JPS5910225Y2 - Automatic drainage fitting - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a joint for automatic water drainage in piping, which is used in conjunction with a drainage valve, especially in cold regions.

Traditionally, in cold regions, the drain valve is operated during the freezing season.
A common method is to drain water in pipes underground to prevent freezing.

At this time, of course you have to open the bell, but if you are using many bells, you have to open all the bells one by one, which is very troublesome. There was also a freezing accident caused by forgetting to open the door, which did not stop later.

For this reason, so-called intake valves are also used, which automatically suck air when the drain valve is closed without having to open the valve each time.However, the conventional type uses a gate-shaped pipe with bent parts at the top and bottom. However, when applying it to existing piping, it is necessary to replace the collar, which increases the cost, so conventional collars cannot be used. There was a demand for a low-cost fitting that could be connected directly to the

The object of the present invention is to provide an automatic water draining joint that satisfies the above requirements.

The present invention will be described below with reference to an embodiment shown in the accompanying drawings.

FIG. 1 is a diagram of the device of the present invention, showing an example of the above-mentioned gate-shaped piping.

In the figure, 1 is a drain valve, 2 is a conventional collar, 3 is an automatic drain joint of the present invention, 4 is piping from the drain valve 1 to the collar 2, and 5 is a conventional intake valve.

Fig. 2 is a cross-sectional view showing an embodiment of the automatic water drain joint of the present invention when water is flowing. 6 is a body of the automatic water drain joint of the present invention, and one end has a connection that is connected to the existing piping with a male thread. It has a T-shaped structure with a port 7 at the other end, a connection port 8 connected to the conventional collar 2 by a female screw, and a drain chamber 9 at the bottom.

The body 6 has a water supply channel 10 bored therein which communicates the existing piping 4 and the collar 2, and further has a communication channel 11 opened to the water supply channel 10 that communicates with the interior of the drainage chamber 9.

Reference numeral 12 designates a drain valve housed in the drain chamber 9, which has a collar portion 13 at its upper end that serves as a guide when moving up and down, and an O-ring 14 attached to its lower end.

Reference numeral 15 designates a pedestal for a spring 17 mounted in a groove 16 in the drain chamber 9, and a commercially available snap ring whose shape is shown in FIG. 3 is used.

In other words, the drain valve 12 is held in its collar portion 13 by the spring 17.
is locked and an upward force is applied.

Reference numeral 18 designates a plug that is adjustable and screwed together with a screw 19 at the lower end of the drain chamber 9. The plug has a tapered part on its upper surface to serve as a valve seat 20 on which the drain valve 12 is seated, and a drain hole 21 is bored in the center. ing.

Note that 22 is an O-ring for preventing water leakage, and 23 is a driver groove for adjusting the plug.

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

FIG. 2 shows the drain valve 1 in an open state, and in this state, the drain valve 12 is pressed downward by water pressure.
The O-ring 14 is in close contact with the valve seat 20 to prevent water from flowing out from the drain hole 21.

This state is maintained regardless of whether the collar 2 is opened or closed.

From this state, if the drain valve 1 is operated to drain water with the drain valve 2 closed, the downward water pressure on the drain valve 12 disappears, and the restoring force of the spring 17 causes the drain valve 12 to open. In order to create a gap between the valve seat 20 and the valve seat 20, the water in the upstream piping of the intake valve 5 is discharged to the drain valve 1 side in the state shown in FIG. The water in the collar 2 passes through the gaps between the water supply channel 10, the communication path 11, and the spring 17, and is discharged from the drain hole 21 to a sink or the like, so that no water remains in the piping 4 and the collar 2.

However, in this case, even if the drain valve 1 is set to the drain state, the water pressure of the head difference between the intake valve 5 and the valve seat 20 remains at the drain valve 1.
2, the spring 17 needs to be strong enough to overcome the water pressure, and when the drain valve 12 rises and water begins to flow from the drain hole 21, the flow of water The strength of the spring 17 and the distance between the drain valve 12 and the valve seat 20 are adjusted so that the drain valve 12 does not block the drain hole 21 and that the drain valve 12 is sufficiently seated on the valve seat 20 even under normally considered low water pressure. It is necessary to determine the distance or the size of the drain hole 21, so the plug 18 is moved up and down by a screw 19, so that the strength of the spring 17 when the drain valve 12 is pressed against the valve seat 20 can be changed as appropriate. ing.

Next, when the present invention is not used for a gate type piping as shown in Fig. 1, but also for a piping in which all the water in the piping is discharged to the drain valve 1 side, the present invention can also be used in front of the drain valve 2. Then, when the drain valve 1 is closed, the drain hole 21 becomes the intake hole, and when the drain valve 2 is opened, all the water in the pipes is similarly discharged to the drain valve side, and some water is Only the water will be discharged from the drain hole 21.

The present invention has been explained above based on the embodiments, but in addition to this, for example, the body 6 may be made into an elbow shape instead of a T-shape to shorten the distance between the existing piping and the drain chamber 9.
Rather than attaching the O-ring 14 to the drain valve 12, the O-ring 14 is attached to the tapered valve seat 20.
, or use an ordinary flat packing instead of an O-ring, or use specially shaped rubber, or make the drain valve 12 itself a certain shape of rubber, etc. Design changes are free to the extent that they do not deviate from the gist of the above.

As described above, in this invention, there is no need to open the drain valve 1 each time when draining water, so the operation is not cumbersome, and there is no freezing accident caused by forgetting to open the drain valve.Furthermore, it eliminates the problem of freezing accidents caused by forgetting to open the drain valve. It is possible to automatically drain the water in the pipe, as well as the water inside the collar.When applied to existing piping, there is no need to replace the collar, reducing costs, and the spring 1
Since a commercially available snap ring is used as the pedestal of valve 7, there is no need to divide the drain chamber 9 into pieces, which simplifies the structure.Also, since the valve seat 20 is tapered, there is less residual water. It is possible to provide a joint for automatic water drainage inside piping, which has the following effects.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the device of the present invention, FIG. 2 is a longitudinal sectional view showing one embodiment of the present invention, and FIG. 3 is a perspective view of a commercially available snap ring used in the present invention. be. 1...Drain cock, 2...Click, 6...
...Body, 7, 8... Connection port, 9...
...Drain chamber, 12...Drain valve, 15...
...Base, 17...Spring, 18...Plug, 20...Valve seat, 21...Drain hole.

Claims (1)

[Scope of utility model registration request] A drain valve has a connection port to the downstream piping at one end, a connection port to the drain valve at the other end, and a drain chamber below it.A drain valve supported by a spring is housed in the drain chamber, and the drain valve is At the bottom end of the chamber, a valve seat on which the drain valve is seated and a plug with a drain hole are screwed together in an adjustable manner, and when the drain valve is open, the spring is compressed by water pressure and the drain is For automatic water draining in piping, characterized in that when the valve seats on the valve seat and blocks the drain hole, and the drain valve is in the draining state, the drain valve separates from the valve seat due to the restoring force of a spring. Follow up.