JPH11248507A - Simple flow rate integrating meter and flow rate integrating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flow rate integrating meter which can extremely simply integrated and measure an accurate undiluted solution per unit time and is further suitably provided in water processing facilities disposed in many positions since it is lower priced than a conventional flow meter, and its flow rate integrating method. SOLUTION: In a flow rate integrating meter 1 provided in an undiluted solution supply duct 6 on a discharge side of an undiluted solution supply pump for supplying an undiluted solution at a fixed amount, this simple flow rate integrating meter comprises an air bent 2 provided so as to bypass in a vertical downward duct part of the undiluted solution supply duct 6 and vertically provided containing a bent closing valve 4; a transparent measuring cylinder 3 vertically provided on a downward side of a bypass part; and a closing valve 5 provided on a downstream side of the measuring cylinder 3, and its integrating method is indicated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow rate integrator and a flow rate integrating method for measuring the flow rate of a stock solution per unit time of a stock solution discharged and fed by a pump, and more particularly to the supply of a small stock solution having a relatively high viscosity. The present invention also relates to a flow integrator and a flow integration method for feeding liquid.

[0002]

2. Description of the Related Art Conventionally, various pumps are used for supplying and sending liquid in water treatment facilities such as sewage treatment plants, human waste treatment plants and various wastewater treatment plants, chemical plants and other industries. However, a diaphragm pump or the like is used for supplying and sending a small amount of a stock solution having a relatively high viscosity such as a polymer flocculant, a chemical solution such as lime milk, or sludge.

As a flow meter for measuring the flow rate of a stock solution discharged and fed by the pump or the like, a rotor that floats a float with a liquid flowing upward from below and measures the flow rate based on the floating position. An area flow meter such as an orifice plate, a throttle section is provided in a liquid flow path, and a differential pressure type flow meter such as an orifice plate or a Venturi pipe for measuring a flow rate from a differential pressure between an upstream side and a downstream side of the throttle section, and other electromagnetic type Although an electric flow meter such as an ultrasonic type is used, a rotor meter is often used for supplying and sending a small amount of a stock solution having a relatively high viscosity.

[0004]

In a variety of pumps, when a relatively small amount of undiluted solution is supplied with a relatively high viscosity, the flow rate of the pump is difficult to control, and pulsation occurs, so that the instantaneous flow rate fluctuates. In particular, as in the case of a polymer flocculant, the effect increases as the viscosity increases and as the flow rate decreases.

In the various flow meters described above, the instantaneous flow rate fluctuates due to the influence of the flow rate control and pulsation of the pump, so that it is difficult to accurately measure the flow rate. In the area flow meter, there are influences such as the viscosity coefficient, temperature, and density of the stock solution, and it is necessary to correct the flow rate based on those values to obtain the flow rate, which is troublesome. Also, in a differential pressure type flow meter such as an orifice plate or a venturi tube, the pressure loss is constantly increased, and it is easy to be clogged by solids.In addition, in an electric type flow meter such as an electromagnetic type or an ultrasonic type, equipment is used. There is a problem that becomes expensive.

Accordingly, the present invention has been made in view of the problem of a stock solution flow meter used in the supply of small amounts of stock solution having relatively high viscosity in water treatment facilities, chemical plants, or other industries. A flow integrator that can be integrated very easily and accurately and accurately measures the flow rate of undiluted solution per unit time, and is inexpensive compared to conventional flowmeters. The purpose of the present invention is to provide a flow rate integrating method.

[0007]

The gist of the present invention for achieving the above object is to provide a raw material supply pipe on a discharge side of a raw material supply pump for supplying a constant amount of a raw solution in the invention described in claim 1. In the flow integrator described above, an air vent provided by a bypass in a vertical descending pipe section of the stock solution supply pipe and provided with a vent opening / closing valve, and provided vertically on a downstream side of the bypass section. This is a simple flow rate integrator comprising a transparent measuring cylinder and an on-off valve provided downstream of the measuring cylinder.

Further, in the invention described in claim 2, a vent opening / closing valve of an air vent provided in a vertical descending pipe portion of a stock solution supply pipe on a discharge side of a material supply pump for supplying a stock solution in a fixed amount. And opening and closing the on-off valve provided further downstream of the transparent measuring cylinder provided vertically on the downstream side of the bypass section, and the undiluted solution per unit time stored in the transparent measuring cylinder. This is a flow rate integration method characterized by measuring a flow rate.

The measuring cylinder is entirely transparent glass,
It may be formed into a cylindrical shape using plastic or the like, or a part of the metal tube in the axial direction may be cut out to obtain the transparent glass, plastic, or the like, and further, the whole may be formed of transparent glass, plastic, or the like. It is also preferable to form it and cover it with a metal tube whose periphery is partially cut off in the axial direction.

