JP2521167Y2 - Water quality measuring device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water quality measuring device for measuring a water quality at a constant depth near the water surface in a water quality measuring facility installed in a lake or the like.

[0002]

2. Description of the Related Art In recent years, lakes and
Opportunities to measure water quality in rivers and oceans are increasing,
In order to measure the water quality at a measurement point that is some distance from the shore, there is an example where a water quality measurement facility is installed offshore. Conventionally, when measuring the water quality of the surface layer at these water quality measuring facilities, an observer lowers the container from the deck of the facility to pump up sample water or suspends a water quality sensor to collect water. It was a measurement.

Further, as a method for continuously measuring the water quality, a method of fixing the water sampling pipe or a water quality sensor for pumping the sample water by a pump to the outer wall of the facility to perform the water sampling or the measurement, or , A water quality sensor is connected to the tip of the communication cable derived from the facility, the water quality sensor is fixed to a float floating on the water surface to measure the water quality, and the water sampling pipe hanging from the facility toward the water surface is used as described above. There is a method of fixing to the same float and absorbing water using a pump and introducing this into a measuring device provided in the facility for measurement.

[0004]

[Problems to be Solved by the Invention] However, the method in which the observer comes out on the deck of the measurement facility to collect water and makes a measurement as described above is complicated, and it is extremely susceptible to strong winds and waves during bad weather. It is a tough job and dangerous. Also, in the method of fixing the water sampling pipe and the water quality sensor to the outer wall of the facility, the water surface changes due to waves, so the measured water depth is not constant, and it is difficult to obtain the measurement result at a predetermined water depth. Even with the method of fixing the water quality sensor or the water sampling pipe to the floating float, the float may tilt due to waves, swing around, or move up and down, so it is not possible to stably measure the water quality at a specified depth. Have difficulty.

In view of the above-mentioned problems, the present invention continuously collects sample water at a substantially constant water depth even if the water surface fluctuates, or holds the water quality sensor at a predetermined position for measurement. An object of the present invention is to provide a water quality measuring device that can perform

[0006]

In order to achieve the above object, a water quality measuring device according to the present invention accommodates a float inside a guide cylinder having a large number of holes, and the float has one end of a first cord. The lower end of the first weight is connected to the other end of the first cord, the upper end of the first weight is connected to one end of the second cord, and the second cord suspended through the pulley is A second weight is connected to the other end, and the weights of the first weight and the second weight are adjusted so that the float floats near the water surface.

The float floats above the surface of the water and moves along with the fluctuation of the surface of the water. A water quality sensor is provided below the float, and a communication cable connected to the sensor is preferably provided along the cable. In addition, a water sampling pipe having a water intake port provided below the float is provided along the line, and the float floats near the water surface to collect water at a predetermined water depth.

[0008]

[Operation] The present invention has the above-mentioned structure, and the float is protected in the guide tube and is guided in the vertical direction. Moreover, the guide tube has a large number of holes around it. Since it is open, the water inside and outside this guide tube will be replaced and the water quality will be the same, and if waves are occurring, the water flowing into the inside will be attenuated when passing through the hole. Since it is quite quiet, fluctuations in the internal water level with respect to fluctuations in the external water level can be suppressed to a considerably low level.

Further, the float is suspended by a rope, and the tension is adjusted in the rope so that the float floats on the water surface, so that the position of the water quality sensor and the water intake port is maintained at a substantially predetermined water depth. be able to.

[0010]

EXAMPLES Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing a main part of a water quality measuring device 1 of the present invention, in which a first weight 2a and a second weight 2b are connected by a second cord 3b, and a first pulley 4a and a second pulley 4b are interposed. Hanging down. Further, one end of the first cord 3a is connected to the lower end of the first weight 2a, and the other end is connected to the upper end of the float 5. The water quality sensor 6 is connected to the lower end of the float 5 by a strap 7, and the water quality sensor 6 is housed and protected in a guide cylinder 8 having a large number of holes 8a. The second weight 2b is hung while being protected so as to move up and down inside the guide tube 9.
Further, the communication cable 10 for transmitting the measurement data of the water quality sensor 6 is provided along the first cord 3a by the fixture 11.

Such a water quality measuring device 1 is moored offshore in a lake or the like by a tension leg system, or is installed outside the water quality measuring facility 12 as shown in FIG. , The first pulley 4a and the second pulley
The pulley 4b is a column protruding outside the water quality measurement facility 12.
It is fixed to the lower surface of 12a. The guide tube 8 is fixed to the outer wall of the water quality measuring facility 12 by a supporting arm 12b, and the guide tube 9 is fixed to the handrail 12d of the deck 12c.

