JPS5930841Y2 - Freezing prevention water drain device for stop gas appliances - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a water draining device for preventing freezing of gas appliances.

During the winter, gas appliances are damaged in many places due to freezing.

Particularly in the case of a first-stop device installed with piping such as an instantaneous water heater, water is always present inside the device, so it is difficult to prevent the device from being damaged when this water freezes in the winter.

Therefore, as a measure to prevent this damage, after using the conventional equipment, close the water supply valve and remove the water drain valve installed in one place in the pipe to drain the water inside the equipment, or A water draining device is used, but even when this automatic water draining device is used, the water supply valve is closed, the first stop valve is opened, and then the air intake port is opened to send air into the pipe and discharge it.

Therefore, three operations are performed, but in both cases, it is easy to forget, which leads to freezing and damage to the equipment.

In view of the above points, the present invention deals with this problem.
In other words, when the water supply is closed when the water in the container is finished using the device, the air that entered from the air intake port is automatically sent into the device, which communicates the inside of the device with the atmosphere, and removes the remaining water in the conduit. It is designed to discharge hot water using atmospheric pressure, and the purpose is to automatically drain water with one operation and completely prevent freezing.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a water draining device for preventing freezing of a stopper device according to the present invention will be described in detail below with reference to the drawings.

Reference numeral 1 denotes an operation main body, and the main body 1 is provided with a water supply port 2 and a supply port 5, and the supply port 5 has a conduit 4 connected to a heat exchanger 3 provided with a large number of fins f.

The water supply port 2 and the supply port 5 of the main body 1 are communicated through a chamber 6.

Further, the main body 1 is provided with an air chamber 8 having an air intake lower at the other end thereof, and this air chamber 8 communicates with the feeding port 5 side via a thin tube 9.

A chamber 10 containing an automatic valve 11 is provided on the side of the feed port 5 that communicates with the thin tube 9.

Further, the chamber 6 communicating with the water supply port 2 and the supply port 5 and the air chamber 8 communicating with the air intake lower have valve bodies 12 and 13 built in, respectively, and one valve of the valve bodies 12 and 13 is provided. The body 12 is attached to the operating rod 14, and the other valve body 13 is slidably fitted onto the operating rod 14 so as to be movable.

The operating rod 14 is supported by the main body so as to be movable in the lateral direction, and one end thereof extends outward from the main body 1.

Further, a spring 19 is provided between the valve body 12 and the main body 1,
This spring 19 moves the operating rod 14 and the valve body 12
This acts to bring the valve into contact with the valve seat 24.

The protruding tip of the operating rod 14 is opposed to a cam body 16 attached to a rotating shaft 15 via a contact plate 17.

Therefore, when opening the valve body 12, the cam body 16 pushes the operating rod 14 through the contact plate 17 to open it.

The abutting plate 17 is suspended by having one end pivotally supported by the support piece 18.

The valve element 13 in the air chamber 8 is slidably fitted onto the operating rod 14 as described above, and the valve element 13 is pushed against the valve seat 22 by the spring 21 interposed between the receiving plate 20 attached to the operating rod 14. is being pushed in the direction of

Further, the valve body 13 is received by the annular body 23 attached to the operation rod 14 by movement of the operation rod 14, and the valve body 13 is separated from the valve seat 22, and at this time, by the movement of the operation rod 14, it is fixed to the operation rod 14. The valve body 12 hits the valve seat 24 to shut off water in the chamber 6.

Further, as described above, the main body 1 is provided with a valve chamber 10 containing an automatic valve 11 on the side of the supply port 5, and this valve chamber 10 is connected to the air chamber 8 by an air capillary tube 9. When the valve body 12 is opened and water is sent out from the water supply port, the automatic valve 11 inside is pushed up by water pressure and closes the thin tube 9. When the valve 12 hits the valve seat 24 and shuts off, the water is discharged from the air chamber 8. It descends due to the air and the weight of the automatic valve itself and communicates with the thin tube 9 and the feed port 5.

The air chamber 8 of the main body 1 and the thin tube 27 are located near the outlet 260 of the hot water that has passed through the heat exchanger 3 equipped with the large number of fins f.
It is connected by .

Further, the conduit 4 connected to the feed port 5 leading to the heat exchanger 3 is provided with an automatic water draining device E in the passage.

The water draining device E is composed of two metal fittings provided through the small water drain hole 28, an automatic water drain valve 30 built in the metal fittings 29, and a spring 31 acting on the automatic water drain valve 30. is connected to conduit 4.

Therefore, when water pressure is applied, the automatic valve 30 works and contacts the valve seat, closing the small hole 28. When the water pressure disappears, the spring 31 pushes the automatic water drain valve 30 up and away from the valve seat, opening the small hole 28 and draining water. That's how it is.

In the figure, 32 is a main burner, which communicates with a gas conduit 34 from a main valve casing 33.

Since the present invention has the above-described structure, the valve body 12 is pressed against the valve seat 24 by the spring 19, and water supplied from the water supply port 2 of the main body 1 is blocked by the valve body 12 within the chamber 6 of the main body 1. When the cam body 16 is rotated by the rotating shaft 15, the cam body 16 moves the operating rod 14 against the spring 19 through the contact plate 17, and the valve body 12 attached to the operating rod 14 is removed. By opening away from the valve seat 24, the hot water is sent from the feed port 5 through the conduit 4 to the heat exchanger 3, where it undergoes heat exchange and becomes hot water, which is discharged from the tap port 26.

Also, when the valve body 12 is opened with the cam body 16, the valve body 1 in the air chamber 8 is opened.
3 is pushed against the valve seat 22 by the spring 21 by the movement of the operating rod 14, thereby closing the air passage.

