High-voltage and low-voltage shipborne shore power system

Abstract

The invention discloses a high-voltage and low-voltage dual-purpose shipborne shore power system which comprises a high-voltage and low-voltage shore power socket conversion box, two cable winches, a high-voltage shore power connection cabinet, a high-voltage shore power transformer, a main distribution board and a low-voltage shore power junction box. When high-voltage shore power needs to be connected, a high-voltage butt joint part of one cable winch is connected with a wharf high-voltage shore power socket box through a high-voltage shore power cable and connected with a high-voltage shore power connection cabinet, and the high-voltage shore power connection cabinet is connected into a high-voltage shore power screen of a main distribution board of a ship through a high-voltage shore power transformer. When low-voltage shore power needs to be connected, the high-low-voltage shore power socket conversion box is connected into a wharf low-voltage shore power socket box and used for converting a wharf low-voltage shore power socket into a high-voltage shore power socket, the other cable winch is switched to the low-voltage butt joint part, and a cable of the cable winch is connected into the high-low-voltage shore power socket conversion box and used for converting the wharf low-voltage shore power socket into the high-voltage shore power socket. Therefore, the low-voltage shore power of the wharf is connected to the low-voltage shore power screen of the main distribution board of the ship through the low-voltage shore power junction box.

Description

Technical Field

[0001] The present invention relates to the field of ship technology, in particular to a high- and low-voltage dual-purpose shipboard shore power system. Background Art

[0002] As countries pay more attention to port environmental pollution, major ports around the world have begun to restrict emissions from ships at port and promote the use of shore power by ships. Conventional terminal shore power supply systems are divided into high-voltage shore power supply systems and low-voltage shore power supply systems. The high-voltage shore power supply system has a high voltage level and a large power supply capacity, but it has high requirements for the land power grid and requires a large construction investment; the low-voltage shore power system has low requirements for the land power grid and requires a small construction investment, but it has a low voltage level and a small power supply capacity, and cannot meet the requirements of large ships. When carrying out shore power transformation at various ports and terminals, it is necessary to consider the actual local conditions, so the type of shore power supply system selected cannot be unified.

[0003] In view of the problem of inconsistent specifications of shore power supply systems at various ports and terminals, when designing a ship, unless the shipowner can determine the type of shore power supply system used at the berthing terminal, in many cases, for the sake of safety, the shipowner tends to equip the ship with both high-voltage and low-voltage shore power systems.

[0004] Both the high-voltage shore power and low-voltage shore power shipboard systems require a cable management system, which is not only costly but also difficult to deploy, affecting the design of the ship's mooring, gangway and cargo hold.

[0005] At present, the main solution to the problem of inconsistent specifications of shore power supply systems at various ports and terminals is to determine the type of shore power supply system at the berthing terminal, and only install one set of high-voltage or low-voltage shore power shipboard device on the ship, or select a berth equipped with a corresponding type of shore power supply system according to the type of ship-borne shore power device. The second solution is to install high-voltage and low-voltage shore power shipboard systems on the ship, but not equipped with a cable management system, only high-voltage and low-voltage shore power socket boxes are set up, and the shore power supply system is connected through the shore power cable provided by the terminal. The third solution is to install two sets of high-voltage and low-voltage shore power shipboard systems on the ship, and equip them with a cable management system. According to the berthing habits, only one side of the cable winch can be installed, or a mid-mounted cable winch can be used, and the cable outlet direction can be optional.

[0006] The disadvantage of Option 1 is that the ship has poor adaptability. Since only one set of shore power shipboard equipment is installed, it can only dock at berths with corresponding shore power supply systems.

[0007] The disadvantage of Option 2 is also poor adaptability to ships. Currently, most shore power construction at docks is only equipped with shore power socket boxes, and no shore-side cable winches are installed, requiring ships to bring their own shore power cables. If there is no cable management system, it may be necessary to prepare or rent shore power cables, which is inconvenient for manual operation.

[0008] The disadvantages of Option 3 are high cost, large ship area occupation, difficulty in layout, and impact on the design of ship moorings, gangways and cargo holds. Summary of the invention

[0009] The purpose of the present invention is to provide a high- and low-voltage dual-use shipboard shore power system, which saves a set of low-voltage shore power cable management systems, saves costs, and reduces the difficulty of arranging the cable management system.

