JPH0781977B2 - Automatic residual chlorine measuring device in existing pipeline - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic residual chlorine measuring device for tap water flowing in an existing water pipe.

Conventional technology Conventionally, water distribution pipes in urban areas form a mesh-like pipeline, so if the usage of water deviates to one part of the area, stagnant water will occur in the other part of the area, and the residual chlorine concentration will increase. There is a problem of decline. However, automatic measuring equipment such as residual chlorine is rarely installed in the middle of the water distribution pipe, and usually the test water collected at the survey point is brought back and measured by the automatic measuring equipment, or manually measured on site. is doing.

However, since the test water is collected at a plurality of points, if the test water is taken back and measured as in the conventional case,
It took a lot of time to bring back a large amount of test water, and it was inconvenient to obtain the measurement results on the spot. Also, if you manually measure on-site, it will take time,
There was a problem that the measurement result had an error due to individual differences among workers.

The present invention solves the above-mentioned problems, and an object of the present invention is to provide an automatic residual chlorine measuring device in an existing pipeline capable of automatically measuring residual chlorine in an existing water pipeline on site.

Means for Solving the Problems In order to solve the above problems, the present invention provides an insertion jig that is detachably attached to an on-off valve provided in the middle of an existing pipeline and is slidable on the insertion jig. In addition, it is kept watertight and one end is inserted into the existing pipeline through the on-off valve, and the test water inflow passage and the test water outflow passage are formed inside, and the test water inflow passage and the test water flow of this insertion portion. It has a residual chlorine sensor part that is connected to the outlet and detects the value of residual chlorine in the test water.The residual chlorine sensor part drives the screw and the screw to generate a flow in the flow path. The motor and the chlorine measuring sensor are provided.

Operation With the above configuration, the insertion jig can be attached using the auxiliary valves such as fire hydrants and air vent valves that have already been installed in the existing pipeline, so it can be installed in the existing pipeline without the need for construction work. Can be installed.

Then, the water flowing in the existing pipeline flows into the residual chlorine sensor section through the test water inflow channel of the insertion section, and residual chlorine is measured in the residual chlorine sensor section. In other words, the screw pushes out the water guided to the residual chlorine measurement sensor,
A chlorine measuring sensor detects residual chlorine contained in water and produces a voltage output according to the value of the residual chlorine. In addition, the water whose residual chlorine is measured is returned from the residual sensor section to the existing pipeline through the test water outflow channel of the insertion section. Therefore, the water guided to the residual chlorine sensor unit can be returned to the original existing pipeline without contacting the atmosphere, so that the risk of water contamination can be avoided, and since there is no drainage, the device, Equipment can be downsized.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. First
In the figure, an insertion jig 3 is attached to an opening / closing valve 2 provided in the existing pipeline 1. This on-off valve 2 uses a sub valve such as a fire hydrant or an air vent valve provided in the middle of the existing pipeline 1. An insertion portion 4 is slidably and watertightly provided on the insertion jig 3, and one end side of the insertion portion 4 passes through the flow path of the opening / closing valve 2 in a state where the opening / closing valve 2 is fully opened. It is inserted inside the existing pipeline 1. And
An inflow conduit 5 that forms a test water inflow path inside the insertion part 4
And an outflow conduit 6 forming a test water outflow passage are formed, and an inflow hole 7 communicates with the inflow conduit 5 and opens at the lower end of the insertion portion 4, and an outflow hole 8 communicates with the outflow conduit 6. It is open. Further, the inflow hole 7 and the outflow hole 8 are opened so as to be orthogonal to the flow direction of the water 9 flowing inside the existing pipeline 1. This is to prevent the generation of a differential pressure between the inflow hole 7 and the outflow hole 8 against the change of the flow direction inside the existing pipeline 1 with time. Furthermore, the flow velocity sensor 10 projects from the lower end of the insertion portion 4, and the signal line 11 connected to the flow velocity sensor 10 reaches the upper end of the insertion portion 4. Further, the inside of the insertion portion 4 is watertightly sealed around the inflow conduit 5, the outflow conduit 6 and the signal line 11. A residual chlorine measuring sensor unit 12 is provided in communication with the inflow conduit 5 and the outflow conduit 6, and a chlorine measuring sensor 13 is arranged in the middle of the flow path of the residual chlorine measuring sensor unit 12. A screw 14 for generating a flow therein and a DC motor 15 for driving the screw 14 are provided. Further, the chlorine measuring sensor 13 includes an interface circuit 16 and a signal line 17.
Is connected to the data logger unit 18 via. Further, the signal line 11 of the flow velocity sensor 10 is connected to the data logger unit 18, and the flow velocity value detected by the flow velocity sensor 10 can be transmitted to the data logger unit 18 as a signal, and the CPU of the data logger unit 18 can also be used by the DC motor 15 It is possible to control the start-stop of the.

