JPH10185778A - Automatic drain discharge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic drain discharge device wherein a drain occurring under a constant pressure is automatically discharged while a sample line pressure is kept at a constant level without falling into a closed state. SOLUTION: Relating to an automatic drain discharge device wherein a gas is dehumidified with a dehumidifier 1 under pressurized state and the generated drain is automatically discharged, a valve mechanism 8 which, toward a lower stream of a drain line, discharges an accumulated drain when a specified level or more of drain is accumulated in a reservoir part 12, and a switching valve 9 which switches over to an open state so that a specified amount of drain among the accumulating drain is discharged to a drain discharge opening 7 in connection with discharge action of the valve mechanism 8, are provided in order, and further, the valve mechanism 8 comprises sensors 13 and 14 for level detection wherein it is detected that a drain is accumulated in the drain reservoir part 12 by specified level or above and the switching valve is switched over to open state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a dehumidifier such as an electronic cooler or a drain separator to dehumidify pressurized gas and automatically drains condensed water generated at the bottom of the dehumidifier. The present invention relates to an automatic drain discharge device that discharges water to a drain.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional apparatus of this type. In FIG. 4, when the drain generated in the electronic cooler 31 during the measurement is discharged, for example, a part of the sample gas S flows out of the drain line at the same time as the drain is discharged to cause a temporary pressure drop in the sample line, and the analyzer 37
A capillary 32 is provided below the electronic cooler 31 so that no indication error or the like occurs, and the drain is pressure-fed to the drain line by the pressure supplied by the suction pump 33 of the sample gas S. The drain is suctioned by a pump 34 provided downstream, whereby
A certain amount of drain was continuously discharged from the drain outlet 35. In addition, 36 is a filter provided in the sample line, 38 is a needle valve, and 39 is a capillary.

[0003]

As described above, since the capillary 32 is provided in the drain line, the constant pressure of the sample line is not changed. However, since the inside diameter is extremely small, the inside of the capillary 32 is clogged due to foreign matter entering. And the drain may not be continuously discharged.

[0004] The present invention has been made in consideration of the above-mentioned matters, and an object of the present invention is to provide a method in which a drain generated under a constant pressure is applied while maintaining the pressure of a sample line constant.
It is another object of the present invention to provide an automatic drain discharge device that can automatically discharge without falling into a closed state.

[0005]

In order to achieve the above object, the present invention is to dehumidify a gas under a pressurized state with a dehumidifier,
In an automatic drain discharge device for automatically discharging generated drain, a valve mechanism for discharging the collected drain when drain of a predetermined level or more accumulates in a reservoir toward a downstream of a drain line, and a valve mechanism for the valve mechanism. A switching valve for switching to an open state so as to discharge a predetermined amount of the drain of the collected drain to the drain discharge port in conjunction with the discharging operation, further comprising: And a level detecting sensor for detecting that a predetermined level or more of the switching valve is accumulated and switching the switching valve to an open state.

[0006]

According to the present invention, it is detected by the level detecting sensor that the drain has accumulated in the drain reservoir of the valve mechanism at a predetermined level or more, the switching valve is operated to open, and the drain discharged from the drain reservoir is detected. A predetermined amount can be automatically discharged without falling into the drain discharge port via the switching valve.

That is, since the switching valve and the other drain lines have a larger inner diameter than the capillary, the drain can be discharged without being blocked even by a small amount of foreign matter.

Further, since not all of the drain discharged from the drain reservoir is discharged from the switching valve to the drain discharge port, only a predetermined amount of drain is discharged from the switching valve, so that a part of gas is simultaneously discharged. Outflow from the drain line can be prevented by the drain remaining in the drain line,
The pressure of the gas supply line can be kept constant even during drain discharge, and gas can be supplied to the analyzer at a constant pressure.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the entirety of an automatic drain discharge device according to the present invention. In FIG. 1, reference numeral 1 denotes an electronic cooler as a dehumidifier, which includes a passage a for dehumidifying a sample gas S, a passage b for a dehumidified sample gas S, and a passage c for a generated drain. It is arranged on the outlet side of the suction pump 3 for sucking the gas S. The suction pump 3 is arranged to pump drain generated by dehumidification of the sample gas S to a drain line. On the other hand, the electronic cooler 1 and the analyzer 4
In between, a regulator 5 and a capillary 6 for adjusting pressure are arranged, whereby the sample gas S is supplied to the analyzer 4 at a constant pressure.

The drain line of the electronic cooler 1 has a drain outlet 7 at the most downstream side.
A valve mechanism 8 and a two-way solenoid valve 9 are sequentially arranged from the electronic cooler 1 toward the drain outlet 7.

Further, the valve mechanism 8 has a float 10 having a large-diameter portion 10a located at an upper portion and a small-diameter portion 10b located at a lower portion, and the float 10 is located at an inner central portion. A glass tube (drain reservoir) 12 communicating with the drain passage c and a lower tube 12b communicating with the solenoid valve 9 via the pipe 11 is detected. A pair of photoelectric sensors (sensors for level detection) 15 including a light emitting unit 13 and a light receiving unit 14 for switching the valve 9 to the open state. The light emitting unit 13 and the light receiving unit 14 are the lower tube 1 of the glass tube 12.
2b, it is arranged opposite to the outer periphery.

A timer 16 controls the drain discharge time to the drain outlet 7 and is provided between the photoelectric sensor 15 and the switching valve 9. That is, the timer 16
By controlling the time of the open state of the solenoid valve 9, a predetermined amount of the drain collected in the glass tube 12 can be discharged to the drain outlet 7. That is, the time during which the solenoid valve 9 is open is set by the timer 16 so that the sample gas S does not flow simultaneously when the drain is discharged.

