Shipborne positive-pressure explosion-proof shore power connection station

Abstract

The utility model discloses a shipborne positive-pressure explosion-proof shore power connection station, and the connection station comprises a positive-pressure explosion-proof box body which is provided with a sealed space and is filled with compressible inert gas to maintain a positive-pressure state; the airtight door is arranged on the positive-pressure explosion-proof box body in an openable / closable manner, and a shore power cable through opening is formed in the airtight door; the fan ventilation device comprises an air inlet pipeline communicated with the closed space and an air outlet pipeline communicated with the closed space through an anti-explosion valve fan, and the air inlet pipeline and the air outlet pipeline are each provided with a first anti-explosion valve; the pressure sensor is arranged in the closed space of the positive pressure explosion-proof box body; and the shore power socket box is arranged on the positive-pressure explosion-proof box body and is butted with a cable between the wharf shore power and the ship shore power box. Through the explosion-proof design, safety monitoring and control and adaptation to specific requirements of an oil ship, the explosion-proof problem of the existing shore power socket box is effectively solved, and the shore power socket box has the advantages of safety, environmental protection, convenience in operation and the like.

Description

Technical Field

[0001] The utility model relates to a ship shore power explosion-proof device, in particular to a shipborne positive pressure explosion-proof type shore power connection place. Background Art

[0002] At present, using shore power is an economical, effective and rapid way to achieve "zero carbon emissions" for ships berthed at ports. The onshore power supply system converts the grid power into the power with the voltage and frequency levels required by the ship through transformers, inverters and isolation transformers, and sends it to the terminal junction box; the ship's power receiving system is a part of the ship's power distribution system, mainly composed of a cable winch or a shore power socket box, a shipborne transformer and an electrical management system.

[0003] However, the existing shore power socket boxes are usually of non-explosion-proof type, and it is difficult to develop an explosion-proof type shore power socket box that meets the use requirements of oil chemical ships, which leads to difficulties in the application of installing the ship shore power system on oil chemical ships. To solve this problem, researchers are looking for new technologies and solutions to meet the explosion-proof requirements of oil chemical ships and ensure that the ship can use clean shore power when berthed. Summary of the Utility Model

[0004] In order to solve the deficiencies of the above technologies, the utility model provides a shipborne positive pressure explosion-proof type shore power connection place.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is a shipborne positive pressure explosion-proof type shore power connection place, including:

[0006] A positive pressure explosion-proof box body, having a sealed space and filled with a compressible inert gas to maintain a positive pressure state;

[0007] An airtight door, which is openable / closable and arranged on the positive pressure explosion-proof box body, and an onshore power cable through hole is arranged on the airtight door;

[0008] A fan ventilation device, including an intake pipe communicating with the sealed space and an exhaust pipe communicating with the sealed space through an explosion-proof valve fan, and a first explosion-proof valve is arranged on both the intake pipe and the exhaust pipe;

[0009] A pressure sensor, arranged in the sealed space of the positive pressure explosion-proof box body;

[0010] An onshore power socket box, arranged on the positive pressure explosion-proof box body to connect the cable between the terminal onshore power and the ship's onshore power box.

[0011] Furthermore, the onshore power cable through hole is located on the edge of the openable side of the airtight door. The onshore power cable through hole includes two symmetrical semi-circular connectors, and the two semi-circular connectors are fixedly connected by bolts on both side end plates and enclose a circular through hole, and a rubber gasket is arranged in a matching manner in the circular through hole.

[0012] Furthermore, a compressible inert gas is filled into the positive pressure explosion-proof box body through an automatic air replenishment and pressure regulation device. The automatic air replenishment and pressure regulation device includes an inert gas filling pipeline, and a second explosion-proof valve is provided on the inert gas filling pipeline.

[0013] Furthermore, a lamp and an image acquisition device are provided at the top of the closed space of the positive pressure explosion-proof box body.

[0014] Furthermore, a limit switch is provided on the airtight door.

[0015] The utility model discloses a shipborne positive pressure explosion-proof type shore power connection place. Through the explosion-proof design of the positive pressure explosion-proof box body, which is made of metal materials, sufficient mechanical strength and corrosion resistance are ensured, and a positive pressure state is maintained inside to effectively prevent external explosive gases from entering the box body. The use of the automatic air replenishment and pressure regulation device and the explosion-proof valve ensures a continuous slightly positive pressure state inside the box, avoiding the accumulation of explosive gases in the box. The pressure sensor monitors the internal pressure of the box body, and the automatic air replenishment and pressure regulation device adjusts the inflation volume according to the signal of the pressure sensor to maintain the positive pressure state. The limit switch detects the opening state of the airtight door to ensure that the electrical system can be powered on only when the airtight door is closed. The fan ventilation device purges the internal environment before operation to remove dangerous gases. At the same time, it meets the requirements of oil tankers and chemical tankers, and the overall design meets the explosion-proof requirements of oil tankers and chemical tankers, allowing these types of ships to safely use shore power when berthed at the port. Brief Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is Figure 1 a side view of

[0018] Figure 3 It is a schematic diagram of the internal structure of the utility model.

