JPH0434440Y2 - - Google Patents

Description

[Detailed explanation of the invention] <Industrial application field> This invention samples raw water, water treated in each process, etc. at water purification plants, sewage treatment plants, and other water treatment facilities, and guides them to water quality testing laboratories. This relates to the improvement of sampling equipment for water quality testing, which tests the quality of raw water, water treated in each process, etc.

<Prior art> Conventional sampling equipment for water quality testing samples raw water 1 and each process treated water 3 of each treatment process 2 with a pump 4 through a sampling pipe 5 and a valve 6, as shown in FIG. 4, for example. The sampled raw water 1 and each process treated water 3 (hereinafter referred to as Water (referred to as sampling water) was collected in beakers, etc., and tests such as water quality analysis were conducted. However, since sampling water is constantly being sprayed onto the sink 7, there are disadvantages in that the area around the sink 7 gets dirty due to water splashes, and the humidity in the water quality test chamber increases, which adversely affects the analytical instruments. Note that there is also a method of stopping the pump 4 and closing the valve 6 during normal times, and then operating the pump 4 corresponding to the necessary sampling water and opening the valve 6 only when water sampling is required. When the pump 4 is stopped, water accumulates in the pump 4 and the sampling tube 5, so in order to sample water correctly, it is necessary to spray water for a certain period of time during water sampling to flush out the accumulated water in the pump 4 and the sampling tube 5. In addition, suspended solids in the accumulated water adhere to and precipitate on the inner walls of the pump 4 and the sampling tube 5, which sometimes separate and flow out, resulting in inaccurate water sampling. This has disadvantages, such as the inability to visually confirm turbidity fluctuations, etc., because of the lack of

Therefore, in water treatment plants, sewage treatment plants, and other water treatment facilities, sampling water must be continuously released.

<Problems to be solved by the invention> The invention was developed in view of the above-mentioned drawbacks, and by continuously supplying sampling water but not discharging water onto the sink during normal times, The purpose is to provide sampling equipment for water quality testing that prevents water splashing in the sink, increased humidity in the water quality testing chamber, and stagnation of water in the pump and sampling pipe, and also allows visual observation of the sampling water at any time. shall be.

<Means for solving the problem> The present invention provides a three-way valve at each end of a plurality of corresponding sampling pipes in sampling equipment for water quality testing that samples raw water, water treated in each process, etc. A water sampling pipe for collecting sampling water is connected to one end of the outflow side of the valve, and a water sampling pipe for continuously discharging sampling water is connected to the other end of each three-way valve on the outflow side. The present invention relates to sampling equipment for water quality testing, characterized in that it is connected to a common observation tank that is transparent and at least partially transparent.

<Operation> The present invention will be explained below based on the drawings. 1st
The figure is a flow explanatory diagram showing an example of an embodiment of the present invention,
FIG. 2 is a front explanatory view showing an example of the implementation around the three-way valve and observation tank, and FIG. 3 is a longitudinal cross-sectional view showing the A-A cross section in FIG. A three-way valve 8 is provided at the end of each sampling pipe 5 having a pump 4 for sampling the process-treated water 3, and a water sampling pipe 9 is connected to one end of the outflow side of each three-way valve 8, and the sampling pipe 9 is connected to the sampling pipe 9. A common observation tank 11 is connected to the other end of the outflow side of each three-way valve 8 via a water discharge pipe 10 and is made of a substantially sealed and at least partially transparent material. The observation tank 11 is used as a tank for visually observing the sampled water.
Further, a drain pipe 12a for discharging the sampling water that has flowed into the observation tank 11 is connected to the observation tank 11, and the drain pipe 12a is connected to a drain pipe 12b for discharging the water in the sink 7. The observation tank 11 used in this invention has a water discharge pipe 10 as shown in FIG.
Since the water discharge part 15 from the water discharge port 13 to the water surface 14 is used as the observation part of the sampled water, it is desirable to maintain a distance of about 50 to 100 mm. Therefore, the height of the observation tank 11 should be 100 mm or more. is desirable. According to the inventor's research, when seven sampling tubes are installed, the inner diameter is 140 mm.
By horizontally installing a transparent acrylic tube 11 mm in diameter to form the observation tank 11, the distance of the water discharge part 15 from the water outlet 13 of the water discharge pipe 10 to the water surface 14 can be set to approximately 70 mm, allowing good observation of the sampled water. I was able to do this. Note that the observation tank 11 must be at least partially transparent so that the observation part (water discharge part 15) inside thereof can be visually observed from the outside.
When the tube 1 is cylindrical, a tube made of a transparent material is used, and when the tube is square, at least the top and front surfaces of the tube are preferably made of a transparent material. The observation tank 11 is almost sealed to prevent humidity from rising in the water quality test chamber, but in order to smoothly drain the sampled water that has flowed into the observation tank 11, small air holes 16 are required on the top surface of the observation tank 11. It is a good idea to provide

