JPS6223548Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a bubbler chamber in a pressurized gas line and pumps the pressurized gas through the bubbler liquid stored in the bubbler chamber to humidify or humidify the pressurized gas. The present invention relates to an improvement in a bubbler device used for dehumidifying or removing interfering components by causing a chemical reaction.

An example of the pressurized gas line described above is a calibration gas line for measuring automobile exhaust gas as shown in FIG. As is well known, this is used to send exhaust gas from automobile A as a sample gas to analyzer C via three-way switching valve B to measure a desired component to be measured, such as nitrogen oxides (NOx). , for the purpose of calibrating this analyzer C, is to send calibration gas such as zero gas and span gas from cylinder D to analyzer C, and sample gas that is generated and contained in this calibration gas due to combustion. A bubbler chamber E is interposed in the calibration gas line in order to provide a moisture condition equivalent to that inside the calibration gas line.

Conventionally, the bubbler chamber E is a tank-shaped chamber that stores a predetermined amount of bubbler liquid (in this case, water for humidification) F, as shown in FIG. 4, and has a gas inlet portion that communicates with the calibration gas line. The calibration gas flowing in from G is guided through a vertical pipe H into the bottom of the bubbler chamber, that is, into the bubbler liquid F, and is discharged, humidified, and then returned to the calibration gas line from the gas outlet I. There is. It goes without saying that the pressures at the gas inlet G and the gas outlet I are equal, and the relationship P ₁ = P ₂ ensures smooth flow of the calibration gas.
However, when the gas inlet G is opened to the atmosphere and the pressure P ₁ becomes equal to atmospheric pressure, such as when the cylinder D is removed from the calibration gas line to replace the cylinder D, the pressure balance becomes P ₁ < P ₂ The bubbler liquid F in the bubbler chamber E is caused by the backflow of this difference in gas pressure.
rapidly and in a torrent flow from the chamber E through the gas inlet G and outflow from the upstream end of the calibration gas line. If the bubbler fluid F is water as described above, all that is required is the contamination of the surrounding area due to this leakage and the complicated means of refilling the bubbler fluid F, but if the bubbler fluid F is sulfuric acid for dehumidification, etc. This may infiltrate other parts, causing corrosion, etc., and is extremely dangerous to the human body of workers.

In view of such practical inconvenience, the present invention provides a bubbler device that can effectively prevent the bubbler liquid from flowing out from the pressurized gas line even when the pressure balance collapses as described above. It was devised with the aim of
The inner bottom of the bubbler front chamber is recessed toward the lower end of the communication pipe suspended in the bubbler front chamber.

Hereinafter, the details of the present invention will be explained based on the drawings. As shown in Fig. 1, a bubbler front chamber 3 is provided at the upstream front stage of the bubbler chamber 1 with a partition wall 2 in between, and the bubbler front chamber 3 has a volume equal to or larger than the inner volume of the bubbler chamber 1. At the same time, a communication pipe 4 is provided which penetrates the partition wall 2 and extends between the two chambers 1 and 3, and both ends 4a and 4b of the communication pipe 4 extend in a vertical tube shape toward the inner bottoms 1a and 3a of the respective chambers 1 and 3. In particular, in the bubbler front chamber 3, a concave portion 5 having a diameter slightly larger than the outer diameter of the communicating tube 4 is provided in the center of the inner bottom portion 3a, and the above-mentioned end portion 4 is bent and lowered.
It is constructed so that a part of it protrudes. In other words,
The end portion 4a is made to overlap the inner bottom portion 3a. A gas inlet part 6 is formed at the upper end of the bubbler front chamber 3, and a gas outlet part 7 is formed at the upper end of the bubbler chamber 3. 8. For example, water is stored.

Therefore, the pressurized gas fed through the pressurized gas line is discharged from the gas inlet 6 through the bubbler front chamber 3 and into the bubbler liquid 8 from the communication pipe 4, thereby meeting the necessary conditions such as humidification. The pressurized gas that has been given or removed under certain conditions is returned to the pressurized gas line from the gas outlet 7. In this state, it is natural that the pressure P ₁ on the bubbler front chamber 3 side and the pressure P ₂ on the bubbler chamber 1 side are balanced, but the gas inlet 6 is released to atmospheric pressure for some reason, so the pressure balance The bubbler liquid 8 flows into the communication pipe 4 and overflows from the bubbler chamber 1 due to the backflow of the gas pressure difference.
Since the gas flows out from the bubbler front chamber 3 from the gas inlet part 6, it is prevented from flowing out from the gas inlet part 6 as in the conventional case.
At this time, the overflowing bubbler liquid 8 flows into the bubbler front chamber 3 rapidly and in a torrent state due to the above-mentioned pressure difference.
In the front chamber 3, the bubbler liquid 8 violently collides with the inner bottom part 3a, scatters, and moves turbulently, so that a part of the liquid 8 may flow into the gas inlet part 6. Making the internal volume of the bubbler front chamber 3 slightly larger than that of the bubbler chamber 1 as described above absorbs such violent movement of the bubbler liquid 8 and prevents it from flowing into the gas inlet section 6. It is effective in doing so.