As shown in FIG. 2, the upper tube 12a of the glass tube 12 has a larger diameter than the lower tube 12b, while the large diameter portion 10a of the float 10 has The small-diameter portion 1 of the float 10 is inserted into the pipe 12a.
0b is inserted into the lower tube 12b, and the drain is discharged until the drain of a predetermined level is accumulated in the glass tube 12.
0, the valve mechanism 8 keeps the closed state, and when a drain of a predetermined level or more accumulates, the float 10 floats up, the valve mechanism 8 is opened, and the drain is removed from the pipe 1.
The exhaust gas is discharged to the solenoid valve 9 side through 1.

FIG. 2 shows the closed state of the valve mechanism 8 at the time of measurement, whereby part of the sample gas S does not flow out of the drain line. The light from the light emitting section 13 is blocked by the small diameter section 10b, the light receiving section 14 does not operate, and the solenoid valve 9 remains closed.

When the valve mechanism 8 is closed during the measurement, the solenoid valve 9 of the drain line is closed. When the float discharged from the electronic cooler 1 accumulates at least at a predetermined level and the float 10 floats, the light from the light emitting unit 13 which has been shielded by the small diameter portion 10b is input to the light receiving unit 14 and the photoelectric sensor 15 operates. Then, the solenoid valve 9 is switched from the closed state to the open state, and the drain can be discharged to the drain outlet 7 with the pressure supplied by the intake pump 3.

In this case, since the time during which the solenoid valve 9 is open is controlled by the timer 16, not all of the drain discharged from the glass tube 12 is discharged to the drain outlet 7, but rather a predetermined amount of drain. Can be discharged from the solenoid valve 9 and a part of the sample gas S can be prevented from flowing out of the drain line at the same time by the drain remaining in the drain line (see the symbol D in FIG. 2). The pressure can be kept constant, and the sample gas S can be supplied to the analyzer 4 at a constant pressure.

Further, since the solenoid valve 9 and the pipe 11 have a larger inner diameter than the capillary, the drain can be discharged without being blocked even by a small amount of foreign matter.

FIG. 3 shows another embodiment of the present invention applied to a double-cell type fluid modulation type analyzer. That is, the automatic drain discharge device of the present invention is arranged on both the sample line and the reference line. In FIG. 3, the same components as those shown in FIGS. 1 and 2 are the same or equivalent.

In FIG. 3, reference numeral 20 denotes an inlet for a reference gas (for example, a zero gas such as nitrogen gas) R. I do. In addition, 2
5 is a drain line for the sample gas S, 26 is an electronic cooler, a passage a 'for dehumidifying the humidified reference gas R, and a passage b' for the dehumidified reference gas R.
And the generated drain passage c ′. Reference numerals 27 and 28 denote a double-cell type fluid modulation type analyzer and a drain pot, respectively.

Also in this embodiment, the drainage generated in both the sample line and the reference line is drained under pressure using the suction pumps 3 and 3, respectively, so that the sample gas S and the reference gas R are temporarily discharged. Pressure can be prevented, and the occurrence of indicating noise in the analyzer 27 can be prevented, and the measurement accuracy can be improved. In addition, the drain can be discharged without closing the drain lines 23 and 25 even if some foreign matter is mixed.

[0021]

As described above, according to the present invention, it is detected by the level detecting sensor that the drain has accumulated in the drain reservoir of the valve mechanism at a predetermined level or more, and the switching is performed in the closed state at the time of measurement. By operating the valve in the open state, the drain discharged from the drain reservoir can be automatically discharged by a predetermined amount through the switching valve without falling into the drain discharge port.

Further, it is possible to prevent a part of the gas from flowing out of the drain line at the same time by the drain remaining in the drain line, and to keep the pressure of the gas supply line constant even during drain discharge, so that the gas is supplied to the analyzer at a constant pressure. Can be supplied.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an overall configuration showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a main part configuration in the embodiment.

FIG. 3 is an explanatory view of the overall configuration showing another embodiment of the present invention.

FIG. 4 is an explanatory diagram of the entire configuration showing a conventional example.

[Description of Signs] 1 ... Electronic cooler, 3 ... Intake pump, 4 ... Analyzer, 7 ... Drain outlet, 8 ... Valve mechanism, 9 ... Electromagnetic valve, 10 ... Float, 13 ... Light emitting unit, 14 ... Light receiving unit , S: sample gas.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masahiko Fujiwara 2 Higashi-cho, Kichijoin-gu, Minami-ku, Kyoto, Kyoto Inside Horiba, Ltd.

Claims (3)

[Claims] 1. An automatic drain discharge device for dehumidifying a gas with a dehumidifier under a pressurized state and automatically discharging generated drain, wherein a drain of a predetermined level or more is stored in a reservoir toward a downstream of a drain line. A valve mechanism for discharging the accumulated drain when accumulated, and a switching valve for switching to an open state so as to discharge a predetermined amount of the accumulated drain to the drain outlet in conjunction with the discharging operation of the valve mechanism. Are sequentially provided,
Further, the valve mechanism includes a level detecting sensor for detecting that the drain has accumulated in the drain reservoir at a predetermined level or more and switching the switching valve to an open state. 2. The valve mechanism according to claim 1, further comprising a float that suppresses drainage until a predetermined level of drain is accumulated in the drain reservoir, and floats up when the predetermined level or more of the drain is accumulated to discharge the drain to the switching valve side. The automatic drain discharge device according to claim 1, wherein 3. The drain discharge time is controlled by a sensor interposed between the level detection sensor and the switch valve so that the predetermined amount of drain is discharged from the switching valve to the drain discharge port. The automatic drain discharge device according to claim 1 or 2.