JPH0743270A - Low pressure sample water sucking/feeding unit for water sampler - Google Patents

Abstract

PURPOSE:To simplify the structure and to suppress fluctuation in the properties of sample water being sucked without consuming any power. CONSTITUTION:The low pressure sample water sucking/feeding unit 40 is provided with a sample water extraction line 14 and a high pressure ejector line 50 for different line and low pressure extracted sample water is sucked and fed into the extraction line through the ejector effect of the ejector line. More specifically, noncontact coupling is established between the extraction line 14 and the ejector section 52 of the ejector line 50 through communication lines 54, 42 and a diaphragm operating section 60. The diaphragm operating section 60 is partitioned by a diaphragm 62 into first and second chambers 62, 64. The ejector line 50 is provided, on the downstream side thereof, with an automatic ON/OFF valve 56 whereas the extraction line 14 is provided, on the upstream side of the communicating part, with a check valve 44 and, on the downstream side thereof, with a check valve 46 and an accumulator 48.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sample water sampling device in a boiler plant of a power plant, etc., and particularly when the sample water to be extracted has a low pressure or is difficult to flow due to air bubbles, the sample water is sent to an extraction line. The present invention relates to a suction / delivery device.

[0002]

2. Description of the Related Art Generally, in the case of a sample water sampling apparatus, for example, a boiler plant sample water sampling apparatus, as shown in FIG. 3, the sample water 12 at the extraction point 10 is on the extraction line 14 due to its own pressure. Then, the sample water 12 is sequentially brought into a predetermined state of its temperature, pressure and flow rate through the cooler 16, the pressure reducer 18, various instruments 20a, 20b, 20c, the flow rate control valve 22 and the head vessel 24. It is arranged to be conditioned and fed to the analyzer 26.

[0003]

However, the low-pressure sample water suction / delivery device of the conventional sample water sampling device for the boiler plant described above has the following drawbacks.

[0006] Therefore, before describing the above-mentioned difficulties, generally speaking again, for example, when the sample water is not supplied when the boiler plant is stopped, a part of the sample water such as a pipe flows out, and the part flows to the portion. Air may collect. In this case, when the boiler plant is started, this air pool becomes bubbles in the sample water, so in the low-pressure sample water or in the downstream of the head vessel, the bubbles are not extruded and the sample water does not flow or flows. However, since the air bubbles are mixed in, the sample water cannot be analyzed.

Further, in the sample water sampling apparatus for a boiler plant, it is often desired to sample the boiler circulating water at a specific location even when the boiler has a low pressure at the time of startup. Therefore, in the conventional sample water collecting apparatus, in order to meet the above-mentioned demand, the suction / pressurization pump 30 (see FIG. 3) is provided on the extraction line 14 near the extraction point 10 to suck the low-pressure sample water. Then, the data is sent to the analyzer. If this pump (low-pressure sample water suction / delivery device) is not provided, the sample water supplied to the analyzer will be zero or insufficient at low pressure, and if air bubbles are mixed, it will be low pressure. It is clear that the bubbles are difficult to be extruded into the sample and the sample water is retained, so that the analysis is impossible or the analysis accuracy is lowered.

Therefore, next, the conventional low-pressure sample water suction /
The disadvantages of the delivery device, that is, the suction / pressure pump will be described. Since the above-mentioned conventional device is composed of a pump device at first, the structure is large and expensive, and relatively large power is required. Next, the solid content in the sample water may adhere to the pump, changing the properties of the sample water supplied, which may adversely affect the analysis result.

Therefore, an object of the present invention is to provide a sample water sampling device which has a simple structure, does not consume power, and does not change the properties of the sample water, and can prevent adverse effects on the analysis results. To provide a low-pressure sample water suction / delivery device.

[0008]

In order to achieve the above-mentioned object, the low-pressure sample water suction / delivery device of the sample water sampling device according to the present invention is provided with a sample water extraction line of the sample water sampling device. Has an ejector line of a different system,
It is characterized in that the sample water is sucked and delivered into the extraction line by the ejector effect of the ejector line when the sample water for extraction has a low pressure or bubbles are mixed.

In this case, the extraction line and the ejector line are connected in a non-contact manner via the diaphragm operating portion, whereby the sample water is alternately sucked into the extraction line by the intermittent ejector action of the ejector line. It can be configured to deliver. Further, an accumulator that absorbs the pulsation of the sample water can be provided in the sample water delivery section of the extraction line.

[0010]

In the present invention, the low-pressure sample water is sucked and delivered into the extraction line by the ejector effect of the ejector line. That is, the low-pressure sample water suction / delivery device is composed of an ejector device. Then, the ejector device and the extraction line are connected in a non-contact manner via the diaphragm operating portion.

Therefore, according to the suction / delivery device of the present invention, it is clear that the structure is simple, power is not required, and the property of the sample water to be sucked is not unusual. Is.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a low-pressure sample water suction / delivery apparatus of a sample water sampling apparatus according to the present invention will be described in detail below with reference to the accompanying drawings. For convenience of explanation, FIG.
The same components as those of the conventional structure shown in are denoted by the same reference numerals, and detailed description thereof will be omitted.

First, the overall construction of the sample water sampling apparatus of the present invention will be described with reference to FIG. That is, it is basically the same except for the low-pressure sample water suction / delivery device 40 according to the present invention (shown by a chain double-dashed line for comparison with the conventional device 28). Therefore, the description of this entire configuration is omitted.

