JPH0716155Y2 - Air indicator for degassing in the pipeline - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an indicator adapted to detect an accumulated state of air accumulated in a pipe in a heat exchange coil or another water pipe in an air conditioning equipment.

[Conventional technology]

Conventionally, for example, an exhaust pipe b for air removal is provided in a pipe line a such as a radiator of an air conditioner shown in FIGS. 4A and 4B, and a plug c is provided at a tip opening of the exhaust pipe b as shown in FIG. It is already known to provide or provide an on-off valve d as shown in FIG. These are enough to remove the plug c or open the valve d to remove the air in the pipeline during the trial operation of the piping equipment, and to remove the air without checking the accumulated state of the air thereafter. , Especially without using a means for monitoring the state of pooling of air in the pipe c
Alternatively, it was only known that the air was accumulated due to the shock vibration generated when the valve d was opened.

[Problems to be solved by the invention]

Therefore, in the past, since there was no opportunity to detect the accumulated state of the air, there was a tendency to leave the air without having to feel the necessity of the air removal operation, and there is a lot of air in the pipe when left for a long time. It accumulates and causes a bad effect on the corrosion of the pipe wall, especially when the running water of the pipe has little heat demand, air bubbles,
There is little chance of sticking to the pipe wall and flowing out together with running water, and air easily accumulates in the pipe.

[Means for solving problems]

The present invention monitors the condition of the air accumulated in the pipe in order to eliminate the harmful effects caused by the air accumulated in the pipe and displays the amount of air accumulated in the pipe by means of a marker scale so that the state of the accumulated air in the pipe can be known by visual measurement. , It is designed to accurately indicate the operation time for air removal, and the exhaust pipe that communicates with the degassing port provided in the pipeline is equipped with open / close valves at the top and bottom, respectively, with an interval, and exhaust between both valves. A float that moves up and down in the pipe is provided, and a marking scale that displays the vertical movement position of the float is provided.

[Action]

In the present invention, the upper opening / closing valve (8) of the exhaust pipe (6) is normally used.
Is closed and the lower opening / closing valve (9) is kept open. In this state, water flows into the exhaust pipe part (6a) above the lower opening / closing valve (9) due to the water pressure in the pipe, and the float (10) Is pushed up as shown by the solid arrow in FIG. The air mixed in the pipe is carried by the flow of water to the exhaust pipe (6) side and collected there, but since the upper opening / closing valve (8) is closed, the float (1
Air gradually accumulates above the (0), and the air pressure causes the float (10) to be pushed down as shown by the dotted arrow in FIG.

Then, when the float (10) is pushed down to a predetermined position, for example, when it reaches the lower marking line (14) of the marking scale (13), the lower opening / closing valve (9) is closed and the upper opening / closing valve (9) is closed. 8) is opened, and the air accumulated above the float (10) is discharged to the outside through the upper opening / closing valve (8).

By the way, when the lower opening / closing valve (9) is not provided, if the upper opening / closing valve (8) is opened for air release while water is being passed through the pipe line, the water in the pipe line is exhausted by the water flow pressure to the exhaust pipe (6). Since it is jetted from the air, it is necessary to stop the flow of water to the pipeline when bleeding air, and when the pipeline is for air conditioning equipment, you have to stop the air conditioning every time you bleed air, but If the lower opening / closing valve (9) is provided as invented, the air can be vented by closing the valve (9) without causing a jet of water from the exhaust pipe (6) even when water is still flowing through the pipeline. can get.

After completion of air bleeding, if the upper opening / closing valve (8) is closed and the lower opening / closing valve (9) is opened, the float (10) is pushed up again by the flow of water into the exhaust pipe (6) due to the water pressure.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

In Fig. 1, (1) is a pipe line that constitutes a radiator in an air conditioning system, and headers (1a) (1b) are provided on both sides to flow the fluid from the supply port (2) to the discharge port (3). Then, the heat dissipation fin (4) is provided in the pipe line (1), the degassing port (5) is provided in the upper part of the header (1b) on the downstream side, and the exhaust pipe (6) is provided so as to communicate thereabove from above. . In the illustrated example, the end of the exhaust pipe (6) was made to communicate with the drain receiving part (7) of the container casing provided with the pipe passage (1).

The exhaust pipe (6) is provided with open / close valves (8) and (9) on the upper and lower sides of the exhaust pipe (6) with a space therebetween, and a transparent glass pipe (6a) is formed between the valves (8) and (9). , A spherical float (10) was housed inside so that it could move up and down.

In the illustrated example, the outer circumference of the glass tube (6a) is covered with a sheath tube (11) in order to prevent damage to the glass tube (6a). The sheath tube (11) has a float (10) inside the glass tube (6a). ) Is provided with a long window hole (12) so that it can be seen from the outside, and a scale (13) indicating the position of the float (10) is provided along the side edge of the window hole. ), But the sheath cylinder (1
If 1) is omitted, the marking line (14) is aligned with the scale (13).
Is applied directly to the glass tube (6a).

The glass tube (6a) is exchangeably and airtightly connected to the exhaust tube (6) so as to be connected so as to prevent water leakage.

The operation of the above configuration is as described above, and some fluid is discharged together with the air when the upper valve (8) is opened during the air removal operation, but the end of the exhaust pipe (6) is the drain receiver at the bottom of the device casing. The drainage water is treated because it opened in the section.

[Effect of device]

As is clear from the above description, according to the present invention, it becomes possible to easily visually check the accumulation state of air from the position of the float, and it is possible to easily and properly control the time of air removal and to collect the air accumulated in the pipe. It is possible to prevent the harmful effects caused by corrosion in the pipeline due to the fact that the air is vented to the pipeline by closing the lower opening / closing valve and opening the upper opening / closing valve during air removal work. Even during the period, the air can be drained without the possibility of spouting water from the exhaust pipe, and it is not necessary to stop the water flow to the pipe line one by one when the air is drained, and the air can be easily drained at any time.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a piping device to which the present invention is applied, FIG. 2 is a front view of essential parts, and FIG. 3 is a cutaway side view thereof.
4A and 4B are front views of the conventional device, respectively. (1) ... Piping line, (5) ... Degassing port, (6) ... Exhaust pipe (8) ... Upper valve, (9) ... Lower valve, (10) ... Float (13) ... Scale, (14) ... Marker line

Claims (1)

[Scope of utility model registration request] 1. An exhaust pipe communicating with a degassing port provided in a pipe line is provided with opening and closing valves respectively at upper and lower positions with a space therebetween, and a float that moves up and down in the exhaust pipe is provided between both valves and the upper and lower parts of the float are provided. An air indicator for degassing in the pipeline, which is provided with a marking scale for displaying the moving position.