Further, it is preferable that the measuring cylinder is provided with markings or printings at regular intervals in the axial direction so that the accumulated amount of the undiluted solution can be measured by visual inspection. Alternatively, a configuration may be employed in which a liquid level measuring device such as the above is attached to automatically measure the accumulated amount of the undiluted solution.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a simple flow integrator according to one embodiment of the present invention, and FIG. 2 is a system diagram of one embodiment in which the simple flow integrator of the present invention is arranged.

In FIG. 1, reference numeral 1 denotes a simple flow rate integrator which has flanges 8 and 9 between vertical descending pipe sections 6a and 6b of a stock solution supply pipe 6 on the discharge side of a stock solution supply pump for supplying a stock solution. And the entire portion sandwiched between the flanges 8 and 9, the T-joint 10 and the elbow 1
1, an air vent 2 erected with a vent opening / closing valve 4 and having a U-shaped tip at the end thereof, and a transparent measuring cylinder 3 provided vertically on the downstream side of the bypass part.
And an on-off valve 5 provided downstream of the measuring cylinder.

Although the air vent 2 is bypassed through the T-joint 10 and the elbow 11, the air vent 2 may have a structure in which pipes are connected by welding. It is preferable that the height be the above-mentioned height, and it is preferable to provide the check valve 7 above the vent valve 4 so that the air does not flow backward, but the present invention is not limited to these.

The measuring cylinder 3 may be formed entirely in a cylindrical shape using transparent glass, plastic, or the like. Alternatively, the transparent glass may be formed by cutting out a part of the metal tube in the axial direction. It is also preferable to use a plastic or the like, and further form the whole by using transparent glass or plastic, and cover the periphery with a metal tube whose axial direction is partially cut away.

Further, it is preferable that the measuring cylinder 3 is provided with markings or printing at regular intervals in the axial direction so that the accumulated amount of the undiluted solution can be measured by visual measurement. A configuration may be employed in which a liquid level measuring device such as a sound wave is attached to automatically measure the stored amount of the undiluted solution.

The operation of supplying the undiluted solution by arranging the simple flow rate integrator having the above configuration in the undiluted solution supply system will be described below with reference to FIG.

Normally, the undiluted solution stored in the undiluted solution tank 12 is withdrawn by the undiluted solution supply pump 13 and discharged to the undiluted solution supply line 6, and the transparent liquid from the vertical descending lines 6a and 6b and the simple flow integrator 1 is removed. The liquid is sent to the tank 14 and other places for transferring the undiluted solution via the measuring cylinder section.

In order to measure the flow rate of the stock solution per unit time, the vent valve 4 of the air vent 2 is opened to release the air in the measuring cylinder, and the valve 5 provided further downstream of the measuring cylinder is opened. The liquid is retained in the measuring cylinder 3 by closing the valve. At this time, the liquid level is visually checked through a transparent part, and the storage time of the raw liquid is measured with a stopwatch or the like, so that the unit time is measured. Measure the undiluted solution flow rate.

By the above operation, when the stock solution is supplied by the stock solution supply pump 14, even if there is a slight pulsation and the instantaneous flow rate changes, the stock solution integrated flow rate per unit time can be accurately measured.

After measuring the flow rate of the stock solution, the vent opening / closing valve 4 of the air vent 2 is closed and the opening / closing valve 5 provided further downstream of the measuring cylinder is opened to shift to a steady stock solution supply operation. can do.

[0021]

According to the present invention, the flow rate of a stock solution per unit time can be measured very easily and accurately, and it is inexpensive as compared with a conventional flow meter. A flow rate integrator that can be used and a flow rate integrating method thereof.

[Brief description of the drawings]

FIG. 1 is a front view of a simplified flow integrator according to an embodiment of the present invention.

FIG. 2 is a system diagram of an embodiment in which a simple flow integrator according to the present invention is arranged.

[Explanation of symbols]

 1: Simple flow meter 2: Air vent 3: Measuring cylinder 4: Vent on / off valve 5: On / off valve 6: Stock solution supply line 7: Check valve

Claims (2)

[Claims] 1. A flow rate integrator provided in a stock solution supply pipe on a discharge side of a material supply pump for supplying a stock solution in a fixed amount, wherein the flow rate meter is provided to bypass a vertical descending pipe portion of the stock solution supply pipe, and to open and close a vent. A simple flow rate integration comprising an air vent provided with a valve, a transparent measuring cylinder provided vertically on the downstream side of the bypass portion, and an on-off valve provided on the downstream side of the measuring cylinder. Total. 2. A vent opening / closing valve of an air vent provided in a vertical descending pipe section of a stock solution supply pipe on a discharge side of a material supply pump for supplying a stock solution at a constant rate.
Closing the on-off valve provided further downstream of the transparent measuring cylinder provided vertically on the downstream side of the bypass section, and measuring the flow rate of the stock solution per unit time stored in the transparent measuring cylinder. Characteristic flow integration method.