JPH04242585A - Drainage device for water storage tank - Google Patents

Abstract

PURPOSE:To make it possible to drain water in a short pipe also without residue at the time of drainage by a method wherein a partitioning piece which divides a horizontal passage of a short pipe is provided just like being inserted from a water storage tank side to the short pipe, for a drainage device for a water storage tank for which a short pipe which is closed to the outside is projected in the horizontal direction. CONSTITUTION:A partitioning piece 10 is inserted in the horizontal direction in such a manner that it goes through a connection pipe 2 from a hot water storage can body 1, and divides the internal passages of the connection pipe 2 and a short pipe 3 into the top and bottom. When a drainage valve for the hot water storage can body 1 is opened, the water level in the can body 1 descends to a projecting position of the short pipe 3. Under this condition, an upper side passage 21 which is divided by the partitioning piece 10 is cut off from the circulation of water at the entrance. In the meantime, a lower side passage 22 is still connected with water in the hot water can body 1. Since the connection between the lower side passage 22 and the water in the can body 1 is maintained by the existence of the partitioning piece 10 even when the water level descends further/ the water continuously flows out to the hot water storage can body 1 from the lower side passage 22, and water in the short pipe 3 is drained.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water draining device for a water tank in which a short pipe closed to the outside projects horizontally.

0002

2. Description of the Related Art FIG. 6 shows a sectional view of the main part of a hot water storage can with short pipes projecting in the horizontal direction, as an example of a conventional water storage tank. In FIG. 6, 1 is a hot water storage can body in which hot water is stored. There is a drain valve at the bottom (not shown), and when this valve is opened, the hot water in the hot water storage can 1 is drained. Reference numeral 2 denotes a connecting pipe welded to the hot water storage can body 1, which projects horizontally. A short pipe 3 is fitted into the connecting pipe 2, and serves as a safety valve having a diaphragm valve 4. In this safety valve, when the pressure inside the hot water storage can 1 rises abnormally, the diaphragm valve 4 opens to release the internal pressure to the outside. Normally, the diaphragm valve 4 is closed and blocked from the outside.

0003

[Problems to be Solved by the Invention] However, in the conventional device described above, when the water inside the hot water storage can body 1 is drained, the water in the short pipe 3 is not drained well and remains in the short pipe 3 as it is, which is a drawback. was there. Moreover, in order to drain the water in the short pipe 3, it was necessary to open the diaphragm valve 4 each time.

Therefore, the present invention solves the above-mentioned drawbacks of the prior art, and even in a water storage tank such as a hot water storage can in which a short pipe closed to the outside is installed horizontally, the short pipe is removed when draining water. To provide a water draining device for a water tank that can drain water without leaving any water in the pipe.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the water tank water draining device of the present invention is a water tank water draining device in which a short pipe that is closed to the outside projects horizontally. The present invention is characterized in that a partition piece is inserted into the short pipe from the water storage tank side and partitions the horizontal passage of the short pipe in the vertical direction.

[0006]

[Operation] The partition piece inserted from the water tank side allows
The horizontal passage within the short pipe is partitioned into upper and lower sections. When the water level in the water tank is lowered by opening the drain valve and reaches the protruding position of the short pipe, due to surface tension, etc., the upper passage of the partitioned short pipe is at its entrance, and the water flow is interrupted. is interrupted. However, the lower passage of the short tube continues to be continuous with the water in the reservoir, and this continuity cannot be easily broken due to the presence of the partition piece. The water in the short pipe can therefore flow out of the lower passage into the water reservoir under the force of gravity.

[0007]

[Embodiment] Fig. 1 is a cross-sectional configuration diagram showing one embodiment of a water storage tank water draining device according to the present invention, Fig. 2 is a cross-sectional view taken along line A-A in Fig. 1, and Figs. It is.

In FIGS. 1 and 2, reference numeral 1 denotes a hot water storage can serving as a water storage tank, which is used as a hot water storage can of a water heater. A connecting pipe 2 is horizontally welded to the side wall of the hot water storage can 1, and a short pipe 3 serving as a safety valve is fitted into the connecting pipe 2 in the horizontal direction. Here, horizontal direction does not mean completely horizontal, but in a broader sense, it refers to a state in which the object extends laterally. 5 is a quick fastener used for fitting, and 6 is an O-ring. The diaphragm valve 4 always closes the opening 8 with a spring 7, and when the pressure inside the hot water storage can 1 rises abnormally, pressure is applied through the diaphragm 9 and the opening 8 is opened.

In such a device, a partition piece 10 is provided in the present invention. This partition piece 10 is the hot water storage can body 1
It is inserted horizontally so as to penetrate the connecting pipe 2 from the side, and partitions the inner passages of the connecting pipe 2 and the short pipe 3 into upper and lower sections. Further, the partition piece 10 is partially fixed to the connecting pipe 2 or the like. When the partition piece 10 is inserted, it protrudes from the connecting pipe 2 into the hot water storage can body 2 and into the short pipe 3, respectively.

In the above configuration, when the drain valve (not shown) of the hot water storage can body 1 is opened, the water level in the can body 1 decreases, and the water level in the can body 1 decreases from the state shown in FIG. become. In this state, water circulation is cut off at the entrance of the upper passage 21 partitioned by the partition piece 10. On the other hand, the lower passage 22 continues to be continuous with the water in the hot water storage can 1. Even if the water level further decreases, the presence of the partition piece 10 maintains the continuity of the water in the lower passage 22 and the can body 1, as shown in FIG. Therefore, water continues to flow into the hot water storage can 1 from the lower passage 22, and the water in the short pipe 3 is emptied. If there is no partition piece 10, connecting pipe 2
The flow of water is easily interrupted at the inlet of the short pipe 3, and the water in the short pipe 3 is not discharged into the hot water storage can body 1.

[0011] The effect of the partition piece 10 can also be obtained when a short pipe 3 is attached to a water pipe or the like instead of the hot water storage can 1. In this case, if the water pipe etc. is narrow, the partition piece 10
It is effective even if it does not protrude too much into the water pipe. Also, the deeper the partition piece 10 penetrates into the short pipe 3, the better;
It is effective even if it does not protrude too much from the connecting pipe 2.

0012

Effects of the Invention According to the water tank water draining device according to claim 1, which has the structure and operation as described above in accordance with the present invention, the horizontal passage of the short pipe is vertically moved from the water tank side into the short pipe. Since the partition piece is inserted in the form of a partition, the surface tension against the passage hole is divided into two, and the partition piece maintains a continuous state of water between the lower passage and the water tank side for a long time.As a result, The water in the horizontally protruding short pipe can be sufficiently drained.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional configuration diagram showing one embodiment of a water tank draining device according to the present invention.

FIG. 2 is a sectional view taken along line AA in FIG. 1;

FIG. 3 is an explanatory diagram illustrating the function of draining water.

FIG. 4 is an explanatory diagram illustrating the function of draining water.

FIG. 5 is an explanatory diagram illustrating the function of draining water.

FIG. 6 is a cross-sectional configuration diagram of a conventional device.

[Explanation of symbols]

1　Hot water storage can body 2 Connecting pipe 3 Short tube 4 Diaphragm valve 10 Partition piece

Claims (1)

[Claims] 1. A water tank water draining device having a short pipe that is closed to the outside and protrudes horizontally, wherein the horizontal passage of the short pipe is vertically moved from the water tank side into the short pipe. A water draining device for a water storage tank characterized by having a partition piece inserted into the water tank.