KR20140049107A - System for controlling of sea water pump in vessel and method thereof - Google Patents

Abstract

Disclosed are a system for controlling a sea water pump in a ship and a method for controlling a sea water pump in a ship capable of optimizing operation efficiency of a pump by allowing each pump to have the same operation time by adding an automatic shift driving function depending on sea water pump operation time. The disclosed system for controlling a sea water pump in a ship comprises: a sea water pump unit for introducing sea water into a ship; a sea water temperature sensor detecting the temperature of the sea water; an operation time measuring unit measuring the operation time of the sea water pumps in the sea water pump unit; a controller which controls the number of rotation of the sea water pumps according to the temperature of the sea water detected in the sea water temperature sensor and which operates the sea water pumps in turn according to the operation time of the sea water pumps measured in the operation time measuring unit for equalizing the operation time; and an inverter controlling the number of rotation of sea water pumps in the sea water pump unit according to the control of the controller. [Reference numerals] (10) Sea water pump unit; (120) Operation time measuring unit; (130) Controller; (140) Inverter; (150) Sea water temperature sensor; (AA) Sea water pump 1; (BB) Sea water pump 2; (CC) Sea water pump 3

Description

System for controlling of sea water pump in vessel and method

The present invention relates to a seawater pump control of a ship, and more particularly, by adding an automatic shift operation function according to the operating time of the seawater pump so that each pump has an equal operating time of the ship to optimize the operating efficiency of the pump A seawater pump control system and method thereof are provided.

In general, the vessel circulates fresh water around the engine to cool the engine.In order to prevent the fresh water from overheating, the vessel uses a pump to introduce seawater from the outside of the vessel into the vessel, and then cools the fresh water using the introduced seawater. Use the method to make it. Here, a seawater pump is used to introduce seawater into a vessel.

These seawater pumps are designed to have the same rotational speed all the time, but in recent years, the amount of seawater required by the ship varies depending on the seawater temperature during the voyage of the ship, so that the rotational speed of the seawater pump is changed according to the seawater temperature. Energy saving methods are being used.

The conventional method of saving energy by changing the rotational speed of the seawater pump according to the seawater temperature is disclosed in Republic of Korea Patent Application Publication No. 10-2005-0061426 (June 22, 2005) (Invention name: for engine cooling of ships) Pump control system) (hereinafter referred to as "prior art").

The prior art disclosed is a seawater temperature sensor that detects the temperature of the seawater that is the primary cooling fluid flowing from the outside of the vessel and outputs a signal, and detects the temperature of the fresh water, which is the secondary cooling fluid that cools the engine of the vessel, and outputs a signal. Fresh water temperature sensor, inverter that outputs alternating voltage and frequency according to control signal, inverter pump that rotates by alternating current transmitted from inverter and lowers the temperature of fresh water by introducing sea water into the vessel It is provided with a sequence pump for turning on / off the seawater, receiving a temperature signal from the seawater temperature sensor and the fresh water temperature sensor, and controlling the operation of the inverter pump and the sequence pump by transmitting a control signal to the inverter and the sequence pump. In addition, energy is saved by changing the rotation speed of the seawater pump according to the seawater temperature.

1. Korean Patent Application Publication No. 10-2005-0061426 (published on June 22, 2005) (name of the invention: the control system of the engine cooling pump for ships)

However, the prior art as described above has the advantage of saving energy by changing the rotational speed of the seawater pump according to the seawater temperature, but the seawater pump alternately only when there is an error in the pressure, temperature, input and output pressure of the seawater pump Because of driving, the driving time is concentrated only on the seawater pump that is frequently operated during long-distance sailing to increase the fatigue of a particular seawater pump.

In particular, when there is no problem with the seawater pump, only the currently operated seawater pump is operated. Therefore, the operation efficiency of the entire seawater pump is low due to the operation of only a specific seawater pump, and only the specific seawater pump operated increases the fatigue degree, so that it can be replaced later. Since it is necessary, there is a disadvantage that the maintenance and repair cost of the pump is high.

Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art,

The problem to be solved by the present invention is to add an automatic shift operation function according to the operating time of the sea water pump so that each pump has an equal operation time, so that the water pump control system and method of the ship to optimize the operating efficiency of the pump To provide.

Another problem to be solved by the present invention is to add an automatic shift operation function according to the operating time of the sea water pump to ensure that each pump has an equal operating time to optimize the operating efficiency of the pump to reduce the maintenance cost of the pump A seawater pump control system of a ship and a method thereof are disclosed.

The seawater pump control system of the ship for solving the above problems,

A sea water pump unit for introducing sea water into the ship;

A seawater temperature sensor detecting a temperature of the seawater;

An operation time measuring unit measuring an operation time of the sea water pumps in the sea water pump unit;

The rotation speed of the seawater pumps is controlled according to the seawater temperature detected by the seawater temperature sensor, and the seawater pumps are alternately driven according to the operating time of the seawater pumps measured by the operation time measuring unit to equalize the operating time of the seawater pump. A controller for controlling it;

And an inverter for controlling the number of rotations of the seawater pumps in the seawater pump unit under the control of the controller.

The sea water pump portion is characterized in that consisting of sea water pumps for introducing sea water into the vessel.

In this case,

The operation time of the seawater pump measured by the operation time measuring unit is stored for each seawater pump, and the seawater pump is alternately driven according to the total operation time of the seawater pumps accumulated when the seawater pump is driven to control the operation time of the seawater pump evenly. Characterized in that.

The seawater pump control method of the ship to solve the above problems,

(a) checking a driving mode of the seawater pump and selecting a seawater pump to be driven in the automatic control mode;

(b) controlling and driving the rotation speed of the selected seawater pump, and measuring and storing an operating time of the driven seawater pump;

(c) comparing the measured operating time (driving time) of the seawater pump with a preset seawater pump driving time;

(d) maintaining the operation of the currently operated seawater pump when the measured operating time of the seawater pump is less than the set seawater pump driving time;

(e) if the measured operating time of the seawater pump is greater than the set seawater pump driving time, reselecting the seawater pump to be driven according to the operating time of the seawater pump, and driving the reselected seawater pump; It features.

In step (a), the seawater pump to be driven is selected according to the total operation time of each of the seawater pumps accumulated up to now.

The selection of the seawater pump to be driven is characterized in that the seawater pump to be driven first selects a small total operation time of each of the accumulated seawater pumps.

In step (e), the seawater pump to be driven is selected according to the total operating time of each of the seawater pumps accumulated up to now.

The selection of the seawater pump to be driven is characterized in that the seawater pump to be driven first selects a small total operation time of each of the accumulated seawater pumps.

According to the present invention, there is an advantage of optimizing the operating efficiency of the pump by adding an automatic shift operation function according to the operating time of the seawater pump so that each pump has an equal operating time.

In addition, according to the present invention by adding an automatic shift operation function according to the operating time of the seawater pump to have an equal operating time for each pump to optimize the operating efficiency of the pump to reduce the maintenance cost of the pump also have.

1 is a configuration diagram of a seawater pump control system of a ship according to the present invention,
2 is a flowchart illustrating a method of controlling a seawater pump of a ship according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

≪ Example 1 >

1 is a configuration diagram of a seawater pump control system of a ship according to the present invention, the seawater temperature sensor 150, seawater pump unit 110, operation time measuring unit 120, controller 130 and inverter 140 It is composed.

The seawater pump unit 110 serves to introduce seawater into the ship, but is composed of a plurality of seawater pumps, but in the present invention, three seawater pumps (seawater pump 1, seawater pump 2, seawater pump 3) Assume that

The seawater temperature sensor 150 serves to detect the temperature of the seawater and deliver it to the controller 130, and the operation time measuring unit 120 measures the operating time of the seawater pumps in the seawater pump 110. It serves to deliver to the controller 130. The operation time measuring unit 120 is provided with a time meter (Hour Meter) corresponding to each sea water pump, and measure the operation time of each sea water pump using the corresponding time meter.

