KR102536921B1 - Method of pipe-filling for restarting of Booster Pump System after released the power shut-off - Google Patents

Abstract

The present invention relates to a control method of a pressurized water booster pump system for constantly supplying water at a desired pressure. When it is put in and restarted, water hammer, which causes malfunctions such as damage and leakage of pumps, valves, pipes, pressure tanks, and shortened lifespan, as well as noise and vibration, and malfunctions of pressure sensors and control devices, may occur. In order to solve the problem, when the system is restarted, when a remarkably low discharge pressure is detected, the booster pump has a function of automatically filling the pipe for a set time and number of times until the set pressure is reached according to the set number of rotations and number of pumps. It relates to a pipe filling method for restarting the system.

Description

Method of pipe-filling for restarting of Booster Pump System after released the power shut-off}

The present invention relates to a booster pump system, and more specifically, in a booster pump system of a pressurized water supply method for supplying water at a constant pressure, power cutoff that can prevent water shock by filling a pipe for restarting due to a power interruption in a booster pump system It relates to a pipe filling method for restarting the booster pump system after release.

In general, a booster pump system is composed of a plurality of pumps, confluence pipes, pressure gauges, valves, pressure tanks, and control panels arranged in parallel, and sensing/control is processed/implemented by a control device mounted on the control panel and supplied to the pump. The number control method that regulates (ON/OFF) the power supply and the rotation speed control method that controls the number of revolutions of the pump are provided individually or in combination.

The system is operated according to the automatic operation selection of the booster pump system, and when the power is cut off, the system is stopped, and when the power is supplied again, it can be automatically restarted according to the user's selection.

The booster pump system maintains the previous operation state stored in the internal memory of the control device and restarts it when power is supplied again to prevent water supply interruption.

Since the water in the discharge pipe can be used to some extent even when the power is cut off, if the user carelessly uses water, the power is turned on again and restarted while the pressure in the pipe is significantly low, resulting in multiple pumps rapidly starting. A water shock will occur.

Such water shock causes repeated noise and vibration in various piping parts such as pumps, valves, flanges, piping, and pressure tanks, resulting in leakage due to cracks, shortening of life due to damage, as well as malfunctioning of pressure sensors and control devices. cause

On the other hand, water shock occurs when the booster pump system is started (trial run) for the first time. In order to prevent this, there is a technology that can secure safety by utilizing the pipe filling function only at the first start of the system such as test run in the state of automatic operation to prevent this. It is required.

KR 10-1540777 B1

In order to solve the above problems, an object of the present invention is to provide a booster pump system that prevents water shock by automatically applying a pipe filling function in a restart state by power interruption.

In addition, an object of the present invention is to provide a method for filling a pipe of a booster pump that can be implemented as a control program within a range that does not affect the hardware and control algorithm of the control device in the restart state due to power interruption.

In order to achieve the above object, the present invention includes the steps of reading data on the number of filling times, filling times, filling rotation rates, and the number of filling pumps set at the same time as the start of control; Determining whether to restart after the power cut is released; If the restart is activated, determining whether automatic operation is required; If the automatic operation is activated, determining whether the discharge pressure is less than the set pressure range of the filling pressure; If the discharge pressure is less than the filling pressure, determining whether the number of pumps to be filled is equal to the number of total pumps; If the number of filling pumps is less than the total number of pumps, the pump is additionally operated at the filling turnover rate, and if the number of filling pumps is equal to or greater than the total number of pumps, the operation time counter of the pump is filled with the number of fillings. determining whether it is less than or equal to the total filling time by multiplying time; continuously counting the operation time when the operation time counter of the pump is less than the total filling time; Determining whether there is a pipe filling operation pump when the restart operation is disabled, the operation is not automatic, the discharge pressure exceeds the filling pressure, or the operation time counter exceeds the total filling time; Provided is a pipe filling method for restarting the booster pump system after the power cutoff is released, comprising the step of stopping the pump if there is the pipe filling operation pump.

By providing the present invention configured as described above, the following effects can be expected.

First, there is an effect of removing the cause of damage and life shortening of pumps, valves, flanges, pipes, and pressure tanks.

Second, the cause of noise and vibration can be removed.

Third, it is possible to obtain the effect of improving the quality of water supply and reducing maintenance/management costs through the prevention of malfunction of sensors and control devices.

Figures 1a, 1b, 1c, 1d is a configuration and schematic diagram showing a booster pump system according to the present invention.
Figure 2 is a graph showing the relationship between the discharge pressure and the rotation rate over time through the pipe filling method for restarting the booster pump system after the power cut off release according to the present invention.
Figure 3 is a flow chart showing a pipe filling method for restarting the booster pump system after releasing the power cutoff according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily practice the present invention.

