JPH09136095A - Quantitative pump apparatus for combination treatment purification tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the variation in the amount water sent from a discharge tank of the final stage and enable judgement of total amount of water to be treated at a glance by installing a set value shifting mechanism which decreases (increases) the number of revolution of a pump motor when a water level of a tank is high (low) and changes the amount of water to be sent of a pump. SOLUTION: When the water level of a tank equipped with a submergible motor pump is high due to a large amount of water to be treated introduced from a tank of a preceding stage, electric signals are sent from a pressure sensor 6 and a revolution sensor 7 to a control circuit part 3, and a power source which decreases the number of revolution of a pump motor 2 to respond to a pump head at the level reduces the rotation speed of the submergible motor pump. When the water level of the tank equipped with the submergible motor pump is low due to a small amount of water to be treated from the tank of the preceding stage, the power source which increases the number of revolution of the pump motor 2 increases the rotation speed of the submergible motor pump, reducing the variation in the mount of water to be sent associated with the change in the water level. When the quantity of water is required to change, a set value shifting mechanism 8 is operated to change a set water amount.

Description

Detailed Description of the Invention

The present invention relates to a quantitative pump device for a combined treatment septic tank.

As is well known, in order to realize highly efficient purification treatment in a combined treatment septic tank, it is indispensable that sewage is always quantitatively sent to the treatment tank to keep the load of the treatment tank constant. Has been done. In front of the treatment tank, there is a tank called a flow rate adjustment tank for temporarily storing the sewage discharged from households, and water is sent from this tank to the treatment tank via a measuring tank by an underwater pump or the like. Since the water level of the flow rate adjusting tank constantly changes due to fluctuations in the amount of wastewater discharged from the household, and the amount of water sent by the pump also fluctuates significantly due to the fluctuations in the water level, it is not possible to quantitatively send dirty water to the treatment tank.

The same applies to the discharge of treated water from a final stage tank called the discharge tank. The state requires that the amount of treated water be measured for septic tanks of a certain size or larger. And in the past, it was measured with a flow meter, the operating time of the discharge pump was measured with an integration time meter,
It was also calculated by multiplying it by the average water supply of the pump. However, in the former case, the flowmeter itself is expensive, so there is a problem in terms of cost, and in the latter case, the water flow rate of the pump changes depending on the pump head, so the average water flow rate itself is not reliable. This is because the water level in the discharge tank cannot always be constant because the water level in the flow rate adjusting tank constantly changes as described above.

[Object of the Invention] The object of the present invention is to find out the total amount of treated water at a glance, since the amount of treated water discharged from the discharge tank at the final stage in the combined treatment septic tank is little changed due to the fluctuation of the water level. The object of the present invention is to provide a quantitative pump device that can be used.

[Constitution of the Invention] In the quantitative pumping apparatus for a combined treatment septic tank according to the present invention, an underwater pump is submerged in a tank called a discharge tank located at the final stage of the combined treatment septic tank. A pressure sensor that outputs the detected water level in the tank as an electric signal and a rotation speed sensor that detects the actual rotation speed of the pump motor and outputs it as an electric signal are attached to the pump motor, and the electric signals from the pressure sensor and the rotation speed sensor are attached. In response to this, the control circuit for driving the pump motor at an appropriate speed is extended from the pump motor and installed outside the tank.When the water level inside the tank is high, the rotation speed of the pump motor is reduced, and when the water level is low the pump motor And a set amount shift mechanism for increasing or decreasing the water supply amount of the pump while maintaining the relational ratio between the water level in the tank and the pump motor rotation speed. The display means of the tank water level and setting the amount of water additionally provided if necessary, and is to incorporate a pulse generator for outputting a pulse signal corresponding to the set amount of water in the water pump operation.

[Embodiment] An embodiment will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a tank located at the final stage of the combined treatment septic tank, which is an underwater pump installation tank called a discharge tank or the like. Reference numeral 2 denotes a pump motor which receives power from a control circuit unit 3 which will be described later and is driven at a rotation speed corresponding to the water level fluctuation in the submersible pump installation tank 1. Reference numeral 4 denotes the pump motor which is submerged in the submersible pump installation tank 1. In the submersible pump driven by 2, the suction port 4a is opened in the submersible pump installation tank 1, and the discharge port 4b is extended and opened outside the tank. Reference numeral 4'denotes a preliminary pump which is alternately operated with the submersible pump 4 and is operated simultaneously with the submersible pump 4 when the water in the tank is abnormally increased.
5 is a head cover fitted above the pump motor 2,
Reference numeral 6 denotes a pressure sensor attached to the outside of the head cover 5, which takes out the detected water level in the submersible pump installation tank 1 as an electric signal and sends the electric signal to the control circuit unit 3. Reference numeral 3 denotes an external control circuit unit that is installed outside the tank by extending from the pump motor 2, and receives an electric signal from the pressure sensor 6 and, for example, phase control having a circuit configuration as shown in FIG. Thus, when the submersible pump installation tank 1 has a high water level, the rotation speed of the pump motor 2 is reduced, and when the water level is low, the rotation speed of the pump motor 2 is increased and the power is sent to the pump drive unit. Reference numeral 7 denotes a rotation speed sensor mounted on the upper end of the motor shaft in the head cover 5. The pump motor 2 is not always driven at an appropriate rotation speed due to the influence of load or the like. Therefore, the rotation speed sensor 7
The actual number of revolutions of the pump motor 2 detected by is transmitted to the control circuit unit as an electric signal. In FIG. 3, 8 is a set water amount shift mechanism operated by a switch or a dial, 9 is a set water amount display means displayed by a lamp or the like, 10 is a tank water level display means displayed by a lamp or the like, 1
Reference numeral 1 is a water increase warning display means displayed by a lamp or the like, and 12 is a running / stop display means displayed by a lamp or the like. Since the relationship between the water level and the rotation speed for each set water amount is determined as shown in FIG. 4, this relationship is stored in the microcomputer,
By making full use of the set water amount shift mechanism 8, the water supply amount of the pump is increased or decreased while maintaining the relational ratio between the water level in the tank and the rotation speed of the pump motor. Reference numeral 13 denotes a pulse generator that outputs a pulse signal corresponding to a set water amount during operation of the submersible pump. For example, during pump operation at a set water amount of 30 l / min, 30 pulses / min (two pumps from the control circuit unit 3 If a signal of 60 pulses / min is output in the case of simultaneous operation, the integrated flow rate can be known by reading this with a pulse counter, and the total amount of treated water can be found at a glance.