The controller 130 controls the rotation speed of the seawater pumps according to the seawater temperature detected by the seawater temperature sensor 150, and controls the seawater pump according to the operation time of the seawater pumps measured by the operation time measuring unit 120. It operates alternately to control the operation time of the seawater pump evenly.

The controller 130 stores the operation time of the seawater pump measured by the operation time measuring unit 120 for each seawater pump, and alternately drives the seawater pump according to the total operation time of the seawater pumps accumulated when the seawater pump is driven. The operation time of the pump is controlled evenly.

The inverter 140 serves to control the number of rotations of the seawater pumps in the seawater pump unit 110 under the control of the controller 130.

The seawater pump control system of the ship according to the present invention configured as described above drives the seawater pump in the seawater pump unit 110 by selecting a seawater pump preset by the controller 130 at the initial stage of control. It is assumed here that the initial selection of the seawater pump is predetermined. In this case, a voltage or frequency corresponding to the initially set rotation speed is transmitted to the inverter 140, and the rotation speed of the seawater pump driven according to the transmitted voltage or frequency is adjusted.

When the seawater pump in the seawater pump unit 110 is operated in this process, the operation time measuring unit 120 measures the operation time of the seawater pump being operated and transmits it to the controller 130. For example, if there is a seawater pump 1, a seawater pump 2, a seawater pump 3, and the seawater pump 1 and the seawater pump 2 is in operation, only the operating time of the seawater pump 1 and seawater pump 2 is measured and the controller 130 in real time. )

The controller 130 divides the operation time of the seawater pump measured in real time for each seawater pump and stores the accumulated time in an internal memory. For example, for each seawater pump, the operation time and the total operation time which are currently being operated are classified and stored in the memory. Here, the operating time that is currently operating means the time that the seawater pump has been operating up to now without stopping after starting, and the total operation time is the accumulated operation time from the time when the seawater pump was first operated to the present time. Means that.

When the operating time of the currently operating seawater pump is measured, the controller 130 compares the measured driving time (operation time) of the seawater pump with the seawater pump driving time (operation time) set in advance as a reference. If the driving time of the seawater pump is less than the set seawater pump driving time (measured seawater pump driving time <set seawater pump driving time), the operation of the currently operating seawater pump is maintained.

On the contrary, if the measured driving time of the seawater pump is greater than the driving time of the set seawater pump) measured seawater pump driving time> set seawater pump driving time), the operation of the currently operating seawater pump is stopped and accumulated until now. By retrieving the total operating time of each of the seawater pumps, the seawater pump to be reselected from the seawater pump to run the shortest. For example, when the total operating time is seawater pump 1 = 35 hours, seawater pump 2 = 33 hours, seawater pump 3 = 30 hours, the seawater pump 3 and the seawater pump 2 are selected and driven as the seawater pump to be driven.

Therefore, assuming that the seawater pump 1 and the seawater pump 2 were operating before, when the set seawater pump operation time is reached, the operation of the seawater pump 1 and the seawater pump 2 is stopped, and the seawater pump 3 and the seawater pump are searched by searching the total operation time. It operates by selecting seawater pump to operate 2.

This seawater pump reselection is made every set seawater pump driving time.

On the other hand, the present invention is to select a seawater pump to operate when the seawater pump should be operated in a state in which the operation of the seawater pump is all stopped, in this case the previously set seawater pump is operated to enter the seawater into the ship Done. In this case, when the preset seawater pump is in a normal state, only a specific seawater pump is continuously operated. Therefore, the operation efficiency of the seawater pump decreases, and only a certain seawater pump accumulates and replaces during a long time of operation. Maintenance and repair costs will be incurred.