Further, the automatic valve 11 in the chamber 10 provided on the side of the feed port 5 is pushed up by the water pressure on the side of the feed port 5 to close the passage of the thin tube 9.

Now, when the use of this appliance is finished, the gas valve leading to the main burner 32 is closed, or when the cam body 16 releases the pressure on the operating rod 14 by another operation, the chamber 6 in the main body 1 is closed.
The operating rod 14 moves to the left due to the repulsion of the spring 19, and the valve body 12 is pressed against the valve seat 24 to close the passage on the side of the feed port 5 and cut off water.

When the water passage is shut off, the automatic valve 11 in the chamber 10 falls under its own weight as water pressure is removed, opening the air passage of the thin tube 9. At the same time, the water pressure is removed and the automatic water drain valve 30 connected to the conduit 4 is pushed open by the force of the spring 31 to open the drain port.

Furthermore, the valve body 13 in the air chamber 8 is moved by the movement of the operating rod 14.
The operation rod 14 is attached to the ring body 23 attached to the operation rod 14.
By moving to the left, it separates from the valve seat 22 and opens the air passage.
The air entering from the air intake lower communicates with the atmosphere on the side of the supply port 5.

By communicating with the atmosphere, water remaining in the conduit 4 is forced out of the small hole 28 through the automatic drain valve 30.

Further, the air passing through the thin tube 27 at the opening of the valve body 13 is sent into the conduit near the outlet 26, and the hot water remaining in the heat exchanger 3 is passed through the automatic valve 30 which opens the water draining device E. small hole 2
Extrude from 8.

As described above, the present invention provides a valve body 12 for opening and closing the water passage between the water supply port 2 and the supply port 5 to which the conduit 4 passing through the heat exchanger 3 is attached in an instantaneous water heater or other stop gas appliance. It has a main body having a chamber 6 with a built-in air intake lower and an air chamber 8 with a built-in air opening/closing valve body 13. A capillary tube 9 communicates via an automatic valve, and the valve body 12 in said chamber 6 is furthermore connected to an operating rod 14 which is supported and moves laterally through the chamber 6 and the air chamber 8 in conjunction with the opening and closing means. When installed, the valve body 13 built in the air chamber 8 is slidably fitted into the operating rod 14, and a ring body 23 is provided to catch the valve body 13 during movement. The valve element 13 is provided with a spring 21 acting in the direction of the valve seat 22, and the conduit 4 attached to the feed port of the main body 1 is equipped with an automatic water drain valve and a spring that acts on the automatic valve. This is a water draining device for preventing freezing of gas appliances, which connects the equipment and is equipped with a thin tube 27 connected to the air chamber 8 of the main body 1 near the outlet of the conduit. Valve body 1 provided on the operating rod 14 at the opening/closing element stage of an on-off valve, etc.
2 is brought into pressure contact with the valve seat 24 to cut off the water supply, the water pressure on the side of the feed port 5 is removed, the automatic valve 11 in the chamber 10 and the automatic valve 30 in the metal fitting 29 open, and furthermore, the valve slid into the operating rod 14 opens. Body 13 also moves to the left to open the air chamber, sends the air from the air chamber intake lower to the supply port side, communicates the inside of the pipe with the atmosphere, and uses the air necessary for water removal to remain in the pipe. The water can be completely drained from the automatic drainage device by the action of atmospheric pressure.

Therefore, the water can be drained with one operation, and since the operation is not forgotten, it is effective in preventing freezing and damage even in winter.

[Brief explanation of the drawing]

The drawings show an embodiment of a water draining device for preventing freezing of gas appliances according to the present invention, and FIG. 1 is an explanatory diagram of the device;
FIG. 2 is an enlarged view of section A in FIG. 1, and FIG. 3 is an enlarged view of section B in FIG. 1... Operation body, 2... Water supply port, 3.
... Heat exchanger, 4 ... Conduit, 5 ...
...Feeding port, 6... Chamber, 7... Air intake port, 8... Air chamber, 9... Thin tube, 1
0... Chamber, 11... Automatic valve, 12.1
3...Opening/closing valve body, 14...Operation rod,
15...Rotating shaft, 16...Cam body, 1
7...Passing plate, 18...Support piece, 19.
...Spring, 20...Batch plate, 21.
... Spring, 22 ... Valve seat, 23.
... Ring body, 24 ... Valve seat, 26 ...
...Outlet, 27... Thin tube, 28...
Small hole, 29...Metal fitting, 30...Automatic valve, 31...Spring.

Claims (1)

[Scope of utility model registration request] In instantaneous water heaters and other first-stop gas appliances, a chamber with a built-in water passage opening/closing valve body between the water supply port and the supply port, and an air chamber with a built-in air opening/closing valve body and an air intake opening. The main body further includes a main body in which the air chamber and the feeding side are connected by a thin tube through an automatic valve provided on the feeding port side, and the water passage opening/closing valve body in the water passage side chamber is manually operated. Or, in relation to the gas on-off valve shaft, it is attached to an operating rod supported horizontally through both chambers,
Further, the water passage opening/closing valve is provided with a spring that biases it toward the valve seat, and an air opening/closing valve body built into the air chamber is slidably fitted to the other end of the operating rod, and the valve seat is attached to the valve body. A spring is provided to bias the operation rod in the direction, so that when the operation rod moves, it is received by a receiving ring provided at the end of the operation rod, and the supply port of the main body is connected to the heat exchanger and Connect the end of a conduit provided with an automatic drain valve and a water drain device equipped with a spring that acts on the automatic valve, and connect the conduit from the heat exchanger to the air chamber of the main body near the outlet. A water drain device for preventing freezing of gas appliances, which is made by connecting thin tubes.