 has a small diameter. A pressure chamber 15 adjacent to the outlet 3 is formed between the cylinders 8 and 6.

The piston 9 has a communication hole 14 inside, and the communication hole 14 has a larger diameter at the bottom to form a ball storage chamber 31, and a ball 32 is formed in the communication hole 14.
to accommodate.

The ball storage chamber 31 has a valve seat 33 at the upper end, and the ball 3
Insert the pin 34 so that 2 does not come off downward.

An adjustment screw 35 is provided in the piston joint 18 to adjust the strength of the spring 16, and the rod 22 is connected to the pipe 2.
The set secondary pressure can be arbitrarily adjusted by removing it from 0, removing it from the piston joint 18, and turning the adjustment screw 35.

Note that at this time, it is of course possible to integrate the rod 22 and the adjustment screw 35 and adjust the set secondary pressure by adjusting the screwing degree of the rod 22.

When the piston 9 is raised and the ring-shaped packing 11 is disengaged from the cylinder 6 to drain water, water also tries to rise in the communication hole 14, but the water flow immediately causes the ball 32 to float up and block the valve seat 33. No water rises into the pipe 20.

Since the ball 32 closes the valve seat 33 even when the piston 9 descends, the water in the piston lower end chamber 30 is discharged underground from the drain port 4, and when the piston 9 ascends, the ball 32 separates from the valve seat 33. Piston lower end chamber 3 via communication hole 14
0 is open to the atmosphere, so there is no possibility that the lower end chamber of the piston will have a negative pressure, which will make the operation of the piston 9 heavier, or that it will absorb underground sewage.

Other operating modes are similar to those in FIG.

Next, FIG. 3 will be explained.

Figure 3 also shows the water flow state, the number of cylinders,
The positional relationship between the inlet 2, the outlet 3, and the drain 4 is the same as that shown in FIG.

That is, a flow passage 36 is bored in the piston 9, an inlet lateral hole 37 is formed between the ring-shaped packings 10 and 12, and an outlet lateral hole 38 is formed between the ring-shaped packings 13 and 11, respectively.
It is designed to open to the

Furthermore, a piston upper part 9' that is connected to the rod 22 at the upper part and protruded into the flow path 36 at the lower part is connected to the piston 9.
form 2.

The operating rod 23 accommodates a spring 16 therein, and applies a pressing force to a rod joint 39 connected to the rod 22.

The operating rod 23 is operated by the pin 40 inserted into the rod joint 39.
and the rod joint 39 is locked.

In other words, the piston 9, rod 22, and rod joint 39 perform the same operation.

The strength of the spring 16 can be adjusted by removing the handle screw 41 and turning the adjustment screw 35, and there is no need to pull out the rod 22 from the pipe 20 each time as in the embodiment shown in FIG. Adjusting the pressure becomes very easy.

The operating portion main body 21 and the operating rod 23 are screwed together by an operating screw 42, and as the handle 26 is rotated, the operating rod 23 rotates and rises to enter the draining state.

Other operating modes are similar to those in FIGS. 1 and 2.

The present invention has been described above with reference to the embodiments shown in FIGS. 1 to 3, but instead of manually operating the handle 26, electrical remote control is performed using the driving force of a motor or the like. It is also possible to provide a bypass on the side of the valve body 1 to use as a water passage or a communication port with the atmosphere, or to change the positional relationship of the inlet 2, outlet 3, and drain 4, and the position of the cylinder and ring-shaped packing. The number of valves may be changed as appropriate, the valve body 1 may be divided into two to allow the orientation of the inlet 2 and outlet 3 to be changed freely, or a secondary water stop valve such as a ball may be accommodated in the inlet 2. You are free to make any design changes.

As described above, in this invention, the anti-freeze faucet itself has a pressure reducing function, which eliminates accidents caused by water hammer, wasted water, and inconvenience when operating the faucet even in high-pressure areas. It has the advantage of being able to

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of one embodiment of the present invention in a water-flowing state, FIG. 2 is a longitudinal cross-sectional view of main parts of another embodiment in a water-flowing state, and FIG. FIG. 2 is a longitudinal cross-sectional view showing two embodiments, also in a water-flowing state. 1...Valve body 2...Inflow port, 3...
... Outlet, 4... Drain port, 5-8...
...Cylinder, 9...Piston, 10-13
...Ring-shaped gasket, 14 ... Communication hole, 15 ... Pressure chamber, 16 ... Spring,
20... Pipe, 21... Operating unit main body, 22... Rod, 23... Operating rod.

Claims (1)

[Scope of utility model registration request] It is connected to the operation unit main body via a pipe, and there is an inlet on the side,
A piston having a required number of ring-shaped gaskets, which is connected via an operating lever and a rod, moves up and down inside the cylindrical valve body having an outflow port and a drainage port. In an antifreeze faucet of the type in which the ring-shaped gasket fits tightly onto two cylinders of the same diameter to stop water, the cylinders installed above and below the inlet, and the cylinders installed between the outlet and drain ports. A pressure chamber adjacent to the outlet is formed between the large and small cylinders by having a diameter difference between the cylinders, and the piston has a communication hole therein to open the lower end chamber of the piston to the atmosphere. A pressure-reducing antifreeze faucet that constantly receives downward force from a spring.