Therefore, the present invention solves all the problems caused by the operation of the existing seawater pump as described above, in order to optimize the operation efficiency of the seawater pump and to reduce the maintenance and repair costs, the operation time of the seawater pump is equally controlled. For example, when the seawater pump is to be operated, the seawater pump having the lowest total operation time is selected as the seawater pump to operate based on the total operation time of each seawater pump accumulated up to now.

By controlling the operation of the seawater pump in this way, the operating time of all seawater pumps becomes almost equal during long-term operation, which increases the operating efficiency of the seawater pump and prevents the situation where only a specific seawater pump is operated. do.

&Lt; Example 2 >

2 is a flowchart illustrating a method of controlling a seawater pump of a ship according to the present invention, comprising: (a) checking a driving mode of a seawater pump and selecting a seawater pump to be driven in an automatic control mode (S101 and S104); (b) controlling and driving the rotation speed of the selected seawater pump, and measuring and storing an operating time of the driven seawater pump (S105 and S106); (c) comparing the measured operating time (driving time) of the seawater pump with a preset seawater pump driving time (S107); (d) When the measured operating time of the seawater pump is less than the set seawater pump driving time, the operation of the currently operated seawater pump is maintained, and (e) the operating time of the measured seawater pump is driven by the set seawater pump. If greater than the time step of reselecting the seawater pump to be driven according to the operating time of the seawater pump, and driving the reselected seawater pump (S108); (f) In the manual mode by checking the driving mode of the seawater pump, the selected seawater pump is driven, and the driving time is measured and stored (S102 and S103).

The seawater pump control method of the ship according to the present invention made in this way, when it is time to drive the seawater pump, check the drive mode of the seawater pump in step S101, in the case of the manual control mode, go to step S102 to preselect the seawater pump Will be driven. Here, the pre-selected seawater pump means a seawater pump that has been normally operated before. In operation S103, the operating time of the driven seawater pump is measured and stored. The method of determining whether the manual control mode or the automatic control mode described later is determined by the operator operating an operation mode switch provided separately.

In addition, in step S101, the driving mode of the seawater pump is checked, and in the case of the automatic control mode, the seawater pump to be moved to step S104 is selected. The selection of the seawater pump here is based on the total accumulated operating hours. For example, assuming that the total operating time Ta of the seawater pump 1 is 35 hours, the total operating time Tb of the seawater pump 2 is 33 hours, and the total operating time Tc of the seawater pump 3 is 30 hours. The seawater pump to be operated is selected in the order of the least operation time (Tc> Tb> Ta). Here, the seawater pump 3 and the seawater pump 2 are selected as the seawater pump to be driven first.

In step S105, the seawater pump 3 and the seawater pump 2 selected as described above are driven, and in step S106, the driving time (T3, T2) of the seawater pump 3 and the seawater pump 2 is measured through a time meter of the operation time measuring unit 120. And store. The measured driving time can be stored separately, but cumulatively stored as the total operating time. For example, if the driving time T3 of the seawater pump 3 is 1 hour, the stored information is 1 hour of the current driving time of the seawater pump 3 and 31 hours (the previous 30 hours + 1 hour) of the total driving time. Here, the driving time of the seawater pump 1 is called T1.

Subsequently, in step S107, the measured driving time (T3, T2) of the seawater pump 3 and the seawater pump 2 and the seawater pump driving time set in advance for alternating operation of the seawater pump can be arbitrarily set by the operator. For example, assuming 2 hours). For example, T3> 2 hours and T2> 2 hours are compared, respectively. Herein, the present invention has been described as starting the seawater pump 3 and the seawater pump 2 at the same time, but since only the seawater pump 3 can be operated first, and the seawater pump 2 can be operated later, if necessary, the driving time of the seawater pump to be driven and the set seawater It is preferable to compare the driving times of the pumps respectively.