[0010] The object of the present invention is achieved as follows: A high-low voltage dual-use shipboard shore power system, comprising a high-low voltage shore power socket conversion box, two cable winches, a high-voltage shore power connection cabinet, a high-voltage shore power transformer, a main switchboard, and a low-voltage shore power connection box, wherein the two cable winches are respectively used to connect the high-voltage and low-voltage shore power and are wound with cables, and the cable winches have a switchable high-voltage docking part and a low-voltage docking part;

[0011] When high-voltage shore power needs to be connected, the high-voltage docking part of one of the cable winches is connected to the high-voltage shore power socket box at the dock through the high-voltage shore power cable, and is connected to the high-voltage shore power connection cabinet, which is connected to the high-voltage shore power panel of the main switchboard of the ship through the high-voltage shore power transformer;

[0012] When it is necessary to connect to the low-voltage shore power, the high-low voltage shore power socket conversion box is connected to the dock low-voltage shore power socket box to convert the dock low-voltage shore power socket into a high-voltage shore power socket. The other cable winch is switched to the low-voltage docking part, and its cable is connected to the high-low voltage shore power socket conversion box, so that the dock low-voltage shore power can be connected to the low-voltage shore power panel of the ship's main distribution board via the low-voltage shore power junction box.

[0013] Furthermore, the cable winch comprises:

[0014] A reel base, which is fixedly connected to the vessel;

[0015] A reel for winding a cable, which is rotatably connected to a reel base;

[0016] A slip ring box installed on the reel base and conductive with the cable, the slip ring box is provided with high-voltage carbon brushes and low-voltage carbon brushes, and is provided with a low-voltage incoming line cabinet and a high-voltage incoming line cabinet electrically connected to the shore power cable. The low-voltage incoming line cabinet and the high-voltage incoming line cabinet are used to connect the low-voltage shore power connection box and the high-voltage shore power connection cabinet respectively.

[0017] The beneficial effects of the present invention are:

[0018] 1. A high-low voltage shore power socket conversion box is proposed to convert the low-voltage shore power socket of the dock into a high-voltage shore power socket, and the high-voltage shore power plug and socket are improved to make them compatible with the low-voltage shore power system;

[0019] 2. Improve the high-voltage shore power cable winch and equip its slip ring box with two sets of high-voltage and low-voltage carbon brushes, which have high- and low-voltage switching functions. If it is connected to the low-voltage shore power system, it can be connected to the low-voltage incoming line cabinet and then connected to the ship's low-voltage shore power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a system layout diagram of the present invention.

[0021] Figure 2 This is a diagram of the pin definitions for high and low voltage shore power plugs.

[0022] Figure 3 This is a connection diagram of the high and low voltage shore power socket conversion box.

[0023] Figure 4 It is the wiring diagram of the cable winch.

[0024] Figure 5 It is a structural diagram of a cable winch.

[0025] Figure 6 yes Figure 5 Left view of .

[0026] Figure 7 yes Figure 5 Top view of the . DETAILED DESCRIPTION

[0027] The following will be combined with the attached embodiment of the present invention Figure 1-7 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The cable management systems of conventional high-voltage shore power and low-voltage shore power shipboard devices are two independent systems, which are respectively composed of corresponding cable winches, cables and shore power plugs. The main difference between high-voltage shore power cables and low-voltage shore power cables is the different voltage resistance levels. The voltage resistance level of high-voltage shore power cables is much higher than that of low-voltage shore power cables. High-voltage shore power cables with a capacity of 2500kVA generally use 2 3*95+1*50+(4*2.5)C+6F0(62.5 / 125), and low-voltage shore power cables with a capacity of 222kW generally use 2 3*95+1*50+(4*2.5). High-voltage shore power cables only have 6 more optical fibers, and the other core wire specifications are the same, making it possible for high-voltage shore power and low-voltage shore power to share a cable management system. If low-voltage shore power can use the improved high-voltage shore power cable management system, the corresponding cable management system can be omitted, which not only solves the cost, but also solves the problem of cable winch layout.

[0029] like Figure 1 As shown, a high-low voltage dual-use shipboard shore power system is provided, including a high- and low-voltage shore power socket conversion box 1, two cable winches 2, a high-voltage shore power connection cabinet 3, a high-voltage shore power transformer 4, a main distribution board 5, and a low-voltage shore power connection box 6.

[0030] Among them, the two cable winches 2 are located on the left and right sides of the hull. The two cable winches 2 are respectively used to connect high and low voltage shore power and are wrapped with cables. The cable winches 2 have switchable high voltage docking parts and low voltage docking parts, which can switch between high voltage shore power mode and low voltage shore power mode.

