A dual natural gas valve unit for both a primary and a secondary machine

Abstract

The utility model discloses a kind of double natural gas valve unit for simultaneously supplying main engine and auxiliary engine, it is related to natural gas valve technology field, including gas supply main pipeline and sequentially connected gas rough filter, bus pressure sensor and bus temperature sensor with gas supply main pipeline, gas supply main pipeline is respectively connected with the main engine gas supply pipeline being equipped with main engine pressure regulating follow-up valve and the auxiliary engine gas supply pipeline being equipped with auxiliary engine pressure regulating follow-up valve by three-way pipe, main engine gas supply pipeline is sequentially connected with main engine gas fine filter, main engine pneumatic valve and main engine gas supply port, auxiliary engine gas supply pipeline is sequentially connected with auxiliary engine gas fine filter, auxiliary engine pneumatic valve and auxiliary engine gas supply port, main engine pressure regulating follow-up valve and auxiliary engine pressure regulating follow-up valve are connected to with engine intake manifold connection port connection follow-up valve balance pipeline.The utility model can simultaneously supply natural gas for ship main engine and auxiliary engine, effectively solve the problem that traditional dispersed pipe system occupies large space, installation and maintenance are inconvenient.

Description

Technical Field

[0001] This utility model relates to the field of natural gas valve technology, and in particular to a dual natural gas valve unit that supplies power to both the main unit and the auxiliary unit. Background Technology

[0002] Liquefied natural gas (LNG) is natural gas produced from gas fields that has undergone purification and a series of cryogenic liquefaction processes to obtain a liquid form at atmospheric pressure. It is widely recognized as the cleanest fossil fuel on Earth. The fuel economy and environmental advantages of natural gas are driving the rapid development of LNG-fueled ship technology. LNG-fueled ship technology refers to ships powered by LNG fuel. Compared to ships powered by fuel oil, ships using LNG as fuel can significantly reduce emissions of sulfur oxides, nitrogen oxides, and carbon dioxide without affecting the ship's propulsion. This helps the shipping industry meet increasingly stringent environmental regulations and improves the economic and environmental aspects of ship operation.

[0003] Ships have both high-pressure and medium / low-pressure gas supply needs, such as the high gas pressure required by the main engine to ensure the ship's power output, and the need for gas pressure that is lower for generators and boilers. Therefore, ship propulsion systems typically require independent natural gas supply piping systems for the main engine and auxiliary engines—namely, high-pressure and low-pressure gas supply systems. However, these two independent gas supply systems occupy significant space on the ship and have complex structures, making maintenance difficult. Utility Model Content

[0004] To address the technical problem that existing technologies have two independent air supply systems for the main engine and auxiliary engines, which occupy a large amount of ship space and have a relatively complex structure, making it inconvenient to maintain the ship's air supply system, this utility model provides the following technical solution.

[0005] This utility model discloses a dual-unit natural gas valve for simultaneously supplying both a main engine and an auxiliary engine. It includes a main gas supply pipeline and a gas coarse filter, a bus pressure sensor, and a bus temperature sensor connected sequentially to the main gas supply pipeline. The main gas supply pipeline is connected via a tee to a main engine gas supply pipeline equipped with a main engine pressure regulating follow-up valve and an auxiliary engine gas supply pipeline equipped with an auxiliary engine pressure regulating follow-up valve. The main engine gas supply pipeline is sequentially connected to a main engine gas fine filter, a main engine pneumatic valve, and a main engine gas supply port. The auxiliary engine gas supply pipeline is sequentially connected to an auxiliary engine gas fine filter, an auxiliary engine pneumatic valve, and an auxiliary engine gas supply port. Both the main engine pressure regulating follow-up valve and the auxiliary engine pressure regulating follow-up valve are connected to a follow-up valve balance pipeline connected to the engine intake manifold.

[0006] As a further technical solution, the main unit gas fine filter and the main unit pneumatic valve are connected to a three-way pipe equipped with a main unit automatic vent valve, the auxiliary unit gas fine filter and the auxiliary unit pneumatic valve are connected to a three-way pipe equipped with an auxiliary unit automatic vent valve, and both the main unit automatic vent valve and the auxiliary unit automatic vent valve are connected to the gas guide line.

[0007] As a further technical solution, the air pipeline is connected to an air compressor and a storage tank.

[0008] As a further technical solution, a main unit pressure sensor and a main unit temperature sensor, as well as an auxiliary unit pressure sensor and an auxiliary unit temperature sensor, are respectively connected before the main unit gas supply port and the auxiliary unit gas supply port.

[0009] As a further technical solution, a fresh air duct is connected to the outside of the main unit air supply pipeline and the auxiliary unit air supply pipeline, and a fan is connected to the fresh air duct.

[0010] As a further technical solution, both the main engine gas supply port and the auxiliary engine gas supply port are connected to GVU interface flanges.

