Frequency conversion control system of ship moving and positioning winch for ship

Abstract

The utility model discloses a frequency conversion control system for a ship moving and positioning winch for a ship, and belongs to the field of ship positioning, the frequency conversion control system for the winch comprises a power supply network, a transformer electrically connected with the power supply network and two sets of winch systems connected with the transformer; the winch system comprises a PLC control cabinet electrically connected with the power supply network, a frequency conversion cabinet electrically connected with the transformer and the output end of the PLC control cabinet, and four electric winches diagonally arranged on the ship and electrically connected with the PLC control cabinet and the output end of the frequency conversion cabinet. The local consoles are in one-to-one correspondence with the electric winches and are electrically connected with the input end of the PLC control cabinet; and the remote console is electrically connected with the input end of the PLC control cabinet. The winch frequency conversion control system is simple in structure, capable of achieving accurate control over ship positioning and ship moving and convenient to use.

Description

Technical Field

[0001] The present application relates to the technical field of ship positioning, and in particular to a frequency conversion control system for a ship moving and positioning winch. Background Art

[0002] Large ships need to use positioning winches to assist in ship movement and positioning when entering a port, berthing, leaving a berth, leaving a port, and operating at sea. The traditional method of ship positioning and ship moving is to use a manual operating handle to make the winch perform the cable-winding and cable-releasing action, combined with the cable constant tension control technology, and manually or automatically adjust the winch cable speed to complete the ship positioning or ship moving work. The bow winch and the stern winch are retracted at the same time to ensure that the tension of the bow and stern is balanced to complete the ship positioning work; the bow winch reels in the cable, and the stern winch releases the cable to complete the ship's forward shifting operation; the bow winch releases the cable, and the stern winch reels in the cable to complete the ship's backward shifting operation. Affected by the control accuracy, the positioning position and the ship moving position often deviate greatly from the target position, affecting the positioning and ship moving accuracy.

[0003] Therefore, the present application provides a frequency conversion control system for a ship moving and positioning winch to solve the above problems. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] The present application provides a frequency conversion control system for a ship moving and positioning winch, aiming to solve the problem in the background technology that the existing traditional ship positioning and ship moving manual control has low control accuracy, resulting in poor positioning and ship moving effects.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a frequency conversion control system for a ship moving and positioning winch, the winch frequency conversion control system comprising a power supply network, a transformer electrically connected to the power supply network, and two winch systems connected to the transformer;

[0008] The winch system comprises a PLC control cabinet electrically connected to the power supply network, a frequency conversion cabinet electrically connected to the transformer and the output end of the PLC control cabinet, four electric winches diagonally arranged on the ship and electrically connected to the output end of the PLC control cabinet and the frequency conversion cabinet, a local control console corresponding to each of the electric winches and electrically connected to the input end of the PLC control cabinet, and a remote control console electrically connected to the input end of the PLC control cabinet;

[0009] The electric winch includes a winch motor and a brake system connected to the output ends of the PLC control cabinet and the frequency converter cabinet, and a tension meter arranged on the cable of the electric winch and connected to the input end of the PLC control cabinet.

[0010] Preferably, the frequency conversion cabinet includes a frequency converter connected to an output end of the PLC control cabinet and a braking resistor connected to the frequency converter.

[0011] Preferably, the local control console and the remote control console both include a power switch, a switching switch, a parameter setting unit and a mode selection switch connected to the input end of the PLC control cabinet, and a power indicator light, an ammeter and a tension meter connected to the output end of the PLC control cabinet.

[0012] Preferably, the control system also includes a temperature sensor and a heat dissipation fan arranged on the electric winch, the temperature sensor is electrically connected to the input end of the PLC control cabinet, and the heat dissipation fan is electrically connected to the output ends of the PLC control cabinet and the frequency conversion cabinet.

[0013] Preferably, the local control console and the remote control console further include a temperature meter connected to the output end of the PLC control cabinet.

[0014] (III) Beneficial effects

[0015] The positioning winch control system is equipped with two winch systems, which can realize ship positioning and ship moving work. While ensuring the accuracy of positioning and ship moving work, the use of two winch systems can effectively share the load force of a single winch system, making the selection of positioning winches more flexible and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a system architecture diagram of a frequency conversion control system for a ship moving and positioning winch;

[0017] Figure 2 This is a structural diagram of the electric winch;

[0018] Figure 3 This is a diagram of the structure of the remote control console and the local control console;

[0019] Figure 4 The power supply schematic diagram for the winch motor;

[0020] Figure 5 This is a schematic diagram of the installation structure of the electric winch. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] Example 1

[0023] This embodiment provides a frequency conversion control system for a ship moving and positioning winch, such as Figure 1-5 As shown, the winch variable frequency control system includes a power supply network, a transformer electrically connected to the power supply network, and two winch systems connected to the transformer.

[0024] The winch system includes a PLC control cabinet electrically connected to the power supply network, a frequency conversion cabinet electrically connected to the transformer and the output end of the PLC control cabinet, four electric winches diagonally arranged on the ship and electrically connected to the PLC control cabinet and the output end of the frequency conversion cabinet, an on-site control console corresponding to the electric winches one by one and electrically connected to the input end of the PLC control cabinet, and a remote control console electrically connected to the input end of the PLC control cabinet; wherein the frequency conversion cabinet includes a frequency converter connected to the output end of the PLC control cabinet and a braking resistor connected to the frequency converter.