When substantially all of the bubbler liquid 8 has overflowed into the bubbler front chamber 3, the pressure is again balanced as P ₁ =P ₂ . next,
If pressurized gas is allowed to flow through the pressurized gas line, the pressure balance will collapse as P ₁ < P ₂ , and therefore the overflowing bubbler liquid 8 in the bubbler front chamber 3 will flow back to the bubbler chamber 1 via the communication pipe 4. , a concave part 5 is formed in the inner bottom part 3a of the front chamber 3, and the end part 4a of the communicating tube is pushed into this concave part 5 so that the end part 4a overlaps with the inner bottom part 3a. At 5, the flow rate of the bubbler liquid 8 that is about to flow into the end 4a increases dramatically, and due to the force of the flow rate, almost all of the bubbler liquid 8 in the front chamber 3 is sucked into the communication pipe 4 and refluxed. reach. Incidentally, instead of forming this recessed part 5, the bubbler front chamber bottom part 3a is shaped into an inverted conical shape as shown in FIG. 2, and the communicating pipe end part 4a is configured to face the deepest part at the center. You can. As described above, almost all of the bubbler liquid 8 is automatically returned to the bubbler chamber 1 by flowing the pressurized gas again, and thereafter the same humidification process is applied to the pressurized gas.

As described above, according to the present invention, even if the pressurized gas line is released to atmospheric pressure for some reason, the bubbler liquid that overflows from the bubbler chamber due to the pressure difference caused by this is discharged from the pressurized gas line to the outside. Since the bubbler liquid is received and stored in the bubbler front chamber without causing any damage and absorbs the pressure difference between the upstream and downstream sides of the pressurized gas line, it eliminates contamination around the pressurized gas line due to the discharged bubbler liquid.
It is useful because it eliminates the need to refill the bubbler liquid, and it has great merits, especially in that it eliminates damage and corrosion to various equipment and parts caused by infiltration of bubbler liquids such as sulfuric acid, and eliminates harmful effects on the human body. .

Furthermore, when the pressurized gas is supplied to the pressurized gas line again, the overflowing bubbler liquid in the bubbler front chamber is automatically returned to the bubbler chamber, and in particular, the inner bottom of the bubbler front chamber is suspended into the bubbler front chamber. Since the lower end of the communication pipe is recessed toward the lower end, the flow rate of the bubbler liquid that is about to flow into the lower end increases dramatically, and due to the momentum of this flow rate, almost all of the bubbler liquid in the bubbler front chamber is Since it is sucked into the communication pipe and refluxed to the bubbler chamber, it can be used continuously, and no special manual operation is required for this reflux, making it easy to handle and save labor.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view showing an embodiment of the bubbler device according to the present invention, Fig. 2 is a longitudinal side view showing a modification thereof, and Fig. 3 is an automatic exhaust gas measuring device as an example of a pressurized gas line. FIG. 4 is a longitudinal cross-sectional side view of a conventional bubbler device. 1...Bubble anterior chamber, 3...Bubble anterior chamber, 3a...
...Inner bottom of bubbler front chamber, 4...Communication pipe, 4a...
The lower end of the communication pipe hanging down to the bubbler front chamber, 8...
Bubbler liquid.

Claims (1)

[Scope of utility model registration request] A bubbler chamber is provided in the pressurized gas line, and the pressurized gas is fed through the bubbler liquid stored in the bubbler chamber, and an overflow bubbler front chamber is provided at the upstream stage of the bubbler chamber, and both chambers are connected to each other. are communicated by a communication pipe, and the inner bottom of the bubbler front chamber is connected to the
A bubbler device for a pressurized gas line, characterized in that a lower end of the communication pipe suspended in the bubbler front chamber is recessed toward the bottom.