[0031] When it is necessary to connect to high-voltage shore power, the ship docks at the high-voltage shore power berth at the wharf, and the high-voltage docking part of one of the cable winches 2 (also on the berthing side) is connected to the high-voltage shore power socket box at the wharf through the high-voltage shore power cable, which is equivalent to switching the cable winch 2 to the high-voltage shore power mode and connecting it to the high-voltage shore power connection cabinet 3 through the cable. The high-voltage shore power connection cabinet 3 is connected to the high-voltage shore power panel 5a of the ship's main distribution board 5 through the high-voltage shore power transformer 4.

[0032] When it is necessary to connect to low-voltage shore power, the ship docks at the low-voltage shore power berth at the wharf, connects the high- and low-voltage shore power socket conversion box 1 to the wharf low-voltage shore power socket box, converts the wharf low-voltage shore power socket into a high-voltage shore power socket, and switches the other cable winch 2 (also on the berthing side) to the low-voltage docking part, which is equivalent to switching to the low-voltage shore power mode, and its high-voltage shore power cable is connected to the high- and low-voltage shore power socket conversion box 1, so that the wharf low-voltage shore power is connected to the low-voltage shore power panel 5b of the ship's main distribution board 5 via the low-voltage shore power junction box 6.

[0033] To solve the problem of high-voltage shore power cable management system being compatible with low-voltage shore power system, plug and socket conversion is required. Figure 2 The pin definitions of high and low voltage shore power plugs are shown in the figure. The left one is the pin definition of the high voltage shore power plug. As shown in the figure, four power pins L1, L2, L3, and PE and three control contacts P1, P2, and P3 can be seen. One of the control cores of the high voltage shore power cable is spare. The middle one is the pin definition of the low voltage shore power plug. Four power pins R, S, T, and PE and four control contacts P1, P2, P3, and P4 can be seen. As can be seen from the figure, the high voltage shore power plug has one less control contact than the low voltage shore power plug. Therefore, this embodiment improves the high voltage shore power plug by adding a control contact and using the spare control core of the high voltage shore power cable, such as Figure 2 As shown on the right. The high-voltage shore power plug is compatible with the low-voltage shore power plug. It can be used as a normal high-voltage shore power plug when inserted into a conventional high-voltage shore power socket. It can transmit the power and control signal of the low-voltage shore power when inserted into the high-low voltage shore power socket conversion box. The connection diagram of the high-low voltage shore power socket conversion box 1 is as follows Figure 3 shown.

[0034] Among them, Figure 5-7 As shown, the cable winch 2 comprises:

[0035] A reel base 208, which is fixedly connected to the vessel;

[0036] A reel 209 for winding the cable, which is rotatably connected to the reel base 208;

[0037] A cable guide 207 for guiding the movement of the cable, the cable and the cable guide 207 being movably matched when in use;

[0038] A slip ring box 204 is installed on the reel base 208 and is electrically conductive with the cable. The slip ring box 204 is provided with a high-voltage carbon brush and a low-voltage carbon brush, and is provided with a low-voltage incoming line cabinet 206 and a high-voltage incoming line cabinet 205 electrically connected to the shore power cable. The low-voltage incoming line cabinet 206 and the high-voltage incoming line cabinet 205 are used to connect to the low-voltage shore power connection box 6 and the high-voltage shore power connection cabinet 3 respectively;

[0039] A winch control cabinet 203, which is mounted on a reel base 208;

[0040] The variable frequency motor 201 and the reduction box 202, the variable frequency motor 201 is controlled by the winch control cabinet 203, the shell of the reduction box 202 is fixedly connected to the reel base 208, the shell of the variable frequency motor 201 is fixedly connected to the shell of the reduction box 202, the main shaft of the variable frequency motor 201, the transmission structure of the reduction box 202, and the rotating shaft of the reel 209 are sequentially connected in transmission.

[0041] Among them, Figure 4 As shown, the slip ring box 204 is provided with a photoelectric conversion unit, which is used to convert the optical fiber signal of the high-voltage shore power into an RS485 serial port signal to be connected to the winch control cabinet 203.

[0042] Because the voltage levels of high and low voltage shore power are different, if the high voltage shore power is connected to the low voltage shore power system, the corresponding components will be damaged. Therefore, this embodiment improves the conventional high voltage shore power winch slip ring box. The slip ring box 204 of this embodiment is provided with high voltage carbon brushes and low voltage carbon brushes. By switching them, the shore power cable can be connected to the low voltage incoming line cabinet 206 and the high voltage incoming line cabinet 205 respectively. At the same time, the photoelectric conversion unit of the slip ring box 204 converts the optical fiber signal of the high voltage shore power into the RS485 serial port signal and connects it to the winch control cabinet 203. The wiring diagram of the cable winch 2 is shown as follows: Figure 4 shown.