As shown in FIGS. 1A, 1B, 1C, 1D, 2, and 3, the pipe filling method for restarting the booster pump system after the power cutoff is released according to the present invention includes a water tank 240 and a suction valve 230 ), a suction confluence pipe 200, a plurality of pumps 100, a discharge confluence pipe 300, and a discharge valve 340 are sequentially connected through a booster pump system.

As shown in FIGS. 1A, 1B, 1C, and 1D, in the booster pump system, a plurality of pumps 100 are disposed in parallel in a suction conduit 200 and a discharge conduit 300.

Here, the suction confluence pipe 200 is connected to the inlet side of the pump 100 through the first isolation valve 210 .

In addition, the discharge confluence pipe 300 is connected to the outlet side of the pump 100 through the check valve 310 and the second isolation valve 320.

At this time, water may be supplied to the suction side of the suction confluence pipe 200 through the water tank 240 and the suction valve 230 .

Meanwhile, the pressure tank 400 is connected to one end of the discharge confluence pipe 300, and water pressurized by the pump 100 may be supplied to the discharge side through the discharge valve 340 to the opposite side.

In addition, a water level sensor 220 is mounted on the suction confluence pipe 200 to detect whether or not water flows smoothly through the pipe.

In addition, a pressure sensor 330 is mounted in the discharge confluence pipe 300 to sense the discharge pressure in the pipe.

The pump 100 and the booster pump system can be protected according to the signals of the low level sensor 220 and the pressure sensor 330 having the above configuration.

In addition, it may be configured to include a control panel 500 for controlling (ON/OFF) the power supplied to the pump 100 or controlling the number of rotations of the pump 100 in order to keep the set pressure constant.

This booster pump system is divided into a control method for controlling the number of pumps 100 driven by intermittently (ON/OFF) the power supplied to the pump 100 and a rotation speed control method for controlling the number of revolutions of the pump 100. and each control method can be selectively provided or provided in combination according to the user's request.

According to the graph shown in FIG. 2, it can be seen that zones 1 to 4 functioned to fill the pipe, but when the filling pressure is not reached and the operation is restarted, the discharge pressure and rotation rate are displayed over time, and zones 5 to 7 are filled with the pipe. When it is normally restarted through the function, it can be seen that the discharge pressure and rotation rate are displayed according to time.

That is, in the case of Zone 1, when the pressure of the discharge pipe is significantly lower than the filling pressure, the set number of pumps 100 start to operate at the set filling rotation rate of the pump 100 and operate for the set filling time.
Here, the rotation rate refers to the ratio calculated as the average by adding the number of pumps operating for filling and the number of all pumps. It is the ratio calculated when the minimum pump that can be filled is operated, and the filling rotation rate refers to the operating ratio of the pump according to the set filling pressure.

Meanwhile, zone 2 can additionally continuously perform the pipe filling function according to the set number of pipe filling for re-operation after the power cutoff is released.

In zone 3, the pipe filling function may be terminated in a state in which the filling pressure is not reached even though the pipe filling is performed at the last stage of the pipe filling cycle.

And, when the pipe filling is finished in Zone 4, the system is normally restarted according to the control algorithm and can perform automatic operation.

In addition, when the pressure of the discharge pipe in zone 5 is significantly lower than the filling pressure, the set number of pumps 100 start to operate at the set filling rotation rate and operate for the set filling time.

And, since the pressure of the discharge pipe is still less than the filling pressure in zone 6, the pipe filling function may be terminated when the filling pressure is reached within the filling time while additionally continuously performing the pipe filling function according to the number of pipe filling.

On the other hand, when the pipe filling is completed in Zone 7, it is normally restarted according to the control algorithm and can be operated automatically.

That is, when the pipe is normally filled through the pipe filling function, the pressure hunting is less than when the pipe is not filled, and the set pressure can be reached quickly and stably.

In the booster pump system having the above configuration, a method for the pipe filling function will be described with reference to FIG. 3 .

First, when power is applied to the booster pump system, an algorithm set for pipe filling starts (S600).

An input step (S601) of reading data on the number of filling times, filling time, filling turnover rate, and the number of filling pumps 100 set at the same time as the control starts is performed.