As a result of the comparison, when the driving time T3 and T2 are smaller than the set seawater pump driving time (2 hours), the driving state of the seawater pump 3 and the seawater pump 2 currently being operated is maintained, but the driving time T3 If any one of T2) is greater than the set seawater pump driving time (2 hours) (for example, T3> 2 hours), the currently operating seawater pumps (seawater pump 3, seawater pump 2) are stopped. In operation S108, the seawater pump to be driven is selected again.

Here, the re-selection method of the seawater pump to be driven is selected, based on the total operation time of each seawater pump accumulated so far, the seawater pump to be driven by selecting the seawater pump with the lowest total operation time first. Done. When the seawater pump is selected by this process, the operating time of all seawater pumps is almost equal.

Since the reselection method of the seawater pump is also made in the same way as the seawater pump selection method of step S104 described above, it will be omitted to avoid the redundant description.

The present invention solves all the problems that occur during the operation of the existing seawater pump, in order to optimize the operating efficiency of the seawater pump and to reduce the maintenance and repair costs, to control the operation time of the seawater pump evenly. For example, when the seawater pump is to be operated, the seawater pump having the lowest total operation time is selected as the seawater pump to operate based on the total operation time of each seawater pump accumulated up to now.

By controlling the operation of the seawater pump in this way, the operating time of all seawater pumps becomes almost equal during long-term operation, which increases the operating efficiency of the seawater pump and prevents the situation where only a specific seawater pump is operated. do.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

110 ... Sea water pump
120 ... Operation time measuring unit
130 ... Controller
140 ... inverter
150 ... Seawater Temperature Sensor

Claims (8)

A sea water pump unit for introducing sea water into the ship;
A seawater temperature sensor detecting a temperature of the seawater;
An operation time measuring unit measuring an operation time of the sea water pumps in the sea water pump unit;
The rotation speed of the seawater pumps is controlled according to the seawater temperature detected by the seawater temperature sensor, and the seawater pumps are alternately driven according to the operating time of the seawater pumps measured by the operation time measuring unit to equalize the operating time of the seawater pump. A controller for controlling it;
And an inverter for controlling the number of rotations of the seawater pumps in the seawater pump unit according to the control of the controller.
The seawater pump control system of claim 1, wherein the seawater pump unit comprises seawater pumps for introducing seawater into the ship.
The apparatus of claim 1,
The operation time of the seawater pump measured by the operation time measuring unit is stored for each seawater pump, and the seawater pump is alternately driven according to the total operation time of the seawater pumps accumulated when the seawater pump is driven to control the operation time of the seawater pump evenly. Sea water pump control system of the ship, characterized in that.
(a) checking a driving mode of the seawater pump and selecting a seawater pump to be driven in the automatic control mode;
(b) controlling and driving the rotation speed of the selected seawater pump, and measuring and storing an operating time of the driven seawater pump;
(c) comparing the measured operating time (driving time) of the seawater pump with a preset seawater pump driving time;
(d) maintaining the operation of the currently operated seawater pump when the measured operating time of the seawater pump is less than the set seawater pump driving time;
(e) if the measured operating time of the seawater pump is greater than the set seawater pump driving time, reselecting the seawater pump to be driven according to the operating time of the seawater pump, and driving the reselected seawater pump; Seawater pump control method of the ship characterized in that.
The method according to claim 4, wherein the step (a) selects a seawater pump to be driven according to the total operation time of each of the seawater pumps accumulated up to now.
The method of claim 5, wherein the selection of the seawater pump to be driven is performed by selecting a seawater pump to drive the total operation time of each of the accumulated seawater pumps.
The method according to claim 4, wherein the step (e) selects a seawater pump to be driven according to the total operating time of each of the seawater pumps accumulated up to now.
The method of claim 7, wherein the selection of the seawater pump to be driven is performed by selecting a seawater pump to drive the total accumulated operating time of each of the accumulated seawater pumps.

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