[0043] Compared with conventional high-voltage shore power cable winches, the slip ring box 204 of the cable winch 2 of this embodiment is equipped with two sets of high-voltage and low-voltage carbon brushes, has a high-low voltage switching function, and adds a low-voltage incoming line cabinet 206.

[0044] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention; in the present invention, it should also be noted that the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integrally formed connection, a mechanical connection, or an indirect connection through an intermediate connecting component, and the specific meaning of the terms in this utility model can be understood according to the specific circumstances.

[0045] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be regarded as limiting the claims involved.

[0046] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high and low voltage dual-purpose shipboard shore power system, characterized in that: The invention comprises a high- and low-voltage shore power socket conversion box (1), two cable winches (2), a high-voltage shore power connection cabinet (3), a high-voltage shore power transformer (4), a main distribution board (5), and a low-voltage shore power connection box (6), wherein the two cable winches (2) are respectively used to connect the high- and low-voltage shore power and are wound with cables, and the cable winches (2) have a switchable high-voltage docking part and a low-voltage docking part; When high-voltage shore power needs to be connected, the high-voltage docking part of one of the cable winches (2) is connected to the high-voltage shore power socket box at the dock through the high-voltage shore power cable, and is connected to the high-voltage shore power connection cabinet (3), and the high-voltage shore power connection cabinet (3) is connected to the high-voltage shore power panel (5a) of the main switchboard (5) of the ship through the high-voltage shore power transformer (4); When it is necessary to connect low-voltage shore power, the high-low voltage shore power socket conversion box (1) is connected to the low-voltage shore power socket box at the dock to convert the low-voltage shore power socket at the dock into a high-voltage shore power socket. Another cable winch (2) is switched to a low-voltage docking portion, and its cable is connected to the high-low voltage shore power socket conversion box (1), so that the low-voltage shore power at the dock is connected to the low-voltage shore power panel (5b) of the main switchboard (5) of the ship via the low-voltage shore power connection box (6).

2. A high and low voltage dual-purpose shipboard shore power system according to claim 1, characterized in that: The cable winch (2) comprises: A reel base (208) fixedly connected to the vessel; A reel (209) for winding the cable, which is rotatably connected to the reel base (208); A slip ring box (204) is installed on a reel base (208) and is electrically conductive with the cable. The slip ring box (204) is provided with a high-voltage carbon brush and a low-voltage carbon brush, and is provided with a low-voltage incoming line cabinet (206) and a high-voltage incoming line cabinet (205) electrically connected to the shore power cable. The low-voltage incoming line cabinet (206) and the high-voltage incoming line cabinet (205) are used to connect to a low-voltage shore power connection box (6) and a high-voltage shore power connection cabinet (3), respectively.

3. A high and low voltage dual-purpose shipboard shore power system according to claim 2, characterized in that: The cable winch (2) further comprises a winch control cabinet (203), wherein the winch control cabinet (203) is installed on a reel base (208).

4. A high and low voltage dual-purpose shipboard shore power system according to claim 3, characterized in that: The slip ring box (204) is provided with a photoelectric conversion unit, and the photoelectric conversion unit is used to convert the optical fiber signal of the high-voltage shore power into an RS485 serial port signal to be connected to the winch control cabinet (203).

5. The high and low voltage dual-purpose shipboard shore power system according to claim 3, characterized in that: The cable winch (2) further comprises a variable frequency motor (201) and a reduction box (202); the variable frequency motor (201) is controlled by a winch control cabinet (203); the housing of the reduction box (202) is fixedly connected to a reel base (208); the housing of the variable frequency motor (201) is fixedly connected to the housing of the reduction box (202); the main shaft of the variable frequency motor (201), the transmission structure of the reduction box (202), and the rotating shaft of the reel (209) are sequentially connected in transmission.

6. The high and low voltage dual-purpose shipboard shore power system according to claim 3, characterized in that: The cable winch (2) further comprises a cable guide (207) for guiding the movement of the cable, and the cable and the cable guide (207) are movably matched when in use.

7. A high and low voltage dual-purpose shipboard shore power system according to any one of claims 1 to 6, characterized in that: The two cable winches (2) are respectively located at the port and starboard sides of the hull.

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