Next, when the first determination step (S602) for determining whether to restart after the power cut off is passed, if restart is activated, the second determination step (S603) for determining whether or not automatic operation is passed, and automatic driving is activated. If there is, it may pass through a third judgment step (S604) for determining whether the discharge pressure is less than the filling pressure in the set pressure range.

Then, if the discharge pressure is less than the filling pressure, a fourth judgment step (S605) of determining whether the number of pumps 100 to fill is equal to the number of total pumps 100 is performed.

Therefore, if the number of filling pumps 100 is less than the total number of pumps 100, the pump 100 is additionally operated at a filling rotation rate (S606), and the number of filling pumps 100 If is equal to or greater than the number of the entire pump 100, the operation time counter of the pump 100 is calculated as the product of the number of filling times and the filling time (S608). have

If the operating time counter of the pump 100 is less than the total filling time, after performing the step of continuously counting the operating time (S609), the restart is disabled, not automatic operation, or the discharge pressure exceeds the filling pressure Alternatively, if the operation time counter exceeds the total filling time, a sixth determination step (S610) of determining whether the pipe filling pump 100 is operating is performed.

As a result, when the pipe filling pump 100 is operated, the pump 100 is stopped (S611) and when the pipe filling is completed through the control sequence, it can be performed through an end (S612).

By providing the present invention configured as described above, it is possible to prevent damage to pumps, valves, flanges, piping, and pressure tanks, and to prevent causes of life shortening, and to prevent noise and vibration, and to prevent malfunctions of sensors and control devices. Through prevention, it is possible to obtain the effect of improving the quality of water supply and reducing maintenance/management costs.

The terms and words used in the present specification and claims described above should not be construed as being limited to ordinary or dictionary meanings, and the present inventors appropriately use the concept of terms in order to describe their invention in the best way. It should be interpreted as a meaning and concept consistent with the technical spirit of the present invention based on the principle that it can be defined in the following way.

Therefore, the configurations shown in the drawings and embodiments described in this specification are only one of the most preferred embodiments of the present invention, and do not represent all of the technical ideas of the present invention, so they can be replaced at the time of the present application. It should be understood that there may be many equivalents and variations.

100: pump 200: suction confluence pipe
210: first isolation valve 220: water level sensor
230: intake valve 240: water tank
300: discharge confluence pipe 310: check valve
320: second isolation valve 330: pressure sensor
340: discharge valve 400: pressure tank
500: control panel

Claims (5)

A start step (S600) in which power is applied to the booster pump system;
A first determination step (S602) of determining whether or not to restart after the power cutoff is released when power is supplied through the start step (S600);
a second judgment step (S603) of determining whether or not automatic operation is performed if restart is activated through the first judgment step (S602);
If the automatic operation is activated after passing through the second judgment step (S603), a third judgment step (S604) of determining whether the discharge pressure is less than the filling pressure in the set pressure range;
If the discharge pressure after passing through the third judgment step (S604) is less than the filling pressure, a fourth judgment step (S605) of determining whether the number of pumps 100 to be filled is equal to the number of total pumps 100;
A fifth judgment step (S607) of determining whether or not the total filling time is less than the total filling time after the fourth judgment step (S605);
If the operation time counter of the pump 100 is less than the total filling time, continuously counting the operation time (S609);
When the pipe filling is completed through the above steps sequentially, it is configured to include an end step (S612),
Restart is determined to be inactive through the first judgment step (S602), it is determined that the automatic operation is not in an automatic operation state through the second judgment step (S603), or the discharge pressure exceeds the filling pressure through the third judgment step (S604). a sixth judgment step (S610) of determining whether the pipe filling pump 100 is filling the pipe when it is determined that the total filling time is exceeded or the operation time counter exceeds the total filling time through the fifth judgment step (S607);
Further comprising a step (S611) of stopping the operation of the pump 100 when the pipe filling pump 100 is in an operating state through the sixth judgment step (S610),
Between the start step (S600) and the first judgment step (S602), the start step (S600) and the preset filling number, filling time, filling rotation rate, and the number of filling pumps 100 are provided at the same time. Further comprising step S601,
In the fourth determination step (S605) and the fifth determination step (S607), if the number of pumps 100 to be filled through the fourth determination step (S605) is less than the total number of pumps 100, an additional pump Further comprising a filling pump operation step (S606) of filling the pump 100 at a filling rotation rate of 100,
After the filling pump operation step (S606), if the number of filling pumps 100 is equal to or greater than the total number of pumps 100, the operation time counter of the pump 100 is calculated as the product of the number of filling times and the filling time Step (S608) further comprising a pipe filling method for restarting the booster pump system after power cut off. delete delete delete delete

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