The sampling equipment for water quality testing of the present invention is used as follows. Sampling water fed through each sampling pipe 5 by continuous operation of each pump 4 is normally transferred to the observation tank via the three-way valve and water discharge pipe 10 by directing each three-way valve 8 toward the observation tank 11 side. 11 respectively. When this sampling water flows into the observation tank 11, the water surface 14 from the water outlet 13 of the water discharge pipe 10 is
A certain distance is ensured for the water discharge section 15 to
Visual observation of the sampled water can be performed at any time using the water discharging section 15 as an observation section. Next, each sampling water that has flowed into the observation tank 11 is collected and discharged to the outside of the water quality test chamber via the drain pipe 12a and the drain pipe 12b.

In addition, when it becomes necessary to sample water to perform a water quality test, etc., by switching the three-way valve 8 corresponding to the necessary sampling water to the water sampling pipe 9 side, the sampling water can be transferred to the three-way valve 8 and the water sampling pipe 9. Water is sprayed onto the sink 7 through the sink 7, and the required amount is sampled for water quality tests. Note that since the sampling water flows continuously and does not accumulate in the pump 4 and the sampling pipe 5, water can be sampled immediately. When the water sampling is finished, the three-way valve 8 is switched to the observation tank 11 side again so that the sampled water can be visually observed at any time.

<Effects> As explained above, according to the sampling equipment for water quality testing of the present invention, sampling water normally flows into an observation tank that can be observed from the outside, so changes in turbidity, etc. can be visually observed at any time. I can do it,
In addition, when it is necessary to sample water for water quality tests, etc., you can easily and immediately sample water by switching the three-way valve corresponding to the required sampling water, and even spray water onto the sink. Since only a small amount of sampled water is sampled and the observation tank has a nearly sealed structure, there is almost no water splashing in the sink, and the humidity in the water quality testing chamber does not increase.

[Brief explanation of drawings]

Figures 1 to 3 are drawings showing examples of embodiments of the present invention, in which Figure 1 is a flow explanatory diagram, Figure 2 is a front explanatory diagram showing the three-way valve and observation tank area, and Figure 3 is an explanatory front view showing the area around the three-way valve and observation tank. FIG. 3 is an explanatory longitudinal cross-sectional view taken along the line AA in FIG. 2; Moreover, FIG. 4 is a flow explanatory diagram showing a conventional sampling equipment for water quality testing. 1... Raw water, 2... Treatment process, 3... Process treated water, 4... Pump, 5... Sampling pipe, 6...
... Valve, 7 ... Sink, 8 ... Three-way valve, 9 ... Water sampling pipe, 10 ... Water discharge pipe, 11 ... Observation tank, 12 ...
Drain pipe, 13...Water outlet, 14...Water surface, 15...
...Water discharge part, 16...Air hole.

Claims (1)

[Scope of utility model registration request] In sampling equipment for water quality tests that samples raw water, water treated in each process, etc. using sampling pipes, three-way valves are installed at the ends of each of the corresponding sampling pipes, and sampling water is sampled at one end of the outflow side of each three-way valve. A common observation is that a nearly sealed and at least partially transparent water pipe is connected to the water sampling pipe for the purpose of discharging sampled water continuously to the other end of the outflow side of each three-way valve. Sampling equipment for water quality testing characterized by a connected tank.