However, the low-pressure sample water suction of the present invention
As shown in FIGS. 1 and 2, the delivery device 40 supplies the sample water extraction line 14 with a fluid of a system different from that of the extraction line 14, such as cooling water or high-pressure sample water in another high-pressure extraction line. When the sample water 12 at the extraction point 10 has a low pressure, the low-pressure sample water 12 is sucked and delivered into the extraction line 14 by the ejector effect of the ejector line 50. Has been done.

Therefore, communication lines 54 and 42 are provided between the extraction line 14 and the ejector portion 52 of the ejector line 50.
Also, they are connected in a non-contact manner via the diaphragm operating portion 60. It should be noted that this operating portion 60 is used for the diaphragm 6
2 and a second chamber 64 that communicates with the extraction line 14 from the central portion thereof via the communication lines 54 and 42, respectively. Then, the ejector line 50 is provided with an automatic opening / closing valve 56 on the downstream side thereof, while the extraction line 14 is provided with a check valve 44 on the upstream side of its communication portion, and a check valve 46 and a check valve 46 on the downstream side thereof. Each accumulator 48 is provided.

Therefore, according to such a configuration, when the sample water 12 at the extraction point 10 has a low pressure, the automatic opening / closing valve 56 of the ejector line 50 is opened / closed to intermittently operate the ejector section 52. Thereby, the low-pressure sample water 12 in the extraction point 10 is sequentially sent to the extraction line sending part 14a.
That is, as shown in FIG. 1, when the automatic opening / closing valve 56 is opened, the high-pressure fluid flows in the ejector line 50, and a negative pressure is generated in the ejector section 52, this negative pressure causes the diaphragm operating section 60 to move to the first position. The low-pressure sample water 12 in the extraction point 10 is sucked from the extraction line 14 through the check valve 44 into the second chamber 66 in which the first chamber 64 is reduced and then expanded.

Next, as shown in FIG. 2, the automatic opening / closing valve 5
When 6 is closed and a positive pressure (high pressure) is returned to the inside of the ejector portion 52, the positive pressure expands the first chamber 64 of the diaphragm operating portion 60, and thereby reduces the inside of the second chamber 66. The sucked low-pressure sample water 12 is pressurized to a predetermined pressure and then sent to the extraction line sending unit 14a through the check valve 46. That is, the automatic opening / closing valve 5
By alternately opening and closing 6 and operating the ejector section 52 intermittently, the low-pressure sample water 12 in the extraction point 10 can be alternately sucked and delivered to the extraction line 14. In addition, the pulsation generated in the sample water to be sent at this time is similarly generated, and is easily absorbed or disappeared by the accumulator 48 communicating with the sending section 14a.

As described above, in the present invention, the low-pressure sample water is sucked and delivered into the extraction line by the ejector effect of the ejector line. Then, the ejector device and the extraction line are connected in a non-contact manner via the diaphragm operating portion. Therefore, according to the suction / delivery device of the present invention, unlike the conventional pump 30 (see FIG. 3), the structure thereof is simple, and at the same time, no power is required and the sample water to be sucked is The property does not change much.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and many design changes can be made without departing from the spirit thereof.

[0020]

As described above, the low-pressure sample water suction / delivery apparatus of the sample water sampling apparatus according to the present invention is arranged in the sample water extraction line of the sample water sampling apparatus in the ejector line of a system different from this extraction line. If the extracted sample water is at a low pressure or if air bubbles are mixed, this sample water is sucked and delivered into the extraction line by the ejector effect of the ejector line. By constructing the suction / delivery device from the ejector device, the ejector device and the extraction line are configured to be connected in a non-contact manner, and unlike the conventional device of this type including the pump and its accessory equipment, the configuration is different. It is simple and does not require power. Further, it is possible to reduce the change in the property of the sample water to be sucked.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of essential parts showing a state in which an ejector line is in operation, which is an embodiment of a low-pressure sample water suction / delivery device of a sample water sampling device according to the present invention.

FIG. 2 is a cross-sectional view of essential parts showing a state where the ejector line in the low-pressure sample water suction / delivery device shown in FIG. 1 is stopped.

FIG. 3 is a system diagram showing an overall configuration of a general sample water sampling device.

[Explanation of symbols]

 14 Extraction line 14a Delivery part 40 Suction / delivery device 42 Communication line 44,46 Check valve 48 Accumulator 50 Ejector line 52 Ejector part 54 Communication line 56 Automatic opening / closing valve 60 Diaphragm operating part 62 Diaphragm 64 First chamber 66 Second chamber

Claims (3)

[Claims] 1. A sample water extraction line of a sample water sampling device,
An ejector line of a system different from this extraction line is installed side by side, and when the extracted sample water has a low pressure or air bubbles are mixed, this sample water is sucked into the extraction line by the ejector effect of the ejector line. A low-pressure sample water suction / delivery device of a sample water sampling device characterized by being configured to deliver. 2. The extraction line and the ejector line are connected in a non-contact manner via a diaphragm operating portion so that the sample water is alternately sucked and delivered to the extraction line by the intermittent ejector action of the ejector line. The low-pressure sample water suction / delivery device of the sample water sampling device according to claim 1, which is configured. 3. An accumulator for absorbing the pulsation of sample water is provided in the sample water delivery section of the extraction line.
A low-pressure sample water suction / delivery device of the described sample water sampling device.