[0019] Figure 4 It is a position and disassembly schematic diagram of the shore power cable through-hole on the airtight door.

[0020] In the figure: 100, positive pressure explosion-proof box body; 200, airtight door; 300, fan ventilation device; 400, pressure sensor; 500, shore power socket box; 600, automatic air replenishment and pressure regulation device; 700, lamp; 800, image acquisition device; 210, shore power cable through-hole; 211, semi-circular connecting piece; 212, bolt; 213, rubber sealing gasket; 220, limit switch; 310, intake pipeline; 320, exhaust pipeline; 330, first explosion-proof valve; 340, explosion-proof valve fan; 610, inert gas filling pipeline; 620, second explosion-proof valve. Detailed Description of the Embodiment

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] like Figures 1-3 The shipboard positive pressure explosion-proof shore power connection space shown includes:

[0023] The positive pressure explosion-proof box 100 has an outer shell made of metal materials such as carbon steel and stainless steel. The outer shell has sufficient mechanical strength and corrosion resistance. The interior has a closed space and is filled with compressible inert gas to maintain a positive pressure state. The positive pressure explosion-proof box 100 is filled with compressible inert gas through an automatic air supply and pressure regulating device 600. The automatic air supply and pressure regulating device includes an inert gas filling pipeline 610, and the inert gas filling pipeline 610 is provided with a No. 2 explosion-proof valve 620.

[0024] The airtight door 200 can be opened / closed and is set on the positive pressure explosion-proof box 100. It can be used for personnel to enter and exit. In the closed state, it can withstand an air pressure of 0.2Mpa. The airtight door 200 has a limit switch 220 to detect the opening state of the airtight door and ensure that the airtight door is in a closed state when the power is on. The airtight door 200 is provided with a shore power cable through-hole 210 for conveying control cables; Figure 4 The shore power cable through-hole 210 shown is located on the edge of the openable side of the airtight door 200. The shore power cable through-hole 210 includes two symmetrical semicircular connectors 211. The two semicircular connectors 211 are fixedly connected by bolts 212 on the end plates on both sides and enclose a circular through-hole. A rubber sealing gasket 213 is matched in the circular through-hole.

[0025] The fan ventilation device 300 includes an air intake pipe 310 connected to the enclosed space, and an exhaust pipe 320 connected to the enclosed space through an explosion-proof valve fan 340. The air intake pipe 310 and the exhaust pipe 320 are both provided with a No. 1 explosion-proof valve 330. The fan ventilation device 300 is used to control gas emissions, especially after the replacement of dangerous gases is completed, the shore power socket box can be connected to the power supply. In this embodiment, the diameter of the air intake pipe 310 and the exhaust pipe 320 is 1000 cm 3 The volume of the positive pressure shell is not less than 1cm 2 To calculate, to ensure adequate purging within the appropriate time.

[0026] The pressure sensor 400 is arranged in the closed space of the positive pressure explosion-proof box 100. The pressure sensor can detect the pressure value in the space by using inert gas as the gas source to maintain a slightly positive pressure state.

[0027] The shore power socket box 500 is arranged on the positive pressure explosion-proof box 100 to connect the cable between the dock shore power and the ship shore power box.

[0028] Meanwhile, at the top of the enclosed space of the positive pressure explosion-proof box body 100, there are a lamp 700 and an image acquisition device 800; the lamp 700 provides illumination, and the image acquisition device 800 ensures that there is no one in the place when it is in the powered-on state.

[0029] The utility model is a shipborne positive pressure explosion-proof type shore power connection place, and its working principle revolves around the following process: Establishment of a positive pressure environment: Compressible inert gas is filled into the positive pressure explosion-proof box body 100 through an automatic air replenishment and pressure regulation device 600 to maintain the positive pressure state inside the box body. Specifically, the inert gas passes through an inert gas filling pipeline 610 and enters the box body through a second explosion-proof valve 620.

[0030] Air pressure monitoring and regulation: A pressure sensor 400 is used to monitor the pressure value inside the positive pressure explosion-proof box body 100 to ensure that it is in a slightly positive pressure state. The automatic air replenishment and pressure regulation device 600 automatically adjusts the inflation volume according to the signal of the pressure sensor to maintain a constant positive pressure environment.

[0031] Safety protection and operation: The opening state of the airtight door 200 is detected by a limit switch 220. Only when the airtight door is completely closed can the electrical system be powered on, thus ensuring the safety of the operator. A fan ventilation device 300 is used to purge the internal environment before operation to remove dangerous gases and ensure the safety of operation.