By accommodating the water quality sensor 6 in the guide tube 8, the water quality sensor 6 is held at a predetermined position with respect to the water quality measuring facility 12 so that the water quality sensor 6 can be accurately guided in accordance with the fluctuation of the water surface WL, and the water flow is swept away. It prevents the water quality measurement facility 12 from colliding with the floating substance and the floating substance from being damaged. In addition, a large number of holes 8a are opened in the guide cylinder 8 so that water inside and outside the guide cylinder 8 can freely flow in and out so that the water quality inside and outside the guide cylinder 8 is the same. When a wave passes through the hole 8a and enters the guide tube 8, it also has the effect of attenuating the wave, so that the fluctuation of the water surface WL outside the guide tube 8 is softened. The diameter of this hole 8a is 3 when the diameter of the guide tube 8 is about 40 cm, for example.
At ~ 5 cm, the perforation density seems to be 10-20%.

Next, a method of giving tension to the first string 3a and the second string 3b to float the float 5 near the water surface WL will be described. The first weight 2a is lighter than the second weight 2b, and the weight hanging from the first pulley 4a is set to be heavier than the weight hanging from the second pulley 4b.
It has been adjusted so that it can surface nearby. Therefore, when the float 5 and the water quality sensor 6 are above the water level WL, the second rope 3b moves in the direction from the first pulley 4a to the second pulley 4b, and the water quality sensor 6 and the float 5 move to the water level WL. When landing on the second pulley 3b, the weight of the float 5 itself is reduced by the buoyancy of the float 5 itself. Move in the direction of pulley 4a. This state is repeated while decaying,
The weight hanging on the first pulley 4a and the second pulley 4b gradually approaches the equilibrium point, and at the equilibrium point, the movement of the second cord 3b stops and the float 5 is maintained in a state of floating at a constant water depth near the water surface WL. To be done.

Next, FIG. 3 shows a case where a water sampling pipe 13 for sampling the sample water is installed in place of the water quality sensor 6 and the communication cable 10. One end of this water sampling pipe 13 is provided with a water intake port 13a at a constant water depth below the water surface WL, and the other end is connected to a pump (not shown) provided in the water quality measurement facility 12, which sucks sample water. There is. In addition, this sampling pipe 13
Is provided along the first cord 3a by a fixture 11 to prevent the water sampling pipe 13 from loosening. Also in this case, since the float 5 floats in a state of being maintained at a predetermined water depth near the water surface WL, it is possible to stably sample water of a predetermined water depth.

Although two pulleys are used in each of the embodiments of the present invention, any number may be used as long as the weights hanging on both sides of the pulley do not interfere with each other. Further, it is preferable that weights of different weights are prepared so that the weights can be exchanged with the water quality measuring devices 1 having different weights, and the weights can be exchanged appropriately. Further, although the shape of the hole 8a opened in the guide tube 8 is circular in the present embodiment, there is no problem even if it has an oval shape or the like, and the size and the hole density of the hole 8a depend on the wave height of the installation place, the running water velocity, etc. It may be changed as appropriate in consideration. In addition, a plurality of guide tubes 8 having different diameters
In the case of concentric installation, the wave attenuation effect is further improved.

[0016]

The water quality measuring device according to the present invention accommodates the float in the inside of the guide tube having a large number of holes, and connects one end of the first cord to the float. The lower end of the first weight is connected to the end, the upper end of the first weight is connected to one end of the second cord, and the second weight is connected to the other end of the second cord suspended via a pulley. Since the weights of the first weight and the second weight are adjusted so that the float floats near the water surface, the following effects can be obtained.

The water quality measuring device provided on the float is housed and protected in the guide cylinder. Moreover, since the guide cylinder has a large number of holes in the periphery, water inside and outside the guide cylinder is When the water quality changes due to replacement, the water flowing into the interior is damped when passing through the holes and becomes quite quiet when waves are generated. The fluctuation of the water level can be suppressed to a considerably small level.

Further, since the float is suspended by a cord, and the tension is adjusted by the weight connected to the cord so that the float floats on the water surface, the position of the water quality sensor and the water intake port is almost predetermined. It can be maintained at the water depth of, and the sample water can be stably measured and sampled.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a first embodiment of the present invention.

FIG. 2 is a schematic view of a water quality measuring device of the present invention installed in a water quality measuring facility.

FIG. 3 is a partially cutaway side view of a second embodiment of the present invention.

[Explanation of symbols]

1 Water quality measuring device 2a 1st weight 2b 2nd weight 3a
1st line 3b 2nd line 4a 1st pulley 4b
Second pulley 5 Float 8 Guide tube 8a hole WL
Water surface

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-5415-1092 (JP, A) Actually open 2-25860 (JP, U) Actually open 51-133322 (JP, U)

Claims (1)

(57) [Scope of utility model registration request] 1. A float is housed inside a guide cylinder having a large number of holes, and one end of a first cord is connected to the float.
The lower end of the first weight is connected to the other end of the line, the one end of the second line is connected to the upper end of the first weight, and the second weight is connected to the other end of the second line suspended via the pulley. A water quality measuring device, wherein the weights of the first weight and the second weight are connected so that the float floats near the water surface.