JPH0612072Y2 - Automatic water discharge valve - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a water discharge valve which is inserted in the middle of a water pipe to open and discharge water in an emergency.

[Prior art] Until it reaches the end consumption place such as a home from a water purification plant, tap water changes due to the influence of pipelines, other troubles, accidents, etc. May reach undesired levels for drinking water.

For example, when the amount of water used has suddenly decreased for some reason, such as consecutive holidays, and tap water has stopped for a long time in a specific pipeline, the chlorine content that was initially added and adjusted at the water treatment plant was depleted. , There is a concern that it will be completed by breaking down the residual salt content stipulated by the Waterworks Bureau of each city. Also, due to construction or rupture that occurred in the middle of the pipeline, abnormal pollution occurred in the water supply on the downstream side, and opaque water such as so-called "red water" flowed out of the faucet and the cause of it could not be understood. Sometimes.

For this reason, the water supply manager installed a water discharge valve in the main path of the water pipe that connects to the terminal faucet such as at home, and in the event of an accident or abnormality, immediately open the valve and discharge water to the atmosphere,
We have endeavored to avoid sending bad water.

[Problems to be solved by the invention] For example, when checking the residual salt content, in practice, the measurer must circulate through the pipeline, appropriately sample water, and manually analyze the chlorine concentration to determine the quality. I won't. It is a very manual and difficult request today to regularly check all the underground pipe lines that reach like a mesh.

Suddenly, turbid water such as "red water" flows out of the faucet, and it is almost the case that the administrator knows the abnormality for the first time only by reporting from home, unless the water is cut off in advance.

In order to solve the problems described above, the invention of the present application aims to provide an automatic water discharge valve that accurately catches an abnormality that suddenly occurs at some time and immediately guides the pipeline to atmospheric water discharge.

[Means for Solving the Problems] The automatic water discharge valve according to the present invention collects water from the main pipe at all times or at regular intervals, inspects a desired water quality in a water detection tank, converts it into an electric signal, and stores it in advance. The above problem was solved by performing a comparison calculation with the control limit value that had been set, and immediately outputting a signal when the control limit value was exceeded, and opening the discharge channel according to the signal.

[Operation] FIG. 1 is a block diagram of an embodiment of the present invention, showing the relationship between the information transmission path and the operating member. In the figure, the water pipe P is connected to the water discharge passage W, and the electric water discharge valve 1 is opened / closed to discharge or stop the water discharge to the atmosphere. Normally, of course, the valve is closed, and the desired tap water is sent to the detection unit 3 through the water sampling pipe 2 at regular intervals, the desired water quality is inspected in the water detection tank 31 in the unit, and the value of this inspection is controlled. It is converted into an electric number and transmitted to the section 4.

A control limit value specified by the city water department, etc. is input in advance to the control unit, and the actual measured value is input here and both values are compared and calculated, and the measured value should exceed the limit. When the electric signal is output from the control unit 4, the relay terminal in the relay panel 5 is closed, the electric motor 11 is operated to open the water discharge valve 1, and the water in the water pipe P is discharged from the water discharge line W. Discharge to the atmosphere. Eventually, since such an action is automatically manifested, the water quality becomes abnormal due to some cause, and when the control limit value is exceeded, the water in the water pipe is automatically discharged into the atmosphere.

[Embodiment] The detection unit 3 is provided with a valve 3 for supplying water collected in the water detection tank 31.
2 and the discharging valve 33 are mounted respectively, and are connected to the control unit 4 by a circuit so that they are activated at predetermined times.

As the sensor 34 for the water detection tank, either a residual salt meter or a turbidity meter, which is most required to be managed, or both are attached, and the sensor 34 is immersed in water in the water tank to electrically detect the value.

In this example, a polarographic method using microelectrodes was adopted as an example of the residual salt meter. This is because when a voltage is applied between the rotating gold electrode (cathode) and the comparative silver electrode (anode), free effective chlorine is reduced on the gold electrode side and the diffusion current Id flows, so that the chlorine concentration is 0 to 3.0. It can be known over ppm.

Further, the turbidity meter emits light by a light emitting diode in water and scatters the light scattered by fine particles in water, and receives the scattered light by a fort transistor and captures it as an electric signal corresponding to 0 to 10 ppm of turbidity.

These are amplified by an amplifier 35 such as a diode in the detector and sent to the controller 4. The input value is A / D converted so that it can be processed by a microcomputer, and compared with the control limit value of water quality that has been A / D converted and input in advance. The control value to be controlled is slightly different depending on the regulations of each city, but for example, the residual salt concentration is 0.1 p
It seems that pm or less is not allowed, and turbidity of 2 ppm or more is not allowed, and it is set in consideration of citizens' health and total demand. As for the mechanical structures of the relay board 5 and the water discharge valve itself, those having publicly known contents may be applied.

[Effects of the Invention] Since the automatic water discharge valve according to the present invention has the above-described structure and operation, it is automatically placed in a proper position in the water pipe to automatically discharge water in response to an unexpected abnormality, resulting in a failure. Eliminate the concern that a health-related accident will occur after you have sent tap water of quality to your home. Moreover, since it is not necessary to regularly visit the inspectors, which greatly contributes to the labor saving, it must be said that it was truly timely today as the lack of manpower was exclaimed.

In addition, the control unit is equipped with a function that automatically reports information to the central management office, and records the operation results to let you know the fluctuations and history and suggest an appropriate accident treatment policy. The above merit is great.

[Brief description of drawings]

 FIG. 1 is a block diagram of an embodiment of the present invention. 1 ... Water discharge valve, 2 ... Water sampling pipe, 3 ... Detection unit 4 ... Control unit, 31 ... Water detection tank 34 ... Sensor

Claims (1)

[Scope of utility model registration request] 1. A water discharge valve installed in the middle of a water pipe,
The desired water quality is inspected at all times or at regular intervals in a water sampling tank that collects water from the main pipe, and it is compared and calculated with a control limit value stored in advance.When it exceeds this, a signal is immediately output, An automatic water discharge valve which opens a water channel according to the signal.