[0011] The beneficial effects of this invention are that it integrates two independent gas supply channels into one unit. Through a highly integrated modular design, it can simultaneously supply natural gas to both the ship's main engine and auxiliary engines, and features filtration, pressure stabilization, emergency shut-off, parameter monitoring, and remote control functions. Furthermore, this valve unit has a compact structure, high safety, and complies with relevant ship safety regulations. It effectively solves the problems of large space occupation and inconvenient installation and maintenance associated with traditional decentralized pipeline systems, improving the utilization rate of ship space and the maintenance efficiency of the ship's gas supply system. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the dual natural gas valve unit that supplies both the main unit and the auxiliary unit according to this utility model; In the diagram: 1-Main gas supply line; 2-Gas coarse filter; 3-Bus pressure sensor; 4-Bus temperature sensor; 5-Main unit gas supply line; 6-Auxiliary unit gas supply line; 7-Main unit pressure regulating follow-up valve; 8-Auxiliary unit pressure regulating follow-up valve; 9-Main unit gas fine filter; 10-Auxiliary unit gas fine filter; 11-Follow-up valve balance line; 12-Engine intake manifold connection port; 13-Main unit pneumatic valve; 14-Auxiliary unit pneumatic valve; 15-Main unit pressure sensor; 16-Main unit temperature sensor; 17-Auxiliary unit pressure sensor; 18-Auxiliary unit temperature sensor; 19-Main unit gas supply port; 20-Auxiliary unit gas supply port; 21-Gas guide line; 22-Main unit automatic vent valve; 23-Auxiliary unit automatic vent valve; 24-Fresh air line; 25-Fan; 26-Wiring harness connector. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0014] In the description of this utility model, it should be understood that the terms "upper" and "lower" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0015] like Figure 1 As shown, this utility model discloses a dual-unit natural gas valve for simultaneously supplying power to both the main unit and auxiliary unit. It includes a main gas supply pipeline 1 and a gas coarse filter 2, a bus pressure sensor 3, and a bus temperature sensor 4 connected sequentially to the main gas supply pipeline 1. The main gas supply pipeline 1 is connected to high-pressure gaseous natural gas after heating and vaporization, and the pressure of the natural gas transported by the main gas supply pipeline 1 is 600 kPa - 800 kPa. The gas coarse filter 2 performs coarse filtration of the gaseous natural gas, which continues to be transported forward along the main gas supply pipeline 1. The bus pressure sensor 3 and bus temperature sensor 4 on the main gas supply pipeline 1 are used to monitor the coarsely filtered natural gas in real time, ensuring the safe operation of the subsequent main unit and auxiliary unit.

[0016] In a preferred embodiment, the main gas supply pipeline 1 is connected to the main engine gas supply pipeline 5 and the auxiliary engine gas supply pipeline 6 via a tee pipe. The main engine gas supply pipeline 5 and the auxiliary engine gas supply pipeline 6 supply gas to the main engine and auxiliary engine of the ship, respectively. The main engine gas supply pipeline 5 is connected to a main engine pressure regulating follow-up valve 7, and the auxiliary engine gas supply pipeline 6 is connected to an auxiliary engine pressure regulating follow-up valve 8. The main engine pressure regulating follow-up valve 7 and the auxiliary engine pressure regulating follow-up valve 8 are used to control the pressure and flow rate of natural gas. The maximum outlet pressure of the main engine pressure regulating follow-up valve 7 is 400 kPa-600 kPa, and the natural gas flow rate is 400 kg / hour. The maximum outlet pressure of the auxiliary engine pressure regulating follow-up valve 8 is 498 kPa, and the natural gas flow rate is 258 kg / hour.

[0017] In a preferred embodiment, after the main engine pressure regulating follow-up valve 7 on the main engine gas supply line 5, the main engine gas supply line 5 is sequentially connected to a main engine gas fine filter 9, a main engine pneumatic valve 13, and a main engine gas supply port 19. Natural gas from the main engine is filtered by the main engine gas fine filter 9, then passed through the main engine pneumatic valve 13 and delivered to the main engine gas supply port 19, which is connected to the gas inlet of the ship's engine. Simultaneously, after the auxiliary engine pressure regulating follow-up valve 8 on the auxiliary engine gas supply line 6, the auxiliary engine gas supply line 6 is sequentially connected to an auxiliary engine gas fine filter 10, an auxiliary engine pneumatic valve 14, and an auxiliary engine gas supply port 20. It should be noted that both the main engine gas supply port 19 and the auxiliary engine gas supply port 20 are connected to GVU interface flanges.

[0018] In a preferred embodiment, both the main engine pressure regulating follow-up valve 7 and the auxiliary engine pressure regulating follow-up valve 8 are connected to the follow-up valve balance line 11. The follow-up valve balance line 11 is used to discharge a portion of the excessively high-pressure natural gas to the follow-up valve balance line 11. The follow-up valve balance line 11 is also connected to the engine intake manifold connection port 12, which can directly deliver a portion of the excess natural gas to the engine intake manifold connection port 12, thereby reducing the gas pressure in the main engine gas supply line 5 and the auxiliary engine gas supply line 6 while providing gas to the engine intake manifold.