[Operation] When a large amount of inflow of treated water from a pre-stage tank such as a settling tank causes a high water level in the submersible pump installation tank 1, electric signals from the pressure sensor 6 and the rotation speed sensor 7 are supplied to the control circuit section. 3 is sent to the pump drive unit to reduce the rotational speed of the pump motor 2 so as to correspond to the pump head at the water level, the submersible pump 4 is rotated at a low speed, and the inflow of treated water from the preceding tank is When the water level in the submersible pump installation tank 1 becomes low at a low level, a power source for increasing the rotation speed of the pump motor 2 is sent to the pump drive device section, and the submersible pump 4 is rotated at a high speed, so that the submersible pump 4 is supplied with a change in water level. The fluctuation range of the amount of water (the amount of treated water discharged to the outside of the tank) is reduced. The water level fluctuation state in the submersible pump installation tank 1 is displayed by a signal from the pressure sensor 6 so that it can be grasped from outside the tank by the water level display means 10 in the tank such as a lamp.

When it becomes necessary to change the water amount, the set water amount shifting mechanism 8 can be operated to increase or decrease the set water amount while maintaining the above-mentioned relationship between the water level and the rotational speed. For example, the set water amount can be switched by one pump as shown in FIG. 5 by a stepwise switch mechanism. The set water amount increase / decrease state is displayed by the set water amount display means 9 such as a lamp so as to be visible outside the tank.

[Advantages of the Invention] According to the present invention, the change in the amount of water sent due to the fluctuation of the water level in the submersible pump installation tank becomes small, the tank load can be kept constant, and the treated water can be discharged smoothly. Moreover, there is an advantage that the integrated flow rate can be known without using an expensive flow meter, and the total amount of treated water can be found at a glance. It also has the feature that it can immediately respond to the need to change the amount of water. Also,
Since the control circuit is an external type, it is possible to have an embodiment in which the state of the water level in the submersible pump installation tank and the state of change of the set water amount are grasped from outside the tank by a display means such as a lamp.
Moreover, since the situation of the water level in the tank is embodied by using the signal from the pressure sensor, there is a secondary effect that it is not necessary to separately install a dedicated water level gauge as in the conventional case.

[Brief description of the drawings]

FIG. 1 is a side view showing a part of the configuration of the device of the present invention.

FIG. 2 is a block diagram illustrating a circuit configuration of the device of the present invention.

FIG. 3 is a plan view illustrating a panel configuration of a control circuit unit in the device of the present invention.

FIG. 4 is a diagram showing a relationship between a water level and a rotation speed for each set water amount according to the present invention.

FIG. 5 is a diagram showing a relationship between a water supply amount and a head according to the present invention.

[Explanation of symbols]

 1 Submersible Pump Installation Tank 2 Pump Motor 3 Control Circuit Section 6 Pressure Sensor 7 Rotation Speed Sensor 8 Set Water Volume Shift Mechanism 9 Set Water Volume Display Means 10 Tank Water Level Display Means 13 Pulse Generator

Claims (2)

[Claims] Claims: 1. A submersible pump is submerged in a tank called a discharge tank located at the final stage of the combined treatment septic tank, and a pressure sensor for outputting the detected water level in the tank as an electric signal and a pump motor. A rotation speed sensor that detects the actual rotation speed and outputs it as an electric signal is attached to the pump motor, and a control circuit unit for receiving the electric signals from the pressure sensor and the rotation speed sensor to drive the pump motor at an appropriate rotation speed is provided. Installed outside the tank by extending it from the pump motor.When the inside of the tank is at a high water level, the rotation speed of the pump motor is reduced, and when the water level is low, the rotation speed of the pump motor is increased. It is equipped with a set amount shift mechanism for maintaining the relational ratio of the motor speed and increasing / decreasing the water supply amount of the pump, and outputs a pulse signal corresponding to the set water amount during the operation of the submersible pump. Wherein the incorporating pulse generator, combined treatment septic tank for quantitative pumps device. 2. A pressure sensor for submerging a submersible pump at a final stage of a combined treatment septic tank, which is called a discharge tank, and outputting a detected water level in the tank as an electric signal, and a pump motor. A rotation speed sensor that detects the actual rotation speed and outputs it as an electric signal is attached to the pump motor, and a control circuit unit for receiving the electric signals from the pressure sensor and the rotation speed sensor to drive the pump motor at an appropriate rotation speed is provided. Installed outside the tank by extending it from the pump motor.When the inside of the tank is at a high water level, the rotation speed of the pump motor is reduced, and when the water level is low, the rotation speed of the pump motor is increased. A setting amount shift mechanism for increasing and decreasing the water supply amount of the pump while maintaining the relational ratio of the motor rotation speed, and a display unit for displaying the water level in the tank and the set water amount are attached, and
A quantitative pump device for a combined treatment septic tank, which is characterized by incorporating a pulse generator that outputs a pulse signal corresponding to a set water amount while the submersible pump is operating.