[0025] The electric winch comprises a winch motor and a brake system connected to the output ends of the PLC control cabinet and the frequency conversion cabinet, and a tension meter arranged on the cable of the electric winch and connected to the input end of the PLC control cabinet.

[0026] The local control console and the remote control console both include a power switch, a switching switch, a parameter setting unit and a mode selection switch connected to the input end of the PLC control cabinet, and a power indicator light, an ammeter and a tension meter connected to the output end of the PLC control cabinet. The parameter setting unit is a USB interface.

[0027] The mode selection switch is used to select a ship moving mode and a positioning mode; wherein the ship moving mode includes forward, backward, left and right movement.

[0028] When in use, turn on the power switch, switch remote / local control through the switch, and store the control program in the PLC control cabinet through the parameter setting unit. When positioning the ship, drop the anchor in the direction of the pulling force required by the winch, select the positioning mode, and the PLC control cabinet controls the electric winch to reel in the cable to tighten the cable. The tension of the cable is measured in real time through the tension meter. When the tension on the four pull ropes is inconsistent, the PLC control cabinet controls the electric winch with the smallest pulling force to reel in, so that the pulling force of the winch is consistent with the pulling force of the other electric winches, so that the ship is fixed in the corresponding position.

[0029] When moving the ship, according to the direction in which the ship needs to move, the mode of ship movement (forward, backward, left, right) is selected through the mode selection switch. When forward movement is selected, left and right are controlled; the tension on both sides is constant, and the electric winch at the front end of the ship is controlled to reel in while the electric winch at the rear end is unreeled. When the tension on the cable of the electric winch at the front end is greater than the tension on the electric winch at the rear end, the electric winch at the front end reels the cable, and the electric winch at the rear end unreels the cable, so that the ship moves forward; the reverse is true for backward movement. Similarly, when it is necessary to move left and right, ensure that the tension on the cables before and after the ship is equal, and change the tension on both sides by driving the electric winches on the left and right sides, so that the ship can move left and right. Among them, by presetting the ship moving tension level threshold, the tension of the cable is detected by the tension meter, the tension difference of the relatively set electric winches is calculated, and compared with the preset tension level threshold, the input voltage of the winch motor is changed by the frequency conversion cabinet, so as to control the output power of the winch motor and achieve energy-saving control.

[0030] It is worth mentioning that the control system can effectively reduce the load of a single winch system by installing two winch systems on the ship when eight winches are working at the same time, so that a smaller power winch combination can be selected for use. In addition, when one winch system is damaged or the electric winch in one winch system is damaged, the corresponding ship positioning / ship moving work can be continued by controlling the remaining electric winches.

[0031] Example 2

[0032] Different from Example 1, Figure 2 and Figure 4 As shown, the control system also includes a temperature sensor and a heat dissipation fan arranged on the electric winch, the temperature sensor is electrically connected to the input end of the PLC control cabinet, and the heat dissipation fan is electrically connected to the output ends of the PLC control cabinet and the frequency conversion cabinet.

[0033] When in use, the temperature of the winch motor is detected by the temperature sensor and the detected temperature is transmitted to the PLC control cabinet. The PLC control cabinet compares the detected temperature with the preset temperature. If it exceeds the preset temperature level, the cooling fan is controlled to start to cool the winch motor, thereby ensuring the stability of the winch motor operation.

[0034] Furthermore, in order to effectively monitor the operating temperature of the winch motor, the local control console and the remote control console also include a temperature meter connected to the output end of the PLC control cabinet.

[0035] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical solution and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A frequency conversion control system for a ship moving and positioning winch, characterized in that: It includes a power supply network, a transformer electrically connected to the power supply network, and two winch systems connected to the transformer; The winch system comprises a PLC control cabinet electrically connected to the power supply network, a frequency conversion cabinet electrically connected to the transformer and the output end of the PLC control cabinet, four electric winches diagonally arranged on the ship and electrically connected to the output end of the PLC control cabinet and the frequency conversion cabinet, a local control console corresponding to each of the electric winches and electrically connected to the input end of the PLC control cabinet, and a remote control console electrically connected to the input end of the PLC control cabinet; The electric winch comprises a winch motor and a brake system connected to the output ends of the PLC control cabinet and the frequency conversion cabinet, and a tension meter arranged on the cable of the electric winch and connected to the input end of the PLC control cabinet.

2. The frequency conversion control system for ship moving and positioning winches according to claim 1, characterized in that: The frequency conversion cabinet comprises a frequency converter connected to the output end of the PLC control cabinet and a braking resistor connected to the frequency converter.

3. The frequency conversion control system for ship moving and positioning winches according to claim 1, characterized in that: The local control console and the remote control console both include a power switch, a switch parameter setting unit and a mode selection switch connected to the input end of the PLC control cabinet, and a power indicator light, an ammeter and a tension meter connected to the output end of the PLC control cabinet.

4. The frequency conversion control system for ship moving and positioning winches according to claim 3 is characterized in that: The control system also includes a temperature sensor and a heat dissipation fan arranged on the electric winch, the temperature sensor is electrically connected to the input end of the PLC control cabinet, and the heat dissipation fan is electrically connected to the output ends of the PLC control cabinet and the frequency conversion cabinet.

5. The frequency conversion control system for ship moving and positioning winches according to claim 4, characterized in that: The local control console and the remote control console also include a temperature meter connected to the output end of the PLC control cabinet.

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