The operation of the above configuration will be described below.

Since the insertion jig 3 is attached using the auxiliary valve such as the fire hydrant and the air vent valve already provided in the existing pipeline 1, the insertion jig 3 can be attached to the existing pipeline 1 without requiring construction such as civil engineering work.

Then, the water 9 flowing through the existing pipeline 1 is guided from the inflow hole 7 through the inflow conduit 5 to the flow path of the residual chlorine measuring sensor unit 12.

Then, the water 9 guided to the residual chlorine measuring sensor unit 12 is pushed out toward the outflow conduit 6 by the screw 14. At this time, the chlorine measuring sensor 13 detects the residual chlorine contained in the water 9, and a voltage output corresponding to the value of the residual chlorine is generated. Then, the obtained voltage output is converted into a signal by the interface unit 16, and the converted signal is transmitted to the data logger unit 18 via the signal line 17. Further, the flow velocity value of the water 9 detected by the flow velocity sensor 10 is transmitted as a signal to the data logger unit 18 via the signal line 11. Then, the water 9 in which residual chlorine is detected passes through the outflow conduit 6 and is returned from the outflow hole 8 to the existing pipeline 1.

Therefore, the water guided to the residual chlorine sensor unit 12 is returned to the original existing pipeline 1 without coming into contact with the atmosphere, so that water contamination is prevented, and since there is no drainage, the arrangement and the equipment can be downsized.

Further, the control of the CPU of the data logger unit 18 can automatically start and stop the DC motor 15 and record the measured data. In addition, the flow velocity sensor
By incorporating 10 and the inflow conduit 5 and the outflow conduit 6 inside the introduction part 4, the insertion work can be simplified.

EFFECTS OF THE INVENTION As described above, according to the present invention, the insertion jig is attached by using the auxiliary valve such as the fire hydrant or the air vent valve that is already provided in the existing pipeline, so that construction such as civil engineering work is not required. It can be installed in the existing pipeline without. Since the water introduced to the residual chlorine sensor can be returned to the original existing pipeline without contacting the atmosphere, the risk of water contamination can be avoided, and since there is no drainage, the device, Equipment can be downsized. By measuring the residual chlorine with the residual chlorine sensor unit, the individual subjectivity of the worker does not influence the measured value, and the residual chlorine can always be measured accurately.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention. 1 ... Existing pipeline, 2 ... Open / close valve, 3 ... Insertion jig, 4 ...
… Insertion part, 5 …… Inflow conduit, 6 …… Outflow conduit, 9 ……
Water, 10 ... Flow velocity sensor, 12 ... Residual chlorine measurement sensor section, 18 ... Data logger section.

Claims (1)

[Claims] 1. An insertion jig removably attached to an on-off valve provided in the middle of an existing pipe line, and an existing pipe slidably and watertightly retained by the insertion jig and having one end passing through the on-off valve. The value of the residual chlorine in the test water, which is provided in communication with the insertion part that is inserted in the channel and has the test water inflow channel and the test water outflow channel formed inside, and the test water inflow channel and the test water outflow channel of this insertion channel. And a residual chlorine sensor unit for detecting the residual chlorine sensor unit, a screw for generating a flow in the flow path, a motor for driving the screw, and a chlorine measuring sensor are provided. Automatic residual chlorine measuring device in existing pipeline.