[0032] It should be noted that among them, the pressure sensor, shore power socket box, lamp, image acquisition device, limit switch, first explosion-proof valve, and second explosion-proof valve all adopt commercially available devices. The control system on the ship will automatically adjust the operation of the automatic air replenishment and pressure regulation device 600 according to the signal of the pressure sensor 400 to maintain a positive pressure environment. The control system will also control the power on and off of the shore power system according to the signal of the limit switch 220 to ensure operation under the condition that the airtight door is closed. The start and stop of the fan ventilation device 300 are also automatically controlled by the control system according to the operation requirements to ensure power connection operation in a safe environment.

[0033] In summary, the present utility model solves the problems mentioned in the background art in the following ways. Through the explosion-proof design of the positive pressure explosion-proof box body 100, which is made of metal materials to ensure sufficient mechanical strength and corrosion resistance, and maintains a positive pressure state inside, effectively preventing external explosive gases from entering the box body. The use of the automatic air replenishment and pressure regulating device 600 and the explosion-proof valve 620 ensures a continuous slightly positive pressure state inside the box, avoiding the accumulation of explosive gases inside the box. The pressure sensor 400 monitors the internal pressure of the box body, and the automatic air replenishment and pressure regulating device 600 adjusts the air filling amount according to the signal of the pressure sensor to maintain the positive pressure state. The limit switch 220 detects the opening state of the airtight door 200 to ensure that the electrical system can be powered on only when the airtight door is closed. The fan ventilation device 300 purges the internal environment before operation to remove dangerous gases. At the same time, it meets the requirements of oil chemical tankers, and the overall design meets the explosion-proof requirements of oil chemical tankers, allowing these types of ships to safely use shore power when berthed at the port.

[0034] Advantages of the present utility model: Improve safety. The design of the positive pressure explosion-proof box body and the explosion-proof valve reduces the risks of explosion and fire. The safety monitoring and control system ensures safety during the operation process.

[0035] Environmental benefits: By using shore power, carbon emissions and other pollutant emissions during the berthing of ships at the port are reduced, contributing to the construction of a green port.

[0036] Operational convenience: The design of the airtight door and the setting of the shore power cable through-hole enable operators to conveniently connect and disconnect the cables. The automatic control system simplifies the operation process and reduces the possibility of human errors.

[0037] In short, through the explosion-proof design, safety monitoring and control, and adaptation to the specific requirements of oil chemical tankers, the present utility model effectively solves the explosion-proof problem of the existing shore power socket box and brings multiple benefits such as safety, environmental protection, and operational convenience.

[0038] The above embodiments are not limitations to the present utility model, and the present utility model is not limited to the above examples either. Changes, modifications, additions, or substitutions made by those skilled in the art within the scope of the technical solution of the present utility model also fall within the protection scope of the present utility model.

Claims

1. A shipborne positive pressure explosion-proof shore power connection location, characterized in that: include: A positive pressure explosion-proof box (100) has a closed space and is filled with compressible inert gas to maintain a positive pressure state; An airtight door (200) is provided on the positive pressure explosion-proof box (100) and can be opened / closed. A shore power cable through-hole (210) is provided on the airtight door (200); The fan ventilation device (300) comprises an air intake pipeline (310) connected to the enclosed space, and an exhaust pipeline (320) connected to the enclosed space via an explosion-proof valve fan (340), wherein both the air intake pipeline (310) and the exhaust pipeline (320) are provided with a No. 1 explosion-proof valve (330); A pressure sensor (400) is arranged in a closed space of a positive pressure explosion-proof box (100); The shore power socket box (500) is arranged on the positive pressure explosion-proof box (100) to connect the cable between the dock shore power and the ship shore power box.

2. The shipborne positive pressure explosion-proof shore power connection location according to claim 1 is characterized in that: The shore power cable through-hole (210) is located on the edge of the openable side of the airtight door (200), and the shore power cable through-hole (210) includes two symmetrical semicircular connectors (211). The two semicircular connectors (211) are fixedly connected by bolts (212) on the end plates on both sides and enclose a circular through-hole, and a rubber sealing gasket (213) is matched and arranged in the circular through-hole.

3. The shipborne positive pressure explosion-proof shore power connection location according to claim 2 is characterized in that: The positive pressure explosion-proof box (100) is filled with compressible inert gas through an automatic gas supply and pressure regulating device (600), the automatic gas supply and pressure regulating device comprises an inert gas supply pipeline (610), and a second explosion-proof valve (620) is provided on the inert gas supply pipeline (610).

4. The shipborne positive pressure explosion-proof shore power connection location according to claim 3 is characterized by: A lamp (700) and an image acquisition device (800) are provided on the top of the enclosed space of the positive pressure explosion-proof box (100).

5. The shipborne positive pressure explosion-proof shore power connection location according to claim 4 is characterized in that: The airtight door (200) is provided with a limit switch (220).

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