[0019] In a preferred embodiment, the main unit gas fine filter 9 and the main unit pneumatic valve 13 are connected to a three-way pipe equipped with a main unit automatic vent valve 22, and the auxiliary unit gas fine filter 10 and the auxiliary unit pneumatic valve 14 are connected to a three-way pipe equipped with an auxiliary unit automatic vent valve 23. Both the main unit automatic vent valve 22 and the auxiliary unit automatic vent valve 23 are connected to the gas guide line 21. If the pressure of the finely filtered gas on the main unit gas supply line 5 and the auxiliary unit gas supply line 6 is still too high, the excess gas is discharged from the gas guide line 21. The gas guide line 21 is connected to an air compressor and a storage tank, which can store the excess gas again for later use.

[0020] In a preferred embodiment, a main unit pressure sensor 15 and a main unit temperature sensor 16 are connected before the main unit gas supply port 19, and an auxiliary unit pressure sensor 17 and an auxiliary unit temperature sensor 18 are connected before the auxiliary unit gas supply port 20. These sensors are used to monitor the inlet pressure and temperature on the main unit gas supply line 5 and the auxiliary unit gas supply line 6 in real time, respectively, to ensure safe gas supply.

[0021] In a preferred embodiment, a fresh air duct 24 is connected to the outside of the main unit gas supply line 5 and the auxiliary unit gas supply line 6. The fresh air duct 24 is connected to a fan 25, which ventilates the main unit gas supply line 5, the auxiliary unit gas supply line 6, and various valves connected to them, reducing the risk of gas leaks. Furthermore, the wiring harnesses of the aforementioned pipelines and valves are all connected to wiring harness connectors 26 and controlled through a centralized solenoid valve box, improving modular management efficiency.

[0022] The principle of this utility model is as follows: Through a highly integrated modular design, two independent gas supply channels are integrated into one unit, which can simultaneously supply natural gas to the ship's main engine and auxiliary engines. It also has functions such as filtration, pressure stabilization, emergency shut-off, parameter monitoring and remote control, which comply with relevant ship safety regulations and effectively solve the problems of large space occupation and inconvenient installation and maintenance of traditional decentralized pipeline systems.

[0023] The preferred embodiments and examples of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments and examples. Within the scope of knowledge possessed by those skilled in the art, various changes or equivalent substitutions can be made without departing from the concept of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A dual-unit natural gas valve for simultaneously supplying both a main unit and an auxiliary unit, comprising a main gas supply pipeline (1) and a gas coarse filter (2), a bus pressure sensor (3), and a bus temperature sensor (4) sequentially connected to the main gas supply pipeline (1), characterized in that: The main gas supply line (1) is connected to the main engine gas supply line (5) equipped with the main engine pressure regulating follow-up valve (7) and the auxiliary engine gas supply line (6) equipped with the auxiliary engine pressure regulating follow-up valve (8) via a three-way pipe. The main engine gas supply line (5) is connected in sequence to the main engine gas fine filter (9), the main engine pneumatic valve (13) and the main engine gas supply port (19). The auxiliary engine gas supply line (6) is connected in sequence to the auxiliary engine gas fine filter (10), the auxiliary engine pneumatic valve (14) and the auxiliary engine gas supply port (20). The main engine pressure regulating follow-up valve (7) and the auxiliary engine pressure regulating follow-up valve (8) are both connected to the follow-up valve balance line (11) connected to the engine intake main pipe connection port (12).

2. The dual natural gas valve unit for simultaneously supplying both the main unit and auxiliary unit according to claim 1, characterized in that: The main unit gas fine filter (9) and the main unit pneumatic valve (13) are connected by a three-way pipe equipped with a main unit automatic vent valve (22). The auxiliary unit gas fine filter (10) and the auxiliary unit pneumatic valve (14) are connected by a three-way pipe equipped with an auxiliary unit automatic vent valve (23). The main unit automatic vent valve (22) and the auxiliary unit automatic vent valve (23) are both connected to the gas guide line (21).

3. The dual natural gas valve unit for simultaneously supplying both the main unit and auxiliary unit according to claim 2, characterized in that: The air delivery line (21) is connected to an air compressor and a storage tank.

4. The dual natural gas valve unit for simultaneously supplying both the main unit and auxiliary unit according to claim 1, characterized in that: The main unit gas supply port (19) and the auxiliary unit gas supply port (20) are respectively connected to the main unit pressure sensor (15) and the main unit temperature sensor (16), as well as the auxiliary unit pressure sensor (17) and the auxiliary unit temperature sensor (18).

5. The dual natural gas valve unit for simultaneously supplying both the main unit and auxiliary unit according to claim 1, characterized in that: The main unit air supply pipeline (5) and the auxiliary unit air supply pipeline (6) are connected to a fresh air pipeline (24), and the fresh air pipeline (24) is connected to a fan (25).

6. The dual natural gas valve unit for simultaneously supplying both the main unit and auxiliary unit according to claim 1, characterized in that: Both the main engine gas supply port (19) and the auxiliary engine gas supply port (20) are connected to GVU interface flanges.

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