High-voltage and low-voltage shipborne shore power system

Abstract

The utility model discloses a high-low voltage dual-purpose shipborne shore power system which comprises 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 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 utility model relates to the technical field of ships, in particular to a high- and low-voltage dual-use shipboard shore power system. Background Art

[0002] As countries around the world prioritize port environmental pollution, major ports worldwide have begun restricting emissions from ships at port and promoting the use of shore power. Conventional terminal shore power systems are divided into high-voltage and low-voltage systems. High-voltage systems offer high voltage and capacity, but require high land grid requirements and require significant investment. Low-voltage systems offer low grid requirements and require minimal investment, but they have low voltage and capacity, making them incapable of meeting the needs of large vessels. Each port and terminal needs to consider local conditions when implementing shore power upgrades, so the type of shore power system selected cannot be standardized.

[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, shipowners tend to equip the ship with both high-voltage and low-voltage shore power systems for safety reasons.

[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] Currently, the main solutions to the problem of inconsistent shore power supply system specifications at various ports and terminals are to determine the type of shore power supply system at the berthing terminal, and then have the ship only install one high-voltage or low-voltage shore power shipboard device, or to select a berth equipped with the corresponding shore power supply system based on the type of shipboard shore power device. The second solution is to install high-voltage and low-voltage shore power shipboard systems on the ship, but not equip it with a cable management system. Only high-voltage and low-voltage shore power socket boxes are installed, and the shore power supply system is connected via the shore power cable provided by the terminal. The third solution is to install two high-voltage and low-voltage shore power shipboard systems on the ship, and equip them with a cable management system. Depending on berthing habits, only one side of the cable winch can be installed, or a central cable winch can be used, and the cable outlet direction can be optional.

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

[0007] Option 2 also suffers from poor adaptability to ships. Currently, most shore power systems at ports are equipped only with shore power socket boxes and lack shore-side cable winches, requiring ships to bring their own shore power cables. Without a cable management system, ships may need to provide or rent shore power cables, which is inconvenient to operate manually.

[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. Utility Model Content

[0009] The purpose of the utility model 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 purpose of the utility model is achieved as follows: a high-low voltage dual-use shipboard shore power system, comprising a high- 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 connection box, wherein the two cable winches are respectively used to connect the high- and low-voltage shore power and are wound with cables, and the cable winches have switchable high-voltage docking parts and low-voltage docking parts;

[0011] When high-voltage shore power is needed, 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 then connected to the high-voltage shore power connection cabinet. The high-voltage shore power connection cabinet is connected to the high-voltage shore power panel of the ship's main switchboard through the high-voltage shore power transformer;

[0012] When low-voltage shore power needs to be connected, the high- and 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- and low-voltage shore power socket conversion box, so that the dock low-voltage shore power is connected to the low-voltage shore power panel of the ship's main distribution board through 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 the cable, which is rotatably connected to the reel base;

[0016] A slip ring box is installed on the reel base and is conductive to the cable. The slip ring box is equipped with high-voltage carbon brushes and low-voltage carbon brushes, and is also equipped 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 to 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- and low-voltage shore power socket conversion box was proposed to convert the low-voltage shore power socket at the dock into a high-voltage shore power socket. The high-voltage shore power plug and socket were 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 utility model.

[0021] Figure 2 This is a diagram showing 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 This 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 . DETAILED DESCRIPTION

[0027] The following is a combination of the appended examples 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. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0028] Conventional high-voltage shore power and low-voltage shore power shipboard cable management systems are two independent systems, each consisting of a corresponding cable winch, cable, and shore power plug. The main difference between high-voltage and low-voltage shore power cables lies in their voltage ratings, which are much higher than those of low-voltage shore power cables. A 2500kVA high-voltage shore power cable typically uses two 3*95+1*50+(4*2.5)C+6F0 (62.5 / 125) cables, while a 222kW low-voltage shore power cable typically uses two 3*95+1*50+(4*2.5) cables. The high-voltage shore power cable only has six additional optical fibers, while the other core wire specifications are the same, making it possible for high-voltage and low-voltage shore power to share a common cable management system. If low-voltage shore power can utilize an improved high-voltage shore power cable management system, the corresponding cable management system can be eliminated, reducing costs and solving the problem of cable winch layout.

[0029] like Figure 1 As shown, a high- and 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 used to connect high and low voltage shore power respectively, 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 high-voltage shore power needs to be connected, the ship docks at the high-voltage shore power berth at the terminal, 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 terminal 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 through 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, it is necessary to convert the plugs and sockets. 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, and as shown in the figure, you can see the four power pins L1, L2, L3, and PE and the three control contacts P1, P2, and P3. One of the control core wires of the high voltage shore power cable is spare. The middle one is the pin definition of the low voltage shore power plug, and you can see the four power pins R, S, T, and PE and the four control contacts P1, P2, P3, and P4. 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 utilizing the spare control core wire of the high voltage shore power cable. Figure 2 As shown on the right. The high-voltage shore power compatible low-voltage shore power plug can be inserted into a conventional high-voltage shore power socket as an ordinary high-voltage shore power plug. When inserted into the high-low voltage shore power socket conversion box, it can transmit the power and control signals of the low-voltage shore power. The connection diagram of the high-low voltage shore power socket conversion box 1 is as follows Figure 3 shown.

[0034] Among them, such as 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 a cable, which is rotatably connected to a reel base 208;

[0037] A cable guide 207 for guiding the movement of the cable, wherein the cable and the cable guide 207 are movably engaged when in use;

[0038] A slip ring box 204 is mounted on the reel base 208 and is electrically conductive to the cable. The slip ring box 204 is equipped with high-voltage carbon brushes and low-voltage carbon brushes. It is also equipped with a low-voltage incoming line cabinet 206 and a high-voltage incoming line cabinet 205 that are 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] Winch control cabinet 203, the winch control cabinet 203 is installed on the reel base 208;

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

[0041] Among them, such as 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 connect to the winch control cabinet 203.

[0042] Because the voltage levels of high and low voltage shore power are different, if 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 equipped with high voltage carbon brushes and low voltage carbon brushes respectively. 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 an 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", etc. indicating directions or positional relationships are 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, and do not indicate or imply 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 based on the specific circumstances.

[0045] It will be apparent 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 considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description. It is intended that all variations within the meaning and range of equivalents of the claims be encompassed within the present invention, and any reference numerals in the claims should not be construed as limiting the claims to which they relate.

[0046] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method 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 can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A high and low voltage dual-use shipboard shore power system, characterized in that: The invention comprises a high-voltage 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-voltage 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 portion of one of the cable winches (2) is connected to the high-voltage shore power socket box at the dock via a high-voltage shore power cable, and is also connected to a high-voltage shore power connection cabinet (3). 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 via a high-voltage shore power transformer (4); When low-voltage shore power needs to be connected, the high-low voltage shore power socket conversion box (1) 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. 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 dock 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 connection box (6).

2. The high- and low-voltage dual-use 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 a cable, which is rotatably connected to a reel base (208); A slip ring box (204) is mounted 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 respectively used to connect to a low-voltage shore power connection box (6) and a high-voltage shore power connection cabinet (3).

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

4. The high- and low-voltage dual-use 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-use 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 a transmission manner.

6. The high- and low-voltage dual-use 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-use 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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